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Harmonic-Anharmonic Transition in Disaccharides/H2O Mixtures by EINS (Articolo in rivista)

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Harmonic-Anharmonic Transition in Disaccharides/H2O Mixtures by EINS (Articolo in rivista) (literal)

Anno

Alternative label

S. Magazù, G. Maisano, F. Migliardo, C. Mondelli (2004)
Harmonic-Anharmonic Transition in Disaccharides/H2O Mixtures by EINS
in Physica. B, Condensed matter (Print)
(literal)

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Dipartimento di Fisica and INFM, Universit \" a di Messina, P.O. Box 55, Messina I-98166, Italy Laboratoire de Dynamique et Structure des Mat!eriaux Mol!eculaires: U.R.A. 801, U.F.R. de Physique, B# atiment P5, Universit!e de Lille 1, Villeneuve d'Ascq C!edex 59655, France INFM-Operative Group Grenoble CRG IN13 and Institut Laue-Langevin, Grenoble Cedex 9 38042, France (literal)

Titolo

Abstract

This work furnishes new experimental findings on glass-forming systems, i.e. homologues disaccharides (trehalose, maltose, sucrose)/H2O mixtures obtained by using elastic incoherent neutron scattering. Such a technique allows to characterize the different degree of \"strength\" of the investigated systems by means of the analysis of both the elastic intensity and the mean square displacement behaviours as a function of temperature and Q. The better cryptoprotectant effectiveness of trehalose in comparison with the other disaccharides is ascribed to lower fragility of the matrix in which biostructures are immersed, i.e. of the trehalose/water mixture. (literal)

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