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== History == The [[General Conference on Weights and Measures]] and other international organizations recommend use of the katal.<ref>{{cite web|title=SI Brochure, Table 3: Coherent derived units in the SI with special names and symbols)|url=https://www.bipm.org/en/publications/si-brochure/table3.html|access-date=2019-05-13|publisher=Bureau international des poids et mesures (BIPM)|archive-date=2019-03-21|archive-url=https://web.archive.org/web/20190321011303/https://www.bipm.org/en/publications/si-brochure/table3.html|url-status=dead}}</ref> It replaces the non-SI [[enzyme unit]] of catalytic activity. The enzyme unit is still more commonly used than the katal,<ref name=":0" /> especially in [[biochemistry]].{{citation needed|date=September 2018}}<ref>{{Cite journal |last=Dybkaer |first=Rene |date=March 2002 |title=The tortuous road to the adoption of katal for the expression of catalytic activity by the General Conference on Weights and Measures |url=https://pubmed.ncbi.nlm.nih.gov/11861460/#full-view-affiliation-1 |journal=Clinical Chemistry |volume=48 |issue=3 |pages=586β90 |pmid=11861460 |via=National Library of Medicine, National Center for Biotechnology information}}</ref> The adoption of the katal has been slow.<ref name=":0" /><ref>{{Cite journal|last=Dybkaer|first=RenΓ©|date=March 2002|title=The tortuous road to the adoption of katal for the expression of catalytic activity by the General Conference on Weights and Measures|journal=Clinical Chemistry|volume=48|issue=3|pages=586β590|doi=10.1093/clinchem/48.3.586|issn=0009-9147|pmid=11861460|doi-access=free}}</ref>
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