Regulation of hydrogen photoproduction in Rhodobacter sphaeroides batch culture by external oxidizers and reducers

被引：26

作者：

Gabrielyan, Lilit ^{[1
]}

Sargsyan, Harutyun ^{[2
]}

Hakobyan, Lilit ^{[1
]}

Trchounian, Armen ^{[2
]}

机构：

[1] Yerevan State Univ, Dept Biophys, Yerevan 0025, Armenia

[2] Yerevan State Univ, Dept Microbiol & Plants & Microbes Biotechnol, Fac Biol, Yerevan 0025, Armenia

来源：

APPLIED ENERGY | 2014年 / 131卷

关键词：

Hydrogen photoproduction; Redox potential; Redox reagents; F0F1-ATPase activity; Rhodobacter sphaeroides; FERMENTATIVE H-2 PRODUCTION; ESCHERICHIA-COLI; OXIDATION-REDUCTION; NITROGENASE; GROWTH; F0F1-ATPASE; MEMBRANE;

D O I：

10.1016/j.apenergy.2014.06.019

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Photo-fermentative production of hydrogen (H-2) by purple bacterium Rhodobacter sphaeroides MDC6521 from Armenian mineral springs and its regulation by external reducers and oxidizers have been investigated. Reducers such as DL-dithiothreitol (DTT) and dithionite suppress bacterial growth but enhance H-2 yield of R. sphaeroides, whereas oxidizer ferricyanide inhibits both processes. The effect of DTT on DCCD-inhibited F0F1-ATPase activity of R. sphaeroides membrane vesicles has been analyzed too. DTT increases the DCCD-inhibited ATPase activity. Thus, more negative values of E-h by addition of DU might regulate F0F1-ATPase activity. The participation of the ATPase in redox sensing under photo-fermentative H-2 production is suggested. This enzyme might be a target, having a significant role in these processes of purple bacteria. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：20 / 25

页数：6

共 40 条

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[15] Long-term H2 photoproduction from starch by co-culture of Clostridium butyricum and Rhodobacter sphaeroides in a repeated batch process
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