strain

Examples of strain in the following topics:

• Sprain and Strain

  • A strain is an injury to a muscle or tendon in which the muscle fibers tear as a result of overstretching.
  • A strain is also colloquially known as a pulled muscle.
  • Typical symptoms of a strain include: localized pain, stiffness, discoloration, and bruising around the strained muscle.
  • Strains can happen while doing everyday tasks and are not restricted to athletes.
  • Compression: Wrap the strained area to reduce swelling with an ACE soft-wrapped bandage.

• Complementation

  • Complementation refers to a relationship between two different strains of an organism which both have homozygous recessive mutations.
  • These strains are true breeding for their mutation.
  • When this occurs, each strain's haploid supplies a wild-type allele to "complement" the mutated allele of the other strain's haploid, causing the offspring to have heterozygous mutations in all related genes.
  • When strains are bred together, offspring inherit wildtype versions of each gene from either parent.
  • Flies from Strain 1 have complementary mutations to flies from Strain 2 because when they are crossed the offspring are able to complete the full metabolic pathway and thus have red eyes.

• Stress and Strain

  • The ratio of force to area $\frac{F}{A}$ is called stress and the ratio of change in length to length $\frac{\Delta L}{L}$ is called the strain.
  • The ratio of force to area $\frac{F}{A}$ is called stress and the ratio of change in length to length $\frac{\Delta L}{L}$ is called the strain.
  • Stress and strain are related to each other by a constant called Young's Modulus or the elastic modulus which varies depending on the material.
  • Using Young's Modulus the relation between stress and strain is given by: $\text{stress} = Y\cdot\text{strain}$.

• Antibiotic Misuse

  • Antibiotic misuse is one factor responsible for the emergence of antimicrobial resistant bacterial strains.
  • Developing new antibiotics and other treatments to keep pace with antibiotic-resistant strains of bacteria is necessary.
  • However, using antibiotics wisely is equally important for preventing the spread of resistant strains.
  • Antibiotic misuse has contributed largely to the emergence of new resistant strains.
  • Misusing them leads to resistant bacterial strains.

• Strain Theory: How Social Values Produce Deviance

  • Strain theory states that social structures within society may pressure citizens to commit crimes.
  • Social strain theory was developed by famed American sociologist Robert K.
  • Strain may be structural, which refers to the processes at the societal level that filter down and affect how the individual perceives his or her needs.
  • These types of strain can insinuate social structures within society that then pressure citizens to become criminals.
  • In this sense, according social strain theory, social values actually produce deviance in two ways.

• Combustion

  • In small-ring cyclic compounds ring strain can be a major contributor to thermodynamic stability and chemical reactivity.
  • The chief source of ring strain in smaller rings is angle strain and eclipsing strain.
  • As noted elsewhere, cyclopropane and cyclobutane have large contributions of both strains, with angle strain being especially severe.
  • Changes in chemical reactivity as a consequence of angle strain are dramatic in the case of cyclopropane, and are also evident for cyclobutane.

• Pulled Hamstring and Charley Horse

  • A strained hamstring, also known as a pulled hamstring, is defined as an excessive stretch or tear of muscle fibers and related tissue.
  • Grade 3 - Bruising due to strained hamstring, horizontal lines show where bandage was.
  • A grade three hamstring strain is a severe injury.
  • Lower grade strains can easily become worse if the hamstring is not rested properly.
  • Initial treatment of the injury, regardless of the severity of the strain, is the same.

• Statistical Literacy

  • The levels of troponin in subjects with and without signs of right ventricular strain in the electrocardiogram were compared in the experiment described here: http://www.bmj.com/content/326/7384/312.
  • The troponin concentration in patients with signs of right ventricular strain was higher (median = 0.03 ng/ml) than in patients without right ventricular strain (median < 0.01 ng/ml), p<0.001.

• Elasticity, Stress, and Strain

  • Elasticity is a measure of how much an object deforms (strain) when a given stress (force) is applied.
  • Strain is the change in length divided by the original length of the object.

• Ascomycota: The Sac Fungi

  • Sexual reproduction starts with the development of special hyphae from either one of two types of mating strains .
  • The "male" strain produces an antheridium (plural: antheridia) and the "female" strain develops an ascogonium (plural: ascogonia).
  • Special ascogenous hyphae arise, in which pairs of nuclei migrate: one from the "male" strain and one from the "female" strain.