Biological assay; measurement of biologically active compounds (e.g. vitamins and essential amino acids) by their ability to support growth of microorganisms or animals.
A test which uses animals or microorganisms for determining the biological activity of certain substances or the presence or concentration of nutrients in the food.
Determination of the relative strength or bio-activity of a substance (e.g., a drug). A biological system (such as living cells, organs, tissues, or whole animals) is exposed to the substance in question and the effect on the living test system is measured.
The determination of the activity or potency of a substance by measuring the response of test animals or microorganisms to the substance being tested as compared with their response to a standard substance.
A test of the strength of a drug, hormone, vitamin or serum, by examining the effect it has on living animals or tissue.
Estimation of level or potency of a nutrient or drug using living organisms such as animals, bacteria or tissues.
Test, usually involving living organisms, of the effect or potency of a drug.
In pharmacology, the determination of the strength of a drug or substance by comparing its effect on a live animal or an isolated organ preparation with that of a standard preparation.