Results 311 to 320 of about 22,909,306 (342)
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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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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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Measurement of Chlorophyll a and Carotenoids Concentration in Cyanobacteria
, 2015This is a protocol for precise measurement of chlorophyll a and total carotenoid concentrations in cyanobacteria cells. Cellular chlorophyll concentration is one of the central physiological parameters, routinely followed in many research areas ranging ...
T. Zavřel, M. Sinetova, J. Červený
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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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Journal of plant physiology, 2003
Leaf chlorophyll content provides valuable information about physiological status of plants. Reflectance measurement makes it possible to quickly and non-destructively assess, in situ, the chlorophyll content in leaves.
A. Gitelson, Yuri A. Gritz, M. Merzlyak
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Leaf chlorophyll content provides valuable information about physiological status of plants. Reflectance measurement makes it possible to quickly and non-destructively assess, in situ, the chlorophyll content in leaves.
A. Gitelson, Yuri A. Gritz, M. Merzlyak
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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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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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Current Opinion in Plant Biology, 2006
Since the 1970s, researchers have proposed several regulatory pathways governing chlorophyll metabolism, but only recently have the underlying molecular mechanisms been elucidated. The recent data indicate that such regulatory systems are more complex than originally anticipated.
Ayumi, Tanaka, Ryouichi, Tanaka
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Since the 1970s, researchers have proposed several regulatory pathways governing chlorophyll metabolism, but only recently have the underlying molecular mechanisms been elucidated. The recent data indicate that such regulatory systems are more complex than originally anticipated.
Ayumi, Tanaka, Ryouichi, Tanaka
openaire +2 more sources