| LBS | low back syndrome; lumbar back strain |
|---|---|
| LHS | left hand side; left heart strain; left heelstrike; lymphatic/hematopoietic system |
| LVS | left ventricular strain |
| Mo | Moloney [strain]; molybdenum; monoclonal |
| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
D factor
| crippled strain | <microbiology> A strain of bacteria, typically highly pathogenic, that has been genetically engineered so that it cannot survive on anything but a veryspecialised medium of nutrients, this is done so that geneticists can experiment on certain pathogens without the risk that they will escape fromthe lab. (09 Oct 1997) |
|---|---|
| HFR strain | A strain, or clone, in which a conjugative plasmid (such as an F'), integrated in the bacterial genome, is instrumental in the transfer (along with plasmid DNA) of integrated bacterial DNA in a sequential manner to a suitable recipient. Origin: high freguency of recombination (05 Mar 2000) |
| pseudolysogenic strain | A bacterial strain that is contaminated with a bacteriophage of low infectivity. Synonym: pseudolysogenic strain. (05 Mar 2000) |
| high frequency recombination strain | A type of bacterial strain which is able to pass on genetic information to neighboring bacteria at a high rate. The high-frequency recombination strain (Hfr) is able to do this because it possesses the f plasmid and can therefore initiate bacterial conjugation. (09 Oct 1997) |
| hypothetical mean strain | A hypothetical strain that possesses the characteristics of a calculated mean organism. (05 Mar 2000) |
| smooth strain | <microbiology> Bacterial strains that have altered outer cell wall carbohydrate chains causing colonies on agar to change their appearance from smooth to dull. In Streptococci the smooth strains are virulent whereas the rough strains are not. This is partly because the rough strains are much more readily phagocytosed. (17 Dec 1997) |
| neotype strain | A strain accepted by international agreement to replace a type strain which is no longer in existence or to serve as the type strain if a type strain was not designated and if no strain exists which can be designated as the type. Synonym: neotype culture. (05 Mar 2000) |
| stock strain | A bacterial or other microbial strain that has been maintained under laboratory conditions as representative of its type. (05 Mar 2000) |
| strain | A tearing injury to muscle. Usually causes some degree of bleeding within the muscle tissue (haematoma). (27 Sep 1997) |
| strain birefringence | <chemistry> Optical property of a material in which the refractive index is different for light polarized in one plane compared to the orthogonal plane. May arise from molecular organisation of the material (form birefringence.), alignment of molecules due to tension (stress birefringence.) or alignment of rod like particles in flow (flow birefringence). With crossed Nicoll prisms a birefringent material appears bright against a dark background. (19 Jan 1998) |
| strain development | Improving the genetics of an organism so that it carries out a biotechnological process more effectively. (14 Nov 1997) |
| strain fracture | The tearing off, by a sudden force, of a piece of bone attached to a tendon, ligament, or capsule; the force may be exogenous or endogenous. (05 Mar 2000) |
| strain gauge | A device, employing the Wheatstone bridge principle, used for accurate measurement of forces such as strain, stress, or pressure. (05 Mar 2000) |
| stress-strain curve | A curve showing the ratio of deformation to load during the testing of a material in tension. (05 Mar 2000) |
| inbred strain | Any strain of animal or plant obtained by a breeding strategy that tends to lead to homozygosity. Such breeding strategies include brother sister mating and back crossing of offspring with parents. See: congenic. (18 Nov 1997) |