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"Second Emerson Effect" in the Hill Reaction of Chlorella Cells with Quinone as Oxidant
The second Emerson effect can be observed not only in photosynthesis but also in the photoreduction of quinone by Chlorella cells. This shows that this effect is not due to respiration and is notExpand
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Light curve and early spectral changes in Nova Cephei 1971
A light curve for Nova Cephei 1971 of photoelectric and photographic visual magnitudes observed between 28 June and 24 September 1971 is presented. A description of the spectral changes between 14Expand
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Localisation of chlorophyll within the chloroplast.
Abstract Silver nitrate reduction was shown to occur in illuminated suspensions of Hibiscus grana. The action spectrum of this reduction, the Molisch reaction, proved to coincide satisfactorily withExpand
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On the relation between size and photochemical activity of fragments of spinach grana.
1. 1. The relation between the size of fragments of disintegrated spinach grana and their photochemical activity in the Hill reaction was investigated. 2. 2. Reduction of the fragment size belowExpand
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On the role of the carotenoids in photosynthesis in Rhodospirillum rubrum.
  • J. B. Thomas
  • Biology, Medicine
  • Biochimica et biophysica acta
  • 1950
The photosynthetic action spectrum of Rhodospirillum rubrum Esmarck strain 4 was determined. Some carotinoids were found capable of absorbing photosynthetically active light. Apparently, however,Expand
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On the relation between phototaxis and photosynthesis in Rhodospirillum rubrum.
Abstract The relation between phototaxis and photosynthesis in Rhodospirillum rubrum has been studied. The light intensity at which saturation is reached in photosynthesis proved to coincide withExpand
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Inhibition of Photosynthesis in Certain Algae by Extreme Red Light.
This paper shows that in Porphyridium cruentum and in Chlorella pyrenoidosa (but apparently not in Anacystis nidulans) "extreme red" light (> 720 mmu) can inhibit photosynthesis produced by "far red"Expand
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Structure of the red absorption band of chlorophyll alpha in Aspidistra elatior.
  • J. B. Thomas
  • Chemistry, Medicine
  • Biochimica et biophysica acta
  • 7 May 1962
The red absorption band of chlorophyll a in chloroplasts of Aspidistra elatior consists of a main maximum and a number of weak shoulders. This number may vary in chloroplast preparations fromExpand
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Inhibition of Photosynthesis in Some Algae by Extreme-Red Light
Photosynthesis produced by far-red light (about 700 m�) is reversibly inhibited in some algae by extreme-red light (∼ 750 m�).
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pH-induced changes of the infrared absorption spectra of purple bacteria.
The pH dependence of the infrared absorption spectra of aqueous extracts from Chromatium strain D, Rhodopseudomonas spheroides, and Rhodospirillum rubrum strain 4 was studied. Experiments onExpand
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