| biogenetic | <biology> Pertaining to biogenesis. Source: Websters Dictionary (01 Mar 1998) |
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| biogenetic law | The theory that ontogeny recapitulates phylogeny, which means that one can trace the evolutionary development of a species by studying the development of an individual embryo or young of that species. The theory is still used, especially in paleontology, but has been found to not be strictly true when applied to problems in biology. (09 Oct 1997) |
| biogenic | <biology> Something which came about as a result of the activities of living things. Something which is necessary for life processes. Origin: Gr. Gennan = to produce (09 Oct 1997) |
| biogenic amine | <biochemistry> Amines found in both animals and plants that are frequently involved in signalling. There are several groups: ethanolamine derivatives include choline, acetylcholine AMP, muscarine, catecholamines include adrenaline, noradrenaline & dopamine, polyamines include spermine, indolylalkylamines include tryptamine & serotonin, betaines include carnitine, polymethyline diamines include cadaverine & putrescine. (18 Nov 1997) |
| biogenic amine neurotransmitters | Biogenic amines released by neurons as intercellular messengers. The biogenic amines norepinephrine, dopamine, histamine, and serotonin are neurotransmitters in both the central and peripheral nervous systems. (12 Dec 1998) |
| biogenic amines | A group of naturally occurring amines derived by enzymatic decarboxylation of the natural amino acids. Many have powerful physiological effects (e.g., histamine, serotonin, epinephrine, tyramine). Those derived from aromatic amino acids, and also their synthetic analogs (e.g., amphetamine), are of use in pharmacology. (12 Dec 1998) |
| biogenic monoamines | Biogenic amines having only one amine moiety. Included in this group are all natural monoamines formed by the enzymatic decarboxylation of natural amino acids. (12 Dec 1998) |
| biogenic polyamines | Biogenic amines having more than one amine group. These are long-chain aliphatic compounds that contain multiple amino and/or imino groups. Because of the linear arrangement of positive charge on these molecules, polyamines bind electrostatically to ribosomes, DNA, and RNA. (12 Dec 1998) |
| biogenist | A believer in the theory of biogenesis. Source: Websters Dictionary (01 Mar 1998) |
| biogeny | <biology> A doctrine that the genesis or production of living organisms can take place only through the agency of living germs or parents; opposed to abiogenesis. Life development generally. Origin: Gr. Life +, birth. Source: Websters Dictionary (01 Mar 1998) |
| biogeochemistry | Study of microbially-mediated chemical transformations of geochemical interest, for example nitrogen or sulphur cycling. (09 Oct 1997) |
| biogeography | <study> The study of the distribution of different species of organisms aroundthe planet and the factors that influenced that distribution. (21 Mar 1998) |
| biogeotechnology | <study> The use of biological, ecological, and geotechnical engineering data to solve geological problems (such as erosion). Applied biogeotechnology focuses on using plants and human-made structures to control erosion, protect slopes, and restore environmental quality. (09 Oct 1997) |
| biognosis | <biology> The investigation of life. Origin: Gr. Life + investigation. Source: Websters Dictionary (01 Mar 1998) |
| biographer | <specialist> One who writes an account or history of the life of a particular person; a writer of lives, as Plutarch. (20 Mar 1998) |