scholarly journals EFFECT OF pH UPON THE REACTION KINETICS OF THE ENZYME-SUBSTRATE COMPOUNDS OF CATALASE

1952 ◽  
Vol 194 (2) ◽  
pp. 471-481 ◽  
Author(s):  
Britton. Chance
Keyword(s):  
Reaction Kinetics ◽  
Effect Of Ph ◽  
Enzyme Substrate ◽  
Kinetics Of

scholarly journals The effect of pH on the kinetics of arylsulphatases A and B

1983 ◽  
Vol 213 (3) ◽  
pp. 603-607 ◽  
Author(s):  
C O'Fagain ◽  
B M Butler ◽  
T J Mantle
Keyword(s):  
Enzyme Activity ◽  
Rat Liver ◽  
Substrate Binding ◽  
Acid Base ◽  
Effect Of Ph ◽  
Substrate Complex ◽  
Enzyme Substrate ◽  
General Acid ◽  
Kinetics Of

The effect of pH on the kinetics of rat liver arylsulphatases A and B is very similar and shows that two groups with pK values of 4.4-4.5 and 5.7-5.8 are important for enzyme activity. Substrate binding has no effect on the group with a pK of 4.4-4.5; however, the pK of the second group is shifted to 7.1-7.5 in the enzyme-substrate complex. An analysis of the effect of pH on the Ki for sulphate inhibition suggests that HSO4-is the true product. A model is proposed that involves the two ionizing groups identified in the present study in a concerted general acid-base-catalysed mechanism.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

Chemical Analysis and Reaction Kinetics of EA-2192 in Decontamination Solution for the MMD-1 Project

2003 ◽  
Author(s):  
David J. McGarvey ◽  
H. D. Durst ◽  
William R. Creasy ◽  
Jill L. Ruth ◽  
Kevin M. Morrissey
Keyword(s):  
Chemical Analysis ◽  
Reaction Kinetics ◽  
Kinetics Of ◽  
Decontamination Solution

Kinetics of catalytic conversion of methanol at higher pressures

1980 ◽  
Vol 45 (12) ◽  
pp. 3402-3407 ◽  
Author(s):  
Jaroslav Bartoň ◽  
Vladimír Pour
Keyword(s):  
Low Temperature ◽  
Reaction Kinetics ◽  
Water Vapour ◽  
Kinetic Data ◽  
Catalytic Conversion ◽  
The Given ◽  
Kinetics Of

The course of the conversion of methanol with water vapour was followed on a low-temperature Cu-Zn-Cr-Al catalyst at pressures of 0.2 and 0.6 MPa. The kinetic data were evaluated together with those obtained at 0.1 MPa and the following equation for the reaction kinetics at the given conditions was derived: r = [p(CH3OH)p(H2O)]0.5[p(H2)]-1.3.

Halides of Macrocyclic Silver(II) Complexes: Crystal Structures with Hydrogen Bond Network and Reaction Kinetics of the Decomposition

2021 ◽  
pp. 120431
Author(s):  
Akinori Honda ◽  
Shunta Kakihara ◽  
Shuhei Ichimura ◽  
Kazuaki Tomono ◽  
Mina Matsushita ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Reaction Kinetics ◽  
Crystal Structures ◽  
Hydrogen Bond Network ◽  
Bond Network ◽  
Kinetics Of
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