نتایج جستجو برای: formation enthalpy changes

تعداد نتایج: 1363127  

1999
R. Najafabadi D. J. Srolovitz M. Atzmon

The enthalpies of formation of metastable fee Ag-Cu solid solutions, produced by ball milling of elemental powders, were determined by differential scanning calorimetry. Experimental thermodynamic data for these metastable alloys and for the equilibrium phases are compared with both calculation of phase diagrams (CALPHAD) and atomistic simulation predictions. The atomistic simulations were perf...

2016
Shevin Rizal Feroz Sri Nurestri Abdul Malek Saad Tayyab

The interaction between 6-shogaol, a pharmacologically active ginger constituent, and human serum albumin (HSA), the main in vivo drug transporter, was investigated using isothermal titration calorimetry (ITC). The value of the binding constant, Ka (5.02 ± 1.37 × 104 M−1) obtained for the 6-shogaol–HSA system suggested intermediate affinity. Analysis of the ITC data revealed feasibility of the ...

2014
Philip H. Stauffer K. C. Lewis Joshua S. Stein Bryan J. Travis Peter Lichtner George Zyvoloski

Wepresent a revised formof the energy balance for the coupled thermodynamics of liquid water flowing in porousmedia and give examples of situations where a commonly used formulation based on transport of enthalpy leads to erroneous results. Assuming negligible contribution from kinetic energy as well as sources and sinks such as energy from radioactive decay, total energy conservation is reduce...

Journal: :journal of physical & theoretical chemistry 2014
nasrin zeighami asadollah boshra mohammad reza gholami mehran aghaie

the doping reaction of truncated boron nitride and carbon nanotubes with aluminium atom wastheoretically investigated. the am1, pm3, and pm6 semiempirical methods have been used toevaluate the thermochemistry of doping reactions of single walled boron nitride nanotubes andcarbon nanotubes. the enthalpy changes, gibbs free energy changes, and entropy changes of studieddoping reactions were evalu...

2016
NIGEL AYLWARD

An ab initio method is used in a two state model to calculate consistent relative enthalpies and free energies for the stacking of nucleic acid bases in deoxyribose dinucleotides and the Watson-Crick hydrogen bonding interactions between mononucleotides when uncharged and singly charged. Favorable free energy changes are determined for the formation of dimers between mononucleotides by Watson-C...

Journal: :Plastic and reconstructive surgery 2015
Jason Silvestre Joseph M Abbatamatteo Benjamin Chang Joseph M Serletti

Results: A total of 247 plastic surgeons were included. 78.6% cited previous work at least once (mean 34.3 +/87.5 self-citations). These self-citations accounted for 4.8% of all citations. Including self-citations in bibliometric analyses increased h-indices from 9.5 +/6.9 to 10.2 +/7.6. A minority of researchers (20.1%) increased their h-index via self-citation by at least one integer value (r...

2014
JINQIANG CHEN SIMONA BORDONI

This paper investigates the dynamical processes throughwhich the Tibetan Plateau (TP) influences theEast Asian summer monsoon (EASM) within the framework of the moist static energy (MSE) budget, using both observations and atmospheric general circulation model (AGCM) simulations. The focus is on the most prominent feature of the EASM, the so-called meiyu–baiu (MB), which is characterized by a w...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
John M Richardson Maria M Lopez George I Makhatadze

It is known that different amino acid residues have effects on the thermodynamic stability of an alpha-helix. The underlying mechanism for the thermodynamic helical propensity is not well understood. The major accepted hypothesis is the difference in the side-chain configurational entropy loss upon helix formation. However, the changes in the side-chain configurational entropy explain only part...

Journal: :Physical chemistry chemical physics : PCCP 2012
Joana Vitorino Carlos E S Bernardes Manuel E Minas da Piedade

A general strategy to determine enthalpies of formation of protic ionic liquids, based solely on enthalpy of solution measurements, was conceived and tested for 1-methylimidazolium ethanoate, leading to Δ(f)H°(m){[Hmim][O(2)CCH(3)], 1} = -(425.7 ± 1.2) kJ mol(-1). This result in conjunction with the enthalpy of formation of gaseous 1-methylimidazole (mim) proposed in this work, Δ(f)H°(m)(mim, g...

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