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46.669 Aktuelle Fachpublikationen zum Thema temperature


Tribenzodecacyclene and Hexabenzodecacyclene

17.04.2015 | Xin Geng; Joel T. Mague; Robert A. Pascal, Jr., The Journal of Organic Chemistry, 2015

High-temperature, TiCl4-catalyzed, triple aldol condensations of aceanthrenone 5 and acenaphthacenone 6 gave tribenzodecacyclene 3 and hexabenzodecacyclene 4, respectively, in yields of 16 and 0.8%, respectively. Compound 3 is a red, crystalline solid that is stable under ordinary conditions; its ...


Experimental and Chemical Kinetics Study of the Effects of Halon 1211 (CF2BrCl) on the Laminar Flame Speed and Ignition of Light Hydrocarbons

17.04.2015 | Olivier Mathieu; Charles Keesee; Claire Gregoire; Eric L. Petersen, Journal of Physical Chemistry A, 2015

In this study, the effect of Halon 1211 (CF2BrCl) on the ignition delay time and laminar flame speed of CH4, C2H4, and C3H8 were investigated experimentally for the first time. The results showed that the effects of Halon 1211 on the ignition delay time are strongly dependent on the hydrocarbon: ...


Binary Liquid–Liquid Equilibria of γ-Valerolactone with Some Hydrocarbons

17.04.2015 | Martin Klajmon; Karel Řehák; Pavel Morávek; Maja Matoušová, Journal of Chemical & Engineering Data, 2015

Liquid–liquid equilibrium data in binary systems γ-valerolactone + hydrocarbon (n-heptane, n-decane, n-dodecane, cyclohexane, and 2,4,4-trimethyl-1-penetene) were determined by direct analytical and cloud-point methods. The experimental data were smoothed by the extended scaling law equation ...


Sensors, Vol. 15, Pages 9136-9155: Genetic Algorithm (GA)-Based Inclinometer Layout Optimization

17.04.2015 | Liang, Weijie ; Zhang, Ping ; Chen, Xianping ; Cai, Miao ; Yang, Daoguo, Sensors, 2015

This paper presents numerical simulation results of an airflow inclinometer with sensitivity studies and thermal optimization of the printed circuit board (PCB) layout for an airflow inclinometer based on a genetic algorithm (GA). Due to the working principle of the gas sensor, the changes of the ...


[Report] The weakening summer circulation in the Northern Hemisphere mid-latitudes

17.04.2015 | Dim Coumou; Jascha Lehmann; Johanna Beckmann, Science , 2015

Rapid warming in the Arctic could influence mid-latitude circulation by reducing the poleward temperature gradient. The largest changes are generally expected in autumn or winter, but whether significant changes have occurred is debated. Here we report significant weakening of summer circulation ...


Linkage Isomerization via Geminate Cage or Bimolecular Mechanisms: Time-Resolved Investigations of an Organometallic Photochrome

17.04.2015 | Kristy M. DeWitt; Tung T. To; Edwin J. Heilweil; Theodore J. Burkey, Journal of Physical Chemistry B, 2015

The extent of the photoinitiated linkage isomerization of dicarbonyl(3-cyanomethylpyridine-κN)(η5-methylcyclopentadienyl)manganese (4) to dicarbonyl(3-cyano-κN-methylpyridine)(η5-methylcyclopentadienyl)manganese (5) was examined by time-resolved infrared spectroscopy on picosecond to microsecond ...


Vapor–Liquid Equilibrium of Three Hydrofluorocarbons with [HMIM][Tf2N]

17.04.2015 | Xiangyang Liu; Maogang He; Nan Lv; Xuetao Qi; Chao Su, Journal of Chemical & Engineering Data, 2015

New experimental data for the vapor–liquid equilibrium of 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([HMIM][Tf2N]) with difluoromethane (R-32), 1,1-difluoroethane (R-152a), and pentafluoroethane (R-125) were presented. Measurements were performed using an isochoric saturation ...


Polyurethane-Grafted Chitosan as New Biomaterials for Controlled Drug Delivery

17.04.2015 | Arun Kumar Mahanta; Vikas Mittal; Nitesh Singh; Debabrata Dash; Sudip Malik; Mohan Kumar; Pralay Maiti, Macromolecules, 2015

The present investigation focuses on the grafting of chitosan (CHT) with diisocyanate terminated polyurethane. Solid state 13C NMR spectroscopy confirms the grafting reaction and the degree of substitution (DS) was calculated from the deconvoluted area of the corresponding NMR peak. Solubility ...


Recrossing and Tunneling in the Kinetics Study of the OH + CH4 → H2O + CH3 Reaction

17.04.2015 | Yury V. Suleimanov; J. Espinosa-Garcia, Journal of Physical Chemistry B, 2015

Thermal rate constants and several kinetic isotope effects were evaluated for the OH + CH4 hydrogen abstraction reaction using two kinetics approaches, ring polymer molecular dynamics (RPMD) and variational transition state theory with multidimensional tunneling (VTST/MT), based on a refined ...


Unraveling the Conformational Landscape of Triallyl Phosphate: Matrix Isolation Infrared Spectroscopy and Density Functional Theory Computations

17.04.2015 | N. Ramanathan; C. V. S. Brahmmananda Rao; K. Sankaran; K. Sundararajan, Journal of Physical Chemistry A, 2015

The conformations of triallyl phosphate (TAP) were studied using matrix isolation infrared spectroscopy and density functional theory (DFT) calculations. TAP was trapped in N2, Ar, and Xe matrixes at 12 K using an effusive source and the resultant infrared spectra recorded. The computational ...


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