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Physiological tolerance and stoichiometric potential of cyanobacteria for hydrocarbon fuel production

Paper ID Volume ID Publish Year Pages File Format Full-Text
23652 43460 2012 8 PDF Available
Title
Physiological tolerance and stoichiometric potential of cyanobacteria for hydrocarbon fuel production
Abstract

Cyanobacteria are capable of directly converting sunlight, carbon dioxide and water into hydrocarbon fuel or precursors thereof. Many biological and non-biological factors will influence the ability of such a production system to become economically sustainable. We evaluated two factors in engineerable cyanobacteria which could potentially limit economic sustainability: (i) tolerance of the host to the intended end-product, and (ii) stoichiometric potential for production. Alcohols, when externally added, inhibited growth the most, followed by aldehydes and acids, whilst alkanes were the least inhibitory. The growth inhibition became progressively greater with increasing chain-length for alcohols, whilst the intermediate C6 alkane caused more inhibition than both C3 and C11 alkane. Synechocystis sp. PCC 6803 was more tolerant to some of the tested chemicals than Synechococcus elongatus PCC 7942, particularly ethanol and undecane. Stoichiometric evaluation of the potential yields suggested that there is no difference in the potential productivity of harvestable energy between any of the studied fuels, with the exception of ethylene, for which maximal stoichiometric yield is considerably lower. In summary, it was concluded that alkanes would constitute the best choice metabolic end-product for fuel production using cyanobacteria if high-yielding strains can be developed.

Keywords
Syn6803, Synechocystis sp. PCC 6803; Syn7942, Synechococcus sp. PCC 7942; FBA, flux balance analysis; SBML, Systems Biology Markup Language; BOF, biomass objective function; LHV, lower heating value; EFE, ethylene-forming enzymeCyanobacteria; Hydrocarbon;
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Physiological tolerance and stoichiometric potential of cyanobacteria for hydrocarbon fuel production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 162, Issue 1, 30 November 2012, Pages 67–74
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us