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Chitosan (Poly[-(1, 4)-2-amino-2-deoxy-D-glucopiranose]) has a structure as shown in fig.1.Poly(methyl methacrylate) (PMMA) is a polymer with an amorphous structure.
Fig.1 Chemical structure of Chitosan Materials and Instruments Chitosan ( MW of 45 kDa and 95% degree of deacetylation) was got form Sigma–Aldrich Co., Ltd.
Tert-butylhydroperoxide (TBHP), methyl methacrylate (MMA) ,sodium hydroxide and acetic acid were obtained from Aladdin Chemistry Co., Ltd.
,Domb, A.J., Chitosan chemistry and pharmaceutical perspectives, Chem.Rev.2004,104, 6017-6084

The pores of AAO films are orderless just like sponge, the inset in Fig.1a shows the high magnification image of top view of AAO films without annealing of aluminium sheets, while the pores of AAO templates are uniform and regularity with hexagonal honeycomb structure, the inset in Fig.1b is the high magnification image of the corresponding AAO templates.
This is crucial to keep mechanical balance of AAO nanopores, resulting in the hexagonal honeycomb structure.
These pores are prone to form hexagonal honeycomb structure to keep mechanical balance.
Chemistry Vol. 100(1996), p. 14037 [2] D.
Phillipp: Applied Physics Letters Vol. 76(2000), p. 2011 [6] X.Y.Zhang, L.D.Zhang, Y.Lei, L.X.Zhao and Y.Q.Mao: Journal of Materials Chemistry Vol. 11 (2001), p. 1732 [7] Xinyi Zhang, Dan Li, Laure Bourgeois, Huanting Wang and Paul A.

Direct methanol fuel cell, has the advantages of simple system structure, high volume energy density, fuel refreshment convenience, low operating temperature, quick start, etc.
BP Network Structure BP network is a multilayer feed forward network of one-way transmission, and its structure is shown in figure 2.In addition to network input and output node, there is a layer or layers of hidden layer node.
ACKNOWLEDGMENT The work was founded by science and technology innovation talent plan of Henan province and the plan projects of Jinshui district, Zhengzhou city, Henan province, the authors also wish to thank the anonymous reviewers and valuable comments with Xing Wei, Liu Changpeng, and Feng Ligang in Green Chemistry and Process Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences REFERENCES [1]J.

Investigations of Adsorption of 1-dodecyl-3-methyl Imidazolium Chloride on Iron Surface as Corrosion Inhibitor Qi Zhao1, Meishan Pei1, Wenjuan Guo1,2, * and Shengnian Wang3 1School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan, Jinan, Shandong 250022, P.R.
,Ltd of CCCC Fourth Harbor Engineering Co., Ltd Key Laboratory of Durability Technology for Harbour and Marine Structure Communications Ministry, Guang zhou, 510230, P.R.
Its molecular structure is shown in Fig. 1.
Fig. 1 Molecular structure of [C12mim]Cl Experimental Section A 2.0 mm-diameter iron rod (Aldrich 99.999%) was employed to prepare the working electrode.

Orange II has an azo structure in a neutral environment, which is greatly influenced by pH value.
Orange II has a quinoid structure in acid conditions, whereas in an alkaline environment, it changes into an azo one.
The ratio was less than 3% at pH 5.0 or 7.0, the possible reason for which may be that the Orange dye with a quinoid structure was easier to be decolorized than that with an azo one.
Acknowledgements This work was financially supported by Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology.
Zhu: Environmental Chemistry.

Synthesis and Research of Lithium Manganese Titanium Oxide Jinhe Jiang MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China Corresponding author.
In this paper, inorganic ion exchanger (LiMn0.25TiO3) with a spinel structure ion memory was synthesized.
The structure of compound metal oxide LiMn0.25TiO3 crystallized at 800°C was much perfect.
As shown, the structure of LiMnTi-800(H) is nearly constant, which is inverse spinel oxide type too.
Journal of Physics and Chemistry of Solids , 2007, 68: 780-784.

Optoelectronic Properties and Holographic Optical Recording of a Unsymmetrical Diarylethene Having a Pyrrole Unit Gang Liu, Ming Liu, Qing Zhang, Shouzhi Pu*, Weijun Liu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.R.
The photochromic process of diarylethenes is based on a reversible transformation between the open-ring isomer with a hexatriene structure and the closed-ring isomer with a cyclohexadiene structure, according to the Woodward-Hoffmann rule [8].
The structure of compound 1o was confirmed by melting point, IR, 1H NMR and 13C NMR spectroscopy: Melting point 157.3~157.5 °C; Anal.
Irie: Chemistry Letters (2006), p. 1204 [7] H.

Heitjans 1,a 1,2 3 4 ,1,b 1,c 1Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, 30167 Hannover (Germany) wilkening pci.uni-hannover.de, 2 3 4 b c German Institute of Rubber Technology (DIK), Eupener Str. 33, 30519 Hannover (Germany) J.
Spinel-type structured Li4+xTi5O12 (0 6 x 6 3 ) is actually one of the most promising anode materials for Li ion batteries.
Let us note for comparison that ball milled LiNbO3 represents a structurally highly disordered material whereas a nanocrystalline LiNbO3 sample prepared by a sol-gel method shows a high degree of crystallinity as probed by high-resolution transmission electron microscopy (TEM) and extended Xray absorption fine structure (EXAFS) spectroscopy [5].
In fact, in the spinel structure of Li4Ti5O12 the Ti4+ cations are randomly distributed over the 16d positions leading, according to quantum chemical calculations of the EFGs [17], to a large number of electrically different Li sites.
I. acknowledges a grant from the Center of Solid State Chemistry and New Materials established by the State of Lower Saxony at the Leibniz University of Hannover .

Effects of freezing and thawing on the extraction yields of polysaccharides from corn pollen Yumin Bai1,a,Zhenming Che1,b*, Yage Xing1,c, Weiyun Guo2,d, Qinglian Xu3,e and Rao Yu3,f 1,3 Key Laboratory of Food Bio-technology under the supervision of Sichuan Province, School of Bioengineering, Xihua University, Chengdu, 610039, China 2 College of Chemistry and Chemical Engineering, Xuchang University, Xuchang, 461000, China a email: baiyumin88820@yahoo.cn, b*email: chezhenming@163.com(corresponding author), cemail: xingyage1@yahoo.com.cn, demail: bym2822@yahoo.cn, eemail:xiaobai0920@yahoo.cn, femail: bym0920@yahoo.cn Keywords: Corn pollen, Repeated freezing and thawing method, The extraction yields of polysaccharides, Phenol-sulfuric acid assay.
This is probably caused by the complex structure of the walls, which makes them not easily accessible to enzymatic degradation.
This might be due to the damage of the cellular structure of cell wall, which could be susceptible to large ice crystal formed during the freezing process, and the increase of the driving force for the mass transfer of the polysaccharides with increasing the water addition[9,10].
The reason for this was that the structure of the polysaccharides could be destroyed when the thawing temperature was higher than 80°C.
Journal of Biological Chemistry. 50 (1986) 169-175

Fig.2 GB structure of the three samples sintered at 1140ºC (a), 1170 ºC(b) and 1190 ºC (c), respectively.
To understand the chemistry of GB, quantification of Ba, Bi and Sr segregations to GBs was carried out [9].
Local chemistry at GB region was also closely related to the liquid phase, homogenous liquid phase led to equilibrium dopants distributions at GB (in T2).
Table 2 Summary of excess parameters obtained from the quantitative analysis of GB structures Excess at GB (nm-2) Sample Ba Bi Sr T1 10.28±12.99 5.63±4.76 -16.61±27.89 without NP 2.54±1.10 -2.67±0.54 -19.88±9.24 T2 with NP 7.06±6.13 -1.87±1.87 -0.52±6.20 without NP 4.88±8.21 -0.49±2.38 -18.33±12.77 T3 with NP 3.36±12.40 -0.13±4.76 -4.77±18.15 High dielectric constant.
Comparing the microstructures of T1 with T3, which have the similar grain size distribution but quite different grain boundary structures, it is reasonable to conclude that NP at GB are beneficial to the materials' dielectric properties.