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Effects of selected electron transport chain inhibitors on 24-h hydrogen production by Synechocystis sp. PCC 6803

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Title: Effects of selected electron transport chain inhibitors on 24-h hydrogen production by Synechocystis sp. PCC 6803
Authors: Burrows, Elizabeth H. elizabeth.burrows@rutgers.edu, Chaplen, Frank W.R.1 chaplenf@engr.orst.edu, Ely, Roger L.1 ely@engr.orst.edu
Source: Bioresource Technology. Feb2011, Vol. 102 Issue 3, p3062-3070. 9p.
Subjects: Electron transport, Hydrogen production, Cyanobacteria, Hydrogenase, Algorithms, Photosynthesis, Cyanides, Glycogen
Abstract: Abstract: One factor limiting biosolar hydrogen (H2) production from cyanobacteria is electron availability to the hydrogenase enzyme. In order to optimize 24-h H2 production this study used Response Surface Methodology and Q2, an optimization algorithm, to investigate the effects of five inhibitors of the photosynthetic and respiratory electron transport chains of Synechocystis sp. PCC 6803. Over 3days of diurnal light/dark cycling, with the optimized combination of 9.4mM KCN (3.1μmol 1010 cells−1) and 1.5mM malonate (0.5μmol 1010 cells−1) the H2 production was 30-fold higher, in EHB-1 media previously optimized for nitrogen (N), sulfur (S), and carbon (C) concentrations (). In addition, glycogen concentration was measured over 24h with two light/dark cycling regimes in both standard BG-11 and EHB-1 media. The results suggest that electron flow as well as glycogen accumulation should be optimized in systems engineered for maximal H2 output. [ABSTRACT FROM AUTHOR]
Copyright of Bioresource Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effects of selected electron transport chain inhibitors on 24-h hydrogen production by Synechocystis sp. PCC 6803
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  Data: <searchLink fieldCode="AR" term="%22Burrows%2C+Elizabeth+H%2E%22">Burrows, Elizabeth H.</searchLink><i> elizabeth.burrows@rutgers.edu</i><br /><searchLink fieldCode="AR" term="%22Chaplen%2C+Frank+W%2ER%2E%22">Chaplen, Frank W.R.</searchLink><relatesTo>1</relatesTo><i> chaplenf@engr.orst.edu</i><br /><searchLink fieldCode="AR" term="%22Ely%2C+Roger+L%2E%22">Ely, Roger L.</searchLink><relatesTo>1</relatesTo><i> ely@engr.orst.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Bioresource+Technology%22">Bioresource Technology</searchLink>. Feb2011, Vol. 102 Issue 3, p3062-3070. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Electron+transport%22">Electron transport</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Cyanobacteria%22">Cyanobacteria</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogenase%22">Hydrogenase</searchLink><br /><searchLink fieldCode="DE" term="%22Algorithms%22">Algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Photosynthesis%22">Photosynthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Cyanides%22">Cyanides</searchLink><br /><searchLink fieldCode="DE" term="%22Glycogen%22">Glycogen</searchLink>
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  Data: Abstract: One factor limiting biosolar hydrogen (H2) production from cyanobacteria is electron availability to the hydrogenase enzyme. In order to optimize 24-h H2 production this study used Response Surface Methodology and Q2, an optimization algorithm, to investigate the effects of five inhibitors of the photosynthetic and respiratory electron transport chains of Synechocystis sp. PCC 6803. Over 3days of diurnal light/dark cycling, with the optimized combination of 9.4mM KCN (3.1μmol 1010 cells−1) and 1.5mM malonate (0.5μmol 1010 cells−1) the H2 production was 30-fold higher, in EHB-1 media previously optimized for nitrogen (N), sulfur (S), and carbon (C) concentrations (). In addition, glycogen concentration was measured over 24h with two light/dark cycling regimes in both standard BG-11 and EHB-1 media. The results suggest that electron flow as well as glycogen accumulation should be optimized in systems engineered for maximal H2 output. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Bioresource Technology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.biortech.2010.10.042
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        Text: English
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      – SubjectFull: Electron transport
        Type: general
      – SubjectFull: Hydrogen production
        Type: general
      – SubjectFull: Cyanobacteria
        Type: general
      – SubjectFull: Hydrogenase
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      – SubjectFull: Algorithms
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      – TitleFull: Effects of selected electron transport chain inhibitors on 24-h hydrogen production by Synechocystis sp. PCC 6803
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              Text: Feb2011
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