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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 .
A cellulase unit (CU) is a unit of measurement for the enzyme cellulase.One cellulase unit is that activity that will produce a relative fluidity change of one in 5 minutes in a defined carboxymethylcellulose substrate under the conditions of an assay (50 deg Celsius, pH 4.5). [1]
The international unit measurement was used by the United States in 1968–2016. 1 IU is the biological equivalent of about 0.667 mg d (RRR)-alpha-tocopherol (2/3 mg exactly), or of 0.90 mg of dl-alpha-tocopherol, corresponding to the then-measured relative potency of stereoisomers.
Food and supplement labels still generally use IU, but IU can be converted to the more useful retinol activity equivalent as follows: [19] 1 μg RAE = 3.33 IU retinol; 1 IU retinol = 0.3 μg RAE; 1 IU β-carotene from supplements = 0.3 μg RAE; 1 IU β-carotene from food = 0.05 μg RAE; 1 IU α-carotene or β-cryptoxanthin from food = 0.025 μg ...
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= 205.196 548 3 mg carat (metric) ct ≡ 200 mg = 200 mg clove: ≡ 8 lb av = 3.628 738 96 kg: crith: ≡ mass of 1 L of hydrogen gas at STP: ≈ 89.9349 mg dalton: Da 1/12 the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest: ≈ 1.660 539 068 92 (52) × 10 −27 kg [20] dram (apothecary ...
On Kirkwood Avenue, there's Nick's English Hut, at 423 E. Kirkwood Ave. Nick's has plenty of screens and food in the two-story restaurant and bar known to many IU students and alumni for ...