strain

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Related to yield strain: offset yield strength, Yield strength

strain

 [strān]
1. to overexercise.
2. excessive effort or exercise.
3. an overstretching or overexertion of some part of the musculature.
4. to filter or separate.
5. a group of organisms within a species or variety, characterized by some particular quality, as rough or smooth strains of bacteria.
caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as difficulty performing the caregiver role.
risk for caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as vulnerability of a caregiver for felt difficulty performing the caregiver role.

strain

(strān),
1. A population of homogeneous organisms possessing a set of defined characteristics; in bacteriology, the set of descendants that retains the characteristics of the ancestor; members of a strain that subsequently differ from the original isolate are regarded as belonging either to a substrain of the original strain, or to a new strain
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use (usually refers to a muscle tear).
5. An act of straining.
6. Injury resulting from strain or overuse.
7. The change in shape that a body undergoes when acted on by an external force.
8. To filter; to percolate.

strain 1

(strān)
v.
1. To pull, draw, or stretch tight.
2. To stretch or exert one's muscles or nerves to the utmost.
3. To injure or impair by overuse or overexertion; wrench.
4. To pass a liquid through a filtering agent.
5. To draw off or remove by filtration.
n.
1. The act of straining.
2. The state of being strained.
3. Extreme or laborious effort, exertion, or work.
4. A great or excessive pressure, demand, or stress on one's body, mind, or resources.
5. A wrench, twist, or other physical injury resulting from excessive tension, effort, or use.

strain 2

(strān)
n.
1. Biology
a. A group of bacteria or viruses that are genetically distinct from other groups of the same species.
b. A group of cultivated plants or domestic animals of the same species that have distinctive characteristics but are not considered a separate breed or variety.
2.
a. The collective descendants of a common ancestor; a race, stock, line, or breed.
b. Any of the various lines of ancestry united in an individual or a family; ancestry or lineage.

strain

noun AIDS An HIV isolate from a person or group of persons given its own unique identifier, or strain name–eg, MN, LAI Orthopedics An overuse injury verb To injure by overuse; to wear out or stress beyond normal limits; straining may be associated with tissue microtearing Ophthalmology Overuse of eyes, resulting in transient discomfort Vox populi verb To filter; remove particles from a fluid

strain

(strān)
1. A population of homogeneous organisms possessing a set of defined characters. bacteriology The set of descendants that retains the characteristics of the ancestor; members of a strain that subsequently differ from the original isolate are regarded as belonging either to a substrain of the original strain, or to a new strain.
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use.
5. An act of straining.
6. Injury resulting from tensile force to muscle or tendon, especially skeletal muscles.
7. The change in shape that a body undergoes when acted on by an external stress.
8. To filter; to percolate.
[A.S. strēon, progeny]

strain

Stretching or tearing of muscle fibres, usually in the course of athletic overactivity. There is swelling, pain, bruising and a tendency to muscle spasm. Treatment is by rest, STRAPPING and painkilling drugs.

strain

a group of organisms within a species or variety, distinguished by one or more minor characteristics.

strain 

1. Internal tension in a lens due to poor annealing, or to glass of a non-uniform coefficient of expansion, or from external pressure on the edge of a glass spectacle lens. It results in birefringence, which is observed with a polariscope.
2. To overwork a faculty (e.g. eyestrain caused by sustained vision of near point objects); or a part of the body (e.g. muscles); or a system (e.g. the effect on corneal metabolism of a closed eye wearing a PMMA lens. This is often referred to as

strain

(strān)
1. Population of homogeneous organisms possessing a set of defined characteristics.
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use (usually refers to a muscle tear).
5. An act of straining.
6. Injury resulting from strain or overuse.
7. Change in shape that a body undergoes when acted on by an external force.
8. To filter; to percolate.
[A.S. strēon, progeny]

Patient discussion about strain

Q. My doctor advised me not to strain much. My doctor advised me not to strain much. What if I am physically unable to exercise due to a medical condition?

A. Your doctor is more concerned about your health. So accept his advice and improve in your health. There is virtually no medical condition that will keep you from doing any type of exercise. Even people with heart failure -- who were long told not to exercise at all -- can benefit from moderate amounts of activity. And people with limited mobility can often do water exercises, or do yoga or other exercises while seated in a chair (some "chair exercise" videos are now on the market). Of course, if you have any medical condition, check with your doctor before starting any exercise program.

Q. shoulder and neck strain and pain I have a terrible shoulder and neck pain and i keep cracking my neck muscles to release pressure. I get temporary relief with tylenol but after few hrs the pain and strain starts again.Any ideas?

A. A mellow exercise and streching on a regular basis is the best way to release a sore back and muscles in general, including your neck. You should try that plus applying local warm temperature (for example a warm pillow)around your neck. If that doesn't work then other anti-inflammatory drugs that you either apply as a cream or take as a pill can help you.

Q. any tips for low back strain? I'm an athlete, been having maaaajor lower back pain lately, during sports mainly but also when I just get out of bed in the morning. I was never like this- I'm really into sports and never felt so old in my life!!! Dont think the doctors really know their way with me, was hoping for some tips from your side. thanx

A. Take Ibuprofen. I take 600mg and helps a lot. Also stretch like crazy -- three times a day if you can. Stretch you hamstring totally. You need to be very limber all the time. You should also lay off on exercising for a bit. Wait for the irritations to go down. Do tons of back and stomach exercises -- only after the irritation goes down. First thing in the morning is get out of bed, turn toward your bed,lift your leg on the bed and stretch you legs. Lots of things to do. Don't wait too long to see a doctor - it doesn't help not seeing a doc. The best a doc can do is give you an MRI. Xrays are ok but an MRI tells the story. I know, I had two back operations and have a bad back for 30 years (I am 49). Had my operations 7 months ago and now I lift almost every day (I don't lift as much -- just a lot of reps). Good luck.

More discussions about strain
References in periodicals archive ?
The axial yield strains for CSMGFRP wrapped columns showed increase in the range of 4.68% to 57.89% for 3 mm thick wrap and in the range of 4.63% to 48.61% for 5 mm thick CSMGFRP wrap.
Subsequently, the corresponding yield strain is also estimated through unloading process at different applied strains, and the result is given in Figure 14(b).
An observation of the measures of fitness of regression shows that the multivariate linear regression can estimate the prediction values with reasonable levels of accuracy for ultimate stress, ultimate axial strain, ultimate lateral strain, yield stress, yield strain, deflection ductility, energy ductility and total energy absorption.
However, the strain of the transverse rebar for all the specimens did not reach yield strain, so a confinement effect for the columns hardly was observed in the study.
With regard to yield strain, the data presented in Fig.
Both the yield strains of D18 and D16 were less than the ultimate compressive strain of concrete, which means theoretically that the longitudinal steel bars yield first before the concrete damage.
It is worth noting that similar to the sample quenched to room temperature, the samples with the same isothermal crystallization temperature showed identical yield strain regardless of different stretch temperatures.
The plastic plateau terminates when strain of the steel, [[epsilon].sub.s], is equal to 10 times the yield strain of the steel (10[[epsilon].sub.sy]) and stress increases up to ultimate strength of the steel, [f.sub.u], which is achieved when the ultimate strain of the steel, [[epsilon].sub.su], is 0.1, as shown in Figure 4(c).
The yield strength and the Young's modulus gradually decline with increasing TX100/MWCNTs from 8.24 x [10.sup.5] Pa and 1.98 x [10.sup.6] Pa (TX100/MWCNTs volume ratio of 4.7) to 2.12 x [10.sup.5] Pa and 8.11 x [10.sup.5] Pa (TX100/MWCNTs volume ratio of 31.1) while the yield strain shows an insignificant change by remaining at 64-67% strain.
In both cases, the maximum strain can assume values less or greater than the yield strain [[epsilon].sub.y]; when [[epsilon].sub.max] exceeds [[epsilon].sub.y], three elements are necessary for schematizing the panel (Figure 2(c)).
The yield strain, which is located between 0.07 and 0.17, is higher for the systems near the stoichiometric composition and incorporating less PGE.
Regarding the yield strain, it is worthwhile to point out that the PBAT and the samples 10CNCref and 10CNC_PBG did not break during the tensile tests; that is, the incorporation of 10 wt% of rigid CNC (with and without modification) to the PBAT did not modify the extensibility of the PBAT.