نتایج جستجو برای: dismutation

تعداد نتایج: 364  

Journal: :Catalysts 2021

Chlorodifluoromethane (R-22), the most abundant freon in atmosphere, was subjected to successful hydrodechlorination presence of palladium supported on ?-alumina, at a relatively low reaction temperature (180 °C). The combination catalytic actions alumina (performing dismutation) and Pd nanoparticles (catalyzing C–Cl bond splitting hydrogen) results transformation into valuable, chlorine-free p...

Journal: :The Journal of biological chemistry 1949
E RACKER

The dismutation of acetaldehyde to ethyl alcohol and acetic acid has been shown to occur in animal tissues (1, 2). The dependence of this reaction on diphosphopyridine nucleotide was demonstrated by von Euler and Brunius (3). Partial purification of the responsible enzyme system was achieved by Dixon and Lutwak-Mann (4). These authors clearly demonstrated that the mutase activity was independen...

2018
Tanmoy Halder Gouranga Upadhyaya Chandra Basak Arup Das Chandrima Chakraborty Sudipta Ray

Environmental stresses generate reactive oxygen species (ROS) which might be detrimental to the plants when produced in an uncontrolled way. However, the plants ameliorate such stresses by synthesizing antioxidants and enzymes responsible for the dismutation of ROS. Additionally, the dehydrins were also able to protect the inactivation of the enzyme lactate dehydrogenase against hydroxyl radica...

2015
Charlotte I. Carlström Dana Loutey Stefan Bauer Iain C. Clark Robert A. Rohde Anthony T. Iavarone Lauren Lucas John D. Coates

UNLABELLED The pathways involved in aromatic compound oxidation under perchlorate and chlorate [collectively known as (per)chlorate]-reducing conditions are poorly understood. Previous studies suggest that these are oxygenase-dependent pathways involving O2 biogenically produced during (per)chlorate respiration. Recently, we described Sedimenticola selenatireducens CUZ and Dechloromarinus chlor...

Journal: :Hypertension 1999
M McIntyre D F Bohr A F Dominiczak

Much attention has been focused on the role of nitric oxide in hypertension and cardiovascular disease. More recently, the role of superoxide anion and its interaction with nitric oxide has been investigated in this context. This review will concentrate on the role of superoxide in human and experimental hypertension, paying particular attention to the potential sources of superoxide within the...

Journal: :Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan 2014
Tohru Mizushima

Idiopathic pulmonary fibrosis (IPF) and chronic obstructive pulmonary disease (COPD) are thought to involve lung injury induced by reactive oxygen species (ROS), in particular superoxide anion. The enzyme, superoxide dismutase (SOD) catalyses the dismutation of superoxide anion to hydrogen peroxide. Lecithinized SOD (PC-SOD) has overcome a number of previous clinical limitations of SOD, includi...

Journal: :Biochemical and biophysical research communications 1981
J A Fee G J McClune P O'Neill E M Fielden

The iron containing superoxide dismutase from E. coli B is shown to catalyze superoxide dismutation by a mechanism which exhibits saturation kinetics. This behavior is quite different from that observed previously with bovine Zn/Cuand iron-containing superoxide dismutase from P. leiosnathi. Two parameters of catalysis were measured in the pH range 7.2 to 10.4: k was found to be independent of p...

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