The research and development of special admixure PNF of high performance concrete;

The brief introduction is covered with the smectite clay mineral,then covered with the current situation of smectite research,also this text makes simple analysis about developmental situation of the medical auxiliary materials in our country and semctite research both at home and abroad of mineral.

Pharmaceutical excipient is an important part of pharmaceutical preparations because it plays as key role in improving the performance of drug release profile, bioavailability and reducing the side effect.

The experimental researches on the mechanism of action of P-gp inhibitors and pharmaceutical excipients with P-gp inhibition activity were reviewed.

Use the hygroscopicity and the amount of excipients as indexes to choose the optimum prescription.

Strengthening the management of the subsidiary material to tobacco suppliers is a key link for the tobacco manufacturers to fulfill normal produce, participate in competition and explore the market.