화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.36, No.16, 9620-9625, 2011
Effects of vitamins (nicotinic acid, vitamin B-1 and biotin) on phototrophic hydrogen production by Rhodobacter sphaeroides ZX-5
The effects of vitamins (nicotinic acid, vitamin B-1 and biotin) on the growth and hydrogen production of Rhodobacter sphaeroides ZX-5 were investigated by batch culture in this study. The results showed that nicotinic acid, as a precursor of NAD(+)/NADH, plays a crucial role in effectively enhancing the phototrophic hydrogen synthesis during photo-fermentation process. Lack of nicotinic acid in hydrogen production medium resulted in the failure of photo-hydrogen production. In addition, though vitamin B-1 and biotin do not have direct impact on photo-hydrogen production, they are still essential and must exist in either growth medium or hydrogen production medium. Without either of them, photo-hydrogen production decreased seriously, regardless of the existence of nicotinic acid. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.