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43.413 Aktuelle Fachpublikationen zum Thema temperature

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Achieving high-quality In0.3Ga0.7As films on GaAs substrates by low-temperature molecular beam epitaxy

28.10.2014 | Fangliang Gao; Lei Wen; Jingling Li; Yunfang Guan; Shuguang Zhang; Guoqiang Li, CrystEngComm, 2014

The effects of the thickness of the large-mismatched amorphous In0.6Ga0.4As buffer layer on In0.3Ga0.7As epi-films grown on a GaAs substrate have been systematically investigated. The In0.3Ga0.7As films with the In0.6Ga0.4As buffer layer of 0, 1, 2, and 4 nm thickness are grown by low-temperature ...

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An adaptable stage perfusion incubator for the controlled cultivation of C2C12 myoblast cells

28.10.2014 | Felix Kurth; Alfredo Franco-Obregon; Christoph A Bärtschi; Petra S Dittrich, Analyst, 2014

Here we present a stage perfusion incubation system that allows for the cultivation of mammalian cells within PDMS microfluidic devices for long-term microscopic examination and analysis. The custom-built stage perfusion incubator is adaptable to any x-y microscope stage and is enabled for ...

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Zinc Chloride Catalyzed Collective Synthesis of Arylmethylene Bis(3- hydroxy-2-cyclohexene-1-ones) and 1,8-Dioxo-octahydroxanthene/acridine Derivatives

28.10.2014 | Selva Ganesan, Subramaniapillai; Kothandapani, Jagatheeswaran; Ganesan, Asaithampi, Letters in Organic Chemistry, 2014

Abstract: Catalytic amount of ZnCl2 efficiently promoted rapid synthesis of arylmethylene bis(3-hydroxy-2-cyclohexene- 1-one) in water at room temperature in excellent yield. At elevated temperature, ZnCl2 also catalyzed one-pot synthesis of 1,8-dioxo-octahydroxanthene and ...

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Ultrasound-promoted One-pot Synthesis of 2-Thioxo-dihydropyrimidine Derivatives Bearing Piperidinylamide Moiety

28.10.2014 | Chen, Bao-Hua; Li, Ji-Tai; Lan, Rui-Jia; Chen, Guo-Feng, Letters in Organic Chemistry, 2014

Abstract: A convenient and efficient one-pot synthesis of 2-thioxo-dihydropyrimidine derivatives bearing piperidinylamide moiety is described. The reactions were carried out in 81-91% yields via the condensation of 1-(piperidin-1- yl)butane-1,3-dione with aromatic aldehyde and thiourea in ...

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Glycerol Mediated Strecker Reaction: Catalyst-free Protocol for the Synthesis of α-Amino Nitriles

28.10.2014 | S. Ghogare, Ramesh; Rajeshwari, K.; Venkat Narsaiah, A., Letters in Organic Chemistry, 2014

Abstract: Environmental friendly multicomponent protocol for the preparation of α-amino nitriles has been developed. In this methodology, glycerol was demonstrated as an efficient and alternative solvent for organic synthesis. After the reaction, glycerol was recovered and reused for ...

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Preparation of Pyrido[2,3-b]pyrazine Ring System via Regioselective Condensation Reaction

28.10.2014 | Kekesi, Laszlo; Dancso, Andras; Illyes, Eszter; Boros, Sandor; Pato, Janos; Greff, Zoltan; Nemeth, Gabor; Garamvolgy ..., Letters in Organic Chemistry, 2014

Abstract: The pyrido[2,3-b]pyrazine core structure can be found in several molecules that express biological activity. We have previously published a series of these compounds that showed erlotinib-resistant tumor inhibitor potential. The common way of their synthesis is the condensation of ...

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Dual ligand-based fluorescence and phosphorescence emission at room temperature from platinum thioxanthonyl complexes

28.10.2014 | Fabian Geist; Andrej Jackel; Rainer F. Winter, Dalton Transactions, 2014

New square-planar platinum(ii) complexes of the type trans-[Pt(PEt3)2(Tx)(X)] (X = Br, Cl, I or CN) bearing a σ-bonded thioxanthon-2-yl (Tx) ligand have been prepared and characterised by X-ray crystallography, cyclic voltammetry, and by NMR and electronic absorption and luminescence ...

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Nanocryatalline Pt-CeO2 as an efficient catalyst for room temperature selective reduction of nitroarenes

28.10.2014 | Rajaram Bal; Astha Shukla; Rajib K Singha; Takehiko Sasaki, Green Chemistry, 2014

We have developed a new synthesis strategy to prepare Pt nanoparticles with size between 2-5 nm supported on CeO2 nanoparticle with size between 30-60 nm by hydrothermal method in presence of surfactant cetyltrimethyl ammonium bromide( CTAB) and polymer (PVP). It was found that the catalyst is ...

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Non-aqueous microgel particles: synthesis, properties and applications

28.10.2014 | J. A. Bonham; M. A. Faers; J. S. van Duijneveldt, Soft Matter, 2014

Microgels are cross-linked polymer latex particles that can form stable colloidal dispersions. Their typical sizes range from 10 to 1000 nm and they can swell in response to their external environment (pH, temperature and solvency). This swelling behaviour is central to many potential ...

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DIRECT IONIC LIQUID EXTRACTANT INJECTION FOR VOLATILE CHEMICAL ANALYSIS – A GAS CHROMATOGRAPHY SAMPLING TECHNIQUE

28.10.2014 | SITI UMAIRAH MOKHTAR; Sung Chin; Doug MacFarlane; Vijayaraghavan Ranganathan; Olaf H. Drummer; Philip John Marriott, Green Chemistry, 2014

A green sampling approach by direct injection of ionic liquid (IL) solvent containing a variety of analytes using programmable temperature vaporisation (PTV) injection with gas chromatography (GC) is presented. The method was developed using test mixtures of n-alkanes, n-alcohols and polyaromatic ...

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