STRUCTURE AND PHYSICOCHEMICAL PROPERTIES OF GLYCOLIPID BIOSURFACTANT, PRODUCED BY OIL-DEGRADING BACTERIA RHODOCOCCUSSP. X5
https://doi.org/ 10.21285/2227-2925-2017-7-2-72-79
Abstract
N this study it was reported, that significant biosurfactants produced by Rhodococcus sp. X5 grown on n-hexadecane, are succinoyl trehalose tetraesters. The structural characterization of trehalolipids was determined based on MS/MS and GC/MS analysis. Succinoyl trehalolipids from Rhodococcus sp. X5 exhibit high surface activity (27 mN/m) and emulsifying activity (E24 - 55%). Biosurfactants were characterized by the next physico-chemical indications - minimum surface tension (27 mN/m), critical micelle concentration (4,1·10-5 mol/l),hydrophilic - lipophilic balance (7-8), the maximum number of molecule adsorbed per unit area (1,27·10-5mol/m2), the minimum area per molecule biosurfactant (13 nm2), Gibbs free energy of adsorption (-35 kJ/mol). The results demonstrate that studied trehalolids are capable to increase wetting the surface of hydophobic compounds by water and to form type of emulsion “oil/water”.
About the Authors
T. M. Postgraduate Student
Tula State University
Russian Federation
Russian Federation
I. A. Nechaeva
Tula State University
Russian Federation
Russian Federation
K. V. Petrikov
G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences
Russian Federation
Russian Federation
A. E. Filonov
G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences
Russian Federation
Russian Federation
O. N. Ponamoreva
Tula State University
Russian Federation
Russian Federation
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Review
For citations:
Postgraduate Student T.M., Nechaeva I.A., Petrikov K.V., Filonov A.E., Ponamoreva O.N. STRUCTURE AND PHYSICOCHEMICAL PROPERTIES OF GLYCOLIPID BIOSURFACTANT, PRODUCED BY OIL-DEGRADING BACTERIA RHODOCOCCUSSP. X5. Proceedings of Universities. Applied Chemistry and Biotechnology. 2017;7(2):72-79. (In Russ.) https://doi.org/ 10.21285/2227-2925-2017-7-2-72-79
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