Purpose: Designing a set of downstream extracting craft and technical parameters that can be used in commercial production. Making the ha product reach the quality requirements of cosmetic grade ha.
目的：研究出一条可用于微生物发酵法生产HA的完整的下游分离工艺路线及其技术参数，使发酵的HA产品达到化妆品级HA的质量标准。
The quality levels of cosmetic ingredients don't vary that much and every company that buys cosmetic-grade ingredients all buy the same quality.
化妆品成分的质量等级相差不是很大，每家购进化妆品级原料的公司其所购物品的质量都是相同的。
The quality levels of cosmetic ingredients don't vary that much, and every company that buys cosmetic-grade ingredients all buy the same quality.
化妆品成分的质量等级相差不是很大，每家购进化妆品级原料的公司其所购物品的质量都是相同的。
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