Biological solar energy conversion: approaches to overcome yield, stability and product limitations. Progress report No. 2, October 1, 1975--March 31, 1976

Technical Report · Mon Mar 01 04:00:00 EST 1976

OSTI ID:5275679

Kok, B

Simultaneous measurements were made of the exchange of O/sub 2/, CO/sub 2/, H/sub 2/ and their isotopes in illuminated algae. A direct competition for the photosynthetic reducing power was observed between CO/sub 2/ uptake, O/sub 2/ uptake and H/sub 2/ evolution, with H/sub 2/ evolution being third in line. H/sub 2/ evolution and H-D scrambling occurred in presence of ca 1 percent O/sub 2/; H/sub 2/ uptake was less sensitive to O/sub 2/. Further studies were made of the stability of the photosynthetic electron transport chain in dark at 0/sup 0/. The two most sensitive sites were located between System II and the O/sub 2/ evolution system and between plastocyanin and plastoquinone. The second site was protected in intact chloroplasts. The two effects of glutaraldehyde--rate inhibition and stabilization--proved to have a similar dose requirement. The inhibition by this agent might be due to inactivation of plastocyanin.

• Research Organization: Martin Marietta Labs., Baltimore, Md. (USA)
• OSTI ID: 5275679
• Report Number(s): PB-258850; NSF/RA-760055; MML-TR-76-16C
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ADDITIVES
ALDEHYDES
ALGAE
AROMATICS
BENZOQUINONES
BIOCHEMICAL REACTION KINETICS
BIOMASS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLOROPLASTS
CONVERSION
CRYOGENIC FLUIDS
DEUTERIUM
DICARBOXYLIC ACIDS
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY CONVERSION
ENERGY SOURCES
ENZYMES
FLUIDS
GLUTARIC ACID
HYDROGEN
HYDROGEN ISOTOPES
HYDROGENASE
ISOTOPE APPLICATIONS
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LIGHT NUCLEI
MASS SPECTROSCOPY
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXIDOREDUCTASES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PIGMENTS
PLANTS
QUINONES
RADIATIONS
REACTION KINETICS
RENEWABLE ENERGY SOURCES
SOLAR ENERGY CONVERSION
SPECTROSCOPY
STABILITY
STABLE ISOTOPES
SYNTHESIS
TRACER TECHNIQUES
VISIBLE RADIATION
YIELDS