Search results

Time-series signals of normal velocity component with different flow direction and normal position of the turbulent boundary layer which were disturbed before and after the different frequency period were made elaborate measurement in the wind tunnel with the sampling frequency higher than the correspondent smallest turbulence structure time scale,IFA300 hot-wire anemometer and TSI-1243 double hot-wire senor probe were used in the experiment.
The most fundamental property of the turbulence is the unity of the randomness and orderliness, which is an extremely complex multi-scale nonlinear chaotic system and has the common characteristic and description method with many disciplines such as physics, chemistry, life science and even social science, therefore, the breakthrough in the study of the turbulence will promote the development of many basic disciplines and generate significant leap in the level of awareness of the nature.
Experiment equipment and technology The experiment was carried out in the TULTWT low turbulence wind tunnel, which is DC closed-type with wood structure; it is mainly used in the experimental study of flow stability and turbulence and also could be used in the applicability technology research.
Corresponding Author Gangli Hao, College of Prospecting Techniques and Engineering, Shijiazhuang University of Economics, Shijiazhuang, Hebei,China 050031 e-mail:18027670@qq.com tel:13832307025 Reference [1] Kline S J, Reynolds W C, Schraub F H, Runstadler P W, The structure of turbulent boundary layer [J], J Fluid Mech., 1967, 30: 741-774
[5] The effect of organized wave perturbations on coherent structure in wall turbulence ACTA MECHANICA SINICA, vol.23,No.4, 1991,pp. 47~54 (in Chinese)

The thermal behaviors of these copolyacrylate esters were studied by DSC and POM measurements and phase structures by XRD measurements.
The mesogens showed very good induce effect on the formation of layered structures.
CD measurements were used to determine the helical structure and the optical rotation power of the side chain copolyacrylate esters.
Synthetic routine and chemical structures of side chain copolymers of OLLA segments.
Typically positive cotton effect was found for each polymer indicating the formation of stable helical structure.

Owing to their unique hybrid network structure, gels have both the cohesive properties of solids and the diffusive transport properties of liquids.
An amount of propanetriol was added to produce porous polymer membrane for improving the structure of the membrane. 2.
The membrane produced without propanetriol displays compact structure with some cracks, while the membrane assisted by propanetriol shows porous structure.
Photobiol., A: Chemistry, 164 (2004) 209
De Paoli,Coordination Chemistry Reviews 248 (2004) 1455 [15] D-W.

As a clay surface polarity of silica bonding structure [7], which make the clay surface hydrophilic, is incompatible with hydrophobic polymer.
In Figures 1 show the peas, which are characterized as a layered structure and corresponded to the basal spacing with the higher reflection order.
The characteristic peaks of basal spacing for CL120-PI/BEN and CL120-BEN completely disappear, indicating the possibility for exfoliation of the modified-clay interlayer structures in the UP matrix.
The morphology of the MMT/UP nanocomposites are dependent upon the structure of the clay; in the case of MMT, an island-type exfoliated and intercalated morphologies is obtained.
H.Solomon, D.G.Eds Hawthorne, Chemistry of pigments and Fillers, John Wiley＆Sons, 1983, New York

Preparation and Characterization of Al2O3-B4C Coated Composite Powder by Hydrothermal Method Fang Wang1, Ruihua Wang1, Minhan Xu1, Xiaobo Bai1, Aixia Chen1a, Daming Du1, Shibin Li1, Jieguang Song2b, Lin Chen3c 1School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China 2Key Laboratory for Industrial Ceramics of Jiangxi Province, School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China 3School of Materials and Chemistry Engineering, Pingxiang University, Pingxiang 337055 China a304542351@qq.com, bsjg825@163.com, crymw27@163.com Keywords: Metallic ceramic materials; hydrothermal method; alumina; composite powder.
Through the optimization of hydrothermal synthesis concentration, a composite of Al2O3/B4C composite with good nano-encapsulated structure was obtained.
Too high a sintering temperature will cause the structure to become larger, the degree of densification is lower, and the defects are more.
Through the optimization of hydrothermal synthesis concentration, a composite of alumina/carburous boron composite with good nano-encapsulated structure was obtained.
Chen, Structure and mechanical properties of boron-rich boron carbides, J.

They also theoretically calculated the band structure of the nitrogen-doped TiO2 and concluded that the nitrogen atoms which substituted the oxygen sites were responsible for the visible light sensitivity.
The first one located at 360-400nm should be corresponding to the original structure of anatase or rutile.
Chung, Characterization of a TiO2 photocatalyst synthesized by the solvothermal method and its catalytic performance for CHCl3 decomposition, Journal of Photochemistry and Photobiology A: Chemistry, 144 (2001) 185-191
[10] S.Yin, T.Sato, Photocatalytic activity of platinum loaded fibrous titania prepared by solvothermal process, Journal of Photochemistry and Photobiology A: Chemistry, 169 (2005) 89-94

Formulation of Nanostructured Lipid Carriers Loaded with Algae Extract: A Detailed Study of Preparation and Evaluation of Antioxidant Potential for Stabilization of Fish Oil Thitiphan Chimsook1,a 1Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, Thailand, 50290 athitiphan.cs@gmail.com Keywords: Antioxidant, Nanostructured lipid carriers, Fish oil.
This observation confirms a less ordered crystalline structure of the lipid phase, knowing that an ordered structure is characteristic for elongated crystals [11,12].
Acknowledgement We are thankful to The Thailand Research Fund, National Research Council of Thailand, Department of Chemistry, Faculty of Science, Maejo University for financial support and providing all necessary facilities to conduct the experiments.

In addition to the mixed electronic-ionic conductivity property of LaCo1-xFexO3, the catalytic performance in terms of activity and stability and magnetic characteristics have also been studied and they focus on crystalline structures, solid solution formation and synthesis techniques of preparing a correct stoichiometric phase [2-5].
Enough urea was used for each composition, according to the chemistry of propellants [7], during the combustion, the released energy would be enough for the reaction occurrence.
Industrial & Engineering Chemistry Research, 2004, 43, 5670-5680
Crystal structure and magnetic ordering of the LaCo1-xFexO3 system.

Corrosion Inhibition of Mild Steel by Benzotriazoliumionic Liquid in Hydrochloric Acid Hong-Mei Wang 1, 2, a, Ke-Long Huang 2, b，Zhi-Ping Zhu 1, c 1 Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, P.
China 2 School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P.
It has been observed that adsorption depends mainly on certain physicochemical properties of the inhibitor group, such as electron density at the donor atom,π-orbital character, and the electronic structure of the molecule.
The product was a clear slightly yellow liquid.The chemical structure of was checked by IR (KBr pellet) (Aratar-360，American) and 1H NMR (500 MHz, CDCl3) (Avance300, Bruker).

The rates and extents of weathering are recorded in the concentrations of atmospheric gases in hydrologic responses and soil chemistry, which can be inferred from historical data and the geologic record (Fig.1)[2].
• What controls the thickness, structure and heterogeneity of the Critical Zone?
It will be necessary to 1) develop tools to access the CZ from the surface down into bedrock; 2) apply geophysical methods to profile regolith depths and structures; and 3) develop isotopic techniques to trace nutrient cycling and distinguish lithogenic versus biogenic sources [6].
For the questions related to Question 2, the principal obstacle is the notable absence of established interdisciplinary research programs, which includes the need to interface surface chemistry with microbiology at the molecular to particle scale, also need to develop a conceptual framework for describing material mixing and transport in porous media from the molecules and microbes to hill-slopes, catchments and entire regions.