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Lineu Prestes, 2242, ZIP 05508-000, São Paulo, Brazil 2 Chemistry Institute, University of São Paulo, IQ/USP, Av.
The structure of Pr12.0FebalCo16.0B6.0Nb0.1 and Pr14.0FebalCo16.0B6.0Nb0.1 powders, prepared from alloys before and after annealing, is shown in Fig. 2 and 3 respectively.
The 2Θ angle variation found for theses alloys (≤0.1o), compared to the same phase with no H in the structure, are consistent with a previous study [9].
[5] CRC Handbook of Chemistry and Physics, 74th Edition (2003), p.6-43

According to the actual assembly structure of main drive shaft and the concentrated mass model,We can get the stress simplified model of the main driving draft as following Fig.2 Main driving axle concentrated mass model According to the formula (1-1), (1-2) and combining with the concentrated mass model of driving draft , each set quality moment of inertia is: , ; , , ; , , ; , According to the formula (1-3), (1-4), (1-5) and Influence coefficient of shaft segment axis moment of inertia, We can get equivalent bending stiffness of various simplified beam and the Ratio of the length of various simplified beam and the equivalent bending stiffness： , ; , , ; , , Where is spiral bevel gears radial force; is spiral bevel gears of axial force, Used to check if they are qualified bearings.Newton's second law and related theory Bearing stiffness is：, 2.
Using transfer matrix method to calculate the relationship between the boundary conditions of the shaft natural frequency and the frequency equation as the list below following: numerical value[Hz] 4582.0626 5166.6504 10469.7248 18956.9704 numerical value[Hz] 45085.4422 80245.2259 163665.6331 251707.8792 numerical value[Hz] 402307.0366 -516677.158 402307.0366 +516677.158 413012.0502 -22815.0626 413012.0502 +22815.0626 The corresponding modes of first 2-order natural frequency for: Fig.3 Simulation analysis of the first order modal Fig.4 Simulation analysis of the second order modal According to the simulation of ANSYS analysis, we can conclude that the natural frequency of the the tool feed system drive shaft results are correct,which combines quality model and the transfer matrix method. 4.Conclusion In modern machinery, it is widespread to use shaft transfer motion and power structure
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Preparation and Antibacterial Activity of Silver Ions-substituted Hydroxyapatite/ Titania Guoyu Lv 1,a, Yubao Li 1,b* , Aiping Yang 1,c, Xiang Zhang 1,d , Weihu Yang 1,e , Jidong Li 1,2,f 1 Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, China 2 Chemistry College, Sichuan University, Chengdu 610064, China a lgyhxy@yahoo.com.cn, b nic7504@scu.edu.cn, cyangaip@yahoo.com.cn, dzzxl-1@163.com, e godsailor@126.com, fblueljd@163.com * Corresponding author Keywords: Silver ions-substituted hydroxyapatite; Antibacterial activity; Titania; Agar disc-diffusion test Abstract: In this paper a series of silver ions-substituted hydroxyapatites (HA) were prepared.
It possesses similar structure to the major mineral constituent of human hard bone and the cation exchange rate of HA is very high with some heavy metals ions such as silver-ions.
Substitution of the Ca 2+ ions by the Ag + ions do not lead to apparent varities on crystalline structures.
A:Chemistry,161(2003)27 4.

Fabrication of Microchannels on SiC Substrate by Femtosecond Laser Yihe Li1, a, Hua Xiao1, b, Gongyi Li1, c, Jian Feng 2, d and Xiaodong Li1, e 1Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, China 2National Key Laboratory of Science and Technology on Advanced Ceramic Fibers and Composites, National University of Defense Technology, Changsha 410073, China ayihenim@gmail.com, bxyhs@126.com, cnudtlgy@gmail.com, cfengj1277@sohu.com, exdli0153@sina.com Keywords: microfluidics, microchannels, SiC substrate, femtosecond laser, fabrication Abstract.
SiC is of great importance in the field of micro structures due to its exceptional physical properties, such as high stiffness, mechanical strength, extreme chemical inertness and wide band gap.
Various microfibricating skills have been developed to make ceramic structures.
Chemistry Review, 2010, 110: 321-343 [5] Y.

The structure was conclusively determined by X-ray diffractrometric analysis.
The structure shows a hetero bicyclic ring system.
The structure and stereochemistry of the crystalline product (L1) was Fig. 1.
Pushpanathan) is thankful to UGC-NRC, School of Chemistry, University of Hyderabad for the instrumentation facility.
Pilati, Polycyclic compounds from aminopolyols and α-dicarbonyls: structure and application in the synthesis of exoditopic ligands, Org.

Theoretical study on the Isomerization Reaction Mechanism of the chain-isomers of N9H9 Shu Zhang1, a, Xiaolan Wang1, b, Wanfei Cai1, c, Laicai Li1, d and Anmin Tian 2, e 1Department of Chemistry, Sichuan Normal University, Chengdu 610066, China 2Department of Chemistry, Sichuan University, Chengdu 610064, China azhangshu1972@126.com b29757739@qq.com c380616723@qq.com dlilcmail@163.com e2374097496@qq.com Keywords: Hydronitrogen Compound, Density Functional Theory (DFT), Relative Stability, Transition State, Isomerization Abstract.
Sixteen species are found, the structures, stabilities, thermochemical properties, and their tautomerism are studied and discussed.
By quantum chemistry methods, one can obtain much information such as geometric configuration, energy, stability, bonding properties, spectroscopic properties, etc.
We have done a series of theoretical studies on hydronitrogen, such as the structures and stabilities of chain-shaped isomers and ring-shaped isomers of N8H8 [20].
The structures, stabilities, thermochemical properties and tautomerism between them are studied and discussed.

Introduction Establishment and study of quantitative interrelations of the form "synthesis-composition-structure-properties" and the stabilization of the surface of base metals are important tasks of modern trends in the physics, chemistry and technology of nanostructures.
Moshnikov, Investigation of nanocomposite magnetic materials based on the oxides of iron, nikel, cobalt and silicon dioxide, Journal of Physics and Chemistry Solids. 74 (2013) 656-663
Syrkov, Sinergetic improvement of aluminium reactivity in the presence on the surface of quaternary ammoniun compounds, Russian Journal of General Chemistry. 83 (2013) 1621-1622

Preparation and Characterization of Cr2O3 Nano-powders by Sol-gel Method Chuncheng Zhu 1, a , Yan Hong1, b, Jianguang Zhang 2, c and Bai-bin Zhou1, d 1 Department of Chemistry, Harbin Normal University, Harbin 150025, China 2 Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China a zhuccshs@yahoo.com.cn, bhy_wyt@yahoo.com.cn, czhangjg@hit.edu.cn, d zhou_bai_bin@sina.com.cn Keywords: Sol-Gel; Nano-powders; Characterization.
Laser induction pyrolytic process, mechano-chemistry, and gas condensation methods were usually used to prepare ultra-fine Cr2O3 powders [2].
Li: Inorganic Chemistry Communications Vol.7 (2004), p. 666 [2] D.W.

3 Modification of solvolytic sol-gel synthesis for low temperature TiO2 DSSC photoelectrode Saran Kalasina1,a , Taweechai Amornsakchai2,b, Udom Asawapirom3,c 1Materials Science and Engineering Program, Faculty of Science, Mahidol University, Phayathai, Bangkok, 10400, Thailand 2Department of Chemistry, Center of Excellence for Innovation in Chemistry and Center for Alternative Energy, Faculty of Science, Mahidol University, Phuttamonthon 4 Road, Salaya, Nakhon Pathom, 73170, Thailand 3National Nanotechnology Center, National Science and Technology Development Agency, Thailand Science Park, Klong Luang, Pathumthani, 12120, Thailand aksaranster@gmail.com, btaweechai.amo@mahidol.ac.th, cudom@nanotec.or.th Keywords: sol-gel method, solvolysis, DSSC, low temperature photoelectrode Abstract.
This reduced cracking is a result of polymeric structure of TiO2 gel which is able to connect between P25 nanopowder via lower shrinkage after drying.
Acknowledgements The authors would like to thanks financial support from the Center for Innovation in Chemistry, Faculty of Science, Mahidol University and the National Science and Technology Development Agency, Thailand.

Pan4* 1 College of Chemistry, Changchun Normal University.
Xi 'an710111 4 Changchun Institute Of Applied Chemistry Chinese Academy Of Sciences.
However, due to the microporous membrane layer and the existence of holes, make it easy to corrosion medium into the matrix, thus ,needing the follow-up processing to make up the defects of the structure.
Sinnebryukhov: ‘Antiscuff Coatings Obtained by Micro-Arc Oxidation Titanium Alloy’, Russian Journal of Applied Chemistry, 2000, 73, 6-9