Xenobiotic
A xenobiotic is a
chemical which is found in an
organism but which is not normally produced or expected to be present in it. It can also cover
substances which are present in much higher
concentrations than are usual. Specifically,
drugs such as
antibiotics are xenobiotics in humans because the human body does not produce them itself nor would they be expected to be present as part of a normal diet. However, the term is also used in the context of
pollutants such as
dioxins and
polychlorinated biphenyls and their effect on the
biota. Natural compounds can also become xenobiotics if they are taken up by another organism (e.g., uptake of natural human hormones by fish found downstream of sewage treatment plant outfalls).
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Xénobiotique
Ksenobiotyk
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Ксенобиотик
Ксенобиотики (от — чужой + βιος — жизнь) — чуждые, чужеродные для
организма химические вещества. Ксенобиотики не являются естественными
метаболитами живых организмов, и не входят в естественный биотический круговорот, так как порождаются активной хозяйственной деятельностью человека.
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Xenobiótico
La palabra xenobiótico deriva del griego "xeno" ("extraño") y "bio" ("vida"). Se aplica a los compuestos cuya estructura química en la naturaleza es poco frecuente o inexistente debido a que son compuestos sintetizados por el hombre en el laboratorio. La mayoría han aparecido en el medio ambiente durante los últimos 100 años.
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