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4.002 Aktuelle Fachpublikationen zum Thema temperature

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A pulsed uniform Laval expansion coupled with single photon ionization and mass spectrometric detection for the study of large molecular aggregates

26.03.2015 | Bernhard Schläppi; Jessica H. Litman; Jorge J. Ferreiro; David Stapfer; Ruth Signorell, Physical Chemistry Chemical Physics, 2015

We report on a new instrument that allows for the investigation of weakly-bound molecular aggregates under equilibrium conditions (constant temperature and pressure). The aggregates are formed in a Laval nozzle and probed with time-of-flight mass spectrometry in the uniform postnozzle flow; i.e. ...

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Speed of Sound Measurements in Ethanol and Benzene over the Temperature Range from (253.2 to 353.2) K at Pressures up to 30 MPa

19.03.2015 | Robin Wegge; Markus Richter; Roland Span, Journal of Chemical & Engineering Data, 2015

The speed of sound in ethanol and benzene was measured over the temperature range of (253.2 to 353.2) K with pressures up to 30MPa utilizing the double-path length pulse-echo technique. The speed of sound system was calibrated with pure water at temperatures between T = (274.15 and 353.15) K and ...

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Materials, Vol. 8, Pages 1249-1263: Gas-Phase Deposition of Ultrathin Aluminium Oxide Films on Nanoparticles at Ambient Conditions

19.03.2015 | Valdesueiro, David ; Meesters, Gabrie M. H.; Kreutzer, Michiel T.; van Ommen, J. Ruud, Materials, 2015

We have deposited aluminium oxide films by atomic layer deposition on titanium oxide nanoparticles in a fluidized bed reactor at 27 ± 3 °C and atmospheric pressure. Working at room temperature allows coating heat-sensitive materials, while working at atmospheric pressure would simplify the ...

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Intermetallic germanides with non-centrosymmetric structures derived from the Yb3Rh4Sn13 type

18.03.2015 | R. Gumeniuk; M. Schöneich; K. O. Kvashnina; L. Akselrud; A. A. Tsirlin; M. Nicklas; W. Schnelle; O. Janson; Q. Zheng ..., Dalton Transactions, 2015

New germanides with composition RE3Pt4Ge13 (RE = Y, Pr, Sm, Gd, Tb, Tm) have been prepared by high-pressure, high-temperature synthesis. Their crystal structures have been refined, and the relationship of this new rhombohedral and monoclinic structure types with the primitive cubic Yb3Rh4Sn13 ...

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Melting of Highly Oriented Fiber DNA Subjected to Osmotic Pressure

18.03.2015 | Andrew Wildes; Liya Khadeeva; William Trewby; Jessica Valle-Orero; Andrew Studer; Jean-Luc Garden; Michel Peyrard, Journal of Physical Chemistry B, 2015

A pilot study of the possibility to investigate temperature-dependent neutron scattering from fiber-DNA in solution is presented. The study aims to establish the feasibility of experiments to probe the influence of spatial confinement on the structural correlation and the formation of denatured ...

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Tandem differential mobility spectrometry with ion dissociation in air at ambient pressure and temperature

16.03.2015 | Marlen Menlyadiev; Alexander tarassov; Gary A Eiceman; Alexander Kielnecker, Analyst, 2015

Proton bound dimers were dissociated to protonated monomers in air at ambient pressure and temperature using electric fields of an ultrahigh Field Asymmetric Ion Mobility Spectrometry (ultraFAIMS) with the onset of dissociation for ethyl acetate as 96 Td and for dimethyl methyl phosphonate as 170 ...

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Detection of decomposition for high pressure ethylene/vinyl acetate copolymerization in autoclave reactor using principal component analysis on heat balance model

16.03.2015 | G Sivalingam, Nipun J. Soni, Suketu M. Vakil, The Canadian Journal of Chemical Engineering, 2015

Abstract The autoclave reactor offers flexibility in producing specialty grades of ethylene/vinyl acetate copolymer at temperature range of 150‐230 °C and pressure range of 1400‐2000 kg/cm2. At such conditions, copolymerization is accompanied by decomposition of reactants which increases the ...

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Effects of Temperature and Strain Rate on the Dynamic Fracture Properties of HTPB Propellant

13.03.2015 | Bing Long, Xinlong Chang, Kuan Hu, Youhong Zhang, Propellants, Explosives, Pyrotechnics, 2015

Abstract In order to study the influence of temperature and strain‐rate on HTPB propellant fracture capability under impact loading conditions, a dynamic fracture experiment at different temperatures was carried out by using the cracked straight‐through Brazilian disc (CSTBD) specimen on the ...

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The Development of a Confined Impact Test for Evaluating the Safety of Polymer‐Bonded Explosives During Warhead Penetration

13.03.2015 | Xiaogan Dai, Qian Huang, Fenglei Huang, Ming Li, Yushi Wen, Xuwang Liu, Propellants, Explosives, Pyrotechnics, 2015

Abstract During warhead penetration, which lasts several milliseconds, warheads undertake moderate pressures reaching hundreds of MPa. Previous methods have been unable to mimic such stimuli to evaluate the safety of ammunitions. Hence, new safety evaluation methods with moderate pressures and ...

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Effects of thermal radiation and chemical reactions on peristaltic flow of a Newtonian nanofluid under inclined magnetic field in a generalized vertical channel using homotopy perturbation method

13.03.2015 | M. Kothandapani, J. Prakash, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract In this paper, we study the influences of inclined magnetic field, heat source, thermal radiation, and chemical reactions on peristaltic flow of a Newtonian nanofluid in a vertical generalized (tapered asymmetric) channel. The flow is engendered because of an asymmetric sinusoidal ...

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