Results 261 to 270 of about 404,334 (292)

Vibrational relaxation in the HF–HCl,HF–HBr,HF–HI, and HF–DF systems

The Journal of Chemical Physics, 1973
The laser-excited fluorescence method has been employed to determine rate constants for vibrational energy transfer (V → V, R) and deactivation (V → R, T) processes in the HF–HCl,HF–HBr,HF-HI, and HF–DF systems at temperatures of 300 and 350°K. The rates exhibit a marked inverse temperature dependence indicative of strong attractive (hydrogen-bonding ...
Jeffrey L. Ahl, Terrill A. Cool
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Electric dipole moments of HF–C2H2, HF–C2H4, and HF–C3H6

The Journal of Chemical Physics, 1985
Electric dipole moments of HF–cyclopropane, HF–ethylene, and HF–acetylene have been determined using the molecular beam electric resonance technique. The dipole moments of HF–C3H6, HF–C2H4, and HF–C2H2 are 2.5084(28), 2.3839(45), and 2.3681(28) D, respectively.
D. D. Nelson, G. T. Fraser, W. Klemperer
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HF progression among outpatients with HF in a community setting

International Journal of Cardiology, 2019
Incidence and prognostic impact of heart failure (HF) progression has been not well addressed.From 2009 until 2015, consecutive ambulatory HF patients were recruited. HF progression was defined by the presence of at least two of the following criteria: step up of ≥1 New York Heart Association (NYHA) class; decrease LVEF ≥ 10 points; association of ...
Iorio, Annamaria, Rea, Federico, Barbati, Giulia, Scagnetto, Arjuna, Peruzzi, Elena, Garavaglia, Agnese, CORRAO, GIOVANNI, Sinagra, Gianfranco, Di Lenarda, Andrea   +8 more
openaire   +4 more sources

Spectroscopy of HF and HF-Containing Clusters in Solid Parahydrogen

The Journal of Physical Chemistry A, 2011
We report measurements of FT-IR absorption spectroscopy of HF, DF, and their clusters in solid parahydrogen (pH(2)). The observed spectra contain many absorption lines which were assigned to HF monomers, HF polymers, and clusters with other species, such as N(2), O(2), orthohydrogen (oH(2)), etc.
Yuki, Miyamoto, Hiroki, Ooe, Susumu, Kuma, Kentarou, Kawaguchi, Kyo, Nakajima, Itsuo, Nakano, Noboru, Sasao, Jian, Tang, Takashi, Taniguchi, Motohiko, Yoshimura   +9 more
openaire   +2 more sources

A Thermochemical Study Of The Ammonia.(n)hf-hf And Sodium-fluoride.(n)hf-hf.

1955
PhD ; Chemistry ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/181610/2/0021184 ...
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The nature of hydrogen bonding in the NN–HF, OC–HF, and HCN–HF complexes

The Journal of Chemical Physics, 1983
The nature of hydrogen bonding in the complexes NN–HF and OC–HF, as revealed from detailed ab initio electronic structure calculations, is unlike the bonding in the isoelectronic HCN–HF complex. The strong dipole–dipole attraction in HCN–HF is absent in the other two complexes.
Mark A. Benzel, Clifford E. Dykstra
openaire   +1 more source

Theoretical Potential Energy Curves for OH, HF+, HF, HF−, NeH+, and NeH

The Journal of Chemical Physics, 1972
Ab initio calculations have been carried out on the ground states of OH, HF+, HF, HF−, NeH+, and NeH. Extended basis sets were used and electron correlation was included by way of first-order wavefunctions. Dissociation energies and other spectroscopic constants are in good agreement with available experimental data except for the bond distance of HF+.
Vladimir Bondybey, Peter K. Pearson, Henry F. Schaefer   +2 more
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[The BLOCK HF study].

Giornale italiano di cardiologia (2006), 2013
N ...
BORIANI, Giuseppe, Sassone, Biagio
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???????????????????????? ?? ???????????????????????????????? ???????????????? ?????????????????????????????? ???????????????? Ti-Hf, (Ti-Hf)N ?? (Ti-Hf-Si)N, ???????????????????? ??????????????-?????????????? ????????????????????

2016
?????????????????????? ???????????????????????????????? ?? ???????????????????????? ???????????????? ???????????????? ?????????????????????????????? ????????????????, ?????????????????????????????? ????????????????-?????????????? ?????????????? ?? ?????????????????????? ???? ???????????????????? ???? ???????????? Ti, Hf, Si ?? N. ????????????????, ?????
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Formation of Powdered Hf–Ni, Hf–Cu and Hf–Ru Materials by Mechanical Alloying Methods

Materials Science and Engineering, 1988
Abstract Alloys of HfNi and HfCu were synthesized by mechanical alloying methods. In each system, single-phase amorphicity was found over a wide range of compositions using X-ray diffraction and differential thermal analysis. In a contrasting investigation of Hf50Ru50, the equilibrium compound was formed.
J.R. Thompson, C. Politis, Y.C. Kim
openaire   +1 more source