2.1. Materials
Pine sterol (91.0% β-sitosterol, 7.0% campesterol, 0.5% stigmasterol,
0.3% brassicasterol, and 1.2% others) was kindly donated from Jiangsu
Conat Biological Products Co., Ltd (Jiangsu, China); diatomite (200
mesh) was purchased from Aladdin (Shanghai, China);
FeCl3·6H2O,
FeCl2·4H2O,
3-mercaptopropyltriethoxysilane (97%), n-octadecyltriethoxysilane
(85%), Oleic acid (99.0%) were purchased from Sarn Chemical Technology
Co., Ltd (Shanghai, China).Candida rugosa lipase (type VII) was purchased from Sigma-Aldrich
(St. Louis, MO, USA).