TERMIUM Plus®

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I.U. [1 record]

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Alphabetical list of terms

Record 1 2004-09-16

English

Subject field(s)
  • Metrology and Units of Measure
  • Nutritive Elements (Biological Sciences)
DEF

Used as a measure of the comparative potency of natural substances, such as vitamins, before they are obtained in sufficiently pure form to measure by weight. An international unit (i.u.) is arbitrarily defined in terms of a reproducible standard, e.g./i.u. of vitamin A was originally microgram of the purest then known preparation of carotene, later o.6 microgram of beta-carotene.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Éléments nutritifs (Sciences biologiques)
OBS

L'unité internationale de vitamine A correspond à l'activité de 0.344g d'acétate de vitamine A. Les besoins quotidiens sont de 30 à 100 U.I. par kilo de poids corporel soit 5000 U.I. pour un homme normal.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
  • Elementos nutritivos (Ciencias biológicas)
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