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Health Terms starting with N

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2nd Letter:

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N,N-Dimethyltryptamine - An N-methylated indoleamine derivative, a serotonergic hallucinogen found in several plants, especia...

N-Acetylgalactosamine-4-Sulfatase - An arylsulfatase that catalyzes the hydrolysis of the 4-sulfate groups of the N-acetyl-D-galactosami...

N-Acetylgalactosaminyltransferases - Enzymes that catalyze the transfer of N-acetylgalactosamine from a nucleoside diphosphate N-acetylga...

N-Acetylglucosaminyltransferases - Enzymes that catalyze the transfer of N-acetylglucosamine from a nucleoside diphosphate N-acetylgluc...

N-Acetylhexosaminyltransferases - Enzymes that catalyze the transfer of N-acetylhexosaminyl groups to an acceptor molecule which is fr...

N-Acetyllactosamine Synthase - The A protein of the lactose synthase complex. In the presence of the B protein (LACTALBUMIN) specif...

N-Acetylmuramoyl-L-alanine Amidase - An autolytic enzyme bound to the surface of bacterial cell walls. It catalyzes the hydrolysis of the...

N-Acetylneuraminic Acid - An N-acyl derivative of neuraminic acid. N-acetylneuraminic acid occurs in many polysaccharides, gly...

N-Acylneuraminate Cytidylyltransferase - An enzyme that forms CMP-acylneuraminic acids, which donate the N-acylneuraminic acid residues to th...

N-Acylsphingosine Galactosyltransferase - An enzyme that catalyzes the conversion of UDP-galactose and N-acylsphingosine to D-galactosylcerami...

NAD - A coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrop...

NAD(P)H Dehydrogenase (Quinone) - A flavoprotein that reversibly catalyzes the oxidation of NADH or NADPH by various quinones and oxid...

NAD+ Nucleosidase - An enzyme that catalyzes the hydrolysis of nicotinamide adenine dinucleotide (NAD) to NICOTINAMIDE a...

NADH Dehydrogenase - A flavoprotein and iron sulfur-containing oxidoreductase that catalyzes the oxidation of NADH to NAD...

NADH Tetrazolium Reductase - Catalyzes the reduction of tetrazolium compounds in the presence of NADH....

NADH, NADPH Oxidoreductases - A group of oxidoreductases that act on NADH or NADPH. In general, enzymes using NADH or NADPH to red...

Nadolol - A non-selective beta-adrenergic antagonist with a long half-life, used in cardiovascular disease to ...

NADP - Nicotinamide adenine dinucleotide phosphate. A coenzyme composed of ribosylnicotinamide 5'-phosphate...

NADP Transhydrogenase - An enzyme present in the mitochondrial membrane of animals and in microorganisms. In the presence of...

NADPH Dehydrogenase - A flavoprotein that reversibly oxidizes NADPH to NADP and a reduced acceptor. EC 1.6.99.1....

NADPH Oxidase - A flavoprotein enzyme that catalyzes the univalent reduction of OXYGEN using NADPH as an electron do...

NADPH-Ferrihemoprotein Reductase - A flavoprotein that catalyzes the reduction of heme-thiolate-dependent monooxygenases and is part of...

Nadroparin - A heparin fraction with a mean molecular weight of 4500 daltons. It is isolated from porcine mucosal...

Naegleria - A free-living soil amoeba pathogenic to humans and animals. It occurs also in water and sewage. The ...

Naegleria fowleri - A species of parasitic protozoa having both an ameboid and flagellate stage in its life cycle. Infec...

Nafarelin - A potent synthetic agonist of GONADOTROPIN-RELEASING HORMONE with 3-(2-naphthyl)-D-alanine substitut...

Nafcillin - A semi-synthetic antibiotic related to penicillin....

Nafenopin - A peroxisome proliferator that is used experimentally to promote liver tumors. It has been used as a...

Nafoxidine - An estrogen antagonist that has been used in the treatment of breast cancer....

Nafronyl - A drug used in the management of peripheral and cerebral vascular disorders. It is claimed to enhanc...

Nail Biting - Common form of habitual body manipulation which is an expression of tension....

Nail Diseases - Diseases of the nail plate and tissues surrounding it. The concept is limited to primates....

Nail-Patella Syndrome - A syndrome of multiple abnormalities characterized by the absence or hypoplasia of the PATELLA and c...

Nails - The thin, horny plates that cover the dorsal surfaces of the distal phalanges of the fingers and toe...

Nails, Ingrown - Excessive lateral nail growth into the nail fold. Because the lateral margin of the nail acts as a f...

Nails, Malformed - Deformities in nail structure or appearance, including hypertrophy, splitting, clubbing, furrowing, ...

Nairobi Sheep Disease - An arbovirus infection of sheep and goats transmitted by ticks. It is characterized by high fever an...

Nairobi sheep disease virus - A species of NAIROVIRUS, transmitted by the ixodid ticks and producing a lethal gastroenteritis in s...

Nairovirus - A genus of the family BUNYAVIRIDAE named after NAIROBI SHEEP DISEASE, an acute, hemorrhagic, tick-bo...

Nalbuphine - A narcotic used as a pain medication. It appears to be an agonist at kappa opioid receptors and an a...

Naled - An organophosphate cholinesterase inhibitor that is used as an insecticide and as an acaricide....

Nalidixic Acid - A synthetic 1,8-naphthyridine antimicrobial agent with a limited bacteriocidal spectrum. It is an in...

Nalorphine - A narcotic antagonist with some agonist properties. It is an antagonist at mu opioid receptors and a...

Naloxone - A specific opiate antagonist that has no agonist activity. It is a competitive antagonist at mu, del...

Naltrexone - Derivative of noroxymorphone that is the N-cyclopropylmethyl congener of NALOXONE. It is a narcotic ...

Names - Personal names, given or surname, as cultural characteristics, as ethnological or religious patterns...

Namibia - A republic in southern Africa, south of ANGOLA and west of BOTSWANA. Its capital is Windhoek....

Nandiniidae - A family in the suborder Feliformia, order CARNIVORA, comprising one genus Nandinia binotata....

Nandrolone - C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of E...

Nanoarchaeota - A kingdom of hyperthermophilic ARCHAEA found in diverse environments....

Nanocapsules - Nanometer-sized, hollow, spherically-shaped objects that can be utilized to encapsulate small amount...

Nanocomposites - Nanometer-scale composite structures composed of organic molecules intimately incorporated with inor...

Nanofibers - Submicron-sized fibers with diameters typically between 50 and 500 nanometers. The very small dimens...

Nanomedicine - The branch of medicine concerned with the application of NANOTECHNOLOGY to the prevention and treatm...

Nanoparticles - Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materi...

Nanoshells - Nanometer range spherical cores of particular semiconductor compounds surrounded by an ultrathin met...

Nanospheres - Spherical particles of nanometer dimensions. They are biodegradable and self-assembling and have pot...

Nanostructures - Materials which have structured components with at least one dimension in the range of 1 to 100 nano...

Nanotechnology - The development and use of techniques to study physical phenomena and construct structures in the na...

Nanotubes - Nanometer-sized tubes composed of various substances including carbon (CARBON NANOTUBES), boron nitr...

Nanotubes, Carbon - Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolut...

Nanotubes, Peptide - NANOTUBES formed from cyclic peptides (PEPTIDES, CYCLIC). Alternating D and L linkages create planar...

Nanoviridae - A family of DNA viruses infecting plants and transmitted by APHIDS. Genera include NANOVIRUS and BAB...

Nanovirus - A genus in the family NANOVIRIDAE containing multiple circular single-stranded DNA molecules. The ty...

Nanowires - Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules ...

Naphazoline - An adrenergic vasoconstrictor agent used as a decongestant....

Naphthacenes - Polyacenes with four ortho-fused benzene rings in a straight linear arrangement. This group is best ...

Naphthaleneacetic Acids - Naphthalene derivatives containing the -CH2CCO2H radical at the 1-position, the 2-position, or both....

Naphthalenes - Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical...

Naphthalenesulfonates - A class of organic compounds that contains a naphthalene moiety linked to a sulfonic acid salt or es...

Naphthalimides - Compounds with three fused rings that appear like a naphthalene fused to piperidone or like a benz(d...

Naphthol AS D Esterase - Hydrolytic enzyme activity used as a histocytochemical test for the presence of esterases in tissue....

Naphthols - Naphthalene derivatives carrying one or more hydroxyl (-OH) groups at any ring position. They are of...

Naphthoquinones - Naphthalene rings which contain two ketone moieties in any position. They can be substituted in any ...

Naphthylvinylpyridine - 4(1-Naphthylvinyl)pyridine hydrochloride. Cholinesterase inhibitor. Synonym: YuB 25....

Naproxen - An anti-inflammatory agent with analgesic and antipyretic properties. Both the acid and its sodium s...

Narcissism - A psychoanalytic term meaning self-love....

Narcissus - A plant genus of the family LILIACEAE. Members contain ungiminorine and LECTINS....

Narcolepsy - A condition characterized by recurrent episodes of daytime somnolence and lapses in consciousness (m...

Narcotherapy - Intravenous injections of sodium amytal or sodium pentothal to induce a state in which the patient i...

Narcotic Antagonists - Agents inhibiting the effect of narcotics on the central nervous system....

Narcotics - Agents that induce NARCOSIS. This term is considered outdated due to imprecision but continues to be...

Nardostachys - A plant genus of the family VALERIANACEAE. Nardostachysin, nardostachin, nardosinone, valeranone, an...

Narration - The act, process, or an instance of narrating, i.e., telling a story. In the context of MEDICINE or...

Nasal Bone - Either one of the two small elongated rectangular bones that together form the bridge of the nose....

Nasal Cartilages - Hyaline cartilages in the nose. There are five major nasal cartilages including two lateral, two ala...

Nasal Cavity - The proximal portion of the respiratory passages on either side of the NASAL SEPTUM. Nasal cavities,...

Nasal Decongestants - Drugs designed to treat inflammation of the nasal passages, generally the result of an infection (mo...

Nasal Lavage - Irrigation of the nose with saline or irrigation solutions for diagnostic or therapeutic purposes. I...

Nasal Lavage Fluid - Fluid obtained by irrigation or washout of the nasal cavity and NASAL MUCOSA. The resulting fluid is...

Nasal Mucosa - The mucous lining of the NASAL CAVITY, including lining of the nostril (vestibule) and the OLFACTORY...

Nasal Obstruction - Any hindrance to the passage of air into and out of the nose. The obstruction may be unilateral or b...

Nasal Polyps - Focal accumulations of EDEMA fluid in the NASAL MUCOSA accompanied by HYPERPLASIA of the associated ...

Nasal Provocation Tests - Application of allergens to the nasal mucosa. Interpretation includes observation of nasal symptoms,...

Nasal Septum - The partition separating the two NASAL CAVITIES in the midplane. It is formed by the SEPTAL NASAL CA...

Nasopharyngeal Diseases - Pathological processes involving the NASOPHARYNX....

Nasopharyngeal Neoplasms - Tumors or cancer of the NASOPHARYNX....

Nasopharyngitis - Inflammation of the NASOPHARYNX, usually including its mucosa, related lymphoid structure, and gland...

Nasopharynx - The top portion of the pharynx situated posterior to the nose and superior to the SOFT PALATE. The n...

Nasturtium - A plant genus of the family BRASSICACEAE. Nasturtium is also used as a common name for TROPAEOLUM. T...

Natal Teeth - Predeciduous teeth present at birth. They may be well formed and normal or may represent hornified e...

Natamycin - Amphoteric macrolide antifungal antibiotic from Streptomyces natalensis or S. chattanoogensis. It is...

National Academy of Sciences (U.S.) - A United States organization of distinguished scientists and engineers established for the purpose o...

National Cancer Institute (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. Through basic and clinical biomedical research and t...

National Center for Health Care Technology (U.S.) - A center in the PUBLIC HEALTH SERVICE which coordinates and administers a program of research, demon...

National Center for Health Statistics (U.S.) - A center in the PUBLIC HEALTH SERVICE which is primarily concerned with the collection, analysis, an...

National Eye Institute (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports research on the causes, dia...

National Health Planning Information Center (U.S.) - A center in the HEALTH RESOURCES ADMINISTRATION Division of Planning Methods and Technology which pr...

National Health Programs - Components of a national health care system which administer specific services, e.g., national healt...

National Heart, Lung, and Blood Institute (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports research program related to...

National Human Genome Research Institute (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports research into the mapping o...

National Institute for Occupational Safety and Health (U.S.) - An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring saf...

National Institute of Allergy and Infectious Diseases (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports basic and applied research ...

National Institute of Arthritis and Musculoskeletal and Skin Diseases (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It supports research into the causes, treatment, and...

National Institute of Biomedical Imaging and Bioengineering (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. Its mission is to improve health by leading the deve...

National Institute of Child Health and Human Development (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It was initially established to investigate the bro...

National Institute of Dental and Craniofacial Research (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It seeks to improve oral, dental and craniofacial he...

National Institute of Diabetes and Digestive and Kidney Diseases (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports basic and applied research...

National Institute of Environmental Health Sciences (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports basic and applied research...

National Institute of General Medical Sciences (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports basic biomedical research ...

National Institute of Mental Health (U.S.) - A component of the NATIONAL INSTITUTES OF HEALTH concerned with research, overall planning, promotin...

National Institute of Neurological Disorders and Stroke - Component of the NATIONAL INSTITUTES OF HEALTH. It supports and conducts research, both basic and c...

National Institute of Nursing Research (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports clinical and basic researc...

National Institute on Aging (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. Through basic and clinical biomedical research and ...

National Institute on Alcohol Abuse and Alcoholism (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts research focused on improving the treatm...

National Institute on Deafness and Other Communication Disorders (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It conducts and supports biomedical research and res...

National Institute on Drug Abuse (U.S.) - Component of the NATIONAL INSTITUTES OF HEALTH. It supports a comprehensive research portfolio that ...

National Institutes of Health (U.S.) - An operating division of the US Department of Health and Human Services. It is concerned with the ov...

National Library of Medicine (U.S.) - An agency of the NATIONAL INSTITUTES OF HEALTH concerned with overall planning, promoting, and admin...

National Practitioner Data Bank - A databank established by the Health Care Quality Improvement Act of 1986 authorizing the Department...

National Socialism - The doctrines and policies of the Nazis or the National Social German Workers party, which ruled Ger...

Natriuresis - Sodium excretion by URINATION....

Natriuretic Agents - Endogenous or exogenous chemicals that regulate the WATER-ELECTROLYTE BALANCE in the body. They cons...

Natriuretic Peptide, Brain - A PEPTIDE that is secreted by the BRAIN and the HEART ATRIA, stored mainly in cardiac ventricular MY...

Natriuretic Peptide, C-Type - A PEPTIDE of 22 amino acids, derived mainly from cells of VASCULAR ENDOTHELIUM. It is also found in ...

Natriuretic Peptides - Peptides that regulate the WATER-ELECTROLYTE BALANCE in the body, also known as natriuretic peptide ...

Natronobacterium - A genus of rod-shaped, extremely halophilic HALOBACTERIACEAE which grows in alkaline conditions. The...

Natronococcus - A genus of coccoid, extremely halophilic HALOBACTERIACEAE which grows in alkaline conditions. They a...

Natural Childbirth - Labor and delivery without medical intervention, usually involving RELAXATION THERAPY....

Natural Cytotoxicity Triggering Receptor 1 - A 46-kD stimulatory receptor found on resting and activated NATURAL KILLER CELLS. It has specificity...

Natural Cytotoxicity Triggering Receptor 2 - A 44-kD stimulatory receptor found on activated NATURAL KILLER CELLS. It has specificity for VIRAL H...

Natural Cytotoxicity Triggering Receptor 3 - A 30 kDa stimulatory receptor found on resting and activated NATURAL KILLER CELLS....

Natural Family Planning Methods - A class of natural contraceptive methods in which SEXUAL ABSTINENCE is practiced a few days before a...

Natural History - A former branch of knowledge embracing the study, description, and classification of natural objects...

Natural Killer T-Cells - A specialized subset of T-LYMPHOCYTES that exhibit features of INNATE IMMUNITY similar to that of NA...

Natural Language Processing - Computer processing of a language with rules that reflect and describe current usage rather than pre...

Natural Science Disciplines - The sciences dealing with processes observable in nature....

Nature - The system of all phenomena in space and time; the totality of physical reality. It is both a scient...

Naturopathy - A drugless system of therapy, making use of physical forces such as air, light, water, heat, massage...

Nausea - An unpleasant sensation in the stomach usually accompanied by the urge to vomit. Common causes are e...

Nautilus - The sole genus in the family Nautilidae, order Nautilida, comprised of CEPHALOPODS with spiral exter...

Naval Medicine - The practice of medicine concerned with conditions affecting the health of individuals associated wi...

Near Drowning - Non-fatal immersion or submersion in water. The subject is resuscitable....

Nebramycin - A complex of antibiotic substances produced by Streptomyces tenebrarius....

Nebulizers and Vaporizers - Devices that cause a liquid or solid to be converted into an aerosol (spray) or a vapor. It is used ...

Necator - A genus of intestinal parasite worms which includes one of the most important hookworms of man, NECA...

Necator americanus - A common parasite of humans in the moist tropics and subtropics. These organisms attach to villi in ...

Necatoriasis - Infection of humans or animals with hookworms of the genus NECATOR. The resulting anemia from this c...

Neck Dissection - Dissection in the neck to remove all disease tissues including cervical LYMPH NODES and to leave an ...

Neck Injuries - General or unspecified injuries to the neck. It includes injuries to the skin, muscles, and other so...

Neck Muscles - The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli,...

Neck Pain - Discomfort or more intense forms of pain that are localized to the cervical region. This term genera...

Necrobiosis Lipoidica - A degenerative disease of the dermal connective tissue characterized by the development of erythemat...

Necrobiotic Disorders - A group of disorders characterized by swelling, basophilia, and distortion of collagen bundles in th...

Necrosis - The pathological process occurring in cells that are dying from irreparable injuries. It is caused b...

Nectar - Sugar-rich liquid produced in plant glands called nectaries. It is either produced in flowers or oth...

Nectria - A genus of ascomycetous fungi in the family Nectriaceae, order HYPOCREALES. They are found as saprop...

Necturus - A genus of the Proteidae family with five recognized species, which inhabit the Atlantic and Gulf dr...

Necturus maculosus - A neotenic aquatic species of mudpuppy (Necturus) occurring from Manitoba to Louisiana and Texas....

Nedocromil - A pyranoquinolone derivative that inhibits activation of inflammatory cells which are associated wit...

Needle Sharing - Usage of a single needle among two or more people for injecting drugs. Needle sharing is a high-risk...

Needle-Exchange Programs - Organized services for exchange of sterile needles and syringes used for injections as a potential m...

Needles - Sharp instruments used for puncturing or suturing....

Needlestick Injuries - Penetrating stab wounds caused by needles. They are of special concern to health care workers since ...

Needs Assessment - Systematic identification of a population's needs or the assessment of individuals to determine the ...

nef Gene Products, Human Immunodeficiency Virus - Proteins encoded by the NEF GENES of the HUMAN IMMUNODEFICIENCY VIRUS....

Nefopam - Non-narcotic analgesic chemically similar to ORPHENADRINE. Its mechanism of action is unclear. It is...

Negative Staining - The technique of washing tissue specimens with a concentrated solution of a heavy metal salt and let...

Negative-Pressure Wound Therapy - The application of a vacuum across the surface of a wound through a foam dressing cut to fit the wou...

Negativism - State of mind or behavior characterized by extreme skepticism and persistent opposition or resistanc...

Negotiating - The process of bargaining in order to arrive at an agreement or compromise on a matter of importance...

Neisseria - A genus of gram-negative, aerobic, coccoid bacteria whose organisms are part of the normal flora of ...

Neisseria cinerea - A species of gram-negative, aerobic bacteria found in the human NASOPHARYNX....

Neisseria elongata - A species of gram-negative, aerobic BACTERIA consisting of short chains of rods. It has been isolate...

Neisseria gonorrhoeae - A species of gram-negative, aerobic bacteria primarily found in purulent venereal discharges. It is ...

Neisseria lactamica - A species of gram-negative, aerobic BACTERIA commonly found in the NASOPHARYNX of infants and childr...

Neisseria meningitidis - A species of gram-negative, aerobic BACTERIA. It is a commensal and pathogen only of humans, and can...

Neisseria meningitidis, Serogroup A - Strains of Neisseria meningitidis responsible for most outbreaks of meningococcal disease in Western...

Neisseria meningitidis, Serogroup B - Strains of Neisseria meningitidis which are the most common ones causing infections or disease in in...

Neisseria meningitidis, Serogroup C - Strains of Neisseria meningitidis responsible for most sporadic cases in teenagers and almost all ou...

Neisseria meningitidis, Serogroup W-135 - Strains of Neisseria meningitidis found mostly in Africa....

Neisseria meningitidis, Serogroup Y - Strains of Neisseria meningitidis which, in the United States, causes disease in mostly adults and t...

Neisseria mucosa - A species of gram-negative, aerobic BACTERIA, found in the human NASOPHARYNX and in the normal flora...

Neisseria sicca - A species of gram-negative, aerobic BACTERIA found in the human NASOPHARYNX; SALIVA; and SPUTUM....

Neisseriaceae - A family of gram-negative, parasitic bacteria including several important pathogens of man....

Neisseriaceae Infections - Infections with bacteria of the family NEISSERIACEAE....

Nelfinavir - A potent HIV protease inhibitor. It is used in combination with other antiviral drugs in the treatme...

Nelson Syndrome - A syndrome characterized by HYPERPIGMENTATION, enlarging pituitary mass, visual defects secondary to...

Nelumbo - A plant genus of the family NELUMBONACEAE. The common name of lotus is also for LOTUS and NYMPHAEA....

Nelumbonaceae - A plant family of the order Nymphaeales, subclass Magnoliidae, class Magnoliopsida. They are aquati...

Nematoda - A class of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmet...

Nematode Infections - Infections by nematodes, general or unspecified....

Nematospiroides - A genus of nematodes found mainly in mice. Its organisms are used in biomedical research....

Nematospiroides dubius - A species of intestinal nematode parasites which occur most commonly in mice. Infection is by ingest...

Neoadjuvant Therapy - Preliminary cancer therapy (chemotherapy, radiation therapy, hormone/endocrine therapy, immunotherap...

Neocallimastigales - An order of fungi in the phylum NEOCALLIMASTIGOMYCOTA comprising anaerobic chytrids that inhabit the...

Neocallimastigomycota - A phylum of anaerobic fungi found in the stomachs of RUMINANTS. These fungi lack mitochondria and re...

Neocallimastix - A genus of fungi in the family Neocallimasticaceae, order NEOCALLIMASTIGALES. They contain polyflage...

Neocortex - The largest portion of the CEREBRAL CORTEX. It is composed of NEURONS arranged in six layers....

Neodymium - Neodymium. An element of the rare earth family of metals. It has the atomic symbol Nd, atomic number...

Neomycin - Antibiotic complex produced by Streptomyces fradiae. It is composed of neomycins A, B, and C. It act...

Neon - Neon. A noble gas with the atomic symbol Ne, atomic number 10, and atomic weight 20.18. It is found ...

Neonatal Abstinence Syndrome - Fetal and neonatal addiction and withdrawal as a result of the mother's dependence on drugs during p...

Neonatal Nursing - The nursing specialty that deals with the care of newborn infants during the first four weeks after ...

Neonatal Screening - The identification of selected parameters in newborn infants by various tests, examinations, or othe...

Neonatology - A subspecialty of Pediatrics concerned with the newborn infant....

Neoplasm Invasiveness - Ability of neoplasms to infiltrate and actively destroy surrounding tissue....

Neoplasm Metastasis - The transfer of a neoplasm from one organ or part of the body to another remote from the primary sit...

Neoplasm Proteins - Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or pr...

Neoplasm Recurrence, Local - The local recurrence of a neoplasm following treatment. It arises from microscopic cells of the orig...

Neoplasm Regression, Spontaneous - Disappearance of a neoplasm or neoplastic state without the intervention of therapy....

Neoplasm Seeding - The local implantation of tumor cells by contamination of instruments and surgical equipment during ...

Neoplasm Staging - Methods which attempt to express in replicable terms the extent of the neoplasm in the patient....

Neoplasm Transplantation - Experimental transplantation of neoplasms in laboratory animals for research purposes....

Neoplasm, Residual - Remnant of a tumor or cancer after primary, potentially curative therapy. (Dr. Daniel Masys, written...

Neoplasms - New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the p...

Neoplasms by Histologic Type - A collective term for the various histological types of NEOPLASMS. It is more likely to be used by s...

Neoplasms by Site - A collective term for precoordinated organ/neoplasm headings locating neoplasms by organ, as BRAIN N...

Neoplasms, Adipose Tissue - Neoplasms composed of fatty tissue or connective tissue made up of fat cells in a meshwork of areola...

Neoplasms, Adnexal and Skin Appendage - Neoplasms composed of sebaceous or sweat gland tissue or tissue of other skin appendages. The concep...

Neoplasms, Basal Cell - Neoplasms composed of cells from the deepest layer of the epidermis. The concept does not refer to n...

Neoplasms, Bone Tissue - Neoplasms composed of bony tissue, whether normal or of a soft tissue which has become ossified. The...

Neoplasms, Complex and Mixed - Neoplasms composed of more than one type of neoplastic tissue....

Neoplasms, Connective and Soft Tissue - Neoplasms developing from some structure of the connective and subcutaneous tissue. The concept does...

Neoplasms, Connective Tissue - Neoplasms composed of connective tissue, including elastic, mucous, reticular, osseous, and cartilag...

Neoplasms, Cystic, Mucinous, and Serous - Neoplasms containing cyst-like formations or producing mucin or serum....

Neoplasms, Ductal, Lobular, and Medullary - Neoplasms, usually carcinoma, located within the center of an organ or within small lobes, and in th...

Neoplasms, Experimental - Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying huma...

Neoplasms, Fibroepithelial - Neoplasms composed of fibrous and epithelial tissue. The concept does not refer to neoplasms located...

Neoplasms, Fibrous Tissue - Neoplasms composed of fibrous tissue, the ordinary connective tissue of the body, made up largely of...

Neoplasms, Germ Cell and Embryonal - Neoplasms composed of primordial GERM CELLS of embryonic GONADS or of elements of the germ layers of...

Neoplasms, Glandular and Epithelial - Neoplasms composed of glandular tissue, an aggregation of epithelial cells that elaborate secretions...

Neoplasms, Gonadal Tissue - Neoplasms composed of tissues of the OVARY or the TESTIS, not neoplasms located in the ovaries or te...

Neoplasms, Hormone-Dependent - Certain tumors that 1, arise in organs that are normally dependent on specific hormones and 2, are s...

Neoplasms, Mesothelial - Neoplasms composed of tissue of the mesothelium, the layer of flat cells, derived from the mesoderm,...

Neoplasms, Multiple Primary - Two or more abnormal growths of tissue occurring simultaneously and presumed to be of separate origi...

Neoplasms, Muscle Tissue - Neoplasms composed of muscle tissue: skeletal, cardiac, or smooth. The concept does not refer to neo...

Neoplasms, Nerve Tissue - Neoplasms composed of nerve tissue. This concept does not refer to neoplasms located in the nervous ...

Neoplasms, Neuroepithelial - Neoplasms composed of neuroepithelial cells, which have the capacity to differentiate into NEURONS, ...

Neoplasms, Plasma Cell - Neoplasms associated with a proliferation of a single clone of PLASMA CELLS and characterized by the...

Neoplasms, Post-Traumatic - Tumors, cancer or other neoplasms caused by or resulting from trauma or other non-radiation injuries...

Neoplasms, Radiation-Induced - Tumors, cancer or other neoplasms produced by exposure to ionizing or non-ionizing radiation....

Neoplasms, Second Primary - Abnormal growths of tissue that follow a previous neoplasm but are not metastases of the latter. The...

Neoplasms, Squamous Cell - Neoplasms composed of squamous cells of the epithelium. The concept does not refer to neoplasms loca...

Neoplasms, Unknown Primary - Metastases in which the tissue of origin is unknown....

Neoplasms, Vascular Tissue - Neoplasms composed of vascular tissue. This concept does not refer to neoplasms located in blood ves...

Neoplastic Cells, Circulating - Exfoliate neoplastic cells circulating in the blood and associated with metastasizing tumors....

Neoplastic Processes - The pathological mechanisms and forms taken by tissue during degeneration into a neoplasm and its su...

Neoplastic Stem Cells - Colony-forming cells which give rise to NEOPLASMS. They have properties similar to normal stem cells...

Neoplastic Syndromes, Hereditary - The condition of a pattern of malignancies within a family, but not every individual's necessarily h...

Neoprene - An oil-resistant synthetic rubber made by the polymerization of chloroprene....

Neopterin - A pteridine derivative present in body fluids; elevated levels result from immune system activation,...

Neorickettsia - Genus of gram-negative, intracytoplasmic bacteria that are found primarily in VACUOLES of MONOCYTES ...

Neorickettsia risticii - A species of gram-negative bacteria in the genus NEORICKETTSIA, family ANAPLASMATACEAE....

Neorickettsia sennetsu - A species of gram-negative bacteria in the genus NEORICKETTSIA, family ANAPLASMATACEAE, causing Senn...

Neosartorya - A genus of ascomycetous fungi in the family Trichocomaceae, order EUROTIALES. Some species can cause...

Neospora - A genus of protozoan parasites of the subclass COCCIDIA. Its species are parasitic in dogs, cattle, ...

Neostigmine - A cholinesterase inhibitor used in the treatment of myasthenia gravis and to reverse the effects of ...

Neostriatum - The phylogenetically newer part of the CORPUS STRIATUM consisting of the CAUDATE NUCLEUS and PUTAMEN...

Neotyphodium - The anamorphic form of the fungus EPICHLOE. Many Neotyphodium species produce ERGOT ALKALOIDS....

Neovascularization, Pathologic - A pathologic process consisting in proliferation of blood vessels in abnormal tissues or in abnormal...

Neovascularization, Physiologic - The development of new BLOOD VESSELS in restoration of BLOOD CIRCULATION during the healing process....

Nepeta - A genus of the LAMIACEAE family. It is known for its mild calming effect and for the way cats are at...

Nephelometry and Turbidimetry - Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed par...

Nephrectomy - Excision of a kidney. (Dorland, 28th ed)...

Nephritis - Inflammation of any part of the KIDNEY....

Nephritis, Hereditary - A group of inherited conditions characterized initially by HEMATURIA and slowly progressing to RENAL...

Nephritis, Interstitial - Inflammation of the interstitial tissue of the kidney. This term is generally used for primary infla...

Nephroblastoma Overexpressed Protein - A CCN protein family member found at high levels in NEPHROBLASTOMA cells. It is found both intracell...

Nephrocalcinosis - A condition characterized by calcification of the renal tissue itself. It is usually seen in distal ...

Nephrogenic Fibrosing Dermopathy - A chronic, acquired, idiopathic, progressive eruption of the skin that occurs in the context of RENA...

Nephrolithiasis - Formation of stones in the KIDNEY....

Nephrology - A subspecialty of internal medicine concerned with the anatomy, physiology, and pathology of the kid...

Nephroma, Mesoblastic - A solid, unencapsulated tumor of the KIDNEY composed of spindle mesenchymal cells that resemble FIBR...

Nephrons - The functional units of the kidney, consisting of the glomerulus and the attached tubule....

Nephropidae - Family of large marine CRUSTACEA, in the order DECAPODA. These are called clawed lobsters because th...

Nephrosclerosis - Hardening of the KIDNEY due to infiltration by fibrous connective tissue (FIBROSIS), usually caused ...

Nephrosis - Pathological processes of the KIDNEY without inflammatory or neoplastic components. Nephrosis may be...

Nephrosis, Lipoid - A kidney disease with no or minimal histological glomerular changes on light microscopy and with no ...

Nephrostomy, Percutaneous - The insertion of a catheter through the skin and body wall into the kidney pelvis, mainly to provide...

Nephrotic Syndrome - A condition characterized by severe PROTEINURIA, greater than 3.5 g/day in an average adult. The sub...

Nepovirus - A genus of polyhedral plant viruses of the family COMOVIRIDAE causing ringspots and spotting on leav...

Neprilysin - Enzyme that is a major constituent of kidney brush-border membranes and is also present to a lesser ...

Neptune - The eighth planet in order from the sun. It is one of the five outer planets of the solar system. It...

Neptunium - Neptunium. A radioactive element of the actinide metals family. It has the atomic symbol Np, atomic ...

Nerium - A plant genus of the family APOCYNACEAE. It is a very poisonous plant that contains cardioactive age...

Nerve Block - Interruption of the conduction of impulses in peripheral nerves or nerve trunks by the injection of ...

Nerve Compression Syndromes - Mechanical compression of nerves or nerve roots from internal or external causes. These may result i...

Nerve Degeneration - Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations...

Nerve Endings - Branch-like terminations of NERVE FIBERS, sensory or motor NEURONS. Endings of sensory neurons are t...

Nerve Expansion - Procedures that stimulate nerve elongation over a period of time. They are used in repairing nerve t...

Nerve Fibers - Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve f...

Nerve Fibers, Myelinated - A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. Th...

Nerve Fibers, Unmyelinated - A class of nerve fibers as defined by their structure, specifically the nerve sheath arrangement. Th...

Nerve Growth Factor - NERVE GROWTH FACTOR is the first of a series of neurotrophic factors that were found to influence th...

Nerve Growth Factors - Factors which enhance the growth potentialities of sensory and sympathetic nerve cells....

Nerve Net - A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junc...

Nerve Regeneration - Renewal or physiological repair of damaged nerve tissue....

Nerve Sheath Neoplasms - Neoplasms which arise from nerve sheaths formed by SCHWANN CELLS in the PERIPHERAL NERVOUS SYSTEM or...

Nerve Transfer - Surgical reinnervation of a denervated peripheral target using a healthy donor nerve and/or its prox...

Nervous System - The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral ...

Nervous System Autoimmune Disease, Experimental - Experimental animal models for human AUTOIMMUNE DISEASES OF THE NERVOUS SYSTEM. They include GUILLAI...

Nervous System Diseases - Diseases of the central and peripheral nervous system. This includes disorders of the brain, spinal ...

Nervous System Malformations - Structural abnormalities of the central or peripheral nervous system resulting primarily from defect...

Nervous System Neoplasms - Benign and malignant neoplastic processes arising from or involving components of the central, perip...

Nervous System Physiological Phenomena - Characteristic properties and processes of the NERVOUS SYSTEM as a whole or with reference to the pe...

Nervous System Physiological Processes - Biological actions and events that constitute the functions of the NERVOUS SYSTEM....

Nesidioblastosis - An inherited autosomal recessive syndrome characterized by the disorganized formation of new islets ...

Nested Genes - Genes whose entire sequences are contained within other genes....

Nesting Behavior - Animal behavior associated with the nest; includes construction, effects of size and material; behav...

Netherlands Antilles - A Netherlands overseas territory in the Lesser Antilles in the West Indies. It includes the islands ...

Netherton Syndrome - Rare autosomal recessive disease with variable expressions. Clinical features of the disease include...

N-Ethylmaleimide-Sensitive Proteins - ATPases that are members of the AAA protein superfamily (ATPase family Associated with various cellu...

Netilmicin - Semisynthetic 1-N-ethyl derivative of SISOMYCIN, an aminoglycoside antibiotic with action similar to...

Netropsin - A basic polypeptide isolated from Streptomyces netropsis. It is cytotoxic and its strong, specific b...

Neural Analyzers - A term used in Eastern European research literature for the functional neural unit that provides the...

Neural Cell Adhesion Molecule L1 - A member of the immunoglobulin superfamily of neuronal cell adhesion molecules that is required for ...

Neural Cell Adhesion Molecules - Cell adhesion molecule involved in a diverse range of contact-mediated interactions among neurons, a...

Neural Conduction - The propagation of the NERVE IMPULSE along the nerve away from the site of an excitation stimulus....

Neural Crest - The two longitudinal ridges along the PRIMITIVE STREAK appearing near the end of GASTRULATION during...

Neural Inhibition - The function of opposing or restraining the excitation of neurons or their target excitable cells....

Neural Networks (Computer) - A computer architecture, implementable in either hardware or software, modeled after biological neur...

Neural Pathways - Neural tracts connecting one part of the nervous system with another....

Neural Plate - The region in the dorsal ECTODERM of a chordate embryo that gives rise to the future CENTRAL NERVOUS...

Neural Tube - A tube of ectodermal tissue in an embryo that will give rise to the CENTRAL NERVOUS SYSTEM, includin...

Neural Tube Defects - Congenital malformations of the central nervous system and adjacent structures related to defective ...

Neuralgia - Intense or aching pain that occurs along the course or distribution of a peripheral or cranial nerve...

Neuralgia, Postherpetic - Pain in nerves, frequently involving facial SKIN, resulting from the activation the latent varicella...

Neuraminidase - An enzyme that catalyzes the hydrolysis of alpha-2,3, alpha-2,6-, and alpha-2,8-glycosidic linkages ...

Neurasthenia - A mental disorder characterized by chronic fatigue and concomitant physiologic symptoms....

Neuregulin-1 - A peptide factor originally identified by its ability to stimulate the phosphorylation the erbB-2 re...

Neuregulins - A family of peptides originally found as factors that stimulate the phosphorylation of the erbB-2 re...

Neurilemma - The nerve husk. The outermost part of the MYELIN SHEATH covering a myelinated nerve fiber (NERVE FIB...

Neurilemmoma - A neoplasm that arises from SCHWANN CELLS of the cranial, peripheral, and autonomic nerves. Clinical...

Neurites - In tissue culture, hairlike projections of neurons stimulated by growth factors and other molecules....

Neuritis - A general term indicating inflammation of a peripheral or cranial nerve. Clinical manifestation may ...

Neuritis, Autoimmune, Experimental - An experimental animal model for the demyelinating disease of GUILLAINE-BARRE SYNDROME. In the most ...

Neuroacanthocytosis - An inherited autosomal disorder that is characterized by neurodegeneration; orofacial and buccal DYS...

Neuroanatomical Tract-Tracing Techniques - Methods used to label and follow the course of NEURAL PATHWAYS by AXONAL TRANSPORT of injected NEURO...

Neuroanatomy - Study of the anatomy of the nervous system as a specialty or discipline....

Neuroaspergillosis - Infections of the nervous system caused by fungi of the genus ASPERGILLUS, most commonly ASPERGILLUS...

Neuroaxonal Dystrophies - A nonspecific term referring both to the pathologic finding of swelling of distal portions of axons ...

Neurobehavioral Manifestations - Signs and symptoms of higher cortical dysfunction caused by organic conditions. These include certai...

Neurobiology - The study of the structure, growth, activities, and functions of NEURONS and the NERVOUS SYSTEM....

Neuroblastoma - A common neoplasm of early childhood arising from neural crest cells in the sympathetic nervous syst...

Neurocalcin - A neuronal calcium sensor protein that is expressed as several isoforms and can interact with ACTIN;...

Neurochemistry - The study of the composition, chemical structures, and chemical reactions of the NERVOUS SYSTEM or i...

Neurocirculatory Asthenia - A clinical syndrome characterized by palpitation, SHORTNESS OF BREATH, labored breathing, subjective...

Neurocutaneous Syndromes - A group of disorders characterized by ectodermal-based malformations and neoplastic growths in the s...

Neurocysticercosis - Infection of the brain, spinal cord, or perimeningeal structures with the larval forms of the genus ...

Neurocytoma - A benign brain tumor composed of neural elements which most often arise from the SEPTUM PELLUCIDUM a...

Neurodegenerative Diseases - Hereditary and sporadic conditions which are characterized by progressive nervous system dysfunction...

Neurodermatitis - An extremely variable eczematous skin disease that is presumed to be a response to prolonged vigorou...

Neuroectodermal Tumor, Melanotic - A benign, rapidly growing, deeply pigmented tumor of the jaw and occasionally of other sites, consis...

Neuroectodermal Tumors - Malignant neoplasms arising in the neuroectoderm, the portion of the ectoderm of the early embryo th...

Neuroectodermal Tumors, Primitive - A group of malignant tumors of the nervous system that feature primitive cells with elements of neur...

Neuroectodermal Tumors, Primitive, Peripheral - A group of highly cellular primitive round cell neoplasms which occur extracranially in soft tissue ...

Neuroeffector Junction - The synapse between a neuron (presynaptic) and an effector cell other than another neuron (postsynap...

Neuroendocrine Cells - Specialized NEURONS that produce hormones, such as NEUROPEPTIDES or BIOGENIC AMINES. They generally ...

Neuroendocrine Secretory Protein 7B2 - An acidic protein found in the NEUROENDOCRINE SYSTEM that functions as a molecular chaperone for PRO...

Neuroendocrine Tumors - Tumors whose cells possess secretory granules and originate from the neuroectoderm, i.e., the cells ...

Neuroendocrinology - The study of the anatomical and functional relationships between the nervous system and the endocrin...

Neuroendoscopes - Instruments for the visual examination of interior structures related to NEUROSURGICAL PROCEDURES. T...

Neuroendoscopy - PROCEDURES that use NEUROENDOSCOPES for disease diagnosis and treatment. Neuroendoscopy, generally a...

Neuroepithelial Bodies - Innervated clusters of NEUROEPITHELIAL CELLS found in the LUNGS. They act as airway OXYGEN sensors, ...

Neuroepithelial Cells - Cells of epithelial origin possessing specialized sensory functions. They include cells that are fou...

Neurofibrillary Tangles - Abnormal structures located in various parts of the brain and composed of dense arrays of paired hel...

Neurofibrils - The delicate interlacing threads, formed by aggregations of neurofilaments and neurotubules, coursin...

Neurofibroma - A moderately firm, benign, encapsulated tumor resulting from proliferation of SCHWANN CELLS and FIBR...

Neurofibroma, Plexiform - A type of neurofibroma manifesting as a diffuse overgrowth of subcutaneous tissue, usually involving...

Neurofibromatoses - A group of disorders characterized by an autosomal dominant pattern of inheritance with high rates o...

Neurofibromatosis 1 - An autosomal dominant inherited disorder (with a high frequency of spontaneous mutations) that featu...

Neurofibromatosis 2 - An autosomal dominant disorder characterized by a high incidence of bilateral acoustic neuromas as w...

Neurofibromin 1 - A protein found most abundantly in the nervous system. Defects or deficiencies in this protein are a...

Neurofibromin 2 - A membrane protein homologous to the ERM (Ezrin-Radixin-Moesin) family of cytoskeleton-associated pr...

Neurofibrosarcoma - A malignant tumor that arises from small cutaneous nerves, is locally aggressive, and has a potentia...

Neurofilament Proteins - Type III intermediate filament proteins that assemble into neurofilaments, the major cytoskeletal el...

Neurogenesis - Formation of NEURONS which involves the differentiation and division of STEM CELLS in which one or b...

Neurogenic Bowel - Loss or absence of normal intestinal function due to nerve damage or birth defects. It is characteri...

Neurogenic Inflammation - Inflammation caused by an injurious stimulus of peripheral neurons and resulting in release of neuro...

Neuroglia - The non-neuronal cells of the nervous system. They not only provide physical support, but also respo...

Neurogranin - A BRAIN-specific substrate for PROTEIN KINASE C that binds CALMODULIN and is involved in regulation ...

Neuroimmunomodulation - The biochemical and electrophysiological interactions between the NERVOUS SYSTEM and IMMUNE SYSTEM t...

Neurokinin A - A mammalian neuropeptide of 10 amino acids that belongs to the tachykinin family. It is similar in s...

Neurokinin B - A mammalian neuropeptide of 10 amino acids that belongs to the tachykinin family. It is similar in s...

Neuroleptanalgesia - A form of analgesia accompanied by general quiescence and psychic indifference to environmental stim...

Neuroleptic Malignant Syndrome - A potentially fatal syndrome associated primarily with the use of neuroleptic agents (see ANTIPSYCHO...

Neuroleukin - Neuronal growth factor and lymphokine product of lectin-stimulated T-cells which induces immunoglobu...

Neurolinguistic Programming - A set of models of how communication impacts and is impacted by subjective experience. Techniques ar...

Neurologic Manifestations - Clinical signs and symptoms caused by nervous system injury or dysfunction....

Neurology - A medical specialty concerned with the study of the structures, functions, and diseases of the nervo...

Neuroma - A tumor made up of nerve cells and nerve fibers. (Dorland, 27th ed)...

Neuroma, Acoustic - A benign SCHWANNOMA of the eighth cranial nerve (VESTIBULOCOCHLEAR NERVE), mostly arising from the v...

Neuromuscular Agents - Drugs used for their actions on skeletal muscle. Included are agents that act directly on skeletal m...

Neuromuscular Blockade - The intentional interruption of transmission at the NEUROMUSCULAR JUNCTION by external agents, usual...

Neuromuscular Blocking Agents - Drugs that interrupt transmission of nerve impulses at the skeletal neuromuscular junction. They can...

Neuromuscular Depolarizing Agents - Drugs that interrupt transmission at the skeletal neuromuscular junction by causing sustained depola...

Neuromuscular Diseases - A general term encompassing lower MOTOR NEURON DISEASE; PERIPHERAL NERVOUS SYSTEM DISEASES; and cert...

Neuromuscular Junction - The synapse between a neuron and a muscle....

Neuromuscular Junction Diseases - Conditions characterized by impaired transmission of impulses at the NEUROMUSCULAR JUNCTION. This ma...

Neuromuscular Manifestations - Signs and symptoms associated with diseases of the muscle, neuromuscular junction, or peripheral ner...

Neuromuscular Nondepolarizing Agents - Drugs that interrupt transmission at the skeletal neuromuscular junction without causing depolarizat...

Neuromyelitis Optica - A syndrome characterized by acute OPTIC NEURITIS in combination with acute MYELITIS, TRANSVERSE. Dem...

Neuronal Apoptosis-Inhibitory Protein - An inhibitor of apoptosis protein that was initially identified during analysis of CHROMOSOME DELETI...

Neuronal Calcium-Sensor Proteins - A family of intracellular calcium-sensing proteins found predominately in NEURONS and PHOTORECEPTOR ...

Neuronal Ceroid-Lipofuscinoses - A group of severe neurodegenerative diseases characterized by intracellular accumulation of autofluo...

Neuronal Migration Disorders - Disorders resulting from defects in migration of neuronal cells during neurogenesis. Developing nerv...

Neuronal Plasticity - The capacity of the NERVOUS SYSTEM to change its reactivity as the result of successive activations....

Neuronal Tract-Tracers - Substances used to identify the location and to characterize the types of NEURAL PATHWAYS....

Neuronavigation - Intraoperative computer-assisted 3D navigation and guidance system generally used in neurosurgery fo...

Neurons - The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. ...

Neurons, Afferent - Neurons which conduct NERVE IMPULSES to the CENTRAL NERVOUS SYSTEM....

Neurons, Efferent - Neurons which send impulses peripherally to activate muscles or secretory cells....

Neuropeptide Y - A 36-amino acid peptide present in many organs and in many sympathetic noradrenergic neurons. It has...

Neuropeptides - Peptides released by NEURONS as intercellular messengers. Many neuropeptides are also hormones relea...

Neuropharmacology - The branch of pharmacology dealing especially with the action of drugs upon various parts of the ner...

Neurophysins - Carrier proteins for OXYTOCIN and VASOPRESSIN. They are polypeptides of about 10-kDa, synthesized in...

Neurophysiology - The scientific discipline concerned with the physiology of the nervous system....

Neuropil - A dense intricate feltwork of interwoven fine glial processes, fibrils, synaptic terminals, axons, a...

Neuropil Threads - Abnormal structures located chiefly in distal dendrites and, along with NEUROFIBRILLARY TANGLES and ...

Neuropilin-1 - Dimeric cell surface receptor involved in angiogenesis (NEOVASCULARIZATION, PHYSIOLOGICAL) and axona...

Neuropilin-2 - Transmembrane receptor for CLASS 3 SEMAPHORINS and several vascular endothelial growth factor isofor...

Neuropilins - Neuropilins are 140-kDa vertebrate cell surface receptors that bind neuronal guidance molecules duri...

Neuroprotective Agents - Drugs intended to prevent damage to the brain or spinal cord from ischemia, stroke, convulsions, or ...

Neuropsychological Tests - Tests designed to assess neurological function associated with certain behaviors. They are used in d...

Neuropsychology - A branch of psychology which investigates the correlation between experience or behavior and the bas...

Neuroradiography - Radiography of the central nervous system....

Neuroschistosomiasis - SCHISTOSOMIASIS of the brain, spinal cord, or meninges caused by infections with trematodes of the g...

Neurosciences - The scientific disciplines concerned with the embryology, anatomy, physiology, biochemistry, pharmac...

Neurosecretion - The production and release of substances such as NEUROTRANSMITTERS or HORMONES from nerve cells....

Neurosecretory Systems - A system of neurons that has the specialized function to produce and secrete hormones, and that cons...

Neurospora - A genus of ascomycetous fungi, family Sordariaceae, order SORDARIALES, comprising bread molds. They ...

Neurospora crassa - A species of ascomycetous fungi of the family Sordariaceae, order SORDARIALES, much used in biochemi...

Neurosurgery - A surgical specialty concerned with the treatment of diseases and disorders of the brain, spinal cor...

Neurosurgical Procedures - Surgery performed on the nervous system or its parts....

Neurosyphilis - Infections of the central nervous system caused by TREPONEMA PALLIDUM which present with a variety o...

Neurotensin - A biologically active tridecapeptide isolated from the hypothalamus. It has been shown to induce hyp...

Neurothekeoma - A benign myxoma of cutaneous nerve sheath origin. Theke is from the Greek theke, sheath. (From Stedm...

Neurotic Disorders - Disorders in which the symptoms are distressing to the individual and recognized by him or her as be...

Neurotoxicity Syndromes - Neurologic disorders caused by exposure to toxic substances through ingestion, injection, cutaneous ...

Neurotoxins - Toxic substances from microorganisms, plants or animals that interfere with the functions of the ner...

Neurotransmitter Agents - Substances used for their pharmacological actions on any aspect of neurotransmitter systems. Neurotr...

Neurotransmitter Transport Proteins - Membrane transport proteins found predominately in NEURONS and neuroendocrine cells that facilitate ...

Neurotransmitter Uptake Inhibitors - Drugs that inhibit the transport of neurotransmitters into axon terminals or into storage vesicles w...

Neurotrophin 3 - A neurotrophic factor involved in regulating the survival of visceral and proprioceptive sensory neu...

Neurturin - A glial cell line-derived neurotrophic factor ligand that is specific for the GFRA2 RECEPTOR. Neurtu...

Neurulation - An early embryonic developmental process of CHORDATES that is characterized by morphogenic movements...

Neutral Ceramidase - A ceramidase subtype that is active at neutral pH. It is found at high levels within the SMALL INTES...

Neutral Glycosphingolipids - A subclass of GLYCOSPHINGOLIPIDS containing one or more sugars within their head group connected dir...

Neutral Red - A vital dye used as an indicator and biological stain. Various adverse effects have been observed in...

Neutralization Tests - The measurement of infection-blocking titer of ANTISERA by testing a series of dilutions for a given...

Neutron Activation Analysis - Activation analysis in which the specimen is bombarded with neutrons. Identification is made by meas...

Neutron Capture Therapy - A technique for the treatment of neoplasms in which an isotope is introduced into target cells follo...

Neutron Diffraction - The scattering of NEUTRONS by matter, especially crystals, with accompanying variation in intensity ...

Neutrons - Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass...

Neutropenia - A decrease in the number of neutrophilic leukocytes in the blood. (Dorland, 27th ed)...

Neutrophil Activation - The process in which the neutrophil is stimulated by diverse substances, resulting in degranulation ...

Neutrophil Infiltration - The diffusion or accumulation of neutrophils in tissues or cells in response to a wide variety of su...

Neutrophils - Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chroma...

Nevi and Melanomas - A collective term for the various types of nevi and melanomas....

Nevirapine - A potent, non-nucleoside reverse transcriptase inhibitor used in combination with nucleoside analogu...

Nevus - A circumscribed stable malformation of the skin and occasionally of the oral mucosa, which is not du...

Nevus of Ota - A macular lesion on the side of the FACE, involving the CONJUNCTIVA and EYELIDS, as well as the adja...

Nevus, Blue - Usually a benign tumor, that commonly presents as a solitary blue nodule with spindled MELANOCYTES c...

Nevus, Epithelioid and Spindle Cell - A benign compound nevus occurring most often in children before puberty, composed of spindle and epi...

Nevus, Halo - A benign skin lesion characterized by a zone of depigmentation surrounding the nevus....

Nevus, Intradermal - A nevus in which nests of melanocytes are found in the dermis, but not at the epidermal-dermal junct...

Nevus, Pigmented - A nevus containing melanin. The term is usually restricted to nevocytic nevi (round or oval collecti...

Nevus, Sebaceous of Jadassohn - A syndrome characterized by lesions occurring on the face, scalp, or neck which consist of congenita...

Nevus, Spindle Cell - A form of pigmented nevus showing intense melanocytic activity around the dermo-epidermal junction. ...

New Brunswick - A province of eastern Canada, one of the Maritime Provinces with NOVA SCOTIA; PRINCE EDWARD ISLAND; ...

New Caledonia - A group of islands in Melanesia constituting a French overseas territory. The group includes New Cal...

New England - The geographic area of New England in general and when the specific state or states are not indicate...

New Guinea - Originally an island of the Malay Archipelago, the second largest island in the world. It divided, W...

New Orleans - City in Orleans Parish (county), largest city in state of LOUISIANA. It is located between the Missi...

New South Wales - A state in southeastern Australia. Its capital is Sydney. It was discovered by Captain Cook in 1770 ...

New Zealand - A group of islands in the southwest Pacific. Its capital is Wellington. It was discovered by the Dut...

Newcastle Disease - An acute febrile, contagious, viral disease of birds caused by an AVULAVIRUS called NEWCASTLE DISEAS...

Newcastle disease virus - The most well known avian paramyxovirus in the genus AVULAVIRUS and the cause of a highly infectious...

Newfoundland and Labrador - Province of Canada consisting of the island of Newfoundland and an area of Labrador. Its capital is ...

News - Works consisting of an announcement or statement of recent or current events of new data and matters...

Newspaper Article - Work consisting of a news item appearing in a general-interest newspaper or other general news perio...

Newspapers - Publications printed and distributed daily, weekly, or at some other regular and usually short inter...

NFATC Transcription Factors - A family of transcription factors characterized by the presence of highly conserved calcineurin- and...

NF-E2 Transcription Factor - A basic-leucine zipper transcription factor that regulates GLOBIN gene expression and is related to ...

NF-E2 Transcription Factor, p45 Subunit - A tissue-specific subunit of NF-E2 transcription factor that interacts with small MAF PROTEINS to re...

NF-E2-Related Factor 1 - A basic-leucine zipper transcription factor that is involved in regulating inflammatory responses, M...

NF-E2-Related Factor 2 - A basic-leucine zipper transcription factor that was originally described as a transcriptional regul...

NFI Transcription Factors - Transcription factors that were originally identified as site-specific DNA-binding proteins essentia...

NF-kappa B - Ubiquitous, inducible, nuclear transcriptional activator that binds to enhancer elements in many dif...

NF-kappa B p50 Subunit - A component of NF-kappa B transcription factor. It is proteolytically processed from NF-kappa B p105...

NF-kappa B p52 Subunit - A component of NF-kappa B transcription factor. It is proteolytically processed from NF-kappa B p100...

N-Formylmethionine - Effective in the initiation of protein synthesis. The initiating methionine residue enters the ribos...

N-Formylmethionine Leucyl-Phenylalanine - N-Formylmethionyl-leucyl-phenylalanine. A formylated tripeptide originally isolated from bacterial f...

N-Glycosyl Hydrolases - A class of enzymes involved in the hydrolysis of the N-glycosidic bond of nitrogen-linked sugars....

NG-Nitroarginine Methyl Ester - A non-selective inhibitor of nitric oxide synthase. It has been used experimentally to induce hypert...

Niacin - A water-soluble vitamin of the B complex occurring in various animal and plant tissues. It is requir...

Niacinamide - An important compound functioning as a component of the coenzyme NAD. Its primary significance is in...

Nialamide - An MAO inhibitor that is used as an antidepressive agent....

Nicarbazin - An equimolar complex of 4,4'-Dinitrocarbanilide and 2-Hydroxy-4,6-dimethylpyrimidine. A coccidiostat...

Nicardipine - A potent calcium channel blockader with marked vasodilator action. It has antihypertensive propertie...

Nicergoline - An ergot derivative that has been used as a cerebral vasodilator and in peripheral vascular disease....

Niceritrol - An ester of nicotinic acid that lowers cholesterol and triglycerides in total plasma and in the VLD-...

Nickel - A trace element with the atomic symbol Ni, atomic number 28, and atomic weight 58.69. It is a cofact...

Niclofolan - Proposed fasciolacide. Synonyms: Dertil; Bilevon; Bay 9015....

Niclosamide - An antihelmintic that is active against most tapeworms. (From Martindale, The Extra Pharmacopoeia, 3...

Nicorandil - A derivative of the NIACINAMIDE that is structurally combined with an organic nitrate. It is a potas...

Nicotinamidase - An enzyme that catalyzes the hydrolysis of nicotinamide to nicotinate and ammonia. EC 3.5.1.19....

Nicotinamide Mononucleotide - 3-Carbamoyl-1-beta-D-ribofuranosyl pyridinium hydroxide-5'phosphate, inner salt. A nucleotide in whi...

Nicotinamide N-Methyltransferase - An enzyme found primarily in the LIVER that catalyzes the N-methylation of NICOTINAMIDE and other st...

Nicotinamide Phosphoribosyltransferase - An enzyme that catalyzes the formation of nicotinamide mononucleotide (NMN) from nicotinamide and 5-...

Nicotinamide-Nucleotide Adenylyltransferase - An enzyme that catalyzes reversibly the transfer of the adenylyl moiety of ATP to the phosphoryl gro...

Nicotine - Nicotine is highly toxic alkaloid. It is the prototypical agonist at nicotinic cholinergic receptors...

Nicotinic Acids - 2-, 3-, or 4-Pyridinecarboxylic acids. Pyridine derivatives substituted with a carboxy group at the ...

Nicotinic Agonists - Drugs that bind to and activate nicotinic cholinergic receptors (RECEPTORS, NICOTINIC). Nicotinic ag...

Nicotinic Antagonists - Drugs that bind to nicotinic cholinergic receptors (RECEPTORS, NICOTINIC) and block the actions of a...

Nicotinyl Alcohol - Alcohol analog of NICOTINIC ACID which is a direct-acting peripheral vasodilator that causes flushin...

Nictitating Membrane - A fold of the mucous membrane of the CONJUNCTIVA in many animals. At rest, it is hidden in the media...

Nidovirales - An order comprising three families of eukaryotic viruses possessing linear, nonsegmented, positive s...

Nidovirales Infections - Infections with viruses of the order NIDOVIRALES. The concept includes ARTERIVIRUS INFECTIONS and CO...

Niemann-Pick Disease, Type A - The classic infantile form of Niemann-Pick Disease, caused by mutation in SPHINGOMYELIN PHOSPHODIEST...

Niemann-Pick Disease, Type B - An allelic disorder of TYPE A NIEMANN-PICK DISEASE, a late-onset form. It is also caused by mutation...

Niemann-Pick Disease, Type C - An autosomal recessive lipid storage disorder that is characterized by accumulation of CHOLESTEROL a...

Niemann-Pick Diseases - A group of autosomal recessive disorders in which harmful quantities of lipids accumulate in the vis...

Nifedipine - A potent vasodilator agent with calcium antagonistic action. It is a useful anti-anginal agent that ...

Niflumic Acid - An analgesic and anti-inflammatory agent used in the treatment of rheumatoid arthritis....

Nifuratel - Local antiprotozoal and antifungal agent that may also be given orally....

Nifurtimox - A nitrofuran thiazine that has been used against TRYPANOSOMIASIS....

Nigella - A plant genus of the family RANUNCULACEAE....

Nigella damascena - A plant genus of the family RANUNCULACEAE. The name is similar to giant fennel (FERULA), true fennel...

Nigella sativa - A plant genus of the family RANUNCULACEAE that contains alpha-hederin, a triterpene saponin in the s...

Niger - A republic in western Africa, north of NIGERIA and west of CHAD. Its capital is Niamey....

Nigeria - A republic in western Africa, south of NIGER between BENIN and CAMEROON. Its capital is Abuja....

Nigericin - A polyether antibiotic which affects ion transport and ATPase activity in mitochondria. It is produc...

Night Blindness - Failure or imperfection of vision at night or in dim light, with good vision only on bright days. (D...

Night Care - Institutional night care of patients....

Night Terrors - A disorder characterized by incomplete arousals from sleep associated with behavior suggesting extre...

Night Vision - Function of the human eye that is used in dim illumination (scotopic intensities) or at nighttime. S...

NIH 3T3 Cells - A continuous cell line of high contact-inhibition established from NIH Swiss mouse embryo cultures. ...

Nijmegen Breakage Syndrome - A chromosome instability syndrome resulting from a defective response to DNA double-strand breaks. I...

Nikethamide - A central nervous system stimulant. It was formerly used in the treatment of barbiturate overdose bu...

Nimaviridae - A family of DNA invertebrate viruses with one genus: Whispovirus....

Nimodipine - A calcium channel blockader with preferential cerebrovascular activity. It has marked cerebrovascula...

Nimorazole - An antitrichomonal agent which is effective either topically or orally and whose urinary metabolites...

Nimustine - Antineoplastic agent especially effective against malignant brain tumors. The resistance which brain...

Ninhydrin - 2,2-Dihydroxy-1H-indene-1,3-(2H)-dione. Reagent toxic to skin and mucus membranes. It is used in che...

Niobium - Niobium. A metal element atomic number 41, atomic weight 92.906, symbol Nb. (From Dorland, 28th ed)...

Nipah Virus - A species of HENIPAVIRUS, closely related to HENDRA VIRUS, which emerged in Peninsular Malaysia in 1...

Nipple Aspirate Fluid - Fluid collected from nipple by gentle aspiration. The fluid contains cells and extracellular fluid f...

Nipples - The conic organs which usually give outlet to milk from the mammary glands....

Nippostrongylus - A genus of intestinal nematode parasites belonging to the superfamily HELIGMOSOMATOIDEA, which commo...

Niridazole - An antischistosomal agent that has become obsolete....

Nisin - A 34-amino acid polypeptide antibiotic produced by Streptococcus lactis. It has been used as a food ...

Nisoldipine - A dihydropyridine calcium channel antagonist that acts as a potent arterial vasodilator and antihype...

Nissl Bodies - Subcellular structures found in nerve cell bodies and DENDRITES. They consist of granular endoplasmi...

Nitella - A genus of ALGAE in the family CHARACEAE. They are found in shallow to deep waters of soft water or ...

Nitracrine - Acridine antineoplastic agent used in mammary and ovarian tumors. It inhibits RNA synthesis....

Nitrate Reductase - An enzyme that catalyzes the oxidation of nitrite to nitrate. It is a cytochrome protein that contai...

Nitrate Reductase (NAD(P)H) - An iron-sulfur and MOLYBDENUM containing FLAVOPROTEIN that catalyzes the oxidation of nitrite to nit...

Nitrate Reductase (NADH) - An NAD-dependent enzyme that catalyzes the oxidation of nitrite to nitrate. It is a FLAVOPROTEIN tha...

Nitrate Reductase (NADPH) - An enzyme that catalyzes the oxidation of nitrite to nitrate in the presence of NADP+. It is a FLAVO...

Nitrate Reductases - Oxidoreductases that are specific for the reduction of NITRATES....

Nitrates - Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- radical....

Nitrazepam - A benzodiazepine derivative used as an anticonvulsant and hypnotic....

Nitrendipine - A calcium channel blocker with marked vasodilator action. It is an effective antihypertensive agent ...

Nitrergic Neurons - Nerve cells where transmission is mediated by NITRIC OXIDE....

Nitric Acid - Nitric acid (HNO3). A colorless liquid that is used in the manufacture of inorganic and organic nitr...

Nitric Oxide - A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE ...

Nitric Oxide Donors - A diverse group of agents, with unique chemical structures and biochemical requirements, which gener...

Nitric Oxide Synthase - An NADPH-dependent enzyme that catalyzes the conversion of L-ARGININE and OXYGEN to produce CITRULLI...

Nitric Oxide Synthase Type I - A CALCIUM-dependent, constitutively-expressed form of nitric oxide synthase found primarily in NERVE...

Nitric Oxide Synthase Type II - A CALCIUM-independent subtype of nitric oxide synthase that may play a role in immune function. It i...

Nitric Oxide Synthase Type III - A CALCIUM-dependent, constitutively-expressed form of nitric oxide synthase found primarily in ENDOT...

Nitriles - Organic compounds containing the -CN radical. The concept is distinguished from CYANIDES, which deno...

Nitrilotriacetic Acid - A derivative of acetic acid, N(CH2COOH)3. It is a complexing (sequestering) agent that forms stable ...

Nitrite Reductase (NAD(P)H) - An enzyme found primarily in BACTERIA and FUNGI that catalyzes the oxidation of ammonium hydroxide t...

Nitrite Reductases - A group of enzymes that oxidize diverse nitrogenous substances to yield nitrite. (Enzyme Nomenclatur...

Nitrites - Salts of nitrous acid or compounds containing the group NO2-. The inorganic nitrites of the type MNO...

Nitro Compounds - Compounds having the nitro group, -NO2, attached to carbon. When attached to nitrogen they are nitra...

Nitroanisole O-Demethylase - Oxidative enzyme which transforms p-nitroanisole into p-nitrophenol....

Nitroarginine - An inhibitor of nitric oxide synthetase which has been shown to prevent glutamate toxicity. Nitroarg...

Nitrobacter - A genus of gram-negative, rod-shaped bacteria that oxidizes nitrites to nitrates. Its organisms occu...

Nitrobenzoates - Benzoic acid or benzoic acid esters substituted with one or more nitro groups....

Nitroblue Tetrazolium - Colorless to yellow dye that is reducible to blue or black formazan crystals by certain cells; forme...

Nitrofurantoin - A urinary anti-infective agent effective against most gram-positive and gram-negative organisms. Alt...

Nitrofurazone - A topical anti-infective agent effective against gram-negative and gram-positive bacteria. It is use...

Nitrogen - An element with the atomic symbol N, atomic number 7, and atomic weight 14. Nitrogen exists as a dia...

Nitrogen Compounds - Inorganic compounds that contain nitrogen as an integral part of the molecule....

Nitrogen Dioxide - Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only ...

Nitrogen Fixation - The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to bi...

Nitrogen Isotopes - Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic...

Nitrogen Mustard Compounds - A group of alkylating agents derived from mustard gas, with the sulfur replaced by nitrogen. They we...

Nitrogen Oxides - Inorganic oxides that contain nitrogen....

Nitrogen Radioisotopes - Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic wei...

Nitrogenase - An enzyme system that catalyzes the fixing of nitrogen in soil bacteria and blue-green algae (CYANOB...

Nitrogenous Group Transferases - Enzymes that catalyze the transfer of nitrogenous groups, primarily amino groups, from a donor, gene...

Nitroglycerin - A volatile vasodilator which relieves ANGINA PECTORIS by stimulating GUANYLATE CYCLASE and lowering ...

Nitrohydroxyiodophenylacetate - Also called 4-hydroxy-3-iodo-5-nitrophenylacetate. A haptenic determinant that can be radiolabeled a...

Nitromifene - A non-steroidal estrogen antagonist (as the 1:1 citrate) most commonly used as a research tool in an...

Nitrophenylgalactosides - Includes ortho-, meta-, and para-nitrophenylgalactosides....

Nitroprusside - A powerful vasodilator used in emergencies to lower blood pressure or to improve cardiac function. I...

Nitroquinolines - Quinolines substituted in any position by one or more nitro groups....

Nitroreductases - Enzymes which reduce nitro groups (NITRO COMPOUNDS) and other nitrogenous compounds....

Nitrosamines - A class of compounds that contain a -NH2 and a -NO radical. Many members of this group have carcinog...

Nitrosation - Conversion into nitroso compounds. An example is the reaction of nitrites with amino compounds to fo...

Nitrosomethylurethane - An alkylating carcinogen that produces gastrointestinal and probably lung and nervous system tumors....

Nitrosomonadaceae - A family of gram-negative nitrifying bacteria, in the order Nitrosomonadales, class BETAPROTEOBACTER...

Nitrosomonas - A genus of gram-negative, ellipsoidal or rod-shaped bacteria whose major source of energy and reduci...

Nitrosomonas europaea - The type species of the genus NITROSOMONAS, a gram-negative chemolithotroph that oxidizes ammonia to...

Nitrous Acid - Nitrous acid (HNO2). A weak acid that exists only in solution. It can form water-soluble nitrites an...

Nitrous Oxide - Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High co...

Nitrovin - An antibacterial growth promoter used in animal feeds....

Nitroxinil - Proposed anthelmintic for fasciola and liver fluke infestations....

Nizatidine - A histamine H2 receptor antagonist with low toxicity that inhibits gastric acid secretion. The drug ...

NK Cell Lectin-Like Receptor Subfamily A - An inhibitory subclass of NK cell lectin-like receptors that interacts with CLASS I MAJOR HISTOCOMPA...

NK Cell Lectin-Like Receptor Subfamily B - A subclass of NK cell lectin-like receptors that includes both inhibitory and stimulatory members....

NK Cell Lectin-Like Receptor Subfamily C - A subclass of NK cell lectin-like receptors that associates with members of NK CELL LECTIN-LIKE RECE...

NK Cell Lectin-Like Receptor Subfamily D - A subclass of NK cell lectin-like receptors that associates with a variety of members of NK CELL LEC...

NK Cell Lectin-Like Receptor Subfamily K - An activating NK cell lectin-like receptor subfamily that regulates immune responses to INFECTION an...

NM23 Nucleoside Diphosphate Kinases - A family of nucleotide diphosphate kinases that play a role in a variety of cellular signaling pathw...

N-Methyl-3,4-methylenedioxyamphetamine - An N-substituted amphetamine analog. It is a widely abused drug classified as a hallucinogen and cau...

N-Methylaspartate - An amino acid that, as the D-isomer, is the defining agonist for the NMDA receptor subtype of glutam...

N-Methylscopolamine - A muscarinic antagonist used to study binding characteristics of muscarinic cholinergic receptors....

N-Nitrosopyrrolidine - Carcinogenic nitrosamine that may be formed from preservatives in meats during their preparation or ...

Nobelium - Nobelium. A man-made radioactive element of the actinide metal series. It has the atomic symbol No, ...

Noble Gases - Elements that constitute group 18 (formerly the zero group) of the periodic table. They are gases th...

Nocardia - A genus of gram-positive, aerobic bacteria whose species are widely distributed and are abundant in ...

Nocardia asteroides - A species of bacterium of the family NOCARDIACEAE, producing pulmonary infections in man....

Nocardia Infections - Infections with bacteria of the genus NOCARDIA....

Nocardiaceae - A family of gram-positive, aerobic actinomycetes found in soil and animal tissue. Some species are t...

Nociceptors - Peripheral AFFERENT NEURONS which are sensitive to injuries or pain, usually caused by extreme therm...

Nocodazole - Nocodazole is an antineoplastic agent which exerts its effect by depolymerizing microtubules....

Nocturia - Frequent URINATION at night that interrupts sleep. It is often associated with outflow obstruction, ...

Nocturnal Enuresis - Involuntary discharge of URINE during sleep at night after expected age of completed development of ...

Nocturnal Myoclonus Syndrome - Excessive periodic leg movements during sleep that cause micro-arousals and interfere with the maint...

Nocturnal Paroxysmal Dystonia - A parasomnia characterized by paroxysmal episodes of choreoathetotic, ballistic, dystonic movements,...

Nod Signaling Adaptor Proteins - Cytosolic signaling adaptor proteins that were initially discovered by their role in the innate immu...

Nod1 Signaling Adaptor Protein - A NOD-signaling adaptor protein that contains a C-terminal leucine-rich domain which recognizes bact...

Nod2 Signaling Adaptor Protein - A NOD signaling adaptor protein that contains two C-terminal leucine-rich domains which recognize ba...

Nodal Protein - The founding member of the nodal signaling ligand family of proteins. Nodal protein was originally d...

Nodal Signaling Ligands - Members of the transforming growth factor superfamily that play a role in pattern formation and diff...

Nodaviridae - A family of RNA viruses infecting insects and fish. There are two genera: Alphanodavirus and Betanod...

Nodose Ganglion - The inferior (caudal) ganglion of the vagus (10th cranial) nerve. The unipolar nodose ganglion cells...

Nodularia - A form-genus of filamentous CYANOBACTERIA in the order Nostocales. Its members can be planktonic or ...

Nogalamycin - An anthrocycline from a Streptomyces nogalater variant. It is a cytolytic antineoplastic that inhibi...

Noise - Any sound which is unwanted or interferes with HEARING other sounds....

Noise, Occupational - Noise present in occupational, industrial, and factory situations....

Noise, Transportation - Noise associated with transportation, particularly aircraft and automobiles....

Noma - A severe gangrenous process occurring predominantly in debilitated and malnourished children, especi...

Nomifensine - An isoquinoline derivative that prevents dopamine reuptake into synaptosomes. The maleate was former...

Nomograms - Graphical representation of a statistical model containing scales for calculating the prognostic wei...

Nonachlazine - Coronary vasodilator with a novel mechanism of action; proposed as antianginal agent....

Nondirective Therapy - A procedure in which the therapist refrains from directing the client, but instead reflects back to ...

Nondisjunction, Genetic - The failure of homologous CHROMOSOMES or CHROMATIDS to segregate during MITOSIS or MEIOSIS with the ...

Non-Fibrillar Collagens - A family of structurally-related short-chain collagens that do not form large fibril bundles....

Nonheme Iron Proteins - Proteins, usually acting in oxidation-reduction reactions, containing iron but no porphyrin groups. ...

Nonlinear Dynamics - The study of systems which respond disproportionately (nonlinearly) to initial conditions or perturb...

Nonmuscle Myosin Type IIA - A nonmuscle isoform of myosin type II found predominantly in platelets, lymphocytes, neutrophils and...

Nonmuscle Myosin Type IIB - A nonmuscle isoform of myosin type II found predominantly in neuronal tissue....

Nonodontogenic Cysts - Cysts formed from epithelial inclusions in the lines of fusion of the embryonic processes which form...

Nonoxynol - Nonionic surfactant mixtures varying in the number of repeating ethoxy (oxy-1,2-ethanediyl) groups. ...

Nonprescription Drugs - Medicines that can be sold legally without a DRUG PRESCRIPTION....

Nonsuppressible Insulin-Like Activity - A blood protein (NSILA) which mimics the biological activity of insulin in serum, but is not suppres...

Nontherapeutic Human Experimentation - Human experimentation that is not intended to benefit the subjects on whom it is performed. Phase I ...

Nonverbal Communication - Transmission of emotions, ideas, and attitudes between individuals in ways other than the spoken lan...

No-Observed-Adverse-Effect Level - The highest dosage administered that does not produce toxic effects. The NOAEL will depend on how cl...

Noonan Syndrome - A multifaceted disorder characterized by short stature, webbed neck, ptosis, skeletal malformations,...

Nootropic Agents - Drugs used to specifically facilitate learning or memory, particularly to prevent the cognitive defi...

Norandrostanes - Androstanes in which ring contractions have occurred or which are lacking carbon-18. Compounds with ...

Nordazepam - An intermediate in the metabolism of DIAZEPAM to OXAZEPAM. It may have actions similar to those of d...

Nordefrin - A norepinephrine derivative used as a vasoconstrictor agent....

Nordihydroguaiaretic Acid - A potent lipoxygenase inhibitor that interferes with arachidonic acid metabolism. The compound also ...

No-Reflow Phenomenon - Markedly reduced or absent REPERFUSION in an infarct zone following the removal of an obstruction or...

Norepinephrine - Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and aut...

Norepinephrine Plasma Membrane Transport Proteins - Sodium chloride-dependent neurotransmitter symporters located primarily on the PLASMA MEMBRANE of no...

Norethandrolone - A synthetic hormone with anabolic and androgenic properties and moderate progestational activity....

Norethindrone - A synthetic progestational hormone with actions similar to those of PROGESTERONE but functioning as ...

Norethynodrel - A synthetic progestational hormone with actions and uses similar to those of PROGESTERONE. It has be...

Norfenfluramine - A FENFLURAMINE analog that inhibits serotonin uptake and may provoke release of serotonin. It is use...

Norfloxacin - A synthetic fluoroquinolone (FLUOROQUINOLONES) with broad-spectrum antibacterial activity against mo...

Norgestrel - A synthetic progestational agent with actions similar to those of PROGESTERONE. This racemic or (+-)...

Norgestrienone - A synthetic steroid with progestational and contraceptive activities....

Norisoprenoids - Thirteen-carbon butene cyclohexene degradation products formed by the cleavage of CAROTENOIDS. They ...

Norleucine - An unnatural amino acid that is used experimentally to study protein structure and function. It is s...

Normal Distribution - Continuous frequency distribution of infinite range. Its properties are as follows: 1, continuous, s...

Normetanephrine - A methylated metabolite of norepinephrine that is excreted in the urine and found in certain tissues...

Norovirus - A genus in the family CALICIVIRIDAE, associated with epidemic GASTROENTERITIS in humans. The type sp...

Norpregnadienes - Pregnadienes which have undergone ring contractions or are lacking carbon-18 or carbon-19....

Norpregnanes - Pregnanes which have undergone ring contractions or are lacking carbon-18 or carbon-19. Unsaturation...

Norpregnatrienes - Pregnatrienes which have undergone ring contractions or are lacking carbon-18 or carbon-19....

Norpregnenes - Pregnenes with one double bond or more than three double bonds which have undergone ring contraction...

Norprogesterones - Progesterones which have undergone ring contraction or which are lacking carbon 18 or 19....

Norsteroids - Steroids which have undergone contraction in ring size or reduction in side chains....

Northern Territory - Territory in north central Australia, between the states of Queensland and Western Australia. Its ca...

Northwest Territories - A federally administered division of Canada. Its capital is Yellowknife. The former northern and eas...

Northwestern United States - The geographic area of the northwestern region of the United States. The states usually included in ...

Nortriptyline - A metabolite of AMITRIPTYLINE that is also used as an antidepressive agent. Nortriptyline is used in...

Norwalk virus - The type species in the genus NOROVIRUS, first isolated in 1968 from the stools of school children i...

Noscapine - A naturally occurring opium alkaloid that is a centrally acting antitussive agent....

Nose - A part of the upper respiratory tract. It contains the organ of SMELL. The term includes the externa...

Nose Deformities, Acquired - Abnormalities of the nose acquired after birth from injury or disease....

Nose Diseases - Disorders of the nose, general or unspecified....

Nose Neoplasms - Tumors or cancer of the NOSE....

Nosema - A genus of parasitic FUNGI in the family Nosematidae. Some species are pathogenic for invertebrates ...

Nostoc - A form-genus of CYANOBACTERIA in the order Nostocales. Trichomes composed of spherical or ovoid vege...

Nostoc commune - A form species of spore-producing CYANOBACTERIA, in the family Nostocaceae, order Nostocales. It is ...

Nostoc muscorum - A form-species of nitrogen-fixing CYANOBACTERIA, in the family Nostocaceae, order Nostocales....

Nostrums - Medicines whose effectiveness is unproven and whose ingredients are often secret....

Notochord - A cartilaginous rod of mesodermal cells at the dorsal midline of all CHORDATE embryos. In lower vert...

Notophthalmus - A genus of newts of the Salamandridae family found in North America in areas east of the 100th merid...

Notophthalmus viridescens - A species of newt in the Salamandridae family in which the larvae transform into terrestrial eft sta...

Nova Scotia - A province of eastern Canada, one of the Maritime Provinces with NEW BRUNSWICK; PRINCE EDWARD ISLAND...

Novirhabdovirus - A genus in the family RHABDOVIRIDAE, infecting numerous species of fish with broad geographic distri...

Novobiocin - An antibiotic compound derived from Streptomyces niveus. It has a chemical structure similar to coum...

Noxae - Agents capable of exerting a harmful effect on the body....

Noxythiolin - Local antibacterial that probably acts by releasing formaldehyde in aqueous solutions. It is used fo...

N-substituted Glycines - AMINO ACIDS composed of GLYCINE substituted at the nitrogen rather than the usual carbon position, r...

Nuchal Cord - A complication of pregnancy in which the UMBILICAL CORD wraps around the fetal neck once or multiple...

Nuchal Translucency Measurement - A prenatal ultrasonic measurement of the thickness or translucent area below the SKIN in the back of...

Nuclear Cap-Binding Protein Complex - A heterodimeric protein complex of RNA cap-binding proteins, which binds with high affinity to the 5...

Nuclear Energy - Energy released by nuclear fission or nuclear fusion....

Nuclear Envelope - The membrane system of the CELL NUCLEUS that surrounds the nucleoplasm. It consists of two concentr...

Nuclear Export Signals - Specific amino acid sequences present in the primary amino acid sequence of proteins which mediate t...

Nuclear Factor 45 Protein - A protein subunit that takes part in forming nuclear factor 90 protein complexes....

Nuclear Factor 90 Proteins - A family of double-stranded RNA-binding proteins that are related to NFATC TRANSCRIPTION FACTORS. In...

Nuclear Family - A family composed of spouses and their children....

Nuclear Fission - Nuclear reaction in which the nucleus of a heavy atom such as uranium or plutonium is split into two...

Nuclear Fusion - Thermonuclear reaction in which the nuclei of an element of low atomic weight unite under extremely ...

Nuclear Lamina - A lattice of fibrils which covers the entire inner surface of the nuclear envelope and interlinks nu...

Nuclear Localization Signals - Short, predominantly basic amino acid sequences identified as nuclear import signals for some protei...

Nuclear Magnetic Resonance, Biomolecular - NMR spectroscopy on small- to medium-size biological macromolecules. This is often used for structur...

Nuclear Matrix - The residual framework structure of the CELL NUCLEUS that maintains many of the overall architectura...

Nuclear Matrix-Associated Proteins - A broad category of nuclear proteins that are components of or participate in the formation of the N...

Nuclear Medicine - A specialty field of radiology concerned with diagnostic, therapeutic, and investigative use of radi...

Nuclear Medicine Department, Hospital - Hospital department responsible for the administration and management of nuclear medicine services....

Nuclear Physics - The study of the characteristics, behavior, and internal structures of the atomic nucleus and its in...

Nuclear Pore - An opening through the NUCLEAR ENVELOPE formed by the nuclear pore complex which transports nuclear ...

Nuclear Pore Complex Proteins - Proteins that form the structure of the NUCLEAR PORE. They are involved in active, facilitated and p...

Nuclear Power Plants - Facilities that convert NUCLEAR ENERGY into electrical energy....

Nuclear Proteins - Proteins found in the nucleus of a cell. Do not confuse with NUCLEOPROTEINS which are proteins conju...

Nuclear Reactors - Devices containing fissionable material in sufficient quantity and so arranged as to be capable of m...

Nuclear Receptor Coactivator 1 - A nuclear receptor coactivator with specificity for ESTROGEN RECEPTORS; PROGESTERONE RECEPTORS; and ...

Nuclear Receptor Coactivator 2 - A transcription factor that partners with ligand bound GLUCOCORTICOID RECEPTORS and ESTROGEN RECEPTO...

Nuclear Receptor Coactivator 3 - A nuclear receptor coactivator with specificity for ESTROGEN RECEPTORS and PROGESTERONE RECEPTORS. I...

Nuclear Receptor Coactivators - Proteins that enhance gene expression when associated with ligand bound activated NUCLEAR RECEPTORS....

Nuclear Receptor Co-Repressor 1 - A nuclear protein that regulates the expression of genes involved in a diverse array of processes re...

Nuclear Receptor Co-Repressor 2 - A nuclear co-repressor protein that shows specificity for RETINOIC ACID RECEPTORS and THYROID HORMON...

Nuclear Receptor Subfamily 1, Group D, Member 1 - A DNA-binding orphan nuclear receptor that negatively regulates expression of ARNTL TRANSCRIPTION FA...

Nuclear Receptor Subfamily 1, Group F, Member 1 - A DNA-binding orphan nuclear receptor that positively regulates expression of ARNTL TRANSCRIPTION FA...

Nuclear Receptor Subfamily 1, Group F, Member 2 - An orphan nuclear receptor that is expressed at high levels in neuronal tissues, the RETINA; EPIDIDY...

Nuclear Receptor Subfamily 1, Group F, Member 3 - An orphan nuclear receptor found in the THYMUS where it plays a role in regulating the development a...

Nuclear Receptor Subfamily 2, Group C, Member 1 - A DNA-binding orphan nuclear receptor that has specificity for directly repeated (DR) AGGTCA sequenc...

Nuclear Receptor Subfamily 2, Group C, Member 2 - An orphan nuclear receptor that has specificity for hormone response elements found in the promoters...

Nuclear Receptor Subfamily 4, Group A, Member 1 - An orphan nuclear receptor that is closely related to members of the thyroid-steroid receptor gene f...

Nuclear Receptor Subfamily 4, Group A, Member 2 - An orphan nuclear receptor that is found at high levels in BRAIN tissue. The protein is believed to ...

Nuclear Receptor Subfamily 4, Group A, Member 3 - An orphan nuclear receptor that is closely related to members of the thyroid-steroid receptor family...

Nuclear Receptor Subfamily 6, Group A, Member 1 - An orphan nuclear receptor expressed mainly in the GERM CELLS of GONADS. It functions as a transcrip...

Nuclear Reprogramming - The process that reverts CELL NUCLEI of fully differentiated somatic cells to a pluripotent or totip...

Nuclear Respiratory Factor 1 - A transcription factor that controls the expression of variety of proteins including CYTOCHROME C an...

Nuclear Respiratory Factors - A family of transcription factors that control expression of a variety of nuclear GENES encoding pro...

Nuclear Transfer Techniques - Methods of implanting a CELL NUCLEUS from a donor cell into an enucleated acceptor cell. Often the n...

Nuclear Warfare - Warfare involving the use of NUCLEAR WEAPONS....

Nuclear Weapons - A weapon that derives its destructive force from nuclear fission and/or fusion....

Nuclease Protection Assays - Techniques for measuring specific nucleic acid interaction with another nucleic acid or with a prote...

Nucleic Acid Amplification Techniques - Laboratory techniques that involve the in-vitro synthesis of many copies of DNA or RNA from one orig...

Nucleic Acid Conformation - The spatial arrangement of the atoms of a nucleic acid or polynucleotide that results in its charact...

Nucleic Acid Denaturation - Disruption of the secondary structure of nucleic acids by heat, extreme pH or chemical treatment. Do...

Nucleic Acid Heteroduplexes - Double-stranded nucleic acid molecules (DNA-DNA or DNA-RNA) which contain regions of nucleotide mism...

Nucleic Acid Hybridization - Widely used technique which exploits the ability of complementary sequences in single-stranded DNAs ...

Nucleic Acid Precursors - Use for nucleic acid precursors in general or for which there is no specific heading....

Nucleic Acid Probes - Nucleic acid which complements a specific mRNA or DNA molecule, or fragment thereof; used for hybrid...

Nucleic Acid Renaturation - The reformation of all, or part of, the native conformation of a nucleic acid molecule after the mol...

Nucleic Acid Synthesis Inhibitors - Compounds that inhibit cell production of DNA or RNA....

Nucleic Acids - High molecular weight polymers containing a mixture of purine and pyrimidine nucleotides chained tog...

Nucleic Acids, Nucleotides, and Nucleosides - Complex compounds of high molecular weight occurring in living cells. These are basically of two typ...

Nucleobase Transport Proteins - Proteins involved in the transport of nucleobases such as PYRIMIDINES and PURINES across membranes....

Nucleobase, Nucleoside, Nucleotide, and Nucleic Acid Transport Proteins - A broad class of proteins involved in the transport of nucleobases, NUCLEOSIDES; NUCLEOTIDES; and NU...

Nucleocapsid - A protein-nucleic acid complex which forms part or all of a virion. It consists of a CAPSID plus enc...

Nucleocapsid Proteins - Viral proteins found in either the NUCLEOCAPSID or the viral core (VIRAL CORE PROTEINS)....

Nucleocytoplasmic Transport Proteins - Proteins involved in the process of transporting molecules in and out the cell nucleus. Included her...

Nucleolus Organizer Region - The chromosome region which is active in nucleolus formation and which functions in the synthesis of...

Nucleoplasmins - A family of histone molecular chaperones that play roles in sperm CHROMATIN decondensation and CHROM...

Nucleopolyhedrovirus - A genus of the family BACULOVIRIDAE, subfamily Eubaculovirinae, characterized by the formation of cr...

Nucleoproteins - Proteins conjugated with nucleic acids....

Nucleoside Deaminases - Catalyze the hydrolysis of nucleosides with the elimination of ammonia....

Nucleoside Q - A modified nucleoside which is present in the first position of the anticodon of tRNA-tyrosine, tRNA...

Nucleoside Transport Proteins - Proteins involved in the transport of NUCLEOSIDES across cellular membranes....

Nucleoside-Diphosphate Kinase - An enzyme that is found in mitochondria and in the soluble cytoplasm of cells. It catalyzes reversib...

Nucleoside-Phosphate Kinase - An enzyme that catalyzes reversible reactions of a nucleoside triphosphate, e.g., ATP, with a nucleo...

Nucleosides - Purine or pyrimidine bases attached to a ribose or deoxyribose. (From King & Stansfield, A Dictionar...

Nucleoside-Triphosphatase - An enzyme which catalyzes the hydrolysis of nucleoside triphosphates to nucleoside diphosphates. It ...

Nucleosome Assembly Protein 1 - A histone chaperone that facilitates nucleosome assembly by mediating the formation of the histone o...

Nucleosomes - The repeating structural units of chromatin, each consisting of approximately 200 base pairs of DNA ...

Nucleotidases - A class of enzymes that catalyze the conversion of a nucleotide and water to a nucleoside and orthop...

Nucleotide Deaminases - Catalyze the hydrolysis of nucleotides with the elimination of ammonia....

Nucleotide Mapping - Two-dimensional separation and analysis of nucleotides....

Nucleotide Transport Proteins - Proteins involved in the transport of NUCLEOTIDES across cellular membranes....

Nucleotides - The monomeric units from which DNA or RNA polymers are constructed. They consist of a purine or pyri...

Nucleotidyltransferases - A class of enzymes that transfers nucleotidyl residues. EC 2.7.7....

Nucleus Accumbens - Collection of pleomorphic cells in the caudal part of the anterior horn of the lateral ventricle, in...

Nudism - The practice of living unclothed for reasons of comfort or health....

Numerical Analysis, Computer-Assisted - Computer-assisted study of methods for obtaining useful quantitative solutions to problems that have...

Numismatics - Study of coins, tokens, medals, etc. However, it usually refers to medals pertaining to the history ...

Nunavut - A self-governing territory formed from the central and eastern portions of the Northwest Territories...

Nuphar - A plant genus of the family NYMPHAEACEAE. Members contain sesquiterpene thioalkaloids....

Nurse Administrators - Nurses professionally qualified in administration....

Nurse Anesthetists - Professional nurses who have completed postgraduate training in the administration of anesthetics an...

Nurse Clinicians - Registered nurses who hold Master's degrees in nursing with an emphasis in clinical nursing and who ...

Nurse Midwives - Professional nurses who have received postgraduate training in midwifery....

Nurse Practitioners - Nurses who are specially trained to assume an expanded role in providing medical care under the supe...

Nurse-Patient Relations - Interaction between the patient and nurse....

Nurseries - Facilities which provide care for infants....

Nurseries, Hospital - Hospital facilities which provide care for newborn infants....

Nurses - Professionals qualified by education at an accredited school of nursing and licensed by state law to...

Nurses' Aides - Allied health personnel who assist the professional nurse in routine duties....

Nurses' Instruction - Works consisting of materials developed for a nursing audience....

Nurse's Practice Patterns - Patterns of practice in nursing related to provision of services including diagnosis and treatment....

Nurse's Role - The expected function of a member of the nursing profession....

Nurses, Male - Nurses of the male sex....

Nursing - The field of nursing care concerned with the promotion, maintenance, and restoration of health....

Nursing Administration Research - Research concerned with establishing costs of nursing care, examining the relationships between nurs...

Nursing Assessment - Evaluation of the nature and extent of nursing problems presented by a patient for the purpose of pa...

Nursing Audit - A detailed review and evaluation of selected clinical records by qualified professional personnel fo...

Nursing Care - Care given to patients by nursing service personnel....

Nursing Diagnosis - Conclusions derived from the nursing assessment that establish a health status profile for the patie...

Nursing Education Research - Investigations into the problems of integrating research findings into nursing curricula, developing...

Nursing Evaluation Research - Research carried out by nurses that uses interviews, data collection, observation, surveys, etc., to...

Nursing Faculty Practice - Clinical practice by members of the nursing faculty in order to maintain a balance in their nursing ...

Nursing Homes - Facilities which provide nursing supervision and limited medical care to persons who do not require ...

Nursing Informatics - The field of information science concerned with the analysis and dissemination of data through the a...

Nursing Methodology Research - Research carried out by nurses concerning techniques and methods to implement projects and to docume...

Nursing Process - The sum total of nursing activities which includes assessment (identifying needs), intervention (min...

Nursing Records - Data recorded by nurses concerning the nursing care given to the patient, including judgment of the ...

Nursing Research - Research carried out by nurses, generally in clinical settings, in the areas of clinical practice, e...

Nursing Service, Hospital - The hospital department which is responsible for the organization and administration of nursing acti...

Nursing Services - A general concept referring to the organization and administration of nursing activities....

Nursing Staff - Personnel who provide nursing service to patients in an organized facility, institution, or agency....

Nursing Staff, Hospital - Personnel who provide nursing service to patients in a hospital....

Nursing Theory - Concepts, definitions, and propositions applied to the study of various phenomena which pertain to n...

Nursing, Practical - The practice of nursing by licensed, non-registered persons qualified to provide routine care to the...

Nursing, Private Duty - The practice of nursing by a registered or licensed nurse to care for a specific patient in a health...

Nursing, Supervisory - Administration of nursing services for one or more clinical units....

Nursing, Team - Coordination of nursing services by various nursing care personnel under the leadership of a profess...

Nut Hypersensitivity - Allergic reaction to tree nuts that is triggered by the immune system....

Nutrigenomics - The study of the relationship between NUTRITIONAL PHYSIOLOGY and genetic makeup. It includes the eff...

Nutrition Assessment - Evaluation and measurement of nutritional variables in order to assess the level of nutrition or the...

Nutrition Disorders - Disorders caused by nutritional imbalance, either overnutrition or undernutrition....

Nutrition Policy - Governmental guidelines and objectives pertaining to public food supply and nutrition including reco...

Nutrition Processes - Biological actions and events that constitute the steps by which living organisms take in and assimi...

Nutrition Surveys - A systematic collection of factual data pertaining to the nutritional status of a human population w...

Nutrition Therapy - Improving health status of an individual by adjusting the quantities, qualities, and methods of nutr...

Nutritional and Metabolic Diseases - A collective term for nutritional disorders resulting from poor absorption or nutritional imbalance,...

Nutritional Physiological Phenomena - The processes and properties of living organisms by which they take in and balance the use of nutrit...

Nutritional Requirements - The amounts of various substances in food needed by an organism to sustain healthy life....

Nutritional Sciences - The study of NUTRITION PROCESSES as well as the components of food, their actions, interaction, and ...

Nutritional Status - State of the body in relation to the consumption and utilization of nutrients....

Nutritional Support - The administration of nutrients for assimilation and utilization by a patient by means other than no...

Nutritive Value - An indication of the contribution of a food to the nutrient content of the diet. This value depends ...

Nuts - Botanically, a type of single-seeded fruit in which the pericarp enclosing the seed is a hard woody ...

Nyctaginaceae - A plant family of the order Caryophyllales, subclass Caryophyllidae, class Magnoliopsida....

Nylidrin - A beta-adrenergic agonist. Nylidrin causes peripheral vasodilation, a positive inotropic effect, and...

Nylons - Polymers where the main polymer chain comprises recurring amide groups. These compounds are generall...

Nymph - The immature stage in the life cycle of those orders of insects characterized by gradual metamorphos...

Nymphaea - A plant genus of the family NYMPHAEACEAE. The common name of lotus is also used for LOTUS and NELUMB...

Nymphaeaceae - The sour gum plant family of the order Nymphaeales, subclass Magnoliidae, class Magnoliopsida. All h...

Nyssa - A plant genus of the family NYSSACEAE (or Cornaceae by some)....

Nyssaceae - A plant family of the order Cornales, subclass Rosidae, class Magnoliopsida. Some botanical classif...

Nystagmus, Congenital - Nystagmus present at birth or caused by lesions sustained in utero or at the time of birth. It is us...

Nystagmus, Optokinetic - Normal nystagmus produced by looking at objects moving across the field of vision....

Nystagmus, Pathologic - Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus ...

Nystagmus, Physiologic - Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring ...

Nystatin - Macrolide antifungal antibiotic complex produced by Streptomyces noursei, S. aureus, and other Strep...

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