Results 261 to 270 of about 10,401,391 (311)

The catalytic mechanism of the hairpin ribozyme

Biochemical Society Transactions, 2002
Evidence that hairpin ribozymes function in the absence of bivalent cation cofactors suggests that active site nucleobases might participate directly in catalytic chemistry. We have adopted an abasic ribozyme rescue strategy to begin to dissect the roles of specific nucleobases in hairpin ribozyme activity. Loss of one active site nucleobase, G8, could
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The complete catalytic mechanism of xanthine oxidase: a computational study

, 2020
In this article, quantum mechanical/molecular mechanical (QM/MM) methods were used to study the full catalytic mechanism of xanthine oxidase (XO).
P. G. F. Ribeiro, H. S. Fernandes, L. Maia, S. Sousa, J. Moura, N. Cerqueira   +5 more
semanticscholar   +1 more source

High efficiency heterogeneous Fenton-like catalyst biochar modified CuFeO2 for the degradation of tetracycline: Economical synthesis, catalytic performance and mechanism

Applied Catalysis B: Environmental, 2021
The heterogeneous Fenton-like catalysts biochar modified CuFeO2 (CuFeO2/BC) were fabricated by hydrothermal method without additional chemical reducing agent. The systematic characterization demonstrated that higher CuFeO2 particles dispersion and larger
Shuaishuai Xin, Guocheng Liu, Xiao-Hang Ma, Jiaxin Gong, Bingrui Ma, Qinghua Yan, Qinghua Chen, Dong Ma, Guangshan Zhang, Meng-Chun Gao, Yan-Jun Xin   +10 more
semanticscholar   +1 more source

The Catalytic Mechanism of Peroxiredoxins

2007
Peroxiredoxins carry out the efficient reduction of a typically broad range of peroxide substrates through an absolutely conserved, activated cysteine residue within a highly conserved active site pocket structure. Though details of reductive recycling after cysteine sulfenic acid formation at the active site vary among members of different Prx classes,
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Catalytic mechanism of tyrosinases

Tyrosinases (TYR) play a key role in melanin biosynthesis by catalyzing two reactions: monophenolase and diphenolase activities. Despite low amino acid sequence homology, TYRs from various organisms (from bacteria to humans) have similar active site architectures and catalytic mechanisms. The active site of the TYRs contains two copper ions coordinated
Samaneh, Zolghadri, Ali Akbar, Saboury
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The Quasicatalytic Mechanism: A Variation of the Catalytic (EC′) Mechanism

Analytical Chemistry, 2009
The classic electrochemical catalytic mechanism, often referred to as the EC' mechanism, is traditionally represented by the two reactions A + e B (E(A/B)(0), k(A/B)(0), alpha(A/B)) and B + P A + Q (K(eq), k(f), k(b)). Implicit in this mechanism is the additional heterogeneous electron transfer P + e Q (E(P/Q)(0), k(P/Q)(0), alpha(P/Q)).
Stephen W, Feldberg, Jennifer F, Campbell   +1 more
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The Catalytic Mechanism of Hamster Dihydroorotase

1995
Dihydroorotase catalyses the third reaction of the pathway for de novo biosynthesis of pyrimidine nucleotides. The reaction catalysed involves an intramolecular ring closure of N-carbamyl-L-aspartate (CA-asp) to form L-dihydroorotate (DHO), a dihydropyrimidine.
N K, Williams, E L, Isaac, Y, Peide, R I, Christopherson   +3 more
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Structure and Catalytic Mechanism of Heme Oxygenase

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Masaki, Unno, Toshitaka, Matsui, Masao, Ikeda-Saito   +2 more
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Catalytic reactions—I Mechanisms

Talanta, 1970
The mechanisms of some reactions used in catalytic analysis are discussed. The knowledge of the mechanism of a catalytic reaction can help in the development of new catalytic reactions and the choice of optimal conditions, and to show the possibilities for further increases in sensitivity.
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Heterogeneous activation of peroxymonosulfate by different ferromanganese oxides for tetracycline degradation: Structure dependence and catalytic mechanism

Chemical Engineering Journal, 2018
In this work, ferromanganese oxides (FMOs) synthesized with different Fe and Mn ratio using sol–gel method showed good activity in the activation of peroxymonosulfate (PMS) for tetracycline degradation.
Qin-Xue Yang, Xiaofang Yang, Ying Yan, Chu-xiao Sun, Han-Jun Wu, Jie He, Dongsheng Wang   +6 more
semanticscholar   +1 more source