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Recycling
The processing of used materials or waste into new products to prevent the waste of potentially useful waste material, reduce consumption of fresh material, as well as reduce energy consumption and environmental pollution.
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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 ...
