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Shelnutt Powerpoint Presentation H generation for KAIST program 06282012
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2. Photosynthesis6H2O + 6CO2 -------> C6H12O6+ 6O2 Efficient utilization of solar energy (efficiency is 28% to ATP & NADPH). 30% loss of photons in the 400-700 nm range. Legacy of evolution explains part of the inefficiency of biological photosynthesis. The pigments evolved from pre-photosynthetic molecular machinery heme biosynthetic pathway. Further 32% loss in converting to glucose (9% as sugar); 7-8% sugarcane to biomass. Areas for improved efficiency in artificial photosynthesis. Capture more of photons in the 400-700 nm range better or additional pigments. Extent spectral range out to 900 nm. 3. Photosynthetic PigmentsPhycoerythrinChlorophyll a & b Biosynthesis of chlorophyll is a branch off the evolutionarily muchearlier synthetic pathway for synthesis of related heme proteins. 4. Photosynthetic Reaction Center Light-harvesting complex I & II and the photosynthetic reaction center site of charge separation. 5. Photosynthetic Reaction CenterOEC Light-harvesting complex I & II and the photosynthetic reaction center site of charge separation. 6. Reaction Center 3 pse-