passive diffusion

Application of Passive diffusion Technology in Environment Air Monitoring

被动扩散技术在环境空气监测中的应用

The nine flavonoids in Caco-2 cell culture model are absorbed through passive diffusion .

9种黄酮类化合物在Caco-2细胞模型上的吸收均为被动扩散。

A sampling method of passive diffusion tube for collecting formaldehyde in indoor air was established .

本文建立了被动式扩散管采集室内空气中甲醛的方法。

Passive diffusion tube for detecting nitrogen dioxide

检测二氧化氮的静态扩散管

Application of Passive Diffusion Tube to Monitor Indoor Air Pollutants of SO_2 and NO_2

应用被动扩散管采样监测室内环境空气中的SO2和NO2

The mechanism of AM-SD absorption may be passive diffusion .

吸收机制为被动扩散。

Results The transport of leuprolide was passive diffusion .

结果游离醋酸亮丙瑞林的转运符合被动扩散的性质。

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

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 uptake and absorption of 9-NC were passive diffusion as the dominating process .

结果9-硝基喜树碱以被动扩散为主要方式被细胞摄取和转运。

For effectively monitoring photochemical pollution from vehicle pollutant emission , a passive diffusion tube was used in large survey .

为监测机动车尾气造成的氧化型光化学烟雾的污染，采用被动扩散管的监测方法在上海布设65个监测点位。

Passive diffusion : In this process , transport across a cell membrane depends on the concentration gradient of the solute .

被动扩散在被动扩散过程中，跨细胞转运依赖于溶质浓度梯度。

Accumulative approach of passive diffusion and resorption of soil pollutants in earworms were summarized .

总结了蚯蚓对土壤污染物进行生物富集的途径：扩散作用和摄食作用；

CONCLUSION The absorption of paeoniflorin in rat ′ s intestine is a first-order process with the passive diffusion mechanism .

结论芍药苷在肠道的吸收呈现一级动力学过程，且吸收机制为被动扩散；

CONCLUSION Puerarin microemulsion is well absorbed at colon , the absorption is a first-order process with the passive diffusion mechanism .

结论葛根素微乳在肠道吸收呈一级动力学过程，吸收机制为被动扩散，葛根素微乳在结肠、回肠吸收较好。

Drugs may enter ventricular CSF directly via the choroid plexus , entering brain tissue by passive diffusion from CSF .

药物可经由脉络丛直接进入侧脑室脑脊液，再经被动扩散由脑脊液进入脑组织。

Their absorption was first-order process besides the passive diffusion mechanism , and facilitated diffusion and active transport may also take part in the transport process .

栀子苷在大鼠小肠的吸收速率随浓度的增加而减小，提示药物的吸收机制除了被动扩散外，可能有主动转运和易化扩散因素；

Conclusions The transport of hydrazine across blood-brain barrier accords with the model of passive diffusion in a membrane - limited rate .

结论肼跨血脑屏障转运属于被动扩散的膜限速模型。

Drugs may cross a biologic barrier by passive diffusion , facilitated passive diffusion , active transport , or pinocytosis .

主动转运或胞饮作用等方式穿越生物屏障。

Decreased blood flow ( eg , in shock ) may lower the concentration gradient across the intestinal mucosa and decrease absorption by passive diffusion .

血流量的减少（休克病人）以降低跨肠粘膜的浓度梯度，从而减少被动扩散吸收。

The results showed that CPZ was well absorbed in the whole intestinal segments , and the mechanism of its intestinal absorption was passive diffusion .

实验结果表明：盐酸氯丙嗪在各肠段的吸收均良好，药物在肠道内的吸收机制为被动扩散。

CONCLUSION : The mechanism of analgin nasal absorption is passive diffusion , following first order kinetics , the absorption rate constant is 0.022 19 min - 1 .

结论：安乃近溶液鼻粘膜吸收机制为被动扩散，吸收符合一级动力学，吸收速度常数K为0.02219min－1。

The detector part is made up of a passive diffusion collecting chamber , high voltage static electricity , semiconductor detector , charge-sensitive preamplifier and forming circuit .

探头部分包括无源扩散氡气体收集室、高压静电收集系统、半导体探测器、电荷灵敏放大器和放大成形电路等；

Passive diffusion monitoring technique is widely used in environment air quality monitoring because its cost is low , and it can also be arranged freely , operated simply and mastered easily .

被动扩散监测技术以其成本低、布点灵活、操作简单，易于掌握等特点在世界各地广泛应用于环境空气质量监测。

The absorption mechanism was passive diffusion and was accorded with First-order kinetics . Verapamil and Tween-80 showed effect on increasing the absorption of paeoniflorin remarkably .

吸收机制为被动扩散，符合一级动力学模式，维拉帕米和吐温-80能促进芍药苷的吸收。

The concentration had no distinctive effect on the absorption kinetics ( P > 0.05 ) . The absorption of NCTD was a first-order process with passive diffusion mechanism .

同一剂型，不同质量浓度药物的大鼠小肠部位的吸收速率之间无显著影响（P>0.05），均符合一级吸收动力学过程；

The passive diffusion technique has been applied widely in western countries for monitoring and research of ambient air quality due to its merits of the low cost , simple operation and high space resolution .

被动扩散技术以其低成本、操作简单、空间覆盖率较高等优点现已在西方发达国家广泛应用于环境空气质量监测及调查研究。

The study of in situ intestinal absorption in rat showed that the absorption mechanism of Ambroxol HCl is passive diffusion without the effect of bile and other excretory products .

结果表明氨溴索在肠道的吸收特点为：肠道各段吸收无明显差别；吸收机制为被动扩散的方式。

Conclusion In comparison with passive diffusion , electroporation and iontophoresis were shown to significantly increase the speed and cumulated amount of the non-ionic drug caffeine passing through the skin .

结论与被动扩散相比，电穿孔和离子导入可显著增加分子型药物咖啡因的经皮渗透速率和累积渗透量。

The reason may be that in fishes , drugs are eliminated mainly through the passive diffusion by renal blood vessels and gills while in mammals , through active transport by kidney .

原因可能是在鱼体内，药物主要通过肾脏血管和腮被动扩散消除，而哺乳动物则主要通过肾脏的主动转运消除。

CONCLUSION The transport of MDG-1 across Caco-2 cell is probably passive diffusion as the dominating process without the P-gp efflux , meanwhile , intact MDG-1 is proved to be absorbed through Caco-2 cell .

结论麦冬多糖MDG-1在Caco-2细胞模型中的转运机制很可能是以被动扩散为主，并且以未降解的药物形式转运，无P-gp外排泵参与。