Production and stability studies of the bioemulsifier obtained from a new strain of Candida glabrata UCP 1002

• Leonie Asfora Sarubbo ^[1] ; Juliana Moura de Luna ^[1] ; Galba Maria de Campos-Takaki ^[1]
  1. [1] Núcleo de Pesquisas em Ciências Ambientais
• Localización: Electronic Journal of Biotechnology, ISSN-e 0717-3458, Vol. 9, Nº. 4, 2006
• Idioma: inglés
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• Resumen

  • Evaluation of both tenso-active and emulsifying activities indicated that a biosurfactant was produced by the newly isolated and promising strain Candida glabrata isolated from mangrove sediments. The extracellular water-soluble emulsifying agent was isolated and identified as a heteropolymer. The maximum of bioemulsifier production was observed when the strain was grown on soluble and insoluble substrates cotton seed oil plus glucose, reaching values of 10.0 g/l after 144 hrs at 200 rpm. The cell-free culture broth containing the examined agent lowered the surface tension of the medium to 31 mN/m. Stable and compact emulsions with emulsifying activity of 75% of cotton seed oil were detected. The emulsification capacity remained practically unaltered within a wide pH (2-12), temperature (4-80ºC) ranges and under NaCl concentrations up to 10%.