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2.267 Aktuelle Fachpublikationen zum Thema temperature

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TiO2/clay as a heterogeneous catalyst in photocatalytic/photochemical oxidation of anionic reactive blue 19

23.11.2014 | Author(s): Haithem Bel Hadjltaief , Maria Elena Galvez , Mourad Ben Zina , Patrick Da Costa, Arabian Journal of Chemistry, 2014

Publication date: Available online 10 November 2014 Source:Arabian Journal of Chemistry Author(s): Haithem Bel Hadjltaief , Maria Elena Galvez , Mourad Ben Zina , Patrick Da Costa A TiO2-coated Tunisian clay (TiO2–clay) was synthesized by a typical impregnation method. The ...

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Facile Synthesis of Ba1–xKxFe2As2 Superconductors via Hydride Route

21.11.2014 | Julia V. Zaikina; Maria Batuk; Artem M. Abakumov; Alexandra Navrotsky; Susan M. Kauzlarich, Journal of the American Chemical Society, 2014

We have developed a fast, easy, and scalable synthesis method for Ba1–xKxFe2As2 (0 ≤ x ≤ 1) superconductors using hydrides BaH2 and KH as a source of barium and potassium metals. Synthesis from hydrides provides better mixing and easier handling of the starting materials, consequently leading to ...

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Redox Properties of CeO2 at Low Temperature: The Direct Synthesis of Imines from Alcohol and Amine

21.11.2014 | Masazumi Tamura, Keiichi Tomishige, Angewandte Chemie International Edition, 2014

Abstract We disclosed the redox properties of CeO2 in organic reactions at low temperature of 303 K. CeO2 works as the most effective heterogeneous catalyst for imine formation from benzyl alcohol and aniline at 303 K among various metal oxides and showed more than 38‐fold higher activity than ...

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Preparation of Large Granular Cu-Based Oxygen Carriers by Mechanical Mixing for Packed Bed Chemical-Looping Combustion

17.11.2014 | Zhiqi Wang; Yongqiang Liu; Jingli Wu; Tao He; Jianqing Li; Jinghu Wu, Energy & Fuels, 2014

Large granular oxygen carriers are proposed in packed-bed chemical looping combustion (CLC) reactors to facilitate the separation of fuel residues and oxygen carriers for solid fuels (especially biomass and combustible solid wastes) and avoid very large pressure drops for gas fuels, which require ...

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Syntheses of Enantiopure Bifunctional 2-Guanidinobenzimidazole Cyclopentadienyl Ruthenium Complexes: Highly Enantioselective Organometallic Hydrogen Bond Donor Catalysts for Carbon–Carbon Bond Forming Reactions

17.11.2014 | Tathagata Mukherjee; Carola Ganzmann; Nattamai Bhuvanesh; John A. Gladysz, Organometallics, 2014

2-Guanidinobenzimidazole (GBI) derivatives with a NHR group in place of NH2 (R: a, CH2Ph; b, (SC)-CH(CH3)Ph; c, (RCRC)-CH(CH2)4CHNMe2; d, (RCRC)-CH(CH2)4CH-NCH2(CH2)3CH2) are prepared in four steps from 2-aminobenzimidazole. Reactions with [(η5-C5H5)Ru(CO)(NCCH3)2]+PF6– (5+PF6–) afford the ...

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Short-Term Coral Bleaching Is Not Recorded by Skeletal Boron Isotopes

14.11.2014 | Verena Schoepf et al., PLoS ONE, 2014

by Verena Schoepf, Malcolm T. McCulloch, Mark E. Warner, Stephen J. Levas, Yohei Matsui, Matthew D. Aschaffenburg, Andréa G. Grottoli Coral skeletal boron isotopes have been established as a proxy for seawater pH, yet it remains unclear if and how this proxy is affected by seawater temperature. ...

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Structural Evolution of GdBaCo2O5+δ (δ = 7/18) at Elevated Temperatures

14.11.2014 | Nobuo Ishizawa; Toru Asaka; Tatsunari Kudo; Koichiro Fukuda; Akira Yasuhara; Nobuyuki Abe; Taka-hisa Arima, Chemistry of Materials, 2014

The structural chemistry of the double-layered perovskite-type gadolinium barium cobaltate, GdBaCo2O5+δ (0 < δ < 1/2), is not well-known, in comparison to the representative end-member phases α at δ = 0 and β at δ = 1/2. This study unveils the structural evolution of the room-temperature stable ...

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Freeze‐drying for Microencapsulation of Turmeric Oleoresin Using Modified Starch and Gelatin

13.11.2014 | Cassia Roberta Malacrida, Sungil Ferreira, Larissa Angélica Cireli Zuanon, Vânia Regina Nicoletti Telis, Journal of Food Processing and Preservation, 2014

Abstract The aims of this study were to assess the turmeric oleoresin microencapsulation by freeze‐drying with modified starch/gelatin and to evaluate its stability during storage at different temperatures and light. Encapsulated turmeric oleoresin w stored at −20, 25 and 60C, in the absence ...

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Shock Tube Study of Dimethylamine Oxidation

12.11.2014 | Sijie Li, David F. Davidson, Ronald K. Hanson, International Journal of Chemical Kinetics, 2014

ABSTRACT Dimethylamine (DMA) ignition delay times and OH time histories during the oxidation process were investigated behind reflected shock waves. The ignition delay time measurements cover the temperature range of 1181–1498 K, with pressures near 0.9, 1.5, and 2.8 atm, and equivalence ...

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Oxidation of Alkylbenzenes with Cerium Complexes Containing a Tripodal Oxygen Ligand

12.11.2014 | Xiao‐Yi Yi, Guo‐Cang Wang, Ho‐Fai Ip, Wai‐Yeung Wong, Lizhuang Chen, Herman H. ‐Y. Sung, Ian D. Williams, Wa‐Hung Leung, European Journal of Inorganic Chemistry, 2014

Abstract The treatment of [Ce(LOEt)2(NO3)2] (LOEt– = [Co(η5‐C5H5){P(O)(OEt)2}3]–) with KMnO4 in water afforded a diamagnetic purple solid 1, which is tentatively formulated as a CeIV permanganate complex, “[Ce(LOEt)2(MnO4)2]”. The ZrIV analogue, [Zr(LOEt)2(MnO4)2] (2), has been prepared ...

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