Materials
Green tea plant (Camellia sinensis ) belongs to the familyTheaceae was obtained from Isfahan province (Iran), lecithin
(99%, granular phosphatidylcholine) was procured from Across Company
(USA). Ethanol, glycerol, 2-2-diphenyl-1-pycrylhydrazyl (DPPH) and
Folin-ciocalteu reagent were prepared from Merck Company, Germany,
Particle size and Zeta-Sizer analyzer (Horiba scientific Instruments,
SZ-100 Series Germany), ultracentrifuge (Herolab, Hicen, Germany),
spectrophotometer model UV-6600 (Spectro Flex, Germany).