组织工程研究主要包括支架材料，细胞生物学，生物医学性能与安全性评价等方面的内容。
Tissue engineering research includes tissue engineering bracket material, cell biology, bio-medical evaluation of performance and safety aspects.
目的：评价可降解聚己内酯的体外生物学安全性。
OBJECTIVE:To evaluate the in vitro biological safety of degradable PCL.
本文对朊蛋白生物学特点、乳及乳制品中朊蛋白的来源和含量以及安全性进行了综述，以便为乳制品加工和安全评价提供参考。
In this paper, the biological character, source and content of prion proteins in milk and milk products and their safety were reviewed.
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