Results 321 to 330 of about 287,123 (361)
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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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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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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 ...
Joseph Le Brech +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 ...
Joseph Le Brech +2 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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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 ...
M, Helfrich +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, Frackowiak, D, Wróbel
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Dipole Strengths in the Chlorophylls¶†
Photochemistry and Photobiology, 2003Measurements of dipole strengths of chlorophylls in solution are reviewed and correlated. The refractive index dependence is found to be expressible in a simple empirical fashion that does not rely on the concept of vacuum dipole strength. The index dependence in some respects contradicts the dependence expected on the basis of effective field theories.
Robert S, Knox, Bryan Q, Spring
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Crystallization of Chlorophylls
Science, 1958L P, ZILL, G, COLMANO, H J, TRURNIT
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Chlorophyll cycle regulates the construction and destruction of the light-harvesting complexes
Biochimica Et Biophysica Acta - Bioenergetics, 2011Ryouichi Tanaka, Ayumi Tanaka
exaly