| activation product | <radiobiology> The unstable nucleus formed when activation occurs. (See activation above.) (09 Oct 1997) |
|---|---|
| basal metabolism | <biochemistry, biology> Heat production, or its measurement, of an organism at the lowest level of cell chemistry in an inactive, awake, fasting state. It may be determined directly by means of a calorimeter or indirectly by calculating the heat production from an analysis of the end products of oxidation within the organism or from the amount of oxygen utilised. (27 Jun 1999) |
| by-product | <chemistry> A product of a chemical reaction or industrial process which is different from the desired product. (20 Mar 1998) |
| by-product material | Radioactive material produced by nuclear fission or by neutron irradiation in a nuclear reactor or similar device. (05 Mar 2000) |
| calcium metabolism | A set of biochemical processes which act to keep the level of calcium in the blood at a constant level, with enough around to build bones and teeth. (09 Oct 1997) |
| calcium metabolism disorders | Disorders in the processing of calcium in the body: its absorption, transport, storage, and utilization. (12 Dec 1998) |
| carbohydrate metabolism | <biochemistry> The breakdown of starches and sugars into smaller units that can be used by the body for energy. (27 Sep 1997) |
| gene product | The biochemical material, either RNA or protein, resulting from expression of a gene. The amount of gene product is used to measure how active a gene is, abnormal amounts can be correlated with disease-causing alleles. (09 Oct 1997) |
| respiratory metabolism | The exchange of respiratory gases in the lungs, oxidation of foodstuffs in the tissues, and production of carbon dioxide and water. (05 Mar 2000) |
| metabolism | <biochemistry> The sum of all the physical and chemical processes by which living organised substance is produced and maintained (anabolism) and also the transformation by which energy is made available for the uses of the organism (catabolism). Origin: Gr. Metaballein = to turn about, change, alter (18 Nov 1997) |
| phosphorus metabolism disorders | Disorders in the processing of phosphorus in the body: its absorption, transport, storage, and utilization. (12 Dec 1998) |
| cleavage product | A substance resulting from the splitting of a molecule into two or more simpler molecules. (05 Mar 2000) |
| water of metabolism | The water formed in the body by oxidation of the hydrogen of the food, the greatest amount being produced in the metabolism of fat (about 117 g/100 g of fat). Synonym: water of combustion. (05 Mar 2000) |
| Crassulacean acid metabolism | <plant biology> Physiological adaptation of certain succulent plants, in which carbon dioxide can be fixed (nonphotosynthetically) at night into malic and other acids. During the day the carbon dioxide is regenerated and then fixed photosynthetically into the Calvin Benson cycle. This adaptation permits the stomata to remain closed during the day, conserving water. (18 Nov 1997) |
| primary metabolism | Metabolic processes central to most cells; e.g., biosynthesis of macromolecules, energy production, turnover, etc. (05 Mar 2000) |