TY - JOUR
T1 - Decomposition of hydrogen peroxide by haemin. Dependence of the reaction velocity on pH in the alkaline range
AU - Gatt, Ruth
AU - Kremer, Mordechai L.
PY - 1968
Y1 - 1968
N2 - The rate of the haemin-catalyzed decomposition of H2O 2 decreases with increasing pH in weakly alkaline solutions. The decrease is due to the acid dissociation of haemin, the anion form being catalytically inactive. The dissociation constant is 2.4 × 10-7 M. The rate constants of the association of haemin with peroxide and of its reverse process were calculated as 1.6 × 106M-1 min-1 and 3 × 108 min-1 respectively. The ineffective coupling of rate constants in haemin, as contrasted with catalase, is discussed.
AB - The rate of the haemin-catalyzed decomposition of H2O 2 decreases with increasing pH in weakly alkaline solutions. The decrease is due to the acid dissociation of haemin, the anion form being catalytically inactive. The dissociation constant is 2.4 × 10-7 M. The rate constants of the association of haemin with peroxide and of its reverse process were calculated as 1.6 × 106M-1 min-1 and 3 × 108 min-1 respectively. The ineffective coupling of rate constants in haemin, as contrasted with catalase, is discussed.
UR - http://www.scopus.com/inward/record.url?scp=0037653551&partnerID=8YFLogxK
U2 - 10.1039/TF9686400721
DO - 10.1039/TF9686400721
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AN - SCOPUS:0037653551
SN - 0014-7672
VL - 64
SP - 721
EP - 726
JO - Transactions of the Faraday Society
JF - Transactions of the Faraday Society
ER -