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THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS

1. In order to produce a response in Mya, the minimum amount of light energy required is 5.62 meter candle seconds. This energy follows the Bunsen-Roscoe law for the relation between intensity and time of exposure. 2. The necessary minimum amount of energy varies but little with the temperature; the...

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Detalles Bibliográficos
Autor principal: Hecht, Selig
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1920
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140367/
https://www.ncbi.nlm.nih.gov/pubmed/19871805
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author Hecht, Selig
author_facet Hecht, Selig
author_sort Hecht, Selig
collection PubMed
description 1. In order to produce a response in Mya, the minimum amount of light energy required is 5.62 meter candle seconds. This energy follows the Bunsen-Roscoe law for the relation between intensity and time of exposure. 2. The necessary minimum amount of energy varies but little with the temperature; the temperature coefficient for 10°C. is 1.06. 3. In view of these facts it is concluded that the initial action of the light is photochemical in nature. This substantiates the hypothesis previously suggested to account for the mechanism of photoreception. 4. The constant energy requirement for stimulation of Mya shows that the traditional division of animals into those which respond to a constant source of light and those which respond to a rapidly augmented light is without any fundamental significance for sensory physiology.
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spelling pubmed-21403672008-04-23 THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS Hecht, Selig J Gen Physiol Article 1. In order to produce a response in Mya, the minimum amount of light energy required is 5.62 meter candle seconds. This energy follows the Bunsen-Roscoe law for the relation between intensity and time of exposure. 2. The necessary minimum amount of energy varies but little with the temperature; the temperature coefficient for 10°C. is 1.06. 3. In view of these facts it is concluded that the initial action of the light is photochemical in nature. This substantiates the hypothesis previously suggested to account for the mechanism of photoreception. 4. The constant energy requirement for stimulation of Mya shows that the traditional division of animals into those which respond to a constant source of light and those which respond to a rapidly augmented light is without any fundamental significance for sensory physiology. The Rockefeller University Press 1920-01-20 /pmc/articles/PMC2140367/ /pubmed/19871805 Text en Copyright © Copyright, 1920, 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
Hecht, Selig
THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title_full THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title_fullStr THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title_full_unstemmed THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title_short THE PHOTOCHEMICAL NATURE OF THE PHOTOSENSORY PROCESS
title_sort photochemical nature of the photosensory process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2140367/
https://www.ncbi.nlm.nih.gov/pubmed/19871805
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