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6.297 Aktuelle Fachpublikationen zum Thema temperature

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Catalyst-Free Aldol Reaction in a Water Medium

04.05.2016 | Yao, Weirong; Cui, Yanli; Wang, Peipei; Mao, Yangyi, Letters in Organic Chemistry, 2016

Abstract: Background: With growing interest in developing environmentally friendly reactions and atom-economic processes in recent years, the utilization of water as a solvent has attracted a great deal of attention. This is not only for its low-cost, safe and environmentally benign nature, ...

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Replacement of Peanut by Residue from the Cashew Nut Kernel Oil Extraction to Produce a Type Paçoca Candy

30.04.2016 | Janice Ribeiro Lima, Deborah Dos Santos Garruti, Laura Maria Bruno, Ídila Maria da Silva Araújo, Ana Carolina Olivei ..., Journal of Food Processing and Preservation, 2016

Absctract A candy product was obtained using cashew nut kernel cake and its composition and stability were evaluated during storage at room temperature (28C) for 189 days. Sensory tests were performed to define the formulation, testing different cake contents (50.0, 59.5, and 69.5%), roasting ...

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Iron oxide nanotube film formed on carbon steel for photoelectrochemical water splitting: effect of annealing temperature

29.04.2016 | Hongda Deng, Mao‐Chia Huang, Wei‐Heng Weng, Jing‐Chie Lin, Surface and Interface Analysis, 2016

Carbon steels (CSs) were anodized in an ethylene glycol solution containing 3 vol.% H2O and 0.1 m NH4F to coat with nanotube arrays film. The as anodized nanotube arrays film were annealed in argon atmosphere at various temperatures ranging from 250 to 550 °C for 4 h. The morphology and crystal ...

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Advanced CFD Analysis of an Air‐cooled PEM Fuel Cell Stack Predicting the Loss of Performance with Time

29.04.2016 | C. Fink, L. Karpenko‐Jereb, S. Ashton, Fuel Cells, 2016

Abstract The PEM fuel cell simulation package developed by AVL List GmbH is coupled with a semi‐empirical degradation model describing the dependency of material parameters on operating conditions. The CFD model calculates the 3D distributions of electronic/ionic potentials, velocity, ...

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Evidence of Polaron Excitations in Low Temperature Raman Spectra of Oxalic Acid Dihydrate

29.04.2016 | Vlasta Mohaček-Grošev; Jože Grdadolnik; Dušan Hadži, Journal of Physical Chemistry A, 2016

Low temperature Raman spectra of oxalic acid dihydrate (8–300 K) for both the polycrystalline and single crystal phase show strong variation with temperature in the interval from 1200 to 2000 cm–1. Previous low temperature diffraction studies all confirmed the stability of the crystal P21/n phase ...

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Oligomer production through glycolysis of poly(ethylene terephthalate): effects of temperature and water content on reaction extent

28.04.2016 | Adriana Stoski, Matheus Felipe Viante, Cátia Santos Nunes, Edvani Curti Muniz, Maria Lurdes Felsner, Carlos Alberto ..., Polymer International, 2016

Abstract Using ethylene glycol (EG) and post‐consumer poly(ethylene terephthalate) (PET) bottles, monomers and oligomers were obtained through glycolysis catalyzed by zinc acetate. Three reaction temperatures (150, 160 and 170 °C) and different water contents (0 %, 1.0 % and 2.0 % with respect ...

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Molecules, Vol. 21, Pages 565: Ultrasound-Assisted Enantioselective Esterification of Ibuprofen Catalyzed by a Flower-Like Nanobioreactor

28.04.2016 | An, Baiyi ; Fan, Hailin ; Wu, Zhuofu ; Zheng, Lu ; Wang, Lei ; Wang, Zhi ; Chen, Guang, Molecules, 2016

A flower-like nanobioreactor was prepared for resolution of ibuprofen in organic solvents. Ultrasound irradiation has been used to improve the enzyme performance of APE1547 (a thermophilic esterase from the archaeon Aeropyrum pernix K1) in the enantioselective esterification. Under optimum ...

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Conversion of Xylose to Furfuryl Alcohol and 2‐Methylfuran in a Continuous Fixed‐Bed Reactor

27.04.2016 | Jinglei Cui, Jingjing Tan, Xiaojing Cui, Yulei Zhu, Tiansheng Deng, Guoqiang Ding, Yongwang Li, ChemSusChem, 2016

Abstract An efficient process was designed for the synthesis of furfuryl alcohol and 2‐methylfuran from xylose using a continuous fixed‐bed reactor over a catalyst combining Hβ zeolite and Cu/ZnO/Al2O3 in γ‐butyrolactone (GBL)/water as solvent. The cooperative effect of Hβ zeolite and GBL ...

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Passivation effect of water vapour on thin film polycrystalline Si solar cells

27.04.2016 | Peter Pikna, Martin Müller, Christiane Becker, Antonín Fejfar, physica status solidi (a), 2016

In this work, we investigated a passivation of both surface and bulk of polycrystalline silicon films by water vapour. To assess the passivation effect we used Suns‐VOC method to measure the open‐circuit voltage VOC of polycrystalline silicon thin film solar cells. The treatment conditions, ...

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Synergetic mechanism and enantioseparation of aromatic β‐amino acids by biphasic chiral high‐speed counter‐current chromatography

27.04.2016 | Chao Han, Jianguang Luo, Zhongrui Li, Yingqi Zhang, Huijun Zhao, Lingyi Kong, Journal of Separation Science, 2016

A biphasic chiral recognition system based on chiral ligand exchange with Cu(II)‐N‐n‐dodecyl‐L‐proline and hydroxypropyl‐β‐cyclodextrin as an additive was developed to enantioseparate aromatic β‐amino acids by high‐speed counter‐current chromatography. The biphasic chiral recognition system was ...

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