nitrogen equivalent

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• nitrogen lag — The length of time after the ingestion of a given protein before the amount of nitrogen equal to that in the protein has been excreted in the urine. * * * the time that elapses after the administration of a protein before there appears in the… …   Medical dictionary

• Nitrogen fixation — is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).[1] This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of …   Wikipedia

• Equivalent air depth — In technical diving, the equivalent air depth (EAD) is a way of expressing the narcotic effect of specific breathing gas mixtures that contain nitrogen, for example nitrox and trimix. [cite journal |last=Logan |first=JA |title=An evaluation of… …   Wikipedia

• Nitrogen narcosis — Inert gas narcosis [Nitrogen narcosis] Classification and external resources Divers breathe a mixture of oxygen, helium and nitrogen for deep dives to avoid the effects of narcosis. A cylinder label shows the maximum operating depth and mixture… …   Wikipedia

• nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

• Nitrogen asphyxiation — For the method of slaughtering farm animals, see Controlled Atmosphere Killing. Part of a series on Capital punishment Issues …   Wikipedia

• equivalent — 1. Equal in any respect. 2. That which is equal in size, weight, force, or any other quality to something else. 3. Having the capability to counterbalance or neutralize each other. 4. Having equal valencies. 5. SYN: gram e.. [see equivalence]… …   Medical dictionary

• Nitrogen cycle — Schematic representation of the flow of nitrogen through the environment. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds assimilable by higher …   Wikipedia

• nitrogen — 1. A gaseous element, atomic no. 7, atomic wt. 14.00674; N2 forms about 78.084% by volume of the dry atmosphere. 2. The molecular form of n., N2. 3. Pharmaceutical grade N2, containing not less than 99.0% by volume of N2; used as a …   Medical dictionary

• Protein Nitrogen Unit — The Protein Nitrogen Unit (PNU) measures the potency of the compounds used in allergy skin tests, and is equivalent to 0.01 microgram (µg) of phosphotungstic acid precipitable protein nitrogen.According to Russ Rowlett at the University of North… …   Wikipedia

• aziridine — noun əˈzirɪdin a) A three membered heterocycle containing two methylene groups and an imine; the nitrogen equivalent of ethylene oxide. b) Any derivative of this basic structure. Syn: ethyle …   Wiktionary