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Investigation Of The Triplet State Of Chlorophylls Technical Progress Report May 1 1979 April 30 1980
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Book Synopsis Investigation of the Triplet State of Chlorophylls. Technical Progress Report, May 1, 1979-April 30, 1980 by :
Download or read book Investigation of the Triplet State of Chlorophylls. Technical Progress Report, May 1, 1979-April 30, 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The triplet state of chlorophyll has been utilized as a nondestructive probe into the structural and dynamical nature of the photosynthetic apparatus, both in vitro and in isolated in vivo subunits. During the past year, using zero-field triplet state optically detected magnetic resonance spectroscopy, the research program has examined triplet energy transfer between photosynthetic pigments in solution; has isolated and studied subchloroplast particles enriched with photo-system I and the light harvesting chlorophyll protein (antenna) system; and has examined model chlorophyll-protein systems, specifically chlorophyll protein 668 and the reconstituted myoglobins. The overall aim of the research program has been to detail the physical features and interactions of the photosynthetic pigment systems through examination of structural subunits of the photosynthetic apparatus and model systems which represent them.
Book Synopsis Investigation of the Triplet State of Chlorophylls. Technical Progress Report, May 1, 1978--April 30, 1979 by :
Download or read book Investigation of the Triplet State of Chlorophylls. Technical Progress Report, May 1, 1978--April 30, 1979 written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The photoexcited triplet state properties of chlorophyll dimer systems in vitro were investigated by zero-field optically detected magnetic resonance (ODMR) spectroscopy at 2°K. Measurements of the triplet state zero-field splittings, overall triplet lifetimes, and individual spin sublevel intersystem crossing rate constants were obtained for solutions of chlorophyll a and zinc-substituted chlorophyll a and for the covalently linked dimeric derivative of pyrochlorophyllide a. The triplet state properties found for these systems are interpreted within the framework of the triplet exciton model to assess the applicability of the exciton approach in determining the geometry of chlorophyll aggregate systems and to evaluate structural features of chlorophyll systems proposed as models for in vivo chlorophyll.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Triplet State of Chlorophylls. Progress Report, May 1, 1980-April 30, 1981 by :
Download or read book Investigation of the Triplet State of Chlorophylls. Progress Report, May 1, 1980-April 30, 1981 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The triplet state of chlorophyll has been utilized as a nondestructive probe into the structural and dynamical nature of the photosynthetic apparatus. During the past year, using zero-field triplet state optically detected magnetic resonance spectroscopy, chlorophyll aggregates were examined in both their natural environment in vivo and in model complexes in vitro. Research efforts have focused on subchloroplast particles extracted from green plants, on chlorophyll monolayers, and on isolated chlorophyll molecules bound to both simple ligands and to complete proteins. The overall aim of the research program is to detail the physical features and interactions of the photosynthetic pigment systems through examination of structural subunits of the photosynthetic apparatus and model systems which represent them.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1983-09 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Triplet States of Chlorophylls. Progress Report, May 1, 1977--April 30, 1978. [Dimers; Bacteriochlorophyll]. by :
Download or read book Investigation of the Triplet States of Chlorophylls. Progress Report, May 1, 1977--April 30, 1978. [Dimers; Bacteriochlorophyll]. written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Triplet state properties of solutions containing chlorophyll monomers and dimers have been determined by optically detected magnetic resonance (ODMR) spectroscopy. Using a simple exciton formalism, the triplet state zero-field splittings and intersystem crossing rate constants found for the chlorophyll dimers and for the isolated chlorophyll molecule are utilized to determine the orientation of the pigment molecules in the dimer. The triplet state results indicate that water-linked chlorophyll dimers in vitro form single plane-parallel structures. Similar calculations using monomeric measurements by ODMR on bacteriochlorophyll and zero-field splittings for in vivo preparations of photosynthetic bacteria indicate that the dimer structures in vivo may be more complex than those observed in solution.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1983 with total page 1362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Medicine & Biology written by and published by . This book was released on 1983-09-27 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Energy Update written by and published by . This book was released on 1981 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow by : Aeronautical Research Council (Great Britain)
Download or read book Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow written by Aeronautical Research Council (Great Britain) and published by . This book was released on 1974 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1983 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1980 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiationless Energy Conversion of Photoexcited Triplet State of Organic Molecules. Progress Report for May 1, 1975--April 30, 1977 by :
Download or read book Radiationless Energy Conversion of Photoexcited Triplet State of Organic Molecules. Progress Report for May 1, 1975--April 30, 1977 written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During the initial two years of our ERDA-supported research program we have attempted to define and understand the mechanisms active in the intersystem crossing processes of large polycyclic hydrocarbons and chlorophyll. To study these excited states energy conversion processes we have utilized optical detection of magnetic resonance spectroscopy, as developed in our laboratory, which is uniquely applicable to these molecular systems. Our results on polycyclic hydrocarbons have shown that an understanding of triplet state radiationless transitions in planar aromatic molecules can be obtained from a consideration of the symmetry-selected spin-orbit interactions and positions of available mixing states; this work provides a predictive model of triplet state nonradiative energy conversion with general applicability to aromatic systems. This treatment has been applied successfully to chlorophyll triplet state dynamics and provides a basis for the utilization of the triplet state of chlorophyll as a (nondestructive) spin probe into the makeup of more complex chlorophyll-containing systems in vitro and in vivo.
Book Synopsis Faculties, Publications, and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities by : American Chemical Society. Committee on Professional Training
Download or read book Faculties, Publications, and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1981 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanisms of Photochemical Energy Conversion by Chlorophyll. Progress Report, April 1, 1980-March 30, 1981 by :
Download or read book Mechanisms of Photochemical Energy Conversion by Chlorophyll. Progress Report, April 1, 1980-March 30, 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results presented demonstrate that important progress has been made towards defining the elementary processes involved in chlorophyll one-electron transfer reactions. Considerable insight was obtained into how these can be made more efficient and how energy-wasting back reactions can be minimized. An understanding of the mechanisms involved in the coupling of these reactions in more complex systems to obtain a vectorial storage of energy across an insulating barrier (i.e. a lipid bilayer) is developing. The information must ultimately prove useful in the long-range goal of developing practical means of solar energy utilization. (ERB).
Download or read book Physics Briefs written by and published by . This book was released on 1980 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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