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3.961 Aktuelle Fachpublikationen zum Thema temperature

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Crystal and magnetic structures of the brownmillerite Ca2Cr2O5

27.02.2015 | Angel M. Arevalo-Lopez; J. Paul Attfield, Dalton Transactions, 2015

Powder neutron diffraction and magnetic susceptibility measurements at 10–300 K have been used to determine the crystal and magnetic structures of brownmillerite type Ca2Cr2O5, which was obtained by reduction of the high pressure phase CaCrO3 through hard–soft chemistry. The ambient temperature ...

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Exploring the Structure and Phase Behavior of Plasma Membrane Vesicles under Extreme Environmental Conditions

26.02.2015 | Janine Seeliger; Erwin Nelli; Christopher Rosin; Marie Kahse; Katrin Weise; Roland Winter, Physical Chemistry Chemical Physics, 2015

Not only drastic temperature- but also pressure-induced perturbations of membrane organization pose a serious challenge for the biological cell. Although high hydrostatic pressure significantly influences the structural properties and thus functional characteristics of cells, this has not ...

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Combined Effects of Temperature, Pressure, and Co‐Solvents on the Polymerization Kinetics of Actin

20.02.2015 | Christopher Rosin, Kathrin Estel, Jessica Hälker, Roland Winter, ChemPhysChem, 2015

Abstract In vivo studies have shown that the cytoskeleton of cells is very sensitive to changes in temperature and pressure. In particular, actin filaments get depolymerized when pressure is increased up to several hundred bars, conditions that are easily encountered in the deep sea. We ...

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Governing Chemistry of Cellulose Hydrolysis in Supercritical Water

20.02.2015 | Danilo A. Cantero, M. Dolores Bermejo, M. José Cocero, ChemSusChem, 2015

Abstract At extremely low reaction times (0.02 s), cellulose was hydrolyzed in supercritical water (T=400 °C and P=25 MPa) to obtain a sugar yield higher than 95 wt %, whereas the 5‐hydroxymethylfurfural (5‐HMF) yield was lower than 0.01 wt %. If the reaction time was increased to 1 s, the ...

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Tetracyanido(difluorido)phosphates M+[PF2(CN)4]−

20.02.2015 | Jonas Bresien, Stefan Ellinger, Jörg Harloff, Axel Schulz, Katharina Sievert, Alrik Stoffers, Christoph Täschler, Al ..., Angewandte Chemie International Edition, 2015

Abstract The systematic study of the reaction of M[PF6] salts and Me3SiCN led to a synthetic method for the synthesis and isolation of a series of salts containing the unprecedented [PF2(CN)4]− ion in good yields. The reaction temperature, pressure, and stoichiometry were optimized. The ...

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Muonium Addition Reactions and Kinetic Isotope Effects in the Gas Phase: k∞ Rate Constants for Mu + C2H2

20.02.2015 | Donald J. Arseneau; David M. Garner; Ivan D. Reid; Donald G. Fleming, Journal of Physical Chemistry A, 2015

The kinetics of the addition reaction of muonium (Mu) to acetylene have been studied in the gas phase at N2 moderator pressures mainly from ∼800 to 1000 Torr and over the temperature range from 168 to 446 K, but also down to 200 Torr at 168 K and over a much higher range of pressures, from 10 to ...

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Solubility of 3,3′-(Oxidi-2,1-ethanediyl)bis[1-methyl-imidazolium] Dihexafluorophosphate in Water, Methanol, Ethanol, Acetone, and Acetonitrile and Binary Mixtures (Water + DMF) from (283.00 to 323.00) K

20.02.2015 | Jia-rong Guo; Bin Xu; Yan Wang; Ling-hua Zhuang; Guo-wei Wang, Journal of Chemical & Engineering Data, 2015

3,3′-(Oxidi-2,1-ethanediyl)bis[1-methyl-imidazolium] dihexafluorophosphate ([C4O(mim)2][PF6]2) was synthesized and confirmed with 1H NMR and FT-IR. The thermal stability of [C4O(mim)2][PF6]2 was studied with differential scanning calorimetry and thermogravimetric analyses. Using the dynamic ...

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Experimental characterization and numerical assessment of fatigue crack growth under thermo‐mechanical conditions

18.02.2015 | T. Schlitzer, K. Bauerbach, H. T. Beier, M. Fischaleck, K. Langschwager, M. Oechsner, J. Rudolph, A. Scholz, M. Vorm ..., Materialwissenschaft und Werkstofftechnik, 2015

The fatigue behavior of the austenitic stainless steel X6CrNiNb18‐10 (1.4550, AISI 347) is investigated. Experimental data are generated at room temperature, at elevated temperatures and further under thermo‐mechanical conditions. Research is focused on generating data for parameter ...

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Dissociation of 1,1,1-Trifluoroethane Is an Intrinsic RRKM Process: Classical Trajectories and Successful Master Equation Modeling

18.02.2015 | Akira Matsugi, Journal of Physical Chemistry A, 2015

Rate constants for thermal decomposition of 1,1,1-trifluoroethane (CH3CF3) in the high-temperature falloff region were previously reported to have an unusual pressure dependence that could not be explained by Rice–Ramsperger–Kassel–Marcus (RRKM) theory in combination with unimolecular master ...

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CO2 Hydrogenation Catalyzed by Iridium Complexes with a Proton-Responsive Ligand

18.02.2015 | Naoya Onishi; Shaoan Xu; Yuichi Manaka; Yuki Suna; Wan-Hui Wang; James T. Muckerman; Etsuko Fujita; Yuichiro Himeda, Inorganic Chemistry, 2015

The catalytic cycle for the production of formic acid by CO2 hydrogenation and the reverse reaction have received renewed attention because they are viewed as offering a viable scheme for hydrogen storage and release. In this Forum Article, CO2 hydrogenation catalyzed by iridium complexes bearing ...

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