Results 301 to 310 of about 1,484,765 (329)

High pressure liquid chromatography of oligodeoxyribonucleotides

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1973
Abstract A high pressure liquid chromatography system capable of resolving oligodeoxy-ribonucleotides of intermediate size is described. Columns filled with a pellicular weak anion exchanger consisting of a polymeric aliphatic amine permit the rapid resolution of small amounts of oligomers.
A. de Czekala, J.E. Michaelewsky, T.F. Gabriel, A.L. Nussbaum, M. Holman, Alan F. Cook, Clifford L. Harvey   +6 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
K. Nils-Gunnarjohansson, Bruce L. Currie, Jan J. Hansen, Karl Folkers, Tyge Greibrokk   +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.
Francis H. Ree, M. van Thiel
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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, D. G., Boehly, T. R., Eggert, J. H., Miller, J. E., Celliers, P. M., Collins, G. W.   +5 more
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The viscosity of liquids at high pressures

Australian Journal of Chemistry, 1981
An equation is presented which represents the variation of viscosity of a liquid with pressure in terms of the compressibility (βT), thermal expansion (α) and molar volume (V) of the liquid (∂In η/∂P)T = βT+(Vα/2.45R) The derivation of the equation from an equation developed by Eyring and coworkers is given and the application of the equation is shown ...
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Viscosities of some liquids at high pressures [PDF]

Journal of Engineering Physics, 1975
Viscosity and solidification pressure are measured for spindle and castor oils, liquids PES-5, PES-S-2, PFMS-4, and polymethyltrifluoropropylsiloxane FS-169.
A. N. Krupina, E. V. Zolotykh, D. I. Kuznetsov   +2 more
openaire   +1 more source

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
openaire   +4 more sources

Compressibility of Solids and Liquids at High Pressures

Journal of Applied Physics, 1963
An equation for compressibility (identical in form to the Tait equation) derived previously from the virial theorem and the Fermi—Thomas atomic model is modified on the assumption that one of its parameters (αβ0) is reciprocally related to the internal pressure when the cohesive energy density is assumed to be an essential part of the internal pressure.
Melvin A. Cook, Leo A. Rogers
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High-pressured liquid chromatography of carotenoids

Journal of Chromatography A, 1978
Abstract The potential of high-pressure liquid chromatography (HPLC) for separation of carotenoids on silica has been studied with selected model carotenoids (carotenes, diols, cis—trans isomers and diastereoisomers) in comparison with conventional thin-layer chromatography and circular paper techniques.
Anne Fiksdahl, Julius T. Mortensen, Synnøve Liaaen-Jensen   +2 more
openaire   +2 more sources