Bioprocess and Biosystems Engineering

, Volume 35, Issue 3, pp 351–358

Assessment of two immobilized lipases activity and stability to low temperatures in organic solvents under ultrasound-assisted irradiation

  • Luciane Batistella
  • Mara K. Ustra
  • Aline Richetti
  • Sibele B. C. Pergher
  • Helen Treichel
  • J. V. Oliveira
  • Lindomar Lerin
  • Débora de Oliveira
Original Paper

DOI: 10.1007/s00449-011-0573-4

Cite this article as:
Batistella, L., Ustra, M.K., Richetti, A. et al. Bioprocess Biosyst Eng (2012) 35: 351. doi:10.1007/s00449-011-0573-4

Abstract

Both stability and catalytic activity of two commercial immobilized lipases were investigated in the presence of different organic solvents in ultrasound-assisted system. In a general way, for Novozym 435, the use of ethanol as solvent led to a loss of activity of 35% after 10 h of contact. The use of iso-octane conducted to a gradual increase in lipase activity in relation to the contact time, reaching a maximum value of relative activity of 126%. For Lipozyme RM IM, after 5 h of exposure, the enzyme presented no residual activity when ethanol was used as solvent. The solvents tert-butanol and iso-octane showed an enhancement of about 20 and 17% in the enzyme activity in 6 h of exposure, respectively. Novozym 435 and Lipozyme IM presented high stability to storage after treatment under ultrasound-assisted system using n-hexane and tert-butanol as solvents.

Keywords

LipasesEnzyme activityUltrasound systemEnzyme stability

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Luciane Batistella
    • 1
  • Mara K. Ustra
    • 1
  • Aline Richetti
    • 1
  • Sibele B. C. Pergher
    • 2
  • Helen Treichel
    • 1
  • J. V. Oliveira
    • 1
  • Lindomar Lerin
    • 1
  • Débora de Oliveira
    • 1
  1. 1.Departamento de Engenharia de AlimentosUniversidade Regional Integrada do Alto Uruguai e das Missões, URI—Campus de ErechimErechimBrazil
  2. 2.Departamento de QuímicaUniversidade Federal do Rio Grande do Norte, Centro de Ciências ExatasNatalBrazil