Abstract
The NaCl concentration of the growth medium affected hydrogen production by Lyngbya sp. (No. 108) strain. Cells grown in medium containing 3% NaCl produced the most hydrogen. The carbohydrate content of this strain also increased with increasing NaCl concentration of the growth medium up to 720 fig/mg cells at 5 % NaCl. In the presence of 20 finlol/ml MFA (monofluoroacetic acid), inhibition of hydrogen production was observed. We extracted the glycogen from this nonheterocystous filamentous cyanobacterium, Lyngbya sp. (No. 108), and observed that glycogen and carbohydrate consumption of this strain is coincident with hydrogen production.These results led us to the conclusion that the reserve glycogen or other carbohydrate were used as sources of electron donors for hydrogen production, and that the NaCl concentration of the medium affected the hydrogen production by this strain.
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