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4.368 Aktuelle Fachpublikationen zum Thema temperature

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New application of NV centers in CVD diamonds as a fluorescent nuclear track detector

28.08.2015 | Shinobu Onoda, Moriyoshi Haruyama, Tokuyuki Teraji, Junichi Isoya, Wataru Kada, Osamu Hanaizumi, Takeshi Ohshima, physica status solidi (a), 2015

NV (nitrogen vacancy) center in a diamond is utilized for FNTD (fluorescent nuclear track detector) for the first time. We performed high energy heavy ion irradiation to single crystal type‐IIa diamonds with various nitrogen concentrations. After high temperature annealing, the nitrogen ...

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Absorption Performance and Mechanism of CO2 in Aqueous Solutions of Amine-Based Ionic Liquids

28.08.2015 | Pengcheng Hu; Rui Zhang; Zhichang Liu; Haiyan Liu; Chunming Xu; Xianghai Meng; Meng Liang; Shuangshuang Liang, Energy & Fuels, 2015

Several amine-based ionic liquids (ILs) were synthesized via a one-step method using low-priced organic amines and inorganic acids, and they were mixed with water to form new CO2 absorbents. The effects of the ionic structure, IL concentration, temperature, and pressure on the CO2 absorption ...

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Micellar electrokinetic chromatography with short‐end injection for rapid separation and simultaneous determination of aesculin, aesculetin and phenylephrine in pharmaceutical preparations

27.08.2015 | Lucie Pincová, Klára Petrů, Marie Pospíšilová, Miroslav Polášek, ELECTROPHORESIS, 2015

A fast micellar electrokinetic chromatography (MEKC) method for simultaneous assay of aesculin, aesculetin and phenylephrine was developed and validated. The separation was carried out in a fused‐silica capillary (id 50μm, total length 64.5 cm, effective length 8.5 cm) with UV detection at 210 ...

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Large Magnetization and Frustration Switching of Magnetoresistance in the Double‐Perovskite Ferrimagnet Mn2FeReO6

26.08.2015 | Angel M. Arévalo‐López, Graham M. McNally, J. Paul Attfield, Angewandte Chemie International Edition, 2015

Abstract Ferrimagnetic A2BB′O6 double perovskites, such as Sr2FeMoO6, are important spin‐polarized conductors. Introducing transition metals at the A‐sites offers new possibilities to increase magnetization and tune magnetoresistance. Herein we report a ferrimagnetic double perovskite, ...

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Rapid Grain Growth in 3Y‐TZP Nanoceramics by Pressure‐Assisted and Pressure‐Less SPS

26.08.2015 | David Salamon, Radek Kalousek, Karel Maca, Zhijian Shen, Journal of the American Ceramic Society, 2015

Pressure‐less spark plasma sintering (SPS) is a new approach during which rapid densification of ceramic nanopowder green bodies is accompanied by rapid grain growth. Although the origin of this phenomenon has not yet been fully understood significant, difference in grain growth between ...

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Fabrication and Characterization of Transparent (Y0.98−xTb0.02Eux)2O3 Ceramics with Color‐Tailorable Emission

26.08.2015 | Bin Lu, Ji‐Guang Li, Xudong Sun, Yoshio Sakka, Journal of the American Ceramic Society, 2015

Transparent (Y0.98−xTb0.02Eux)2O3 (x=0–0.04) ceramics with color‐tailorable emission have been successfully fabricated by vacuum sintering at the relatively low temperature of 1700°C for 4h. These ceramics have the in‐line transmittances of ~73%–76% at 613nm, the wavelength of Eu3+ emission ...

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Effects of Free‐Air Carbon Dioxide Enrichment on Sap Flow and Canopy Microclimate of Maize Grown under Different Water Supply

26.08.2015 | R. Manderscheid, M. Erbs, S. Burkart, K.‐P. Wittich, F.‐J. Löpmeier, H.‐J. Weigel, Journal of Agronomy and Crop Science, 2015

Abstract The rise of atmospheric CO2 concentration ([CO2]) affects stomatal conductance and thus transpiration and leaf temperature. We evaluated the effect of elevated [CO2] levels under different water supply on daily sap flow and canopy microclimate (air temperature (Tc) and vapour pressure ...

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Selective hydrogenolysis of glycerol to 1,2‐propanediol over highly active copper‐magnesia catalysts: Reaction parameter, catalyst stability and mechanism study

25.08.2015 | Satyanarayana Murty Pudi, Prakash Biswas, Shashi Kumar, Journal of Chemical Technology & Biotechnology, 2015

Abstract Background The surplus amount of glycerol (>1 million tons per year) from the biodiesel industry has received much attention in recent for production of alternate chemicals. The performance of x%Cu/MgO (x = 5‐50%) catalysts were investigated for selective hydrogenolysis of glycerol ...

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A Comparison of Results by Correlation Gas Chromatography with Another Gas Chromatographic Retention Time Technique. The Effects of Retention Time Coincidence on Vaporization Enthalpy and Vapor Pressure

25.08.2015 | Chase Gobble; James S. Chickos, Journal of Chemical & Engineering Data, 2015

The vaporization enthalpies of a mixture of n-alkanes, aliphatic esters, and dialkyl phthalates are examined both by correlation gas chromatography and another commonly used gas chromatographic retention time technique according to the protocol described by Hamilton. The resulting vaporization ...

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Flow Pattern Effects on the Oxidation Deposition Rate of Aviation Kerosene

25.08.2015 | Xinyan Pei; Lingyun Hou; Zhuyin Ren, Energy & Fuels, 2015

The thermal stability characteristics of aviation kerosene were investigated using a heated tube at a constant heat power of 1087 W, mass flow rate of 1 g/s, and supercritical pressure of 3 MPa. Deposition rates on the tube walls were measured by weight. Each test lasts for 105 min. The inner ...

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