THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM

1. The permeability of Paramecium to NH(4)OH is greater when the cells are exposed to light than it is when they are in darkness. 2. This change can be demonstrated in cells exposed to monochromatic red light, though it is small. It becomes greater as the wave lengths shorten, and is greatest in the...

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Detalles Bibliográficos
Autor principal: Packard, Charles
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1925
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140708/
https://www.ncbi.nlm.nih.gov/pubmed/19872143
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author Packard, Charles
author_facet Packard, Charles
author_sort Packard, Charles
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description 1. The permeability of Paramecium to NH(4)OH is greater when the cells are exposed to light than it is when they are in darkness. 2. This change can be demonstrated in cells exposed to monochromatic red light, though it is small. It becomes greater as the wave lengths shorten, and is greatest in the near ultra-violet. 3. The permeability increases as the duration of exposure to light is prolonged. 4. These experiments demonstrate the necessity of controlling the illumination when using Paramecium in physiological tests.
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spelling pubmed-21407082008-04-23 THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM Packard, Charles J Gen Physiol Article 1. The permeability of Paramecium to NH(4)OH is greater when the cells are exposed to light than it is when they are in darkness. 2. This change can be demonstrated in cells exposed to monochromatic red light, though it is small. It becomes greater as the wave lengths shorten, and is greatest in the near ultra-violet. 3. The permeability increases as the duration of exposure to light is prolonged. 4. These experiments demonstrate the necessity of controlling the illumination when using Paramecium in physiological tests. The Rockefeller University Press 1925-01-20 /pmc/articles/PMC2140708/ /pubmed/19872143 Text en Copyright © Copyright, 1925, 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
Packard, Charles
THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title_full THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title_fullStr THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title_full_unstemmed THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title_short THE EFFECT OF LIGHT ON THE PERMEABILITY OF PARAMECIUM
title_sort effect of light on the permeability of paramecium
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140708/
https://www.ncbi.nlm.nih.gov/pubmed/19872143
work_keys_str_mv AT packardcharles theeffectoflightonthepermeabilityofparamecium
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