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| Bact, bact | Bacterium; bacterium, bacteria |
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| SOM | Soil organic matter |
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| bacterium | <microbiology> A tiny, unicellular, prokaryotic organism that reproduces by cell division and usually has a cell wall, can be shaped like a sphere, rod or spiral and can be found in virtually any enviroment. (09 Oct 1997) |
|---|---|
| Binn's bacterium | A type of the typhoid-paratyphoid subgroups of the nonlactose-fermenting bacteria. (05 Mar 2000) |
| blue-green bacterium | <organism> Modern term for the blue green algae, prokaryotic cells that use chlorophyll on intracytoplasmic membranes for photosynthesis. The blue green colour is due to the presence of phycobiliproteins. Found as single cells, colonies or simple filaments. In Anabaena, in which the cells are arranged as a filament, heterocysts capable of nitrogen fixation occur at regular intervals. According to the endosymbiont theory Cyanobacteria are the progenitors of chloroplasts. (18 Nov 1997) |
| Chauveau's bacterium | Former name for Clostridium chauvoei. (05 Mar 2000) |
| pyogenic bacterium | A bacterium that causes a pyogenic infection, such as the pyogenic cocci (staphylococci, streptococci, pneumococci, meningococci) and Haemophilus influenzae. (05 Mar 2000) |
| sulphate-reducing bacterium | <microbiology> A prokaryote which is able to reduce sulphate SO4 (as a terminal electron acceptor) using electrons donated from organic acids, fatty acids, alcohols or hydrogen (electron donors). (19 Jan 1998) |
| endoteric bacterium | A bacterium that forms an endotoxin. (05 Mar 2000) |
| exoteric bacterium | A bacterium that secretes an exotoxin. (05 Mar 2000) |
| lysogenic bacterium | A bacterium in the symbiotic condition in which its genome includes the genome (probacteriophage) of a temperate bacteriophage; in occasional instances the probacteriophage dissociates from the bacterial genome, develops into vegetative bacteriophage, and then matures, causing lysis of the respective host bacterium and release into the culture medium of infective temperate bacteriophage, formerly, a pseudolysogenic bacterial strain, i.e., a "carrier" strain of bacteriophage of low infectivity. (05 Mar 2000) |
| buried soil | Soil covered by an alluvial, loessal, or other deposit (including manmade). (09 Oct 1997) |
| very poorly drained soil | <ecology> A condition is which water is removed from the soil so slowly that free water remains at or on the surface during most of the growing season. (18 Nov 1997) |
| mineral soil | <ecology> Any soil consisting primarily of mineral (sand, silt and clay) material, rather than organic matter. (12 Jan 1998) |
| poorly drained soil | <ecology> A condition in which water is removed form the soil so slowly that the soil is saturated periodically during the growing season or remains wet for long periods greater than 7 days. (09 Oct 1997) |
| saturated soil | A condition in which all easily drained voids (pores) between soil particles are temporarily or permanently filled with water, significant saturation during the growing season is considered to be usually one week or more. (09 Oct 1997) |
| hydric soil | A soil that is saturated, flooded or ponded long enough during the growing season to develop anaerobic conditions in the upper part. (09 Oct 1997) |
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