| nonpolar amino acid | An alpha-amino acid in which the functional group attached to the alpha-carbon (i.e., R in RCH(NH2)COOH) has hydrophobic properties; e.g., valine, leucine, alpha-aminobutyrate. (05 Mar 2000) |
|---|---|
| nonpolar compound | A compound composed of molecules that possess a symmetrical distribution of charge, so that no positive or negative poles exist, and that are not ionizable in solution; e.g., hydrocarbons. See: organic compound. (05 Mar 2000) |
| nonpolar group | <chemistry> Group in which the electronic charge density is essentially uniform and that cannot therefore interact with other groups by forming hydrogen bonds or by strong dipole dipole interactions. In an aqueous environment, nonpolar groups tend to cluster together, providing a major force for the folding of macromolecules and formation of membranes. Clusters are formed chiefly because they cause a smaller increase in water structure (decrease in entropy) than dispersed groups. Nonpolar groups interact with each other only by the relatively weak London van der Waals forces. (12 Mar 1998) |
| nonpolar solvents | Organic liquids notable for their ability to dissolve lipids; usually, but not always, immiscible in water; e.g., diethyl ether, carbon tetrachloride. Synonym: nonpolar solvents. (05 Mar 2000) |
| nonprecipitable antibody | Antibody that, under conditions normally employed in precipitin tests, is refractory to precipitation by specific antibody, demonstrable when antigen is added serially in small amounts; nonprecipitating antibody will precipitate under special conditions such as addition of complement. Synonym: nonprecipitable antibody. (05 Mar 2000) |
| nonprecipitating antibody | Antibody that, under conditions normally employed in precipitin tests, is refractory to precipitation by specific antibody, demonstrable when antigen is added serially in small amounts; nonprecipitating antibody will precipitate under special conditions such as addition of complement. Synonym: nonprecipitable antibody. (05 Mar 2000) |
| nonproprietary name | A short name (often called a generic name) of a chemical, drug, or other substance that is not subject to trademark (proprietary) rights but is, in contrast to a trivial name, recognised or recommended by government agencies (e.g., Federal Food and Drug Administration) and by quasi-official organizations (e.g., U.S. Adopted Names Council) for general public use. Like a proprietary name, it is almost always a coined designation derived without using set criteria. Compare: trivial name, proprietary name, semisystematic name, systematic name. (05 Mar 2000) |
| nonprotein nitrogen | The nitrogen content of other than protein bodies; e.g., about one-half the nonprotein nitrogen in the blood is contained in urea. Synonym: rest nitrogen. (05 Mar 2000) |
| nonproteogenic | Not leading to the production of proteins. (05 Mar 2000) |
| nonrandom mating | Selection of a mate with preference for (or aversion to) a particular genotype, i.e., nonrandom mating. Synonym: nonrandom mating. (05 Mar 2000) |
| nonreactive depression | <psychiatry> A clinical syndrome that includes a persistent sad mood or loss of interest in activities that persists for at least 2 weeks in the absence of external precipitants. This should not be confused with a grief reaction (death of loved one). Features may include change in eating habits, insomnia, early morning wakening, lack of interest, depressed mood, fatigue and suicidal thoughts. (12 Mar 1998) |
| nonrebreathing anaesthesia | A technique for inhalation anaesthesia in which valves exhaust all exhaled air from the circuit. (05 Mar 2000) |
| nonrebreathing mask | A mask fitted with both an inhalation valve and an exhalation valve so that all exhaled gas is vented to the external atmosphere and inhaled gas comes only from a reservoir connected to the mask. (05 Mar 2000) |
| nonrebreathing valve | A type of valve that prevents mixture of inhaled and exhaled gases. (05 Mar 2000) |
| nonreceptor protein tyrosine kinase | <enzyme> Kinases that phosphorylate protein tyrosine residues. These kinases play major roles in mitogenic signalling and can be divided into two subfamilies: receptor tyrosine kinases, that have an extracellular ligand binding domain, a single transmembrane domain and an intracellular tyrosine kinase domain and nonreceptor tyrosine kinases, which are soluble, cytoplasmic kinases. (18 Nov 1997) |
| nonsense mutation |
A gene mutation in which a base-pair change in the DNA causes a change in an mRNA codon from an amino acid-coding codon to a chain-terminating (nonsense) codon. As a result, polypeptide chain synthesis is terminated prematurely and is therefore either nonfunctional or, at best, partially functional.
출처: www.modernhumanorigins.com/n.html
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|---|---|
| non- |
Notice of Non-Compliance
출처: www.epa.gov/region03/enforcement/definitions.htm
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| non |
Notice of Non-Compliance
출처: www.epa.gov/region03/enforcement/definitions.htm
|
| nonulcer dyspepsia |
A common disorder in which the upper digestive tract produces symptoms such as pain, burning or discomfort in the upper abdomen, but tests fail to reveal a specific cause such as a peptic ulcer.
출처: www.cnn.com/HEALTH/library/DG/00022.html
|
| nonsense mutation |
A mutation that changes a normal codon into one which does not code for an amino acid.
출처: www.pestmanagement.co.uk/lib/glossary/glossary_n.s...
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| non | not likely to arouse controversy |
|---|---|
| non | of lines, planes, or surfaces |
| non | marked by disregard for critical standards or procedures |
| non | not in a state of crisis or emergency |
| non | (chemistry and physics) not critical |
| non | not in a state of crisis or emergency |
| non | of little importance |
| non | not crystalline |
| non | not current or belonging to the present time |
| non | not cyclic |
| non | not having repeated cycles |
| non | not cyclic |