PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA

1. Blepharisma undulans, a protozoan with a reddish pigment, shows increased oxygen consumption under the influence of light. 2. If the light intensity is high, the animals are killed during a burst of oxygen consumption. 3. If the blepharismas are first bleached by exposure to light of low intensit...

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Detalles Bibliográficos
Autores principales: Giese, Arthur C., Zeuthen, Erik
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1949
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147171/
https://www.ncbi.nlm.nih.gov/pubmed/18114564
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author Giese, Arthur C.
Zeuthen, Erik
author_facet Giese, Arthur C.
Zeuthen, Erik
author_sort Giese, Arthur C.
collection PubMed
description 1. Blepharisma undulans, a protozoan with a reddish pigment, shows increased oxygen consumption under the influence of light. 2. If the light intensity is high, the animals are killed during a burst of oxygen consumption. 3. If the blepharismas are first bleached by exposure to light of low intensity they show only slightly increased oxygen consumption under the influence of light and they are not killed. 4. A preparation in which the animals are killed by heat still shows the increase in oxygen consumption on illumination with brilliant light. The supernatant solution does so as well, as does an alcohol extract of the dye. 5. The conclusion is drawn that the blepharismas are killed during photooxidation of the pigment, but the mechanism of action is not clear. Several possibilities are considered in the discussion.
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spelling pubmed-21471712008-04-23 PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA Giese, Arthur C. Zeuthen, Erik J Gen Physiol Article 1. Blepharisma undulans, a protozoan with a reddish pigment, shows increased oxygen consumption under the influence of light. 2. If the light intensity is high, the animals are killed during a burst of oxygen consumption. 3. If the blepharismas are first bleached by exposure to light of low intensity they show only slightly increased oxygen consumption under the influence of light and they are not killed. 4. A preparation in which the animals are killed by heat still shows the increase in oxygen consumption on illumination with brilliant light. The supernatant solution does so as well, as does an alcohol extract of the dye. 5. The conclusion is drawn that the blepharismas are killed during photooxidation of the pigment, but the mechanism of action is not clear. Several possibilities are considered in the discussion. The Rockefeller University Press 1949-03-20 /pmc/articles/PMC2147171/ /pubmed/18114564 Text en Copyright © Copyright, 1949, 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
Giese, Arthur C.
Zeuthen, Erik
PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title_full PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title_fullStr PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title_full_unstemmed PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title_short PHOTOOXIDATIONS IN PIGMENTED BLEPHARISMA
title_sort photooxidations in pigmented blepharisma
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2147171/
https://www.ncbi.nlm.nih.gov/pubmed/18114564
work_keys_str_mv AT giesearthurc photooxidationsinpigmentedblepharisma
AT zeuthenerik photooxidationsinpigmentedblepharisma

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