This phenomenon may be explained qualitatively by means of free carrier absorption.

这一现象可定性地用自由载流子吸收来解释。

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Using transferrin as a drug carrier can render the absorption of peptide and protein in gastrointestinal tract.

以转铁蛋白作为药物载体，可以使蛋白肽类药物在肠道吸收；

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Then as the carrier, the chitosan microspheres were used to immobilize papain by absorption crosslinking method. The optimum conditions for immobilization were studied.

然后，以壳聚糖微球为载体，用吸附-交联的联合固定化方法制备固定化木瓜蛋白酶，并研究了木瓜蛋白酶的最佳固定化条件。

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