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- International_unit abstract "In pharmacology, the international unit is a unit of measurement for the amount of a substance; the mass or volume that constitutes one international unit varies based on which substance is being measured, and the variance is based on the biological activity or effect, for the purpose of easier comparison across substances. International units are used to quantify vitamins, hormones, some medications, vaccines, blood products, and similar biologically active substances.The name international unit has often been capitalized (in English and other languages), although major English-language dictionaries treat it as a common noun and thus lowercase it. The name has several accepted abbreviations. It is often abbreviated as IU in English; as UI in Romance languages (for example, Spanish unidad internacional, French unité internationale); as IE in several Germanic languages (for example, German Internationale Einheit, Dutch internationale eenheid); or as other forms (for example, Russian МЕ, Международная единица, Hungarian NE, Nemzetközi Egység). In order to remove the possibility of having the letter "I" confused with the digit "1", some hospitals have it as a stated policy to omit the "I", that is, to only use U or E when talking and writing about dosages, while other hospitals require the word "Units" to be written out entirely.Many biological agents exist in different forms or preparations (e.g. vitamin A in the form of retinol or beta-carotene). The goal of the IU is to be able to compare these, so that different forms or preparations with the same biological effect will contain the same number of IUs. To do so, the WHO Expert Committee on Biological Standardization provides a reference preparation of the agent, arbitrarily sets the number of IUs contained in that preparation, and specifies a biological procedure to compare other preparations of the same agent to the reference preparation. Since the number of IUs contained in a new substance is arbitrarily set, there is no equivalence between IU measurements of different biological agents. For instance, one IU of vitamin E cannot be equated with one IU of vitamin A in any way, including mass or efficacy.Despite its name, IU is not part of the International System of Units used in physics and chemistry. The IU should not be confused with the enzyme unit, also known as the International unit of enzyme activity and abbreviated as U.".
- International_unit wikiPageExternalLink en.
- International_unit wikiPageID "865802".
- International_unit wikiPageRevisionID "591808634".
- International_unit hasPhotoCollection International_unit.
- International_unit subject Category:Pharmacology.
- International_unit subject Category:Units_of_measurement.
- International_unit type Abstraction100002137.
- International_unit type DefiniteQuantity113576101.
- International_unit type Measure100033615.
- International_unit type UnitOfMeasurement113583724.
- International_unit type UnitsOfMeasure.
- International_unit comment "In pharmacology, the international unit is a unit of measurement for the amount of a substance; the mass or volume that constitutes one international unit varies based on which substance is being measured, and the variance is based on the biological activity or effect, for the purpose of easier comparison across substances.".
- International_unit label "IU (jednostka)".
- International_unit label "International unit".
- International_unit label "Internationale Eenheid".
- International_unit label "Internationale Einheit".
- International_unit label "Unidad internacional".
- International_unit label "Unidades Internacionais".
- International_unit label "Unità internazionale".
- International_unit label "Unité internationale".
- International_unit label "Международная единица".
- International_unit label "وحدة دولية".
- International_unit label "国际单位".
- International_unit label "国際単位".
- International_unit sameAs Mezinárodní_jednotka.
- International_unit sameAs Internationale_Einheit.
- International_unit sameAs Unidad_internacional.
- International_unit sameAs Unité_internationale.
- International_unit sameAs Satuan_internasional.
- International_unit sameAs Unità_internazionale.
- International_unit sameAs 国際単位.
- International_unit sameAs 국제_단위.
- International_unit sameAs Internationale_Eenheid.
- International_unit sameAs IU_(jednostka).
- International_unit sameAs Unidades_Internacionais.
- International_unit sameAs m.03js00.
- International_unit sameAs Q835916.
- International_unit sameAs Q835916.
- International_unit sameAs International_unit.
- International_unit wasDerivedFrom International_unit?oldid=591808634.
- International_unit isPrimaryTopicOf International_unit.