Results 221 to 230 of about 177,698 (261)

Catalase activity in equine semen

American Journal of Veterinary Research, 2000
Abstract Objective —To characterize the activity of catalase in equine semen. Animals —15 stallions of known and unknown reproductive history. Procedure
B A, Ball, C G, Gravance, V, Medina, J, Baumber, I K, Liu   +4 more
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Catalase activity of activated sludge

Toxicological & Environmental Chemistry, 1984
Catalase activity of mixed liquor suspended solids of aeration tank of activated sludge plants in Milwaukee, WI, was measured in sonicated samples. Catalase activity varied in the samples of mixed liquor suspended solids collected from the head and end of the aeration tanks; in return activated sludge; and in waste activated sludge.
Kasi V. Gabbita, Jerry Y.C. Hzuang
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Activity of catalase in the red cell

Biochimica et Biophysica Acta (BBA) - Enzymology and Biological Oxidation, 1965
Summary The activity of catalase (H2O2:H2O2 oxidoreductase, EC 1.11.1.6) in the horse erythrocyte and its ability to protect haemoglobin against oxidation by peroxide have been studied. Both catalase and haemoglobin are shielded by a permeability barrier in the intact cell, presumably the red-cell membrane.
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Distal Site Aspartate Is Essential in the Catalase Activity of Catalase-Peroxidases

Biochemistry, 2003
Structural and biochemical characterization of aspartate 152 at the distal heme side of catalase-peroxidase (KatG) from Synechocystis PCC 6803 reveals an important functional role for this residue. In the wild-type protein, the side chain carboxyl group of Asp152 is 7.8 A apart from the heme iron and is hydrogen-bonded to two water molecules and a KatG-
Christa, Jakopitsch, Markus, Auer, Günther, Regelsberger, Walter, Jantschko, Paul Georg, Furtmüller, Florian, Rüker, Christian, Obinger   +6 more
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Independent activity of catalase haematins

Journal of Theoretical Biology, 1970
Abstract The peroxidatic mechanism for the catalytic reaction and for peroxidation has been extended from haematin basis to include the catalase molecule as a whole. It has been shown that interaction among single haematin units does not affect the form of the rate equations for the catalatic reaction.
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Catalase activity in wastewater

Water Research, 1994
Abstract Catalase is a cellular enzyme produced during oxidative metabolism of aerobic living systems which degrades toxic hydrogen peroxide produced during oxidative metabolism in cells. Measurements of catalase permit the study of organic change and microbial density.
B.B. Hosetti, S. Frost
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Heme-dependent catalase activity of lactobacilli

International Journal of Food Microbiology, 1991
The heme-dependent catalase in Lactobacillus pentosus, L. sake, L. delbrueckii and Enterococcus faecalis was studied. The catalase was formed by cells grown aerobically in the presence of hematin or for lactobacilli when grown without added hematin, after incubation of buffered cells in the presence of hematin.
G, Wolf, A, Strahl, J, Meisel, W P, Hammes   +3 more
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Mechanisms of catalase activity of heme peroxidases

Archives of Biochemistry and Biophysics, 2010
In the absence of exogenous electron donors monofunctional heme peroxidases can slowly degrade hydrogen peroxide following a mechanism different from monofunctional catalases. This pseudo-catalase cycle involves several redox intermediates including Compounds I, II and III, hydrogen peroxide reduction and oxidation reactions as well as release of both ...
Jutta, Vlasits, Christa, Jakopitsch, Margit, Bernroitner, Marcel, Zamocky, Paul G, Furtmüller, Christian, Obinger   +5 more
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Catalase activity in electrically stimulated muscle

Experientia, 1980
10 min of electrical stimulation resulted in a significant rise in gastrocnemius catalase activity.
R R, Jenkins, D, Newsham
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Hormonal influences on liver catalase activity

Archives of Biochemistry and Biophysics, 1956
Abstract Cortisone and hydrocortisone were found to produce a marked reduction in rat liver catalase activity, but there was no change in the activity of this enzyme in adrenalectomized rats maintained on sodium chloride. Contrary to expectations, ACTH did not alter liver catalase, even in doses of 6 mg./day.
R C, TROOP, A J, STANLEY
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