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논문 기본 정보

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학술저널
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한국수소및신에너지학회 한국수소및신에너지학회논문집 한국수소 및 신에너지학회 논문집 제24권 제1호
발행연도
2013.2
수록면
20 - 28 (9page)

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Photobiological hydrogen production by nitrogen-fixing unicellular cyanobacteria has long been considered to be an environmentally sound and very promising method for the future supply of renewable clean energy. Using six Korean nitrogen-fixing unicellular cyanobacterial strains and the Synechococcus sp. strain Miami BG043511 we performed cultivation experiments to find out the strain-specific optimal temperature for population growth and H₂ production. Under 20℃ the population growth of all the tested strains was significantly retarded in contrasts to the faster and higher growth under 25, 30 or 35℃. The highest growth rates in all the 7 strains were measured under 30℃ while the maximal biomass yields were under 30℃ (strains CB-MAL 026, 054, and 055) or 35℃ (strains 002, 031, 058, and Miami BG043511). The difference between the maximal biomass yields at 30℃ and 35℃ was not greater than 10%. The quantity of photobiologically produced H₂ was only slight larger under 35℃ than that under 20℃. Our result may suggest a two-step process of H₂ production which includes rapid and sizable production of biomass at 30℃ and the following high H₂ production at 20℃ by the test strains of marine nitrogen-fixing unicellular cyanobacteria.

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