Results 211 to 220 of about 510,944 (265)

Densities of Liquid Silicates at High Pressures

Science, 1984
Densities of molten silicates at high pressures (up to ∼230 kilobars) have been measured for the first time with shock-wave techniques. For a model basaltic composition (36 mole percent anorthite and 64 mole percent diopside), a bulk modulus K s of ∼230 kilobars and a pressure derivative ( dK
Rigden, Sally M., Ahrens, Thomas J., Stolper, Edward M.   +2 more
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High-pressure liquid chromatography of peptides

Journal of Chromatography A, 1977
Peptides varying in size from di- to decapeptide have been subjected to high-pressure liquid chromatography on Phenyl-Corasil, Poragel PN, and Poragel PS under reversed-phase conditions with acetonitrile-water mixtures. It has been found that residual silanol groups in the Phenyl-Corasil and the functional groups in the Poragels significantly influence
J J, Hansen, T, Greibrokk, B L, Currie, K N, Johansson, K, Folkers   +4 more
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High frequency dynamics in liquid Cs at high pressure

The Journal of Chemical Physics, 2009
We report on an inelastic x-ray scattering investigation of the high frequency dynamics of liquid cesium at 493 K and 1 GPa, which corresponds to a density 23% higher than that at the room pressure melting point. The analysis of the spectra, performed within the framework of the memory function approach suggests the existence of two different ...
V. GIORDANO, MONACO G
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High-pressure liquid-liquid phase change in carbon

Physical Review B, 1993
The likelihood of a first-order liquid-liquid phase change in carbon from a mostly graphitic configuration to one that is more tetrahedral in character is explored. Liquid-phase changes in other materials are noted. Pertinent data on liquid carbon are reviewed and the model is briefly described.
, van Thiel M, , Ree
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Dissociation of Liquid Silica at High Pressures and Temperatures

Physical Review Letters, 2006
Liquid silica at high pressure and temperature is shown to undergo significant structural modifications and profound changes in its electronic properties. Temperature measurements on shock waves in silica at 70-1000 GPa indicate that the specific heat of liquid SiO2 rises well above the Dulong-Petit limit, exhibiting a broad peak with temperature that ...
Hicks, Damien, Boehly, T. R., Eggert, J. H., Miller, J. E., Celliers, P. M., Collins, G. W.   +5 more
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Photoinduced Reactivity of Liquid Ethanol at High Pressure

The Journal of Physical Chemistry B, 2010
The room temperature photoinduced reactivity of liquid ethanol has been studied as a function of pressure up to 1.5 GPa by means of a diamond anvil cell. Exploiting the dissociative character of the lowest electronic excited states, reached through two-photon absorption of near-UV photons (350 nm), irreversible reactive processes have been triggered in
CEPPATELLI, MATTEO, FANETTI, SAMUELE, CITRONI, MARGHERITA, BINI, ROBERTO   +3 more
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High pressure vapour-liquid equilibrium. III

Fluid Phase Equilibria, 1977
Abstract Wichterle, I., 1978. High pressure vapour-liquid equilibrium. II. Phenomenological description. Part 2. Fluid Phase Equilibria, 1: 225–245. A phenomenological description of fluid systems (except for l-g phase equilibrium) is presented.
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Liquid densities at high pressures

Fluid Phase Equilibria, 1999
Abstract Aalto et al. recently proposed a model for compressed liquid densities. The model was found more accurate than the Hankinson–Brobst–Thomson (HBT) and Chang–Zhao models. However, the pressure region of the data studied was limited to 200 bar maximum. In this work, the recently developed liquid density model is extended to high pressures.
Mika M Aalto, Kari I Keskinen
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Liquid-liquid partition coefficients by high-pressure liquid chromatography

Journal of Medicinal Chemistry, 1975
Lipid-water partition values can be rapidly and reliably measured by high-pressure liquid chromatography (HPLC) on bonded octadecylsialne supports. This method has been developed and applied to a family of hypotensive triaminopyrimidine 3-oxides. The measured column retention values for this class of compounds correlate well with the values calculated ...
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Laboratory Automation of High‐Pressure Liquid Chromatography

Journal of Pharmaceutical Sciences, 1975
An automated system for high-pressure liquid chromatography was developed. The system is built around commercial modules wherever possible, modified to varying degrees. An automatic sampler, a sample pump, a high-pressure sampling valve, a recorder with an integrator, and a high-pressure liquid chromatograph comprise the commercial instruments. Relays,
W F, Beyer, D D, Gleason
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