Photosensitized Oxidation of 5-Methyl-2‘-deoxycytidine by 2-Methyl-1,4-naphthoquinone:  Characterization of 5-(Hydroperoxymethyl)-2‘-deoxycytidine and Stable Methyl Group Oxidation Products§

1996 ◽  
Vol 118 (46) ◽  
pp. 11406-11411 ◽  
Author(s):  
Carine Bienvenu ◽  
J. Richard Wagner ◽  
Jean Cadet
Keyword(s):  
Oxidation Products ◽  
Photosensitized Oxidation ◽  
Methyl Group ◽  
Methyl Group Oxidation

Oxidation of Toluene Over V2O5-Sb2O3/TiO2 Catalysts. Enhancement of Selectivity Towards Benzoic Acid

1996 ◽  
Vol 61 (11) ◽  
pp. 1675-1680 ◽  
Author(s):  
Marcel Antol ◽  
Alexander Kaszonyi ◽  
Milan Hronec
Keyword(s):  
Carbon Dioxide ◽  
Benzoic Acid ◽  
Oxidation Products ◽  
Temperature Programmed Reduction ◽  
Reaction Parameters ◽  
Toluene Oxidation ◽  
Methyl Group ◽  
Temperature Programmed ◽  
Positive Effect ◽  
Methyl Group Oxidation

The effect of reaction parameters, additives and cooxidants on the selectivity of toluene oxidation to benzoic acid in the vapor phase has been studied. The presence of ethanol as cooxidant in the reaction stream does not improve the selectivity of toluene oxidation towards partial oxidation products via methyl group oxidation. However, the presence of carbon dioxide has a positive effect on the selectivity to benzoic acid formation. The catalysts were characterized by temperature programmed reduction.

Characterization of Non-volatile Oxidation Products Formed from Triolein in a Model Study at Frying Temperature

2021 ◽  
Vol 69 (11) ◽  
pp. 3466-3478
Author(s):  
Sílvia Petronilho ◽  
Bruna Neves ◽  
Tânia Melo ◽  
Sara Oliveira ◽  
Eliana Alves ◽  
...  
Keyword(s):  
Oxidation Products ◽  
Frying Temperature ◽  
Model Study ◽  
Volatile Oxidation Products

scholarly journals STABILITY OF CODEINE: CHARACTERIZATION OF OXIDATION PRODUCTS OF CODEINE FORMED IN AQUEOUS SOLUTION

2013 ◽  
Vol 4 (7) ◽  
pp. 49-54
Author(s):  
Elahaj Babiker Mohamed ◽  
Shehab Naglaa Ahmed ◽  
Ali Heyam Saad
Keyword(s):  
Aqueous Solution ◽  
Oxidation Products

A Methyl Group Bridging on Three Metal Atoms. Solid-State and Solution Structural Characterization of the [Re3(μ-H)3(μ3-CH3)(CO)9]-Anion

1999 ◽  
Vol 121 (10) ◽  
pp. 2307-2308 ◽  
Author(s):  
T. Beringhelli ◽  
G. D'Alfonso ◽  
M. Panigati ◽  
F. Porta ◽  
P. Mercandelli ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Characterization ◽  
Methyl Group ◽  
Metal Atoms

HPLC method for quantification and characterization of cholesterol and its oxidation products in eggs

Lipids ◽  
2006 ◽  
Vol 41 (6) ◽  
pp. 615-622 ◽  
Author(s):  
Mônica R. Mazalli ◽  
Alexandra C. H. F. Sawaya ◽  
Marcos N. Eberlin ◽  
Neura Bragagnolo
Keyword(s):  
Hplc Method ◽  
Oxidation Products

scholarly journals Synthesis and spectral characterization of novel 1,5-benzodiazepine oxime derivatives

2019 ◽  
Vol 84 (4) ◽  
pp. 343-353
Author(s):  
Lina Rekovic ◽  
Lidija Kosychova ◽  
Irina Bratkovskaja ◽  
Regina Vidziunaite
Keyword(s):  
Nitrogen Atom ◽  
Fluorescence Spectroscopy ◽  
Organic Solvent ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Methyl Group ◽  
Oxime Derivatives ◽  
New Compounds

Three new 1,3,4,5-tetrahydro-2H-1,5-benzodiazepin-2-one oximes were synthesized and characterized by the methods of 1H- and 13C-NMR, IR and elemental analysis. Along with previously described compounds bearing one additional methyl group on the 5th nitrogen atom, the new compounds were characterized in bulk by UV?Vis and fluorescence spectroscopy in various solvents. The influence of the nature of the organic solvent on the spectra of the title compounds was investigated and is discussed.

scholarly journals Controlled nitric oxide production via O(<sup>1</sup>D)+N<sub>2</sub>O reactions for use in oxidation flow reactor studies

2017 ◽  
Author(s):  
Andrew Lambe ◽  
Paola Massoli ◽  
Xuan Zhang ◽  
Manjula Canagaratna ◽  
John Nowak ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Flow Reactor ◽  
Branching Ratio ◽  
Oxidation Products ◽  
Oh Radicals ◽  
Ionization Mass ◽  
Flow Reactors ◽  
Oxidative Aging ◽  
Gas Phase Oxidation

Abstract. Oxidation flow reactors that use low-pressure mercury lamps to produce hydroxyl (OH) radicals are an emerging technique for studying the oxidative aging of organic aerosols. Here, ozone (O3) is photolyzed at 254 nm to produce O(1D) radicals, which react with water vapor to produce OH. However, the need to use parts-per-million levels of O3 hinders the ability of oxidation flow reactors to simulate NOx-dependent SOA formation pathways. Simple addition of nitric oxide (NO) results in fast conversion of NOx (NO + NO2) to nitric acid (HNO3), making it impossible to sustain NO at levels that are sufficient to compete with hydroperoxy (HO2) radicals as a sink for organic peroxy (RO2) radicals. We developed a new method that is well suited to the characterization of NOx-dependent SOA formation pathways in oxidation flow reactors. NO and NO2 are produced via the reaction O(1D) + N2O→ 2NO, followed by the reaction NO + O3 → NO2+ O2. Laboratory measurements coupled with photochemical model simulations suggest that O(1D) + N2O reactions can be used to systematically vary the relative branching ratio of RO2 + NO reactions relative to RO2 + HO2 and/or RO2 + RO2 reactions over a range of conditions relevant to atmospheric SOA formation. We demonstrate proof of concept using high-resolution time-of-flight chemical ionization mass spectrometer (HR-ToF-CIMS) measurements with nitrate (NO3−) reagent ion to detect gas-phase oxidation products of isoprene and α-pinene previously observed in NOx-influenced environments and in laboratory chamber experiments.

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