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Standardization
Standardization is the process of developing and implementing technical standards.
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toxicity equivalency factor (in risk assessment) (TEF)
Biology; Toxicology
Ratio of the toxicity of a chemical to that of another structurally related chemical (or index compound) chosen as a reference. Factor used to estimate the toxicity of a complex ...
sister chromatid exchange (SCE)
Biology; Toxicology
Reciprocal exchange of chromatin between two replicated chromosomes that remain attached to each other until anaphase of mitosis; used as a measure of mutagenicity of substances ...
safety
Biology; Toxicology
Reciprocal of risk: practical certainty that injury will not result from a hazard under defined conditions. Note 1. Safety of a drug or other substance in the context of human ...
risk identification
Biology; Toxicology
Recognition of a potential hazard and definition of the factors required to assess the probability of exposure of organisms or people to that hazard and of harm resulting from ...
surface layer
Biology; Toxicology
Region of space comprising and adjoining the phase boundary between a solid and liquid phase, between a solid and gas phase, or between a liquid and gas phase within which ...
opposition
Astrology; General astrology
An aspect of 180◦, normally occurs between planets of two opposite signs (e.g. Aries and Libra). It is considered a tense aspect that calls for choice between two opposed ...
