Solvent Sharing Models for Non-Interacting Solute Molecules: The Case of Glucose and Trehalose Water Solutions

被引：19

作者：

Fioretto, D. ^{[1
,2
]}

Comez, L. ^{[1
,3
]}

Corezzi, S. ^{[1
]}

Paolantoni, M. ^{[4
]}

Sassi, P. ^{[4
]}

Morresi, A. ^{[4
]}

机构：

[1] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy

[2] Univ Perugia, CEMIN, I-06123 Perugia, Italy

[3] Univ Perugia, Dipartimento Fis, IOM CNR, I-06123 Perugia, Italy

[4] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy

来源：

FOOD BIOPHYSICS | 2013年 / 8卷 / 03期

关键词：

Hydration water; Hydration of carbohydrates; Hydration number; Depolarized light scattering; Viscosity of water solutions; DEPOLARIZED LIGHT-SCATTERING; AQUEOUS-SOLUTIONS; NEUTRON-SCATTERING; DYNAMICS; HYDRATION; RELAXATION; DENSITY; MALTOSE; ALPHA; ALPHA-TREHALOSE; DILUTE;

D O I：

10.1007/s11483-013-9306-3

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The concentration dependence of hydration numbers of molecules modelled as nearly spherical particles is studied by simple analytic and numerical approaches, in the ideal limit of absence of intermolecular interactions. It is shown that the random close-to-contact condition achieved by solute molecules, noticeably affects the average hydration numbers. Comparison with experimental results obtained by light scattering in glucose and trehalose water solutions shows a reduction of the hydration number that is twice faster than that calculated in absence of interactions, suggesting important aggregation phenomena to occur in both systems, even at relatively low solute concentration. The effect of concentration on shear viscosity is also reported, suggesting that the leading contribution to the increase of viscosity arises from hydration water.

引用

页码：177 / 182

页数：6

共 43 条

[1] Water interaction with α,α-trehalose:: molecular dynamics simulation [J].