| biochemical oxygen demand | The amount of oxygen aerobicorganisms need to carry out oxidative metabolism in watercontaining organic matter, such as sewage. (09 Oct 1997) |
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| chemical oxygen demand | The amount of dissolved oxygen required to combine with chemicals in wastewater. A measure of the oxygen equivalent of that portion of organic matter that is susceptible to oxidation by a strong chemical oxidizing agent. (05 Dec 1998) |
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| baseload demand | The minimum demand experienced by an electric utility, usually 30-40% of the utility's peak demand. (05 Dec 1998) |
| health services needs and demand | Health services required by a population or community as well as the health services that the population or community is able and willing to pay for. It includes the identification and assessment of the needs as measured by objective criteria and standards. (12 Dec 1998) |
| demand | A quantity of a substance, commodity, or service wanted or required. (05 Mar 2000) |
| demand pacemaker | A form of artificial pacemaker usually implanted into cardiac tissue because its output of electrical stimuli can be inhibited by endogenous cardiac electrical activity. (05 Mar 2000) |
| demand pulse generator | A generator which suppresses its output in response to natural ventricular activity but which, in the absence of such activity, functions as an asynchronous pulse generator. Synonym: demand pulse generator, standby pulse generator. (05 Mar 2000) |
| biochemical | Relating to biochemistry, characterised by, produced by or involving chemical reactions in living organisms. (18 Nov 1997) |
| biochemical conversion process | The use of living organisms or their products to convert organic material to fuels. (05 Dec 1998) |
| biochemical genetics | The study of genetics in terms of the chemical (biochemical) events involved, as in the manner in which DNA molecules replicate and control the synthesis of specific enzymes by the genetic code. (05 Mar 2000) |
| biochemical mechanism | This is the general term for any chemical reaction or series of reactions, usually mediated by enzymes, which produce a given physiological effect in a living organism. (09 Oct 1997) |
| biochemical metastasis | The transportation and induction of abnormal immunochemical specificities in apparently normal organs. (05 Mar 2000) |
| biochemical phenomena | Biochemical functions, activities, and processes at organic and molecular levels in humans, animals, microorganisms, and plants. (12 Dec 1998) |
| biochemical profile | A combination of biochemical tests usually performed with automated instrumentation upon admission of a patient to a hospital or clinic. (05 Mar 2000) |
| genetics, biochemical | A branch of genetics which deals with the chemical structure of the genes and with the mechanisms by which the genes control and regulate the structure and synthesis of proteins. (12 Dec 1998) |
| alactic oxygen debt | That part of the oxygen debt that is not lactacid oxygen debt; during recovery, stores of ATP and creatine phosphate must be replenished by oxidative metabolism, and a small amount of oxygen is also needed to restore the normal oxyhemoglobin levels throughout the circulating blood. (05 Mar 2000) |