strain

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strain:

see strength of materialsstrength of materials,
measurement in engineering of the capacity of metal, wood, concrete, and other materials to withstand stress and strain. Stress is the internal force exerted by one part of an elastic body upon the adjoining part, and strain is the deformation or change in
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.

Strain

 

a pure culture of a species of microorganism in which its morphological and physiological characteristics are studied.

Strains can be isolated from a variety of sources, for example, soil, water, or food, or they can be isolated from a single source at different times. Hence, the same species of bacterium, yeast, or microscopic fungus may have a great many strains, differing from one another in several characteristics, such as sensitivity to antibiotics and capacity to produce toxins and enzymes. Commercial strains of microorganisms developed as a result of selection and used in industry for the microbiological synthesis of proteins (including enzymes), antibiotics, vitamins, and organic acids are much more productive than wild strains.

strain

[strān]
(biology)
An intraspecific group of organisms that possess only one or a few distinctive traits and are maintained as an artificial breeding group.
(cell and molecular biology)
A population of cells derived either from a primary culture or from a cell line by the selection or cloning of cells having specific properties or markers.
(mechanics)
Change in length of an object in some direction per unit undistorted length in some direction, not necessarily the same; the nine possible strains form a second-rank tensor.

strain

A change in the form or shape of a body or material which is subjected to an external force.

strain

Any deformation or deflection in a body caused by stress. The strain is directly proportional to the stress, as a load is applied until the proportional limit is reached. Beyond that point, the strain may increase at a changing rate until the yield stress is reached, but the part will return to its original size and shape when the load is removed and the strain is zero. The body will be deformed if the yield stress is exceeded. The strain is recorded as the change of size over the original size.

strain

1
1. Music a theme, melody, or tune
2. a feeling of tension and tiredness resulting from overwork, worry, etc.; stress
3. a particular style or recurring theme in speech or writing
4. Physics the change in dimension of a body under load expressed as the ratio of the total deflection or change in dimension to the original unloaded dimension. It may be a ratio of lengths, areas, or volumes

strain

2
1. a group of organisms within a species or variety, distinguished by one or more minor characteristics
2. a variety of bacterium or fungus, esp one used for a culture
References in periodicals archive ?
Next, the effect of drug resistance on individuals infected with wild-type strain is investigated.
We found that Haloarcula Hispanic also could form biofilms when cultured in static chambers, and the gene deletion mutants [DELTA]HAH_1662 and [DELTA]HAH_1667 more tended to form biofilms (the air-liquid layer and the bottom layer) as compared with the wild-type strain (supplemental material Figure S2).
cholerae produced significantly more OMVs than the wild-type strain, confirming previous findings by Song et al.
Thus, a complete subset of strains involving five markers includes the wild-type strain, [TABULAR DATA FOR TABLE 3 OMITTED] the five strains with a single marker, the 10 strains with two, the 10 strains with three, the five strains with four, and the single strain with five markers.
Typhi, a comparative proteomics approach was used to distinguish between the two-dimensional electrophoresis profiles of bacterial total proteins in wild-type strain and [DELTA]ygaE strain.
Figure 3B shows significantly higher ROS levels in the transgenic worms compared to the wild-type strain (P<0.001).
Wild-type strain LXS240101 and transformants with stable phenotypes were inoculated onto PDA plates without hygromycin B and cultivated for five days at 25[degrees]C to observe the colony morphology.
Evidence for transplacental transmission of the current wild-type strain of bluetongue virus serotype 8 in cattle.
The primers consisted of a forward primer N1f (nt 517-534: 5'-GGGGCTGTG-GCTGTATTG-3') and reverse primer H274r (nt 759-784: 5'-GGATAA-CAGGAGCAYTCCTCATAGTG-3') for wild-type strain detection or Y274r (nt 759-784: 5'-GGATAACA-GGAGCAYTCCTCATAGTA-3') for mutant strain detection.
Earlier studies on mating competitiveness and life history traits under Indian laboratory settings have shown the OX513A strain to be largely comparable to wild-type strains of Ae.
Therefore, we designed 2 additional dual-target assays that target 2 separate genomic regions in which vaccine and wild-type strains differ sufficiently from one another (Figure 1, panel A).