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14.012 Aktuelle Fachpublikationen zum Thema temperature

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Kinetic Analysis of Nitroxide Radical Formation Under Oxygenated Photolysis: Toward Quantitative Singlet Oxygen Topology

22.10.2014 | Malcolm Forbes; David F Zigler; Eva Chuheng Ding; Renat Khatmullin; Vanessa M DiPasquale; Valery F Tarasov; R. Brend ..., Photochemical & Photobiological Sciences, 2014

Reaction kinetics for two sterically hindered secondary amines with singlet oxygen have been studied in detail. A water soluble porphyrin sensitizer, 5,10,15,20-tetrakis-(4-sulfunatophenyl)-21,23H-porphyrin (TPPS), was irradiated in oxygenated aqueous solutions containing either ...

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Insights into the reversible oxygen reduction reaction in a series of phosphonium-based ionic liquids

22.10.2014 | Cristina Pozo-Gonzalo; Patrick C. Howlett; Jennifer L. Hodgson; Louis A. Madsen; Douglas R. MacFarlane; Maria Forsyth, Physical Chemistry Chemical Physics, 2014

New findings supporting the stability of the superoxide ion, O2˙−, in the presence of the phosphonium cation, [P6,6,6,14]+, are presented. Extended electrochemical investigations of a series of neat phosphonium-based ILs with different anions, including chloride, bis(trifluoromethylsulfonyl)imide ...

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Hydration of Cyanide Anion: An Ab Initio Quantum Mechanical Charge Field Molecular Dynamics Study

22.10.2014 | Syed Tarique Moin; Thomas Hofer, Physical Chemistry Chemical Physics, 2014

This paper presents an ab initio quantum mechanical charge field molecular dynamics simulation study of the cyanide anion CN- in aqueous solution where hydrogen bond formation plays a dominant role in the hydration process. Preferential orientation of water hydrogens compared to oxygen atoms was ...

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Porous Cobalt, Nitrogen-Codoped Carbon Nanostructures from Carbon Quantum Dots and VB12 and Their Catalytic Properties for Oxygen Reduction

21.10.2014 | zhenhui kang; Yanmei yang; Juan Liu; Yuzhi Han; Hui Huang; Naiyun Liu; yang liu, Physical Chemistry Chemical Physics, 2014

The porous cobalt, nitrogen-codoped carbon materials (Co/N/C) were synthesized by a facile one-step pyrolysis of Vitamin B12 (VB12) and carbon quantum dots (CQDs). Varying the initial mass ratio of CQDs and VB12 leads to controllable concentrations of Co (0% to 3.88%) and N (0% to 5.88%) after ...

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Theoretical Investigation of Thermodynamic Stability and Mobility of the Oxygen Vacancy in ThO2-UO2 Solid Solutions

21.10.2014 | Bin Liu; Dilpuneet Aidhy; Yanwen Zhang; William J. Weber, Physical Chemistry Chemical Physics, 2014

The thermodynamic stability and the migration energy barriers of oxygen vacancies in ThO2-UO2 solid solutions are investigated by density functional theory calculations. In pure ThO2, the formation energy of oxygen vacancy is 7.58 eV and 1.46 eV under O rich and O poor conditions, respectively, ...

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Probing the kinetic energy-release dynamics of H-atom products from the gas-phase reaction of O(3P) with vinyl radical C2H3

21.10.2014 | Su-Chan Jang; Jong-Ho Choi, Physical Chemistry Chemical Physics, 2014

The gas-phase radical–radical reaction dynamics of ground-state atomic oxygen O(3P) with vinyl radicals C2H3 has been studied by combining the results of vacuum-ultraviolet laser-induced fluorescence spectroscopy in a crossed beam configuration with ab initio calculations. The two radical ...

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Harnessing the Oxidation Susceptibility of Deubiquitinases for Inhibition with Small Molecules

20.10.2014 | Shimrit Ohayon, Maya Refua, Adi Hendler, Amir Aharoni, Ashraf Brik, Angewandte Chemie International Edition, 2014

Abstract Deubiquitinases (DUBs) counteract ubiquitination by removing or trimming ubiquitin chains to alter the signal. Their diverse role in biological processes and involvement in diseases have recently attracted great interest with regard to their mechanism and inhibition. It has been shown ...

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Activation of NLRP3 and AIM2 Inflammasomes in Kupffer Cells in Hepatic Ischemia/Reperfusion

18.10.2014 | Hyo‐Yeon Kim, Seok‐Joo Kim, Sun‐Mee Lee, FEBS Journal, 2014

Abstract Inflammasome activation by danger signals in ischemia/reperfusion (I/R) injury is responsible for the sterile inflammatory response. Signals triggering formation and activation of the inflammasome involve the generation of oxidative stress. The aim of this study was to examine the ...

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Blood Ties: Co3O4 Decorated Blood Derived Carbon as a Superior Bifunctional Electrocatalyst

18.10.2014 | Chao Zhang, Markus Antonietti, Tim‐Patrick Fellinger, Advanced Functional Materials, 2014

A simple, versatile and cheap synthetic route is demonstrated for the preparation of Co3O4 decorated blood powder derived heteroatom doped porous carbon (BDHC). The inorganic hybrid performs well as an advanced bifunctional non‐precious metal electrocatalyst. The hybridization of Co3O4 with the ...

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Hypoxia interferes with aryl hydrocarbon receptor pathway in hCMEC/D3 human cerebral microvascular endothelial cells

18.10.2014 | Aude Jacob, Sophie Potin, Bruno Saubaméa, Dominique Crete, Jean‐Michel Scherrmann, Emmanuel Curis, Carole Peyssonnau ..., Journal of Neurochemistry, 2014

Abstract The expression of aryl hydrocarbon receptor (AhR) transcription factor was detected at transcript level in freshly isolated human brain microvessels and in the hCMEC/D3 human cerebral microvascular endothelial cell line. Recent studies have demonstrated that AhR pathway is able to ...

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