Role of the Epoxy Group in the Heterogeneous CO2Evolution in Carbon Oxidation Reactions

2007 ◽  
Vol 111 (2) ◽  
pp. 612-617 ◽  
Author(s):  
Astrid Sánchez ◽  
Fanor Mondragón
Keyword(s):  
Epoxy Group ◽  
Carbon Oxidation ◽  
Oxidation Reactions

Synthesis of YFeO3-δ and LaFeO3-δ Perovskites with High Catalytic Activity in Carbon Oxidation Reactions

2021 ◽  
Vol 316 ◽  
pp. 105-109
Author(s):  
Evgeny A. Kirichenko ◽  
Pavel G. Chigrin ◽  
Anton A. Gnidenko
Keyword(s):  
Oxidation Mechanism ◽  
Soot Oxidation ◽  
Complex Oxide ◽  
Maximum Temperature ◽  
High Catalytic Activity ◽  
Carbon Oxidation ◽  
Oxidation Reactions ◽  
Oxide Systems ◽  
Reduction Of Metal Oxides ◽  
Catalytic Reaction Mechanism

YFeO3-δ (δ = 0.26) and LaFeO3-δ (δ = 0.5) perovskites with a high specific surface and oxygen non-stoichiometry was firstly synthesized by pyrolysis of polymer-salt compositions. It was shown that the catalytic oxidation of carbon in the presence of these complex oxide systems proceeds in the range of 400 - 700 °С, with a maximum temperature at 556 °С for YFeO3-δ; and 380 - 620 °С ,with a maximum temperature at 501 °С for LaFeO3-δ, in one-stage mode for both. By means of thermal analysis and diffractometry, it was shown that there is no contribution to the soot oxidation mechanism by cyclic perovskite surface transformations, due to the reduction of metal oxides by the soot and their subsequent reoxidation. It has been established that the basis of the catalytic reaction mechanism for both perovskites is the presence of oxygen vacancies on the surface of complex oxides.

The Role of Cytochrome P-450 in Microsomal Mixed Function Oxidation Reactions

1968 ◽  
pp. 142-195 ◽  
Author(s):  
R. W. Estabrook ◽  
A. Hildebrandt ◽  
H. Remmer ◽  
J. B. Schenkman ◽  
O. Rosenthal ◽  
...  
Keyword(s):  
Oxidation Reactions ◽  
Cytochrome P 450

Role of Gold(I) α-Oxo Carbenes in the Oxidation Reactions of Alkynes Catalyzed by Gold(I) Complexes

2014 ◽  
Vol 136 (32) ◽  
pp. 11513-11523 ◽  
Author(s):  
Jiří Schulz ◽  
Lucie Jašíková ◽  
Anton Škríba ◽  
Jana Roithová
Keyword(s):  
Oxidation Reactions

Carbon oxidation reactions could misguide the evaluation of carbon black-based oxygen-evolution electrocatalysts

2017 ◽  
Vol 53 (84) ◽  
pp. 11556-11559 ◽  
Author(s):  
Wang Wang ◽  
Jin Luo ◽  
Shengli Chen
Keyword(s):  
Carbon Black ◽  
Oxygen Evolution ◽  
Carbon Oxidation ◽  
Oxidation Reactions

Carbon may suffer severe oxidation during OER, leading to overestimation of the activity of carbon-black based electrocatalysts towards OER.

scholarly journals Efficient and Error-Free Replication past a Minor-Groove N2-Guanine Adduct by the Sequential Action of Yeast Rev1 and DNA Polymerase ζ

2004 ◽  
Vol 24 (16) ◽  
pp. 6900-6906 ◽  
Author(s):  
M. Todd Washington ◽  
Irina G. Minko ◽  
Robert E. Johnson ◽  
Lajos Haracska ◽  
Thomas M. Harris ◽  
...  
Keyword(s):  
Dna Polymerase ◽  
Close Contact ◽  
Dna Polymerases ◽  
Minor Groove ◽  
Synthetic Activity ◽  
Oxidation Reactions ◽  
Lesion Bypass ◽  
Dna Minor Groove

ABSTRACT Rev1, a member of the Y family of DNA polymerases, functions in lesion bypass together with DNA polymerase ζ (Polζ). Rev1 is a highly specialized enzyme in that it incorporates only a C opposite template G. While Rev1 plays an indispensable structural role in Polζ-dependent lesion bypass, the role of its DNA synthetic activity in lesion bypass has remained unclear. Since interactions of DNA polymerases with the DNA minor groove contribute to the nearly equivalent efficiencies and fidelities of nucleotide incorporation opposite each of the four template bases, here we examine the possibility that unlike other DNA polymerases, Rev1 does not come into close contact with the minor groove of the incipient base pair, and that enables it to incorporate a C opposite the N 2-adducted guanines in DNA. To test this idea, we examined whether Rev1 could incorporate a C opposite the γ-hydroxy-1,N 2-propano-2′deoxyguanosine DNA minor-groove adduct, which is formed from the reaction of acrolein with the N 2 of guanine. Acrolein, an α,β-unsaturated aldehyde, is generated in vivo as the end product of lipid peroxidation and from other oxidation reactions. We show here that Rev1 efficiently incorporates a C opposite this adduct from which Polζ subsequently extends, thereby completing the lesion bypass reaction. Based upon these observations, we suggest that an important role of the Rev1 DNA synthetic activity in lesion bypass is to incorporate a C opposite the various N 2-guanine DNA minor-groove adducts that form in DNA.

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