Figure 4From: Highly efficient enzymatic biodiesel production promoted by particle-induced emulsification Acyl migration study. The 2-monoolein (triangles) and 1-monoolein (squares) as a function of time using 4% w/v silica gel (35- to 70-μm particle size) as acyl migration promoter in the two-phase system (n-heptane/water 20%, solid lines) and in pure n-heptane (dotted lines).Back to article page