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In the present study, changes in the surface chemistry of enargite in contact with cultures of an Astolerant strain of Acidithiobacillus ferrooxidans was investigated using X-ray photoelectron spectroscopy (XPS).
The oxidation states of As in the enargite sample were analyzed by X-ray absorption near-edge structure (XANES).

Li Geotechnical and Structure Research Center, Shandong University, Jinan, 250061, P.R.China lishucai@sdu.edu.cn,pcwli@163.com,qiangyongz@sdu.edu.cn,liyong9929111@163.com Keywords: geo-mechanics; model tests; similar material; similar theory; experiment research Abstract.
Table 2 Mechanical parameters range of IBSCM Mechanical parameters γ(kg/m-3) µ E(MPa) cσ (MPa) tσ (Mpa) C (KPa) ϕ(°) Range 2.3~3.0 0.2~0.26 60~1400 0.3~4.0 0.028~0.42 20~100 27~40 In conclusion, the new similar material IBSCM has many advantages:(1)high density, low intensity and low elastic module E(2)stable performance, not rusting and high insulation(3) purchase easily and low price(4) adjusting mechanics parameters easily(5)easy to dry, accelerate experiment process(6)innocuity(7)easy to cut(8)easy to joint when material's surface sprayed by alcohol(9)having no chemistry reaction and can be recycle, hence reducing experiment cost.

Synthesis of Nanocrystalline TiC1-xNx by high Energy Milling Jianfeng Zhua, Lan Ye, Hai Tong and Fen Wang Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China azhujf@sust.edu.cn Keywords: TiC1-xNx; Nanocrystalline; High Energy Milling; Mechanism.
The caculation of the crystal lattice showed that the obtained samples have less N than the targeted composition, and this deviation of the final crystal structure from the theoretical composition was mostly attributed to the low pressure of the nitrogen in milling process.

Bioinspired growth of hydroxyapatite nanocrystals on PLGA- (PEG- ASP)n scaffolds modified with oligopeptide derived from BMP-2 Yuan Quan1 , Guo Xiaodong 2＊, Zheng Qixin3 , Zhao ming 4 , Pan Zhengqi5 , Chen Shunguang6 , Quan Daping7 1,2,3 Dept. of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022,China 4 Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China 1 yuanquan1222@yahoo.com.cn, 2*gxdwh@yahoo.com.cn, 3 gkzqx@yahoo.com.cn, 4 yuanzidan03@163.com, 5 pzqunion@yahoo.com.cn, 6anolds@126.com, 7 cesqdp@mail.sysu.edu.cn Keywords: Biomimetic materials; bone tissue engineering; biomineralization; Bone morphogenetic protein 2, peptide Abstract.
Note the presence of Ca, P on the surface, Ca/P=1.60 Discussion and Conclusion Natural bone is a complex biomineralized system with an intricate hierarchical structure.

Fig. 1 Geometry of the extrusion die used In-situ Formation of Poly(ethylene naphthalate) microfibres in Polyethylene and Polypropylene During Extrusion Ka Lok Leung1 , Allan Easteal2 and Debes Bhattacharyya3 1, 2 Centre for Advanced Composite Materials, Department of Chemistry 3 Centre for Advanced Composite Materials, Department of Mechanical Engineering CACM Engineering & Science, Blg 740, Tamaki Campus, Morrin Road, Glen Innes, Auckland, New Zealand 1 kleu046@ec.auckland.ac.nz, 2 a.easteal@auckland.ac.nz, 3 d.bhattacharyya@auckland.ac.nz Keywords: Microfibril, microfibrillization, in-situ fibre formation Abstract.
The subsequent isotropization process results in a composite structure in which the matrix melts and returns to an isotropic state while the highly oriented microfibrils are preserved [1-4].

Synthesis and Property of a New Photochromic Diarylethene Bearing Thiophene and a Six-membered Aryl Unit Hongliang Liu, Shouzhi Pu, Hui Li, Gang Liu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R.China pushouzhi@tsinghua.org.cn Keywords: Diarylethene; Photochromism; Fluorescence; Synthesis Abstract.
The structure of 1a was characterized by 1H NMR spectroscopy. 1H NMR (400 MHz, CDCl3): δ 2.41 (s, 3H, -CH3), 2.35 (s, 3H, -CH3), 6.91 (s, 1H, thiophene-H), 7.07-7.18 (m, 3H, Ar-H), 7.19-7.20 (m, 2H, Ar-H), 7.36-7.40 (m, 3H, Ar-H).

Effect of TiO2 addition on the microstructures and mechanical properties of γ-TiAl intermetallics Jianfeng Zhu a, Wenwen Yang, and Jiangjing Wang Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, China a zhujf@sust.edu.cn, b yangwenwen0909@yahoo.com, c 277524931@qq.com Keywords: TiAl, Al2O3, microstructure, mechanical properties Abstract.
It is clear that the structure of the TiO2 free sample is very coarse.

A New Method of Producing High Purity 4A-Molecular Sieve from High Modulus Sodium Silicate Liquor Purified by Carbonization Bai Guang-hui1,a, Xu Peng 1,b, Teng Wei2,c and Wang Xiang-gang2,d 1 School of Science, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 Department of Chemistry, Fudan University, Shanghai 200433, China a netday@gmail.com,b xupeng_hit@163.com,ctenwei333.student@sina.com,d xgw@163.com Keywords: 4A-molecular sieve; Coal fly ash; Carbonization Abstract.
Introduction 4A-molecular sieve is a crystalline aluminosilicate product with characteristics of large specific area, high hydrothermal stability, and well-distributed rich pore structure [1].

Organic-Inorganic Nano Composite Membranes of Sulfonated Poly(ether sulfone-ketone) Copolymer and SiO2 for Fuel Cell Application Dong-Hoon Lee1,a , Hye-Suk Park1,b , Dong-Wan Seo 1,c , Whan-Gi Kim 1,d 1 Department. of Applied Chemistry Konkuk University 322 Danwol, chungbuk 380-701, Korea a merits928@naver.com, b dong-wani@hanmail.net, chs7394@hanmail.net, dwgkim@kku.ac.kr Keywords: polymer electrolyte membrane fuel cells, SiO2, nano composite Abstract.Novel bisphenol-based wholly aromatic sulfonated poly(ether sulfone-ketone) copolymer and organic-inorganic composite membranes were prepared for operation 80°C in polymer electrolyte membrane fuel cell (PEMFCs).
The polymer structure was confirmed by FT-IR, 1HNMR spectroscopic studies.

Introduction Superplastic forming/diffusion bonding (SPF/DB) technology can be manufactured thin wall structure and effectively used in manufacturing complex shape parts especially in aerospace such as spacecraft wall panel, hatchdoor, guide missile shell, cowl, wing beam and engine blade and so on.
Chuang: Materials Chemistry and Physics, Vol. 195-206 (1999)