| env | <molecular biology> Retroviral gene encoding viral envelope glycoproteins. (18 Nov 1997) |
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| env gene | <molecular biology> One of three retrovirus genes which codes for the env glycoproteins. (09 Oct 1997) |
| env glycoprotein | <molecular biology> An important protein component of the mature retrovirus protein outer coat (the capsid). It is coded for by the env genes. (09 Oct 1997) |
| envelop | 1. That which envelops, wraps up, encases, or surrounds; a wrapper; an inclosing cover; especially, the cover or wrapper of a document, as of a letter. 2. <astronomy> The nebulous covering of the head or nucleus of a comet; called also coma. 3. A work of earth, in the form of a single parapet or of a small rampart. It is sometimes raised in the ditch and sometimes beyond it. 4. <geometry> A curve or surface which is tangent to each member of a system of curves or surfaces, the form and position of the members of the system being allowed to vary according to some continuous law. Thus, any curve is the envelope of its tangents. 4. A set of limits for the performance capabilities of some type of machine, originally used to refer to aircraft. Now also used metaphorically to refer to capabilities of any system in general, including human organizations, especially. In the phrase push the envelope. It is used to refer to the maximum performance available at the current state of the technology, and therefore refers to a class of machines in general, not a specific machine. Push the envelope Increase the capability of some type of machine or system; usu. By technological development. Origin: F. Enveloppe. Source: Websters Dictionary (01 Mar 1998) |
| envelope | 1. <virology> Lipoprotein outer layer of some viruses derived from plasma membrane of the host cell. 2. <microbiology> The plasma membrane and cell wall complex of a bacterium. (11 Nov 1997) |
| envelope conformation | See: Haworth conformational formulas of cyclic sugars. (05 Mar 2000) |
| envelope flap | A mucoperiosteal flap retracted from a horizontal incision along the free gingival margin. (05 Mar 2000) |
| envenomation | The act of injecting a poisonous material (venom) by sting, spine, bite, or other venom apparatus. (05 Mar 2000) |
| enviomycin | <chemical> 1-(l-threo-3,6-diamino-4-hydroxyhexanoic acid)-6-(l-2-(2- amino-1,4,5,6-tetrahydro-4-pyrimidinyl)glycine)viomycin. Cyclic basic peptide related to viomycin. It is isolated from an induced mutant of streptomyces griseoverticillatus var. Tuberacticus and acts as an antitubercular agent with less ototoxicity than tuberactinomycin. Pharmacological action: antibiotics, antitubercular, antibiotics, peptide. Chemical name: Viomycin, 1-((3R,4R)-4-hydroxy-3,6-diaminohexanoic acid)-6-(L-2-(2-amino-1,4,5,6-tetrahydro-4-pyrimidinyl)glycine)-, (R)- (12 Dec 1998) |
| environment | <biology, zoology> The sum total of all the conditions and elements which make up the surroundings and influence the development and actions of an individual. (18 Nov 1997) |
| environment and public health | Natural and man-made environments and their impact on public health. (12 Dec 1998) |
| environment design | The structuring of the environment to permit or promote specific patterns of behaviour. (12 Dec 1998) |
| environment, controlled | A state in which the environs of hospitals, laboratories, domestic and animal housing, work places, spacecraft, and other surroundings are under technological control with regard to air conditioning, heating, lighting, humidity, ventilation, and other ambient features. The concept includes control of atmospheric composition. (12 Dec 1998) |
| environmental assessment | (EA) A public document that analyzes a proposed federal action for the possibility of significant environmental impacts. The analysis is required by NEPA. If the environmental impacts will be significant, the federal agency must then prepare an environmental impact statement. (05 Dec 1998) |
| environmental exposure | The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals. (12 Dec 1998) |
| gene products, env | Retroviral proteins, often glycosylated, coded by the envelope (env) gene. They are usually synthesised as protein precursors (polyproteins) and later cleaved into the final products by a viral protease. (12 Dec 1998) |
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| genes, env | DNA sequences that form the coding region for the viral envelope (env) proteins in retroviruses. The env genes contain a cis-acting RNA target sequence for the rev protein (= gene products, rev), termed the rev-responsive element (rre). (12 Dec 1998) |