Photosynthesis
With the establishment of conditions for optimum culturing and measurement, there is now final proof that in photosynthesis at high as well as low light intensities the light energy can be almost completely converted into chemical energy. There is thus drawn to a close an investigation that was init...
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American Association for the Advancement of Science (AAAS)
1958
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Online Access: | http://dx.doi.org/10.1126/science.128.3315.68 https://www.science.org/doi/pdf/10.1126/science.128.3315.68 |
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craaas:10.1126/science.128.3315.68 2024-09-09T19:36:07+00:00 Photosynthesis Experiments at the Max Planck Institute for Cell Physiology, Berlin-Dahlem, 1950-57, are described. Warburg, Otto 1958 http://dx.doi.org/10.1126/science.128.3315.68 https://www.science.org/doi/pdf/10.1126/science.128.3315.68 en eng American Association for the Advancement of Science (AAAS) Science volume 128, issue 3315, page 68-73 ISSN 0036-8075 1095-9203 journal-article 1958 craaas https://doi.org/10.1126/science.128.3315.68 2024-08-15T04:01:05Z With the establishment of conditions for optimum culturing and measurement, there is now final proof that in photosynthesis at high as well as low light intensities the light energy can be almost completely converted into chemical energy. There is thus drawn to a close an investigation that was initiated many years ago in Berlin in the Imperial Institute of Physics (9). The second result is the establishment of a general physical mechanism of photosynthesis, involving an interplay between light energy and respiratory energy, and therewith the solution of the quantum problem in photosynthesis. The third result is the establishment of the function of chlorophyll as a stoichiometric, chemically reacting component in photosynthesis. There remains the special chemistry of photosynthesis. In this still-unfinished field of investigation, the latest discovery is the labile carbon dioxide of Chlorella , connected with the decomposition and resynthesis of glutamic acid in living Chlorella , and connected with the possible function of the amino acids, aspartic and glutamic, in the binding and reduction of carbonic acid. The dissociating CO 2 is bound by Chlorella only in the presence of O 2 and of cellular glutamic acid. This CO 2 is released if the oxygen pressure is lowered below 2 mm of water or if—in the presence of oxygen—the glutamic acid is split in the living Chlorella , for example, by N /10,000 benzoquinone. This is the CO 2 that is used in light and taken up in the dark. Article in Journal/Newspaper Carbonic acid AAAS Resource Center (American Association for the Advancement of Science) Science 128 3315 68 73 |
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AAAS Resource Center (American Association for the Advancement of Science) |
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English |
description |
With the establishment of conditions for optimum culturing and measurement, there is now final proof that in photosynthesis at high as well as low light intensities the light energy can be almost completely converted into chemical energy. There is thus drawn to a close an investigation that was initiated many years ago in Berlin in the Imperial Institute of Physics (9). The second result is the establishment of a general physical mechanism of photosynthesis, involving an interplay between light energy and respiratory energy, and therewith the solution of the quantum problem in photosynthesis. The third result is the establishment of the function of chlorophyll as a stoichiometric, chemically reacting component in photosynthesis. There remains the special chemistry of photosynthesis. In this still-unfinished field of investigation, the latest discovery is the labile carbon dioxide of Chlorella , connected with the decomposition and resynthesis of glutamic acid in living Chlorella , and connected with the possible function of the amino acids, aspartic and glutamic, in the binding and reduction of carbonic acid. The dissociating CO 2 is bound by Chlorella only in the presence of O 2 and of cellular glutamic acid. This CO 2 is released if the oxygen pressure is lowered below 2 mm of water or if—in the presence of oxygen—the glutamic acid is split in the living Chlorella , for example, by N /10,000 benzoquinone. This is the CO 2 that is used in light and taken up in the dark. |
format |
Article in Journal/Newspaper |
author |
Warburg, Otto |
spellingShingle |
Warburg, Otto Photosynthesis |
author_facet |
Warburg, Otto |
author_sort |
Warburg, Otto |
title |
Photosynthesis |
title_short |
Photosynthesis |
title_full |
Photosynthesis |
title_fullStr |
Photosynthesis |
title_full_unstemmed |
Photosynthesis |
title_sort |
photosynthesis |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1958 |
url |
http://dx.doi.org/10.1126/science.128.3315.68 https://www.science.org/doi/pdf/10.1126/science.128.3315.68 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Science volume 128, issue 3315, page 68-73 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.128.3315.68 |
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Science |
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128 |
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3315 |
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68 |
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73 |
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1809905366290399232 |