katal


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katal

 [kat´al]
a unit of measurement proposed to express activities of all catalysts, including enzymes, being that amount of a catalyst that catalyzes a reaction rate of 1 mole of substrate per second. Symbol kat.

kat·al (kat),

(kat'ăl),
1. Unit of catalytic activity equal to 1 mol of product formed (or substrate consumed) per second.
2. The amount of enzyme that catalyzes transformation of 1 mol of substrate per second.

katal

/kat·al/ (kat´al) a unit of measurement proposed to express activities of all catalysts, being that amount of a catalyst that catalyzes a reaction rate of 1 mole of substrate per second. Symbol kat.

katal (K, kat)

[kat′al]
Etymology: Gk, kata, down
an enzyme unit in moles per second defined by the SI system: 1 K |m= 6.6 × 109 U.

kat·al

(kat) (kat'ăl)
Unit of catalytic activity equal to one mole of product formed (or substrate consumed) per second, as of the amount of enzyme that catalyzes transformation of one mole of substrate per second.

katal

A unit of enzyme activity in the SI system. 1 international unit is equal to 16.6 nanokatal.

katal

the SI unit of measurement to express activities of all catalysts, including enzymes, being that amount of a catalyst that catalyzes a reaction rate of 1 mole of substrate per second. Symbol kat.
References in periodicals archive ?
This setback did not hinder the adoption of the katal by a few journals, certificates on enzyme reference materials from the European Community Bureau of Reference (BCR), the European Pharmacopoeia (22), the NPAC / IFCC Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences (20), and notably the IUPAC/IFCC database of thousands of systematic terms for properties, including those with enzyme analytes (23).
The spread of the katal in routine medical laboratory reporting, however, has been sporadic, and apart from general inertia, the argument was often advanced that the special term lacked adoption by CGPM for use with the SI.
Consequently, the IFCC/NPAC Committee/Commission on Nomenclature, Properties and Units formulated an official IFCC petition, 1998-05, to the CIPM (24), arguing that the term katal (a) suggests a property of a catalyst rather than of a chemical reaction; (b) allows the presentation of values in laboratory medicine of, e.
In the end, the CCU penned Recommendation U 1 (1998) 'Special name for the SI unit mole per second, the katal, for the expression of catalytic activity' [page 54 in Ref.