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STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.

Two races of paramecium were submitted for varying lengths of time to x-radiation and a large number of individuals were observed to determine the effect on the rate of division. The division rate of both races suffered a slight initial depression lasting for 2 to 5 days following the exposure. This...

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Autores principales: Hance, Robert T., Clark, Harry
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1926
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2131090/
https://www.ncbi.nlm.nih.gov/pubmed/19869106
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author Hance, Robert T.
Clark, Harry
author_facet Hance, Robert T.
Clark, Harry
author_sort Hance, Robert T.
collection PubMed
description Two races of paramecium were submitted for varying lengths of time to x-radiation and a large number of individuals were observed to determine the effect on the rate of division. The division rate of both races suffered a slight initial depression lasting for 2 to 5 days following the exposure. This depression is followed by complete recovery. Within rather wide limits the length of the exposure has, in these experiments, made no appreciable difference. Apparently the maximum effect of the x-rays is produced by relatively short exposures. Continued radiation produces little further change until exposures of 3 and 4 hours are used, when precisely the opposite results are obtained from those obtained with shorter exposures. Doses repeated at various intervals have in general failed to interfere more markedly with the division rate than a single dose. Repeated radiation causes the cells to become slightly swollen without apparent interference with their viability.
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spelling pubmed-21310902008-04-18 STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM. Hance, Robert T. Clark, Harry J Exp Med Article Two races of paramecium were submitted for varying lengths of time to x-radiation and a large number of individuals were observed to determine the effect on the rate of division. The division rate of both races suffered a slight initial depression lasting for 2 to 5 days following the exposure. This depression is followed by complete recovery. Within rather wide limits the length of the exposure has, in these experiments, made no appreciable difference. Apparently the maximum effect of the x-rays is produced by relatively short exposures. Continued radiation produces little further change until exposures of 3 and 4 hours are used, when precisely the opposite results are obtained from those obtained with shorter exposures. Doses repeated at various intervals have in general failed to interfere more markedly with the division rate than a single dose. Repeated radiation causes the cells to become slightly swollen without apparent interference with their viability. The Rockefeller University Press 1926-01-01 /pmc/articles/PMC2131090/ /pubmed/19869106 Text en Copyright © Copyright, 1926, 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
Hance, Robert T.
Clark, Harry
STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title_full STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title_fullStr STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title_full_unstemmed STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title_short STUDIES ON X-RAY EFFECTS : XIV. THE EFFECT OF X-RAY ON THE DIVISION RATE OF PARAMECIUM.
title_sort studies on x-ray effects : xiv. the effect of x-ray on the division rate of paramecium.
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2131090/
https://www.ncbi.nlm.nih.gov/pubmed/19869106
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