The enzymatic hydrolization of fish oil extracted from crude eel oil has been carried out using lipase L (Proc. 2nd Joint China/USA Chemical Engineering. Conference, Vol. III, p. 1082, 1997). One of the desired products is docosa- hexaenic acid, which is used as a medicine in China. For 40 mg of enzyme the Michaelis constant is 6.2 x 10-2 (mL/mL) and Vmax is 5.6 umol/mL min. Calculate the time necessary to reduce the concentration of fish oil from 1.4% to 0.2 vol %. Note: There may be an inconsistency in the article. The half life for an initial volume of 25% fish oil is stated to be 4.5 days. However, this yields a different initial fish oil concentration one finds from looking in the lit- erature. Search the web for fish oil. Suggest a way to resolve this controversy.