The DOI matches its Crossref record; 23 of the 23 references it cites were found in a registry or an index.
Substrate and product inhibition of hydrogen production by the extreme thermophile, Caldicellulosiruptor saccharolyticus
Open accessAbstract
Substrate and product inhibition of hydrogen production during sucrose fermentation by the extremely thermophilic bacterium Caldicellulosiruptor saccharolyticus was studied. The inhibition kinetics were analyzed with a noncompetitive, nonlinear inhibition model. Hydrogen was the most severe inhibitor when allowed to accumulate in the culture. Concentrations of 5–10 m M H 2 in the gas phase (≡ partial hydrogen pressure (pH 2) of (1–2) · 10 4 Pa) initiated a metabolic shift to lactate formation. The extent of inhibition by hydrogen was dependent on the density of the culture. The highest tolerance for hydrogen was found at low volumetric hydrogen production rates, as occurred in cultures with low cell densities. Under those conditions the critical hydrogen concentration in the gas phase was 27.7 m M H 2 (≡ pH 2 of 5.6 · 10 4 Pa); above this value hydrogen production ceased completely. With an efficient removal of hydrogen sucrose fermentation was mainly inhibited by sodium acetate. The critical concentrations of sucrose and acetate, at which growth and hydrogen production was completely inhibited (at neutral pH and 70°C), were 292 and 365 m M, respectively. Inorganic salts, such as sodium chloride, mimicked the effect of sodium acetate, implying that ionic strength was responsible for inhibition. Undissociated acetate did not contribute to inhibition of cultures at neutral or slightly acidic pH. Exposure of exponentially growing cultures to concentrations of sodium acetate or sodium chloride higher than ca. 175 m M caused cell lysis, probably due to activation of autolysins. © 2003 Wiley Periodicals, Inc. Biotechnol Bioeng 81: 255–262, 2003.
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Metadata
- Authors
- van Niel, E. W. J., Claassen, P. A. M., & Stams, A. J. M.
- Venue
- Biotechnology and Bioengineering
- Publisher
- Wiley
- Published
- 2002-12-03
- Volume
- 81
- Issue
- 3
- Pages
- 255-262
- ISSN
- 0006-3592 (ISSN-L)
- 1097-0290
- OpenAlex
- W2099652227
- Cited by
- 364
- References
- 23
- FWCI
- 27.00
- Type
- journal article
- Language
- en
- Open access
- bronze
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