Fig. 1From: ESolvent-free, enzyme-catalyzed biodiesel production from mango, neem, and shea oils via response surface methodology a Influence of enzyme concentration on methyl ester yields of the three oils at constant temperature (45 °C), quantity of added water (10 %) and reaction time (24 h). b Influence of enzyme concentration (top) and temperature (bottom) on methyl ester yields of the three oils when the other parameters are maintained constant quantity of added enzyme concentration (6.5 %) water (10 %) and reaction time (24 h). c Influence of quantity of added water on methyl ester yields of the three oils at constant enzyme concentration (6.5 %), temperature (45 °C) and reaction time (24 h). d Influence of quantity of reaction time on methyl ester yields of the three oils at constant enzyme concentration (6.5 %), temperature (45 °C) and quantity of added water (10 %)Back to article page