Results 151 to 160 of about 138,541 (200)
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Synthesis of cyclic chlorophyll oligomers
Tetrahedron Letters, 2006Abstract As a new model of photosynthetic light-harvesting antennas, cyclic dimer, trimer, and tetramer of chlorophyllous moieties were prepared by intermolecular transesterification of a hydroxy-methoxycarbonyl-chlorin using 1,3-dichlorotetrabutyl distannoxane as a catalyst. 1 H NMR and UV–vis spectra showed that the cyclic oligomers tended to form
Shin-ichi Sasaki, Hitoshi Tamiaki
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Regulation of chlorophyll synthesis in photosynthetic bacteria
Journal of Bioenergetics, 1973Energy-transducing membranes of the nonsulfur purple photosynthetic bacteria are known to contain several species of bacteriochlorophyll (BChl) complexes. The reaction-centre complex (rc-BChl) is the locus of the charge separation that provides the “poles” of the photochemical electron transport system, whereas the other complexes serve lightharvesting
S, Lien, H, Gest, A, San Pietro
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Effect of lead ions on chlorophyll synthesis
Die Naturwissenschaften, 1974Seeds of Avena sativa were grown in the dark in wet vermiculite at 22/sup 0/C. When the seedlings were 16 days old, the primary leaf was cut into pieces. These leaf pieces were put 25-ml Erlenmeyer flasks in 10 ml glycylglycine with and without PbCl/sub 2/, and preincubated in the dark for 1 h.
R, Hampp, K, lendzian
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PARTIAL SYNTHESIS OF CHLOROPHYLL-A FROM RHODOCHLORIN
Tetrahedron, 1981Abstract A synthesis of chlorophyll-a from a relay degradation product, rhodochlorin dimethyl ester, is described. Key steps involve formation of methyl pheophorbide-a by thallium(III) promoted photocyclization of the corresponding chlorin-6- β -keto-esler, and magnesium(II) insertion using Eschenmoser's BHT method.
Kevin M. Smith, W. Michael Lewis
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PHOTOCONTROL OF ANTHOCYANIN SYNTHESIS: PHYTOCHROME, CHLOROPHYLL AND ANTHOCYANIN SYNTHESIS*
Photochemistry and Photobiology, 1974Abstract—Anthocyanin synthesis in cabbage and mustard seedlings depends upon duration and irradiance of the light treatment. The relative effectiveness of radiation in various spectral regions depends upon the length of the irradiation and decreases with increasing dose.
A. L. Mancinelli +2 more
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Synthesis of chlorophyll-f analogs possessing the 2-formyl group by modifying chlorophyll-a
Bioorganic & Medicinal Chemistry Letters, 2014A methyl group at the 2-position of methyl mesopyropheophorbide-a was transformed to the 2-formyl group to give methyl mesopyropheophorbide-f, one of the chlorophyll-f analogs. The 2-formylation moved the redmost electronic absorption band in a solution to a longer wavelength and the bathochromic shift was comparable to that by the 3-formylation.
Meiyun, Xu +2 more
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ChemInform Abstract: Chemistry of Chlorophylls: Synthesis
ChemInform, 1992AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Synthesis of stereospecifically face-protected chlorophyll derivatives
Tetrahedron Letters, 2005A pair of zinc chlorins having a bridged moiety between the 3 and 132-positions on the front or back side of its π-face were synthesized, and their asymmetric coordination ability towards pyridine was determined in benzene.
Shin-ichi Sasaki +3 more
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Intracellular Signaling and Chlorophyll Synthesis
2008The chloroplast proteome is encoded by genes that reside in both the chloroplast and the nucleus. This separation of genetic material necessitates a system for coordinating the expression of genes that reside in each compartment. Because the overwhelming majority of genes that encode chloroplast proteins reside in the nucleus, the regulation of nuclear
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Chloroplast Development: Fine Structure and Chlorophyll Synthesis
The Quarterly Review of Biology, 1972The light-induced development of chloroplast membranes has been widely studied and models describing the course of this development have been proposed by various investigators. The development of the chloroplanst in higher plants as described by von Wettstein is briefly reviewed.
Joanne Rosinski, Walter G. Rosen
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