目的进一步探讨胎盘因子（PF）的生物活性。

Objective To study the biological activity of placenta factor(PF) .

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成份：胶原蛋白、植物复合精华萃取液、活性蛋白、高效美白因子。

Ingredients: Collagen, compound plant essence, active protein, high efficiency whitening factor.

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而细胞因子白细胞介素2的活性未见有明显变化。

But the activity of IL 2 had no significant change.

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本文对神经营养因子在活性神经导管中的应用方式进行综述。

This review will present neurotrophic factor delivery systems applied in those conduits.

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本文对神经营养因子在活性神经导管中的应用方式进行综述。

This review will present neurotrophic factor delivery systems applied in those conduits.

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