منابع مشابه
Control Release from Low Acyle Gellan Gum Gels
Salt is a requirement material for human body but should be regulated as its excessive consumption might lead to heart disease and blood pressure. Processed foods due to high salt content might include about three quarter of the daily salt intake therefore many people consume more than their recommended allowances. Processed foods contain added salt for varieties of reasons namely to enhance th...
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CONSIDERABLE emphasis has been laid during recent years on the analogies between colloidal systems and lving cells in regard to their behaviour towards water and dissolved substances and it has become evident that the study of colloidal systems must throw light on the constitution and behaviour of living tissues. It is therefore of interest to enquire whether anything analogous to the phenomeno...
متن کاملSelf-diffusion of non-interacting hard spheres in particle gels.
Different kinds of particle gels were simulated using a process of random aggregation of hard spheres. The mean square displacement of Brownian spherical tracer particles through these rigid gels was monitored and the average diffusion coefficient, normalized with the free diffusion coefficient (D), was obtained. For each gel structure the effect of the gel volume fraction (φ) and size ratio of...
متن کاملAging of rotational diffusion in colloidal gels and glasses.
We study the rotational diffusion of aging Laponite suspensions for a wide range of concentrations using depolarized dynamic light scattering. The measured orientational correlation functions undergo an ergodic to nonergodic transition that is characterized by a concentration-dependent ergodicity-breaking time. We find that the relaxation times associated with rotational degree of freedom as a ...
متن کاملPartitioning and Diffusion of Macromolecules in Charged Gels
The macromolecular partition and diffusion coefficients are equally important in describing diffusion through gel membranes. The goals of this thesis were to determine what effects electrostatic, hydrodynamic and steric interactions have on the partitioning and diffusion of macromolecules in agarose gels. To accomplish this measurements of the partitioning and diffusivity of proteins and Ficoll...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1969
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed046p536