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Assessment of Rheological Behaviour of Water-in-Oil Emulsions Mediated by Glycolipid Biosurfactant Produced by Bacillus megaterium SPSW1001.
Singh, Varsha; Waris, Zairah; Banat, Ibrahim M; Saha, Sriparna; Padmanabhan, Padmini.
Afiliación
  • Singh V; Department of Bio-Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India.
  • Waris Z; Department of Bio-Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India.
  • Banat IM; School of Biomedical Sciences, Faculty of Life and Health Sciences, University of Ulster, Coleraine, BT52 1SA, Northern Ireland, UK.
  • Saha S; Department of Computer Science and Engineering, Indian Institute of Technology, Patna, Bihar, 801106, India.
  • Padmanabhan P; Department of Bio-Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India. padmini@bitmesra.ac.in.
Appl Biochem Biotechnol ; 194(3): 1310-1326, 2022 Mar.
Article en En | MEDLINE | ID: mdl-34694553
ABSTRACT
A screening programme using mineral salt medium supplemented with n-hexadecane resulted in isolating a Bacillus megaterium SPSW1001 which was capable of producing surface active molecules lowering culture medium surface tension to 27.43 ± 0.029 mN/m and interfacial tension to 0.38 ± 0.03 mN/m at 72 h and an emulsification index (E24) (85.63%). The biosurfactant product was further used to assess its effects on the rheological characteristics of water-in-oil emulsion prepared with engine oil. Structural characterization of the biosurfactant product by FTIR revealed a C-O-C stretch in sugar moiety and ester carbonyl linkage group between sugar and fatty acids, respectively, while mass spectral analysis revealed its glycolipid nature, with an m/z value of 662.44. The fluid behaviour of water-in-oil emulsion showed a non-Newtonian viscoelastic dilatant flow after yielding exemplified appropriately by Herschel-Bulkley model with 100% confidence of fit. The present study is significant in formulation and handling, processing, and transport of emulsion and in understanding flocculation characteristics.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Glucolípidos Tipo de estudio: Prognostic_studies Idioma: En Revista: Appl Biochem Biotechnol Año: 2022 Tipo del documento: Article País de afiliación: India

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Glucolípidos Tipo de estudio: Prognostic_studies Idioma: En Revista: Appl Biochem Biotechnol Año: 2022 Tipo del documento: Article País de afiliación: India