A general term for any factor that increases a personâs mental or physical stress; virtually all stressors can be described as related to environment (e.g., inadequate housing) or personal (e.g., health related, sexual, social or related to work).
Bovine serum albumin (also known as BSA or Fraction V) is a serum albumin protein derived from cows.It is often used as a protein concentration standard in lab experiments.t is also used as a nutrient in cell and microbial culture. In restriction digests, BSA is used to stabilize some enzymes during digestion of DNA and to prevent adhesion of the enzyme to reaction tubes, pipet tips, and other vessels.
The BSA was founded in 1910 and, since then, more than 110 million Americans have been participants in BSA programs at some time.. The BSA is part of the international Scout Movement and became a founding member organization of the World Organization of the Scout Movement in 1922.