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 ?
We are very keen to put on a competitive card to satisfy the needs of trainers and also take a bit of the strain off my heart.
Email Systems online managed ASP approach, which allows them to take the strain off their client's shoulders regarding spam and viruses, represents an ideal fit for our product.
Some people boil up cloves of garlic, strain off the liquid and water around plants with that.
Having a map and a compass and the knowledge of how to use them costs very little but will massively add to the enjoyment of a mountain day and will take a great strain off volunteer rescue services.
If I had a bad day at work she would make me feel better with her smile and sitting listening to my grumbles, she made my days feel good, regardless of the weather, and never complained when she was looking after the children, although I used to help when I was at home and took some of the strain off her.
Take some of the strain off their backs and pay them properly for the important roles they play and maybe there will be less demand for supply teachers
The club, based at St Augustine's Sports Centre, Chetton Avenue, Radford, can help take the strain off parents with sessions planned from Tuesday to Friday.
Not only is it good for mind and body, losing a few pounds can help take the strain off your pelvic floor muscles.
This is where a good funeral director is worth his or her weight in gold to take the strain off immediate family members.
That's despite the whole point of my being here is to take the strain off her.
I thought he was excellent at the Paralympic World Cup, he was one of the best players there and if he can do that again at the world championships then I think we can challenge because it takes the strain off the other guys and allows them to play.
This Thursday, Oasis in Cardiff is taking the strain off browsing by handing out cocktails and chocolate truffles to weary late-night shoppers, as part of Vogue's Fashion Night Out - there'll also be hair and make-up consultations from 5pm until 9pm.