Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Toxicology

relative systemic availability

Biology; Toxicology

Quantity of metabolizable substance divided by product of quantity of absorbed substance and exposure.

reference value

Biology; Toxicology

Quantity value, generally accepted as having a suitably small measurement uncertainty, to be used as a basis for comparison with values of quantities of the same kind.

reactive nitrogen species (RNS)

Biology; Toxicology

Radical nitrogen-based molecules that can act to facilitate nitrosylation reactions; reactive nitrogen species include dioxidonitrogen(•) (nitrogen dioxide, nitryl radical) NO2•, ...