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1.761 Aktuelle Fachpublikationen zum Thema temperature

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Novel heterocyclic poly(pyridine‐imide)s with unsymmetric carbazole substituent and noncoplanar structure: High thermal, mechanical and optical transparency, electrochemical, and electrochromic properties

21.11.2014 | Ying‐Chi Huang, Kun‐Li Wang, Wei‐Yi Lee, Yi‐An Liao, Der‐Jang Liaw, Kueir‐Rarn Lee, Juin‐Yih Lai, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT A diamine containing heterocyclic pyridine and unsymmetrical carbazole substituents, 4‐(9‐ethyl‐3‐carbazole)‐2,6‐bis(4‐aminophenyl)pyridine (CBAPP), was prepared for use in the synthesis of poly(pyridine‐imide)s PI‐1–8 by direct polycondensation with dianhydrides in ...

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Physicochemical and textural properties of tartary buckwheat starch after heat‐moisture treatment at different moisture levels

20.11.2014 | Hang Liu, Manman Lv, Qiang Peng, Fang Shan, Min Wang, Starch - Stärke, 2014

Tartary buckwheat, which has nutritional and health benefits, has been consumed in China for so many years. However, its predominant component, starch, limits the application range of tartary buckwheat in the food industry. In this study, tartary buckwheat starch (TBS) was extracted and ...

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Dual Emission and Excited-State Mixed-Valence in a Quasi-Symmetric Dinuclear Ru–Ru Complex

20.11.2014 | Christoph Kreitner; Markus Grabolle; Ute Resch-Genger; Katja Heinze, Inorganic Chemistry, 2014

The synthesis and characterization of the new dinuclear dipeptide [(EtOOC-tpy)Ru(tpy-NHCO-tpy)Ru(tpy-NHCOCH3)]4+ 34+ of the bis(terpyridine)ruthenium amino acid [(HOOC-tpy)Ru(tpy-NH2)]2+ 12+ are described, and the properties of the dipeptide are compared to those of the mononuclear complex ...

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Alginate/PVA Beads for Levan Production by Zymomonas mobilis

18.11.2014 | Marina F. S. Lorenzetti, Marina R. Moro, Crispin H. García‐Cruz, Journal of Food Process Engineering, 2014

Abstract The levan is a biopolymer of great importance to the food industry since it is capable of defining and modifying the structure of one food, acting as stabilizer, thickener, gelling agent and being largely responsible for the texture of processed foods. The levan production by ...

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TiO2–SiO2-Composite-Supported Catalysts for Residue Fluid Catalytic Cracking Diesel Hydrotreating

17.11.2014 | Qiang Wei; Ying Li; Tao Zhang; Xiujuan Tao; Yasong Zhou; Keng Chung; Chunming Xu, Energy & Fuels, 2014

Composites of TiO2–SiO2 oxides (CTS) with various Ti/Si atomic ratios were prepared by the sol–gel method, and the CO2 supercritical fluid extraction method was used to remove solvent in the gel. The effects of the Ti/Si atomic ratio and calcination temperature on the specific surface area, pore ...

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Local measurement of mass transfer in a reactive spray for CO2 capture

13.11.2014 | Maria Ouboukhlik, Sawitree Saengkaew, Marie‐Christine Fournier‐Salaün, Lionel Estel, Gérard Grehan, The Canadian Journal of Chemical Engineering, 2014

Abstract CO2 capture is still a major challenge for the environment and decarbonisation of gas streams. It has been industrially feasible for several decades using chemical absorption by alkanolamine solvents. The purpose of this work is to characterize the mass transfer in a spray contactor ...

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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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A new approach to determination of hydration equilibria constants for the case of [Er(EDTA)(H2O)n]− complexes

12.11.2014 | Rafał Janicki; Anna Mondry, Physical Chemistry Chemical Physics, 2014

Two anionic complexes [Er(EDTA)(H2O)2]− and [Er(EDTA)(H2O)3]− were obtained in the form of the following compounds: [C(NH2)3]2[Er(EDTA)(H2O)2]ClO4·6H2O (I) and Na[Er(EDTA)(H2O)3]·5H2O (II), respectively. The UV-vis-NIR absorption spectra of both monocrystals were measured at room temperature and ...

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Studying the effects of Zr-doping in (Bi0.5Na0.5)TiO3via diffraction and spectroscopy

11.11.2014 | Peter E. R. Blanchard; Samuel Liu; Brendan J. Kennedy; Chris D. Ling; Zhaoming Zhang; Maxim Avdeev; Ling-Yun Jang; J ..., Dalton Transactions, 2014

The structural properties of (Bi0.5Na0.5)Ti1−xZrxO3 (where 0 ≤ x ≤ 0.7) have been investigated using powder diffraction and X-ray absorption spectroscopy. Diffraction measurements on (Bi0.5Na0.5)TiO3 confirm that both monoclinic Cc and rhombohedral R3c phases are present at room temperature. ...

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Distinguishing co‐existing unimolecular and bimolecular structural forms using joint analysis of Raman and UV absorption data

11.11.2014 | Pavla Pečínková, Jiří Bok, Kateřina Hofbauerová, Josef Štěpánek, Journal of Raman Spectroscopy, 2014

Standard Raman measurements of solutions require relatively high concentration of dissolved species, which supports formation of intermolecular complexes. In case of simultaneous presence of unimolecular and bimolecular structural forms, it is often difficult or even impossible to discriminate ...

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