被动转运

强调了贝类对溶解态重金属的转运除了被动转运之外，还涉及到需要ATP供能的主动转运过程。

It is highlighted that besides passive transport , dissolved metal transport into bivalves was involved in active transport coupled with ATP .

生物膜的被动转运和离子通道

Passive Transport and Ionic Channels in Biomembranes

HBO提高酶的活性，促进了药物的被动转运；

HBO could enhance the activity of some enzymes , so HBO increase the translation of membrane to MTX .

结果细胞旁转运及跨细胞被动转运的标记物荧光黄和普奈洛尔的表观渗透系数（Papp）值均与文献报道一致；

Results : The apparent permeability coefficients ( Papp ) of Lucifer yellow and propranolol markers of the paracellular and transcellular respectively were all within the range of the reported ones .

结果氧化苦参碱在肠道的吸收呈现一级吸收动力学特征且吸收机制为被动转运。

RESULTS : The absorption mechanism of oxymatrine complied with the passive diffusion and first order kinetics .

一组为被动转运化合物，如阿司匹林，另一组为主动转运化合物，如头孢菌素Ⅵ，此组化合物一般在小肠内通过专门载体主动转运进入循环。

One group was passive transported compounds , such as aspirin . Another group was active transported compounds , such as cephalexin .

结论：氧氟沙星吸收机制为被动转运，在小肠内的吸收呈现吸收一级动力学特征。

CONCLUSION The results indicated that absorption of ofloxacin by intestine is mainly via passive transport mechanism and complied with first order kinetics .

初步推测灯盏花素的吸收差可能是因为其吸收有除简单的被动转运外的其它机制；

The possible reason of the poor oral absorption of breviscapine is due to the other oral absorption mechanism of breviscapine besides the simple passive transportation .

穿透机制包括被动转运、载体介导的转运、受体介导的转运、吸收介导的转运和外排泵活性的抑制。

The mechanisms across the BBB involve the passive diffusion , the carrier mediated transport , the receptor mediated endocytosis , the absorptive mediated endocytosis ( transcytosis ) and the inhibition of drug efflux from the CNS .