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 ?
B) Alignment of real-time RT-PCR oligonucleotide binding sites with YFV 17DD and American wild-type strains.
0 times greater than those obtained from wild-type strain larvae exposed to parasitoids.
Host mortalities recorded in the controls of both VIENNA 8 and wild-type strains were respectively 3 and 2.
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.
Analysis of nucleotide sequences of the vaccine and wild-type strains revealed a substitution of C for T at position 106262, resulting in a substitution of glycine for arginine.
However, the limitation of this technique is that it fails to distinguish certain Japanese wild-type strains and isolates from other Asian regions that were misidentified as the Oka vaccine strain [17].
In addition, the method will also serve to identify and differentiate Oka-like wild-type strains that may possibly enter circulation and are likely to be missed by less discriminatory methods.
This could be due to selective pressure against mutations of this nucleotide among the wild-type strains [11].
Analysis of additional clinical specimens from different parts of the country will help to strengthen the validity of this approach, particularly in identifying Oka-like wild-type strains that may be in circulation.
As previously described, the MYXV Saito strain used before 1970 was not sufficiently attenuated and was thus potentially able to disseminate and recombine with circulating wild-type strains.
TEM], sul1, tetA (class A), tetA (class G), tetA (class B), and integrons in both wild-type strains and E.
For both the pathogenic and the wild-type strains, exposure to these levels of chlorine for 1 minute reduced the viable populations by approximately four orders of magnitude.