Results 281 to 290 of about 784,267 (315)

Nucleation Dynamics of Water Nanodroplets

Microscopy and Microanalysis, 2014
AbstractThe origin of the condensation of water begins at the nanoscale, a length-scale that is challenging to probe for liquids. In this work we directly image heterogeneous nucleation of water nanodroplets by in situ transmission electron microscopy.
Bhattacharya, Dipanjan, Bosman, Michel, Mokkapati, Raghu Sarma, Leong, Fong Yew, Mirsaidov, Utkur   +4 more
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Light- and heavy-water dynamics

Physica B: Condensed Matter, 2000
Abstract We show first results of an analysis of the dynamics of water as observed by neutron scattering, based on a model common to both isotopic forms, H2O and D2O. Using incoherent scattering results from H2O, and the liquid structure factor of D2O, we show that within the framework of an approximation of decoupled motions, the H2O and D2O spectra
S Longeville, R.E Lechner
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Dynamics of Water in Biological Recognition

Chemical Reviews, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Pal, Samir Kumar, Zewail, Ahmed H.
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Slow Dynamics in Supercooled Water

MRS Proceedings, 1996
ABSTRACTWe review some recent results on the self-dynamics in deep supercooled (simulated) water, obtained by analyzing very long Molecular Dynamics simulations. We discuss the possibility of interpreting the observed slowing down of the dynamics in terms of Mode Coupling Theory for supercooled liquids and, at the same time, of associating the ...
Sciortino F, Tartaglia P, GALLO, PAOLA, Chen S. H.   +3 more
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Ultrafast Dynamics of a Spiropyran in Water

Journal of the American Chemical Society, 2012
The reversible switching of a water-soluble spiropyran compound is recorded over 1 ns by means of femtosecond vis-pump/vis- and IR-probe spectroscopy under aqueous conditions. Our investigations reveal that the photochemical conversion from the closed spiropyran to the open merocyanine takes 1.6 ps whereas the reversed photoreaction is accomplished ...
Jörg, Kohl-Landgraf, Markus, Braun, Cem, Özçoban, Diana P N, Gonçalves, Alexander, Heckel, Josef, Wachtveitl   +5 more
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The Dynamics of Water-Protein Interactions

Annual Review of Biophysics and Biomolecular Structure, 1996
The magnetic field and temperature dependence of the water proton nuclear spin-lattice relaxation rate requires that the motion timescale for water molecules in contact with proteins is close to that for pure water at room temperature. Nevertheless, there are a few water molecules, which may be detected by high-resolution, cross-relaxation spectroscopy,
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Water dynamics in DMSO–water mixture

Physica B: Condensed Matter, 2000
Abstract We study water dynamics in the eutectic DMSO–water mixture by incoherent quasielastic neutron scattering. Water individual motions are modelled by uncoupled whole-molecule translations and rotations around the center of mass. We determine water self-diffusion coefficients, residence times for jump diffusion and rotational relaxation times ...
J.T. Cabral, A. Luzar, J. Teixeira, M.-C. Bellissent-Funel   +3 more
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The dynamics of water in heterogeneous systems

Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1977
Abstract The basic principles of nuclear spin relaxation, dielectric relaxation and quasielastic neutron scattering and their use in studying the motions of water molecules are outlined. A summary is given of the time scales associated with the translational and rotational motions of water molecules and of intermolecular proton ...
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Collective Dynamical Properties of Liquid Water

Physical Review Letters, 1988
A theoretical and computer simulation analysis suggests that two collective modes can propagate in liquid water for wave vectors $kg0.64$ ${\mathrm{\AA{}}}^{\ensuremath{-}1}$. The low-frequency mode (ordinary sound) turns out to be associated with the oxygen density fluctuations, whereas the hydrogen density fluctuations are found to be governed by ...
Ricci, M. A., Rocca, D., Ruocco, G., Vallauri, R.   +3 more
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STRUCTURE AND DYNAMICS OF WATER SURROUNDING BIOMOLECULES

Annual Review of Biophysics and Biophysical Chemistry, 1987
PERSPECTIVES aND OVERVIEW 93 Hydration Water and Hydrogen Bonds: Experimental Difficulties, Cooperativity, and Three-Center Bonds 94 CYCLODEXTRIN HYDRATES AS MODEL SYSTEMS FOR THE STUDY OF HYDROGEN BONDING .. 96 Cooperativity in Cyclic Mot!fs Formed by O-H Groups 97 Cooperativity of Hydrogen Bonding Flip-Flop Dynamics ...
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