Cargando…

ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.

1. When solutions of KCl, NaCl, or LiCl are separated from water without salt by a collodion-gelatin membrane and when the pH of both salt solution and water are on the acid side of the isoelectric point of gelatin, water diffuses from the side of pure water into the salt solution at a rate increasi...

Descripción completa

Detalles Bibliográficos
Autor principal: Loeb, Jacques
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1922
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140524/
https://www.ncbi.nlm.nih.gov/pubmed/19871961
_version_ 1782144002084044800
author Loeb, Jacques
author_facet Loeb, Jacques
author_sort Loeb, Jacques
collection PubMed
description 1. When solutions of KCl, NaCl, or LiCl are separated from water without salt by a collodion-gelatin membrane and when the pH of both salt solution and water are on the acid side of the isoelectric point of gelatin, water diffuses from the side of pure water into the salt solution at a rate increasing inversely with the radius of the cations. 2. The adsorption theory would lead us to assume that this influence of the cations is due to an increase of the P.D. between the liquid and the membrane inside the pores of the gelatin film of the membrane, but direct measurements of this P.D. contradict such an assumption, since they show that the influence of the three salts on this P.D. is identical at pH 3.0. 3. It is found, however, that the P.D. across the membrane is affected in a similar way by the three cations as is the transport of water through the membrane. 4. This P.D. across the membrane varies inversely as the relative mobility of the three cations which suggests that the influence of the three cations on the diffusion of liquid through the membrane is partly if not essentially due to a diffusion potential.
format Text
id pubmed-2140524
institution National Center for Biotechnology Information
language English
publishDate 1922
publisher The Rockefeller University Press
record_format MEDLINE/PubMed
spelling pubmed-21405242008-04-23 ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION. Loeb, Jacques J Gen Physiol Article 1. When solutions of KCl, NaCl, or LiCl are separated from water without salt by a collodion-gelatin membrane and when the pH of both salt solution and water are on the acid side of the isoelectric point of gelatin, water diffuses from the side of pure water into the salt solution at a rate increasing inversely with the radius of the cations. 2. The adsorption theory would lead us to assume that this influence of the cations is due to an increase of the P.D. between the liquid and the membrane inside the pores of the gelatin film of the membrane, but direct measurements of this P.D. contradict such an assumption, since they show that the influence of the three salts on this P.D. is identical at pH 3.0. 3. It is found, however, that the P.D. across the membrane is affected in a similar way by the three cations as is the transport of water through the membrane. 4. This P.D. across the membrane varies inversely as the relative mobility of the three cations which suggests that the influence of the three cations on the diffusion of liquid through the membrane is partly if not essentially due to a diffusion potential. The Rockefeller University Press 1922-05-20 /pmc/articles/PMC2140524/ /pubmed/19871961 Text en Copyright © Copyright, 1922, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Loeb, Jacques
ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title_full ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title_fullStr ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title_full_unstemmed ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title_short ELECTRICAL CHARGES OF COLLOIDAL PARTICLES AND ANOMALOUS OSMOSIS : II. INFLUENCE OF THE RADIUS OF THE ION.
title_sort electrical charges of colloidal particles and anomalous osmosis : ii. influence of the radius of the ion.
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140524/
https://www.ncbi.nlm.nih.gov/pubmed/19871961
work_keys_str_mv AT loebjacques electricalchargesofcolloidalparticlesandanomalousosmosisiiinfluenceoftheradiusoftheion