Results: The technics was successfully improved due to its low cost, small toxicity, convenient disposition and high yield.
结果：优化后的制备工艺成本低，毒性小，后处理方便，提高了产率。
Biodegradable polymer materials had good biocompatibility. Polymer and degradation product had small toxicity to the body, which become new drug major carriers of microsphere formulations.
可生物降解高分子材料具有良好的生物相容性。聚合物和降解产物对机体毒副作用小，已成为微球等新药物剂型的重要载体材料。
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