IUPAC Glossary of Terms Used in Toxicology – Terms Starting with Q
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quality assurance
All those planned and systematic actions necessary to provide
adequate confidence that a product or service will satisfy given
requirements for quality.
- Operational techniques and activities that are used to fulfill requirements for quality.
- In toxicology, procedures incorporated in experimental
protocols to reduce the possibility of error, especially human
error.
Note: This is a requirement of good laboratory practice.
quantal
Describing a condition that can be expressed only as occurring
or not occurring, such as death.
[2]
quantal effect
all-or-none effect
antonym graded effect
Condition that can be expressed only as ‘occurring’
or ‘not occurring’, such as death or occurrence of a
tumor.
quantitative structure-activity
relationship (QSAR)
Quantitative structure-biological activity model derived using
regression
analysis and containing as parameters physicochemical
constants, indicator variables or theoretically calculated
values.
Note: The term is extended by some authors to include chemical
reactivity, i.e. activity and reactivity are regarded as
synonyms. This extension is discouraged.
[2]
quantitative structure metabolism relationship
(QSMR)
Quantitative association between the physicochemical and (or) the
structural properties of a substance and its metabolic
behavior.
[2]