| 摘要 |
Solution of poly (DL-lactide-co-glycolides) in acetone is added a water solution or a fine powdered ascorbic acid so as to obtain micro capsules DLPLG/ ascorbic acid in the ratio of 85/15%, 70/30%, 50/50% and 30/70%, respectively. Introduction of up to 15% of scorbic acid impacts in no way the increase in the particles DLPLG while further incerease, adds to the increase of dimensions thereof. Upon the precipitation with alcohol methanol or ethanol, the particles are stabilized by zeta potential forming PVA and then centirfuged, decanted and dried.
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