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CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS

To account for the behavior of a solid particle in the interface between two fluids it is necessary to consider, as indicated by Clark Maxwell, three surface tensions: T(so), the tension in the interface between the solid particle and the organic phase; T(sw), the tension in the interface between so...

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Autores principales: Mudd, Stuart, Mudd, Emily B. H.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1924
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2128607/
https://www.ncbi.nlm.nih.gov/pubmed/19868948
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author Mudd, Stuart
Mudd, Emily B. H.
author_facet Mudd, Stuart
Mudd, Emily B. H.
author_sort Mudd, Stuart
collection PubMed
description To account for the behavior of a solid particle in the interface between two fluids it is necessary to consider, as indicated by Clark Maxwell, three surface tensions: T(so), the tension in the interface between the solid particle and the organic phase; T(sw), the tension in the interface between solid particle and aqueous phase; and T(ow), the organic phase-water interfacial tension. If T(so) > T(sw) + T(ow), (2), the stronger solid-organic phase tension should pull the line of intersection of the three phases around the periphery of the solid particle until the particle is completely enveloped in the water phase. If T(sw) > T(ow) + T(ow) (3), the solid-water tension should pull the line of meeting of the phases about the particle until it is enveloped in the organic phase. If See PDF for Equation the particle should be stable in the interface, only leaving it when mechanical work overcomes the equilibrium due to the balance of interfacial tensions. The ordinary bacteria used have been stable in the interfaces between water or aqueous solutions and all organic liquids tested; i.e., condition (4) obtains. In preparations in which T(ow) is large, stability has been found by experiment to be greater than when T(ow) is small, as follows from condition (4). The force, dependent upon condition (4), which holds bacteria in the liquid-liquid interface, and the force, dependent upon unequal distribution of tension in the liquid-liquid interface, which causes bacteria to glide along the interface, prove to be of the same order of magnitude as the force due to bacterial flagella. Interfacial tensions or its own motility may dominate the movement of the bacterium, according to circumstances. When bacteria thresh their way out of the interface, escape is into the aqueous phase. Acid-fast bacteria possess very low or, in some cases, no stability in the interface, passing easily or even spontaneously into the organic phase. Good evidence has been advanced by other workers to indicate that the surfaces of ordinary bacteria contain many polar radicals; on the other hand, the acid-fast microorganisms are coated with predominantly non-polar substances. It follows from known principles, therefore, that T(sw) should be greater than T(sw) with ordinary bacteria, and T(sw) should be greater than T(so) with acid-fast bacteria. Consideration of relations (2) and (3) above will show that these conditions should result in the differences in behavior of acid-fast and ordinary bacteria actually found by experiment. The theoretical and experimental data here developed contradict the theoretical formulations of the surface tension factor in phagocytosis advanced by Rhumbler and by Tait and substantiate those of Fenn.
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spelling pubmed-21286072008-04-18 CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS Mudd, Stuart Mudd, Emily B. H. J Exp Med Article To account for the behavior of a solid particle in the interface between two fluids it is necessary to consider, as indicated by Clark Maxwell, three surface tensions: T(so), the tension in the interface between the solid particle and the organic phase; T(sw), the tension in the interface between solid particle and aqueous phase; and T(ow), the organic phase-water interfacial tension. If T(so) > T(sw) + T(ow), (2), the stronger solid-organic phase tension should pull the line of intersection of the three phases around the periphery of the solid particle until the particle is completely enveloped in the water phase. If T(sw) > T(ow) + T(ow) (3), the solid-water tension should pull the line of meeting of the phases about the particle until it is enveloped in the organic phase. If See PDF for Equation the particle should be stable in the interface, only leaving it when mechanical work overcomes the equilibrium due to the balance of interfacial tensions. The ordinary bacteria used have been stable in the interfaces between water or aqueous solutions and all organic liquids tested; i.e., condition (4) obtains. In preparations in which T(ow) is large, stability has been found by experiment to be greater than when T(ow) is small, as follows from condition (4). The force, dependent upon condition (4), which holds bacteria in the liquid-liquid interface, and the force, dependent upon unequal distribution of tension in the liquid-liquid interface, which causes bacteria to glide along the interface, prove to be of the same order of magnitude as the force due to bacterial flagella. Interfacial tensions or its own motility may dominate the movement of the bacterium, according to circumstances. When bacteria thresh their way out of the interface, escape is into the aqueous phase. Acid-fast bacteria possess very low or, in some cases, no stability in the interface, passing easily or even spontaneously into the organic phase. Good evidence has been advanced by other workers to indicate that the surfaces of ordinary bacteria contain many polar radicals; on the other hand, the acid-fast microorganisms are coated with predominantly non-polar substances. It follows from known principles, therefore, that T(sw) should be greater than T(sw) with ordinary bacteria, and T(sw) should be greater than T(so) with acid-fast bacteria. Consideration of relations (2) and (3) above will show that these conditions should result in the differences in behavior of acid-fast and ordinary bacteria actually found by experiment. The theoretical and experimental data here developed contradict the theoretical formulations of the surface tension factor in phagocytosis advanced by Rhumbler and by Tait and substantiate those of Fenn. The Rockefeller University Press 1924-10-31 /pmc/articles/PMC2128607/ /pubmed/19868948 Text en Copyright © Copyright, 1924, by The Rockefeller Institute for Medical Research New York 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
Mudd, Stuart
Mudd, Emily B. H.
CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title_full CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title_fullStr CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title_full_unstemmed CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title_short CERTAIN INTERFACIAL TENSION RELATIONS AND THE BEHAVIOR OF BACTERIA IN FILMS
title_sort certain interfacial tension relations and the behavior of bacteria in films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2128607/
https://www.ncbi.nlm.nih.gov/pubmed/19868948
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