REORIENTATION MEDIATED BY TRANSLATIONAL DIFFUSION AS A MECHANISM FOR NUCLEAR MAGNETIC-RELAXATION OF MOLECULES CONFINED IN SURFACE-LAYERS

被引：8

作者：

KIMMICH, R

机构：

[1] Universität Ulm, 7900 Ulm, Sektion Kernresonanzspektroscopie

来源：

MAGNETIC RESONANCE IMAGING | 1991年 / 9卷 / 05期

关键词：

TRANSLATIONAL DIFFUSION; PROTEINS; FINE PARTICLES; ANOMALOUS DIFFUSION; PERCOLATION THRESHOLD;

D O I：

10.1016/0730-725X(91)90369-W

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Translational diffusion of molecules on curved and rugged surfaces mediates reorientations and, hence, nuclear magnetic relaxation. The NMR field-gradient technique provides information about translational diffusion on a much longer length scale. Both techniques were applied to systems of hydrated and aggregated particles (proteins and silica fineparticles). The geometric restrictions imposed on water diffusion are discussed as well as the potentially anomalous time dependence of the mean square displacements.

引用

页码：749 / 751

页数：3

共 13 条

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