| NTRC | National Toxins Research Center |
|---|---|
| ABL | abetalipoproteinemia; acceptable blood loss; African Burkitt lymphoma; Albright-Butler-Lightwood [sy... |
| BW | bacteriological warfare; bed wetting; below waist; biological warfare; biological weapon; birth weig... |
| RBE | Relative Biological Effectiveness |
| ABC | absolute basophil count; absolute bone conduction; acalculous biliary colic; acid balance control; a... |
| CT | Cholera toxins |
|---|---|
| Stx1 | Shiga toxins 1 |
| B.E.I. | Biological Exposure Index |
| BI | biological indicator |
| BNR | Biological Nutrient Removal |
| bacterial toxins | Toxic substances formed in or elaborated by bacteria; they are usually proteins with high molecular weight and antigenicity; some are used as antibiotics and some to skin test for the presence of or susceptibility to certain diseases. (12 Dec 1998) |
|---|---|
| botulinum toxins | <chemical> Toxins produced by clostridium botulinum. There are at least seven different substances, most being proteins. They have neuro-, entero-, and haemotoxic properties, are immunogenic, and include the most potent poisons known. The most commonly used apparently blocks release of acetylcholine at cholinergic synapses. Pharmacological action: anti-dyskinesia agents. (12 Dec 1998) |
| marine toxins | Toxic or poisonous substances elaborated by marine flora or fauna. They include also specific, characterised poisons or toxins for which there is no more specific heading, like those from poisonous fishes. Clupeotoxin, pahutoxin, prymnesin, scombrotoxin go here. (12 Dec 1998) |
| pertussis toxins | <chemical> Any of various biologically active proteins or toxins elaborated by bordetella pertussis that cause the symptoms of whooping cough. Some activate pancreatic islets, others inhibit the adenylate cyclase cascade and some cause lymphocytosis. Chemical name: Toxins, pertussis (12 Dec 1998) |
| streptococcal toxins | Group of haemolytic exotoxins released by Streptococci. _ haemolysin: 26-39 Kd (four types), forms ring like structures in membranes (see Streptolysin O). Lipid target unclear. _ haemolysin: a hot cold haemolysin with sphingomyelinase C activity. _ haemolysin: complex of two proteins (29 and 26 kD) that act synergistically, rabbit erythrocytes particularly sensitive. _ toxin: heat stable peptide (5 kD) with high proportion of hydrophobic amino acids. Seems to act in a detergent like manner (c.f. Subtilysin), but may form hydrophilic transmembrane pores by cooperative interaction with other _ toxin molecules. Leucocidin (Panton Valentine leucocidin): two components f (fast migration on CM cellulose column: 32 kD) and s (slow: 38 kD). Mode of action contentious. See: Streptococcus, streptolysins O and S, erythrogenic toxin. (18 Nov 1997) |
| toxins | Poisons produced by certain animals, plants, or bacteria. (12 Dec 1998) |
| lyngbya toxins | Toxins isolated from any species of the seaweed lyngbya or similar chemicals from other sources, including mollusks and micro-organisms. These have been found to be potent tumour promoters. (12 Dec 1998) |
| biological | Pertaining to biology. (18 Nov 1997) |
| biological agent | <microbiology> A disease-causing microorganism or virus, or other toxic biological matter, which is used as a weapon during war. (21 Mar 1998) |
| biological assay | <technique> Once a pharmaceutical protein is isolated from the cells in which it was grown, researchers perform tests to measure the protein's biological activity. It must maintain a certain minimal level of biological activity to be used for animal or clinical testing or, later, for market. Researchers also test to confirm that the isolated protein is identical to the desired protein. (21 Mar 1998) |
| biological assessment | A specific process required as part of an environmental assessment. An evaluation of potential effects of a proposed project on proposed, endangered, threatened, and sensitive animal and plant species and their habitats. (05 Dec 1998) |
| biological availability | The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action. (12 Dec 1998) |
| biological chemistry | The scientific study of the chemistry of living cells, tissues, organs and organisms. (09 Oct 1997) |
| biological clock | <biology, physiology> An internal biological mechanism which controls certain biological rhythms and biocycles, such as metabolism, sleep cycles, photosynthesis. (21 Mar 1998) |
| biological clocks | The physiological mechanisms that govern the rhythmic occurrence of certain biochemical, physiological, and behavioural phenomena in plants and animals. The pineal gland, which receives input from the optic nerves and connects to the hypothalamus, may be the biological clock in humans. (12 Dec 1998) |
Synonyms : Biological Toxins
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