Photosynthetic hydrogen and oxygen production: kinetic studies
Journal Article
·
· Science (Washington, D.C.); (United States)
Steady-state turnover times for simultaneous photosynthetic production of hydrogen and oxygen have been measured for two systems: the in vitro system comprised of isolated chloroplasts, ferredoxin, and hydrogenase, and the anaerobically adapted green alga Chlamydomonas reinhardtii (137c(+) mating type). In both systems, the simultaneous photoproduction of hydrogen and oxygen was measured by driving the systems into the steady state with repetitive, single-turnover, flash illumination. The turnover times for production of both oxygen and hydrogen in photosynthetic water splitting are in milliseconds and are equal to or less than the turnover time for carbon dioxide reduction in intact algal cells. The oxygen and hydrogen turnover times are therefore compatible with each other and partially compatible with the excitation rate of the photosynthetic reaction centers under conditions of solar irradiation.
- Research Organization:
- Oak Ridge National Lab., TN
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5622695
- Journal Information:
- Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 215; ISSN SCIEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ALGAE
BIOCONVERSION
BIOPHOTOLYSIS
BIOSYNTHESIS
CELL CONSTITUENTS
CHEMICAL REACTIONS
CHLAMYDOMONAS
CHLOROPLASTS
DECOMPOSITION
ELEMENTS
ENZYMES
FERREDOXIN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROGENASES
METALLOPROTEINS
MICROORGANISMS
NONMETALS
ORGANIC COMPOUNDS
OXIDOREDUCTASES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLANTS
PRODUCTION
PROTEINS
SYNTHESIS
UNICELLULAR ALGAE
WATER
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ALGAE
BIOCONVERSION
BIOPHOTOLYSIS
BIOSYNTHESIS
CELL CONSTITUENTS
CHEMICAL REACTIONS
CHLAMYDOMONAS
CHLOROPLASTS
DECOMPOSITION
ELEMENTS
ENZYMES
FERREDOXIN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROGENASES
METALLOPROTEINS
MICROORGANISMS
NONMETALS
ORGANIC COMPOUNDS
OXIDOREDUCTASES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLANTS
PRODUCTION
PROTEINS
SYNTHESIS
UNICELLULAR ALGAE
WATER