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Applied Microbiology and Biotechnology

, Volume 52, Issue 4, pp 579–584 | Cite as

Preparation of stearoyl lactic acid ester catalyzed by lipases from Rhizomucor miehei and porcine pancreas optimization using response surface methodology

  • K. R. Kiran
  • N. G. Karanth
  • S. Divakar
ORIGINAL PAPER

Abstract

The esterification reaction between stearic acid and lactic acid using Rhizomucor miehei lipase and porcine pancreas lipase was optimized for maximum esterification using response surface methodology. The formation of the ester was found to depend on three parameters namely enzyme/substrate ratio, lactic acid (stearic acid) concentration and incubation period. The maximum esterification predicted by theoretical equations for both lipases matched well with the observed experimental values. In the case of R. miehei lipase, stearoyl lactic acid ester formation was found to increase with incubation period and lactic acid (stearic acid) concentrations with maximum esterification of 26.9% at an enzyme/substrate (E/S) ratio of 125 g mol−1. In the case of porcine pancreas lipase, esterification showed a steady increase with increase in incubation period and lactic acid (stearic acid) concentration independent of the E/S ratios employed. In the case of PPL, a maximum esterification of 18.9% was observed at an E/S ratio of 25 g mol−1 at a lactic acid (stearic acid) concentration of 0.09 M after an incubation period of 72 h.

Keywords

Ester Lipase Lactic Acid Response Surface Incubation Period 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • K. R. Kiran
    • 1
  • N. G. Karanth
    • 1
  • S. Divakar
    • 1
  1. 1.Department of Fermentation Technology and Bioengineering, Central Food Technological Research Institute, Mysore, 570 013, India e-mail: divakar@nicfos.ernet.in Tel.: +91-821-515792 Fax: +91-821-517233IN

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