نتایج جستجو برای: chemical oxidation
تعداد نتایج: 482203 فیلتر نتایج به سال:
Uncovering the chemical and physical links between natural environments and microbial communities is becoming increasingly amenable owing to geochemical observations and metagenomic sequencing. At the hot spring known as Bison Pool in Yellowstone National Park, the cooling of the water in the outflow channel is associated with an increase in oxidation potential estimated from multiple field-bas...
[Cp*RuCl2(S2CR)] (R ) NMe2, NEt2, and OiPr) were synthesized by the reaction of [Cp*RuCl2]2 with [RC(S)S]2. One-electron electrochemical oxidation of [Cp*RuCl2(S2CR)] produces paramagnetic [Cp*RuCl2(S2CR)], which are stable in CH2Cl2 solution for at least several hours at 233 K. EPR experiments performed at 293 K show isotropic signals (g≈ 2.035) with clearly defined hyperfine coupling to 99Ru ...
Photochemical oxidation of aromatic hydrocarbons leads to tropospheric ozone and secondary organic aerosol (SOA) formation, with profound implications for air quality, human health, and climate. Toluene is the most abundant aromatic compound under urban environments, but its detailed chemical oxidation mechanism remains uncertain. From combined laboratory experiments and quantum chemical calcul...
Unraveling the complex interaction between catalysts and reactants under operando conditions is a key step toward gaining fundamental insight in catalysis. We report the evolution of the structure and chemical composition of size-selected micellar Pt nanoparticles (∼1 nm) supported on nanocrystalline γ-Al(2)O(3) during the catalytic oxidation of 2-propanol using X-ray absorption fine-structure ...
The formation of dityrosine of human insulin oxidized by metal-catalyzed oxidation system (H2O2/Cu) was estimated by fluorescent methods. The oxidation of tyrosine and phenylalanine residues present on the insulin molecule was evident after 2 minutes of in vitro oxidation due to the formation of protein-bound dityrosine. The success of oxidative protein modification was followed until available...
The RadFETs discussed in this paper are based on our [2] dual dielectric design of SiN over SO, The RadFETs were fabricated at the Micrel Corp. in San Jose, CA. to specifications provided by the authors. Micrel was able to use their standard p-MOSFET process with the addition of a Low Pressure Chemical Vapor Deposition (LPCVD) SIN deposition after gate oxidation to fabricate the RadFETs. Micrel...
Background & Objectives: Entering LAS through the wastewater plant’s effluent to water resources causes taste and odor changes, aquatics death, oxygen transfer limitation, and disorders in water treatment processes. Therefore, the study objective was to determine optimum conditions for fenton oxidation process to remove linear alkyl benzene sulfonate from aqueous environments using taguchi meth...
The electron impact and isobutane and ammonia chemical ionization mass spectral characteristics of the N-oxidation products of a series of 4-substituted-N-ethyl-N-methylanilines are described. The thermolability and the relative non-volatility of N-oxides of this type of tertiary aromatic amine makes their unequivocal identification by gas chromatography and electron impact mass spectrometry di...
Lactoperoxidase catalyzes the oxidation of thiocyanate by hydrogen peroxide into hypothiocyanite, a reaction which can protect bacterial and mammalian cells from killing by hydrogen peroxide. The present study demonstrates, however, that lactoperoxidase in the presence of thiocyanate can actually potentiate the bactericidal and cytotoxic effects of hydrogen peroxide under specific conditions, s...
We report in-situ production and detection of intermediates at graphenic surfaces, especially during alcohol oxidation. Alcohol oxidation to acid occurs on graphene oxide-coated paper surface, driven by an electrical potential, in a paper spray mass spectrometry experiment. As paper spray ionization is a fast process and the time scale matches with the reaction time scale, we were able to detec...
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