Article Abstract:
Examination of the bioavailability of naphthalene, solubilized by two nonionic surfactants, Brij 30 and Triton X-100, to naphthalene-degrading microorganisms by radiotracer and spectrophotometric techniques reveals that the bacteria are able to degrade the micelle-solubilized naphthalene. Analysis of the influence of aqueous, micellized nonionic surfactants on the microbial mineralization of salicyclic acid and naphthalene by batch experiments indicates that surfactant levels higher than critical micellar concentrations are not toxic to naphthalene-degrading microorganisms. Naphthalene mineralization is not inhibited by these surfactant micelles.
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Article Abstract:
Bacillus licheniformis produces lichenysin A, a lipopeptide biosurfactant which has seven amino acids in each molecule of the protein moiety. The bacteria grows on salty substrates and produces lichenysin A both aerobically and anaerobically. Lichenysin A reduces the interfacial tension between oil and salts and can be used for enhanced oil recovery at oil sites where salinity and temperature is very high. Lichenysin A is more effective at low concentrations because its critical micelle concentration is less.
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Article Abstract:
Analysis of ester-linked phospholipid fatty acids, multiplex PCR of microbial genes, and radiorespiratory techniques can be used to determine whether sediments containing polyaromatic hydrocarbons also contain the that can degrade PAHs. The sediments can then be bioremediated and used again.
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