Hydrogen production by a green alga, chlamydomonas reinhardtii, in an alternating light/dark cycle
The evolution of H2 in the dark period of a light/dark cycle by a green alga, Chlamydomonas reinhardtii, was studied with the aim of developing a two-stage biophotolysis system. The algal cells accumulated starch during the growth period in light. When these cells were incubated microaerobically in the dark, hydrogenase activity was induced without an appreciable lag time and thereby H2 evolution was observed for several hours to more than 10 h, depending upon the amount of added O2. The cells harvested in the midlogarithmic growth phase were the most efficient in production of H2 in the dark. H2 evolution was highly dependent on temperature, but rather insensitive to pH values from 5-9. based on these observations, alternating production of O2 and H2 was demonstrated repeatedly in a 12-h light/dark cycle. (Refs. 11).
- Research Organization:
- Dept of Biochemical Engineering, Faculty of Pharmaceutical Sciences, Osaka Univ, Suita, Baka 565 Japan
- OSTI ID:
- 6282474
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 24:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
HYDROGEN PRODUCTION
BIOPHOTOLYSIS
CHLAMYDOMONAS
HYDROGENASES
PH VALUE
STARCH
ALGAE
BIOCONVERSION
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
ENZYMES
MICROORGANISMS
ORGANIC COMPOUNDS
OXIDOREDUCTASES
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLANTS
POLYSACCHARIDES
REAGENTS
SACCHARIDES
UNICELLULAR ALGAE
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)
080106 - Hydrogen- Production- Biosynthesis & Photochemical Processes