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2.055 Aktuelle Fachpublikationen zum Thema temperature

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Suppression of the Leidenfrost effect via low frequency vibrations

16.12.2014 | Boon T. Ng; Yew M. Hung; Ming K. Tan, Soft Matter, 2014

The ability to suppress the Leidenfrost effect is of significant importance in applications that require rapid and efficient cooling of surfaces with temperature higher than the Leidenfrost point TSL. The Leidenfrost effect will result in substantial reduction in cooling efficiency and hence ...

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Rhodium Nanoflowers Stabilized by a Nitrogen‐Rich PEG‐Tagged Substrate as Recyclable Catalyst for the Stereoselective Hydrosilylation of Internal Alkynes

11.12.2014 | Wusheng Guo, Roser Pleixats, Alexandr Shafir, Teodor Parella, Advanced Synthesis & Catalysis, 2014

Abstract Morphology and size controllable rhodium nanoparticles stabilized by a nitrogen‐rich polyoxyethylenated derivative have been prepared by reduction of RhCl3 with NaBH4 in water at room temperature and fully characterized. The flower‐like Rh NPs are effective and recyclable catalysts ...

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Chimeric Behavior of Excited Thioxanthone in Protic Solvents: I. Experiments

10.12.2014 | T. Villnow; G. Ryseck; V. Rai-Constapel; C. M. Marian; P. Gilch, Journal of Physical Chemistry A, 2014

The photophysics of thioxanthone (TX) dissolved in methanol (MeOH) and 2,2,2,-trifluoroethanol (TFE) was studied by time-resolved fluorescence and absorption spectroscopy. The spectrally integrated stimulated emission is seen to lose amplitude within ∼5–10 ps. This is much shorter than the ...

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Field‐grown Cotton Exhibits Seasonal Variation in Photosynthetic Heat Tolerance without Exposure to Heat‐stress or Water‐deficit Conditions

09.12.2014 | J. L. Snider, D. R. Chastain, G. D. Collins, Journal of Agronomy and Crop Science, 2014

Abstract Thermotolerance acclimation of photosystem II to heat and drought is well documented, but studies demonstrating developmental impacts on heat tolerance in field‐grown plants are limited. Consequently, climatic variables, estimated canopy temperature, predawn leaf water potential ...

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Iron Oxalate Capped Iron-copper Nano for oxidative transformation of aldehydes

09.12.2014 | Rajasri kashyap; Dhruba Joyti Talukdar; Sanjay Pratihar, New Journal of Chemistry, 2014

An efficient, sustainable and green procedure for the synthesis of selective orthorhombic iron(oxalate) capped Fe-Cu bimetallic oxide nanomaterial [Fe(ox)Fe-CuOx] is developed using sodium borohydride (NaBH4) reduction of iron(II) salt in presence of oxalic acid at room temperature followed by ...

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Catalytic hydrogen production from paraformaldehyde and water with an organoiridium complex

09.12.2014 | Tomoyoshi Suenobu; Yusuke Isaka; Satoshi Shibata; Shunichi Fukuzumi, Chemical Communication, 2014

Paraformaldehyde decomposed using an organoiridium complex (1, [IrIII(Cp*)(4-(1H-pyrazol-1-yl-κN2)benzoic acid-κC3)(H2O)]2SO4) as a catalyst in water to produce H2 and CO2 in a 2:1 mol ratio at room temperature. The catalytic cycle is composed of the reduction of 1 by paraformaldehyde under basic ...

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Suppression of Leidenfrost effect via low frequency vibrations

09.12.2014 | Boon Thiam Ng; Yew Mun Hung; Ming Kwang Tan, Soft Matter, 2014

The ability to suppress Leidenfrost effect is of significant importance in applications that require rapid and efficient cooling of surfaces with temperature higher than Leidenfrost point TSL. Leidenfrost effect will result in substantial reduction in cooling efficiency and hence there have been ...

mehr

Methionine Ligand Lability of Homologous Monoheme Cytochromes c

09.12.2014 | Benjamin D. Levin; Kelly A. Walsh; Kristal K. Sullivan; Kara L. Bren; Sean J. Elliott, Inorganic Chemistry, 2014

Direct electrochemical analysis of adsorbed bacterial monoheme cytochromes c has revealed a phenomenological loss of the axial methionine when examined using pyrolytic “edge-plane” graphite (EPG) electrodes. While prior findings have reported that the Met-loss state may be quantitatively ...

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Continuous Dehydrogenation of n‐Pentanol over a Cr Modified Cu/γ‐Al2O3‐La2O3 Catalyst

05.12.2014 | Chen Liu, Yalong Wang, Hailong Chu, Mande Qiu, Libo Niu, Guoyi Bai, Chinese Journal of Chemistry, 2014

Abstract The oxidant‐free dehydrogenation of n‐pentanol over copper based catalysts was investigated in this paper. The effect of metal modification on the activity and stability of the copper catalyst supported on γ‐Al2O3 and La2O3 (Cu/γ‐Al2O3‐La2O3) was clarified and a Cr modified ...

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Thermodynamic Properties of CO2 Conversion by Sodium Borohydride

03.12.2014 | Yi Zhao, Zili Zhang, Chemical Engineering & Technology, 2014

Abstract In order to verify the resource utilization of CO2 from coal‐fired flue gas, the conversion of CO2 by sodium borohydride was investigated under atmospheric pressure and moderate temperature. According to the product analysis results of mass spectrometry and ion chromatography, ...

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