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In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances. International units are used to quantify vitamins and biologics ( hormones , some medications , vaccines , blood products and similar biologically ...
The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme's catalytic activity. [1]1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micro mole of substrate per minute under the specified conditions of the assay method.
The International System of Units, internationally known by the abbreviation SI ... 10 −6 kg is written milligram and mg, not microkilogram and μkg. [1]: ...
International units (IU) are based on measured biological activity or effect, or for some substances, a specified equivalent mass. [ citation needed ] Enzyme activity ( kat ) is commonly used for e.g. liver function tests like AST , ALT , LD and γ-GT in Sweden.
The atricle writes: ‹1 IU is equivalent to 0.0347 mg of human insulin (28.8 IU/mg).› It is confused. mg is a unit of mass. IU/mg is a unit of the mass fraction (a concentration-like unit). Which is correct? ZJ 12:25, 31 October 2012 (UTC)
In SI base units In other SI units SI: Physics: Basic: second [n 1] s: T: time: The duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. s: SI: Physics: Basic: metre: m: L: length: The distance travelled by light in vacuum in 1 / 299 ...
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However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes.