Lipase activity was determined based on Cherry and Crandall (1932). The reaction mixture consisted of distilled water, tissue homogenate, phosphate buffer (0.1M, pH 7) and olive oil emulsion as substrate and incubated at 27 °C for 24 h. Then 95% alcohol and two drops of phenolphthalein indicator were added, and titrated against 0.05 N NaOH until the appearance of permanent pink color. A control with enzyme source is inactivated by keeping for 15min in boiling water bath prior to addition of buffer and olive oil emulsion. The milliequivalent of alkali consumed was taken as lipase activity.