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5.835 Aktuelle Fachpublikationen zum Thema temperature

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A Mild Hydration of Nitriles Catalysed by Copper(II) Acetate

25.11.2015 | Patricia Marce; James Lynch; John Blacker; J M J Williams, Chemical Communication, 2015

A simple, mild and general procedure for the hydration of nitriles to amides using copper as catalyst and promoted by N,N-diethylhydroxylamine is described. The reaction can be conducted in water at low temperature in short reaction times. This new procedure allows amides to be obtained from a ...


Production of a Meat Seasoning Powder Enriched with γ‐Aminobutyric Acid (GABA) from Mature Coconut Water Using Pediococcus Pentosaceus HN8

20.11.2015 | Duangporn Kantachote, Tomorn Nunkaew, Anussara Ratanaburee, Nikkajit Klongdee, Journal of Food Processing and Preservation, 2015

Abstract The optimal conditions for producing 9.96 g/L GABA (γ‐aminobutyric acid) in mature coconut water by Pediococcus pentosaceus HN8 were 10% monosodium glutamate as an additive, an initial pH of 5.92 and 33C under static condition for 24 h. A seasoning meat (112 g/L culture broth), spicy ...


A complete TSDC description of molecular mobilities in polylactide/starch blends from local to normal modes: Effect of composition, moisture, and crystallinity

20.11.2015 | Estrella Laredo, Dinorah Newman, Romina Pezzoli, Alejandro J. Müller, Alfredo Bello, Journal of Polymer Science Part B: Polymer Physics, 2015

ABSTRACT Thermally stimulated depolarization current is applied to study the dielectric relaxations coexisting from 80 to 380 K in the PLLA/starch, immiscible biodegradable blend system. The relaxation parameters are determined for chain mobilities at different ranges, whether in the amorphous ...


Permeability of Rubbery and Glassy Membranes of Ionic Liquid Filled Polymersome Nanoreactors in Water

20.11.2015 | Soonyong So; Letitia J. Yao; Timothy P. Lodge, Journal of Physical Chemistry B, 2015

Nanoemulsion-like polymer vesicles (polymersomes) having ionic liquid interiors dispersed in water are attractive for nanoreactor applications. In a previous study, we demonstrated that small molecules could pass through rubbery polybutadiene membranes on a time scale of seconds, which is ...


Competing insertion and external binding motifs in hydrated neurotransmitters: IR spectra of protonated phenylethylamine monohydrate

19.11.2015 | Aude Bouchet, Markus Schütz, Otto Dopfer, ChemPhysChem, 2015

Hydration has a drastic impact on the structure and function of flexible biomolecules such as aromatic ethylamino neurotransmitters. The structure of monohydrated protonated phenylethylamine (H+PEA‐H2O) is investigated by infrared photodissociation (IRPD) spectroscopy of cold cluster ions using ...


Development of a Smart, Anti‐Water Polyurethane Polymer Hair Coating for Style Setting

19.11.2015 | Liu Yan, Liu Yijun, Jinlian Hu, Ji FengLong, Lv Jing, Chen Shao Jun, Zhu Yong, International Journal of Cosmetic Science, 2015

Abstract Objective The goal of this work was to develop a novel polyurethane polymer coating for the surface of the hair that could be used for style setting via the shape memory effect. The features of the films are in accordance with conventional hair styling methods used in the ...


Hydrogen Solubility in Hydrocarbon and Oxygenated Organic Compounds

19.11.2015 | Thi-Kim-Hoang Trinh; Jean-Charles de Hemptinne; Rafael Lugo; Nicolas Ferrando; Jean-Philippe Passarello, Journal of Chemical & Engineering Data, 2015

The hydrogen solubility in 42 organic compounds including alcohols, aldehydes, carboxylic acid, esters and ethers, glycols, n-alkanes, and water is investigated. For this purpose, the Henry's constant is collected or computed from different sources. After removing incoherent data, two temperature ...


Electronically Stabilized Nonplanar Phenalenyl Radical and Its Planar Isomer

19.11.2015 | Ommid Anamimoghadam; Mark D. Symes; De-Liang Long; Stephen Sproules; Leroy Cronin; Götz Bucher, Journal of the American Chemical Society, 2015

Stable phenalenyl radicals have great potential as the basis for new materials for applications in the field of molecular electronics. In particular, electronically stabilized phenalenyl species that do not require steric shielding are molecules of fundamental interest, but are notoriously ...


Activation Thermodynamics and Concentration Scaling of the Viscosity of Unimeric and Aggregated Poloxamer EO93PO54EO93 in Water

19.11.2015 | François Quirion, Macromolecules, 2015

The viscosity of the aqueous solutions of Poloxamer EO93PO54EO93 (a triblock copolymer of ethylene oxide, EO, and propylene oxide, PO) was determined at concentrations ranging from 0.002 to 0.12 g·mL–1 at 0.9, 8.9, and 20.0 °C where only unimers are present, at 24.9 and 30.3 °C where the unimers ...


Energetics and Mechanism of Conformational Transitions of Protein‐Like NIPAM‐Sodium Styrene Sulfonate Copolymers in Aqueous Solutions

18.11.2015 | Valerij Y. Grinberg, Tatiana V. Burova, Natalia V. Grinberg, Alexander S. Dubovik, Irina G. Plaschina, Tatiana V. La ..., Macromolecular Chemistry and Physics, 2015

Protein‐like and random NIPAM‐sodium styrene sulfonate copolymers of similar composition have been prepared by radical polymerization in water at temperatures above and below the LCST of PNIPAM, respectively. Thermal transitions of the copolymers in aqueous solutions have been studied by means ...


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