Journal ArticleDOI
Penta- and disaccharide lipid formation by Nocardia corynebacteroides grown on n-alkanes
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TLDR
Both 1H and 13C nuclear magnetic resonance spectroscopic and elemental analysis studies led to the identification of one novel pentasaccharide lipid and two trehalose corynomycolates, which showed significant surface and interfacial active properties.Abstract:
Nocardia corynebacteroides SM1 synthesized di- and pentasaccharide lipids when grown on n-alkanes, especially under nitrogen limitation. Optimum conditions for their formation were pH 6.4–6.8, NaNO3 as nitrogen source and yeast extract supplementation of the nutrient. A study of the time course of whole glycolipid production was carried out in a 20-l bioreactor. After extraction of the culture broth with organic solvents three main components could be isolated. Both 1H and 13C nuclear magnetic resonance spectroscopic and elemental analysis studies led to the identification of one novel pentasaccharide lipid and two trehalose corynomycolates. The oligosaccharide lipid showed significant surface and interfacial active properties.read more
Citations
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Microbial production of surfactants and their commercial potential.
JD Desai,Ibrahim M. Banat +1 more
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Journal ArticleDOI
Nuclear Magnetic Resonance
TL;DR: Emsley and Waugh as mentioned in this paper published the Guide to the NMR Empirical Method A Workbook, which is based on the Bible jun.. Pp. xi + 305.
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Surface-active compounds from microorganisms.
TL;DR: Recent progress in the genetic and biochemical analysis of biosurfactant synthesis as well as the current status of fermentation technologies are discussed.
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Formation and physiological role of biosurfactants produced by hydrocarbon-utilizing microorganisms. Biosurfactants in hydrocarbon utilization.
TL;DR: A more differentiated view of microbial production of surface-active compounds is proposed, which suggests that biosurfactants should not only be regarded as prerequisites of hydrocarbon uptake, but also as secondary metabolic products.
Journal ArticleDOI
Microbial surfactant-enhanced mineral oil recovery under laboratory conditions
N.K. Bordoloi,Bolin Kumar Konwar +1 more
TL;DR: Biosurfactant produced by the promising bacterial isolates have been found to be effective in the recovery of crude oil from saturated column under laboratory conditions.
References
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A rapid and precise method for the determination of urea
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Nuclear Magnetic Resonance
TL;DR: Emsley and Waugh as mentioned in this paper published the Guide to the NMR Empirical Method A Workbook, which is based on the Bible jun.. Pp. xi + 305.
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Microbial production, structure elucidation and bioconversion of sophorose lipids
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Journal ArticleDOI
Isolation of a bioemulsifier from Candida lipolytica.
TL;DR: The yeast Candida lipolytica produced an inducible extracellular emulsification activity when it was grown with a number of water-immiscible carbon substrates and this emulsifier, which the authors named liposan, effected stable oil-in-water emulsions with a variety of hydrocarbons.
Journal ArticleDOI
Chemical and Physical Characterization of Interfacial-Active Lipids from Rhodococcus erythropolis Grown on n-Alkanes.
TL;DR: Lipophilic compounds of the culture suspension containing Rhodococcus erythropolis DSM43215 had surfactant properties when the bacteria were cultivated with n-alkanes as the sole carbon source and the interfacial properties were stabile in solutions with a wide range of pH and ionic strength.
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