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Introduction The phenomenon of gas-liquid two phase flow in small diameter round tube widespread in power engineering, petrochemical industry, nuclear power field, such as condensers, evaporators and nuclear steam generator.[1-2] The pattern of gas-liquid two phase flow in small round tube has important effect on flow characteristics and the law of heat transfer.[3] Especially, with the rapid development of atomic energy industry, the introduction of large capacity equipment with high parameters, the design of the device structure is becoming more compact.
[J] Journal of Chemistry 26（8）：1068-1074

As steel structures, because of long-term atmospheric exposure, they will be corroded inevitably [1-4], which has a great effect on strength of steel materials.
Beijing: Chemistry Industry Press, 2005: 130-133.

Photochromic Kinetics of a Novel Unsymmetrical Diarylethene Hongjing Jia, Weiwei Geng and Shouzhi Pu* Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi Province, 330013, P.
The structure of compound 1o was characterized by 1H NMR spectroscopy.

The mesoporous structure was found by the TEM images of the nanoparticles.
Experimental Section Materials Tetraethyl orthosilicate (TEOS, 98%), (3-mercaptopropyl) triethoxysilane (MPTES, 98%) and hexadecyl trimethyl ammonium Chloride (CTAC, 97%) were obtained from Aladdin Chemistry, Co.

Results and discussion Fig.1 XRD of synthesized SnO2 crystalline SnO2 nano-crystalline were successfully synthesized using a hydrothermal method by certainly experimental parameters, such as the concentration of SnCl4 solution for 1mol/L, the varied pH value for 11, the process time for 8 days and the process temperature for 200°C, the XRD of synthesized SnO2 nano-crystalline under different pH value is shown in Fig.1, which indicates the SnO2 nano-crystalline both shows the single phase, it lay the base for controlling the single chemistry content to apply for the dye-sensitized solar cells.
Electrodeposition of arborous structure nanocrystalline SnO2 and application in flexible dye-sensitized solar cells[J].

Synthesis of bimodal porous structured TiO2 microsphere with high photocatalytic activity for water treatment, Colloid Surf.
Physical Chemistry: B. 104 (18) (2000) 4387-4396

Otherwise, the Zeta potentials should decrease or increase gradually, instead of appearance of the isoelectric point, which demonstrated that the inner spatial structure of SOPSF species undergone a complicated rearrangement.
[2] Jing Miao, Qinyan Yue, Baoyu Gao: Environmental chemistry Vol. 23 (2004), p.62

Elliott: Structure and chemistry of the apatites and other calcium orthophosphates (Elsevier, Amsterdam 1994) [10] S.

� The surface composition and chemistry of the ABS plastics before and after the pretreatment test in the presence of TiO2 sol were obtained with XPS.
The molecular structure formed on the surface was observed, as well as how the occupancy ratio of carbon to oxygen on the surface changed. 295 290 285 280 275 0 500 1000 1500 2000 2500 Intensity Binding Energy(eV) C-C C-O O-C=O 295 290 285 280 275 0 500 1000 1500 2000 2500 Intensity Binding Energy(eV) C-C C-O O-C=O 295 290 285 280 275 0 500 1000 1500 2000 2500 Intensity Binding Energy(eV) C-C C-O O-C=O 295 290 285 280 275 0 500 1000 1500 2000 2500 Intensity Binding Energy(eV) 295 290 285 280 275 0 500 1000 1500 2000 2500 Intensity Binding Energy(eV) C-C C-O O-C=O (a) (b) Fig. 4 XPS spectra of the ABS plastic (a) before test and (b) after 15 min of irradiation in TiO2 sol.

The lens structure is shown in Fig.2.
Standard DNA sample: pBR322/Hae III Markers (including: 51, 57, 64, 80, 89, 104, 123, 124, 184, 192, 213, 234, 267, 434, 458, 502, 540, 587 bp, TIANGEN Co., Ltd); the inner coating of silica capillary was LPA (linear polyacrylamide) polymerized in our lab; the fluorescence dyes were TO (Thiazole Orange, Sigma-Aldrich Co.); the main chemistry reagents were acrylamide (electrophoresis pure, Sinopharm chemical reagent Co., Ltd), Tris [Tris (hydroxymethyl) aminomethane] (Biotech>99.9%, Amresco Inc.), EDTA (AR, Sinopharm chemical reagent Co., Ltd), Boric acid (ACS>99.9, Sinopharm chemical reagent Co., Ltd).