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AJN, American Journal of Nursing, 1955 keeps things outdoors a beautiful green, is one of the most unravelled mysteries of the organic world. We are just scratching the surface of a partial understanding of its properties and the values it may hold when it is used properly. Chlorophyll is the catalyst that converts moisture, carbon dioxide, and the sun's energy-by some means-into the ...
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Chlorophyll synthetase in chlorophyll-free chromoplasts
Plant Cell Reports, 1981A considerable incorporation of [1-(14)C]isopentenyl diphosphate into chlorophyll in chromoplast preparations from daffodil flowers (Narcissus pseudonarcissus L.) was observed when exogenous chlorophyllide a was added. The enzyme chlorophyll synthetase showed properties of a peripheral membrane protein.
Klaus Kreuz, Hans Kleinig
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Photosynthesis Research, 2015
Oxygenic photosynthesis requires chlorophyll (Chl) for the absorption of light energy, and charge separation in the reaction center of photosystem I and II, to feed electrons into the photosynthetic electron transfer chain. Chl is bound to different Chl-binding proteins assembled in the core complexes of the two photosystems and their peripheral light ...
Peng Wang, Bernhard Grimm
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Oxygenic photosynthesis requires chlorophyll (Chl) for the absorption of light energy, and charge separation in the reaction center of photosystem I and II, to feed electrons into the photosynthetic electron transfer chain. Chl is bound to different Chl-binding proteins assembled in the core complexes of the two photosystems and their peripheral light ...
Peng Wang, Bernhard Grimm
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Chemical Physics Letters, 1974
Abstract A molecular orbital calculation, using the “free-electron-network” method, is reported for the absorption spectrum of chlorophyll a and the complexes chlorophyll/ p -dioxane and chlorophyll/ p -benzoquinone. For chlorophyll a , our results are in good agreement with experiment and are substantially the same as those obtained by Weiss ...
Roger M. Leblanc +2 more
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Abstract A molecular orbital calculation, using the “free-electron-network” method, is reported for the absorption spectrum of chlorophyll a and the complexes chlorophyll/ p -dioxane and chlorophyll/ p -benzoquinone. For chlorophyll a , our results are in good agreement with experiment and are substantially the same as those obtained by Weiss ...
Roger M. Leblanc +2 more
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Biosynthesis of chlorophyll b and the chlorophyll cycle
Photosynthesis Research, 2002Recent progress in the knowledge of chlorophyll b biosynthesis from chlorophyllide a and reduction of chlorophyll b to chlorophyll a is described. The minireview includes a description of the enzymes involved in these reactions and, where appropriate, of the genes encoding these enzymes.
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Critical Reviews in Food Science and Nutrition, 1990
Revue bibliographique sur les techniques d'extraction, les proprietes spectroscopiques et l'analyse chromatographique des chlorophylles des fruits et legumes et sur leur alteration au cours de la senescence et des processus de transformation ou de ...
Steven J. Schwartz, Tina V. Lorenzo
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Revue bibliographique sur les techniques d'extraction, les proprietes spectroscopiques et l'analyse chromatographique des chlorophylles des fruits et legumes et sur leur alteration au cours de la senescence et des processus de transformation ou de ...
Steven J. Schwartz, Tina V. Lorenzo
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The aggregation of chlorophyll a
Archives of Biochemistry and Biophysics, 1964Abstract 1. 1. Aggregation of chlorophyll a in various nonpolar solvents has been demonstrated, and from the IR spectra the probable site of the hooking together of the molecules has been deduced. 2. 2. If chlorophyll a exists in the cell in a completely nonpolar milieu (as the visible spectroscopic studies suggest), then CCl4 solutions of ...
A. F. H. Anderson, Melvin Calvin
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Chlorophyll synthetase cannot synthesize chlorophyll a′
European Journal of Biochemistry, 1994Chlorophyll synthetase catalyzes the last step of chlorophyll biosynthesis, namely prenylation (esterification) of chlorophyllide with phytyl diphosphate or geranylgeranyl diphosphate. During investigation of various chlorophyllide derivatives as potential substrates we observed lower esterification with increasing percentages of chlorophyllide a′ in ...
Siegrid Schoch +4 more
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Chlorophylls and chlorophyll derivatives
1996Chlorophyll derivatives form a significant and growing element in the range of natural pigments used as food colorants. An account is provided of the methods of production and of the products formed under industrial conditions. Consideration is given to the formation of chlorophyll under biological conditions, together with a comprehensive summary of ...
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Energy transfer between Chlorophyll C and Chlorophyll A
Biophysical Chemistry, 1973Abstract Spectral properties of solutions containing mixtures of chlorophyll a and chlorophyll c are investigated. The yield of excitation energy migration from chlorophyll c to chlorophyll a is obtained ranging from 23 to 48% dependent on the used dye concentrations. The back transfer from chlorophyll a to chlorophyll c is negligible.
D. Wróbel, Danuta Frackowiak
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