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Nanocrystalline SnO2 thin films were prepared by pulsed laser deposition techniques on clean glass substrates, and the films were then annealed for 30 min from 50 to 550??C with a step of 50??C, respectively. The investigation of X-ray diffraction confirmed that the various SnO2 thin films were consisted of nanoparticles with average grain size in the range of 23.7-28.9 nm. Root-mean-square surface...
Summary form only given. In this paper, the surface wettability and surface structure of poly(tetrafluoroethylene) (PTFE) treated with remote oxygen plasma are studied. The contact angles of the samples are measured and the critical surface tensions (gammac) are determined on the basis of the Zisman's plots. Then the variation of contact angle to water (thetasH2O) and the gammac are as the functions...
There are many of factors affecting the mining geological environment. Traditional valuation is based on qualitative analysis and judgment of specialists. Doing by this, there are different results about the same mining geological environment only because of different experts. In this paper, in view of the characteristic about mining geological environment, the norms relating resource destroy, geological...
The treatment of dormitory and refectory mixed wastewater by a submerged flat membrane bioreactor (MBR) was studied. The A/O MBR system treated wastewater 4 m3/d. The mean removal efficiency of BOD5 and CODCr was more than 95% with the influent concentration of 100~500 mg/L BOD5 and 120-900 mg/L CODCr. It was proved that active carbon treatment reduced effluent chroma effectively. At the steady working...
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