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Activated carbons are carbons which generally have a high surface area and complex pore structure resulting from physical or chemical activation processes.
Materials and Structures.
Chemistry and Industry of Forest Products, Vol. 43 (1998), p.59.In Chinese

Optimization of removal conditions of soluble reactive dyes from aqueous solutions by Bacillus sp. biomass Gaixia Fang1,a,Lihua Chen2 1 Department of Bioengineering, Henan University of Urban Construction, Pingdingshan , Henan, 467001, P.R.China 2 School of Chemistry and Chemical Engineering, Pingdingshan University, Pingdingshan , Henan, 467001, P.R.China amyanliao@163.com Keywords: Bacillus sp.
The chemical structure of two dyes was presented in Fig. 1.
The chemical structure of two dyes.

The ultimate goal is to define the chemistry required to form (U,Ce)O2 ceramic microspheres.
This modification will reduce the damage evident in the cermet microspheres (Fig. 5) by processing the cermet using the malleable β-Zr (cubic structure) instead of the rigid α-Zr (hexagonal structure).

Rice husk is insoluble in water, has good chemical stability, high mechanical strength and possesses a granular structure, making it a good adsorbent material for treating heavy metals from wastewater.
The partly carbonized rice husks were mainly microporous with narrow pore size distribution because of the evolution of volatiles and the decomposition of organic matter during carbonization, thus leaving a highly microporous structure[18].Raw rice husks were compact and free pores.
Barakat:Arabian Journal of Chemistry (in press) [7] Waleska E.

Chemistry method includes the hydrate composition method and ion-exchange.
Compared with TVC, MVC system does not require high pressure steam generators, the structure is more compact.
TVC is driven by using high-pressure steam secondary steam ejector steam ejector, achieve the purpose of low pressure steam to reuse , due to TVC has no moving parts, simple structure, stable running, its rapid development.

Stability of Created Nano-holes From Electrodeposited Organic SAMs (Thiols) on Gold Polycrystalline Films Mokhtar Zabat1,a, Mario Morin2,b 1 Physics Department, M’Hamed Bougara University, Boumerdes, Algeria 2 Chemistry Department, UQAM University, Montreal, Canada aemail: m_zabat@yahoo.com, bemail: morin.mario@uqam.ca Key words: Electro-deposition, SAMs, mass transfer, nano-holes stability, permeability, EIS, AFM Abstract.
For small chains like C4 and C6, no stable structure of the perforated layers was reached; layers were continuously deteriorating as seen from the decrease of the resistance to mass transfer measured by EIS (Fig.3.a).
Circuits consisting of a charge transfer resistance through the thiol SAM in parallel with an ideal capacitor provide a good description of the structure, with ultra low leaks in such synthesized SAMs.

Solid-state photocycloaddition reactions of tri-2-pyrones with benzophenone Weidong Wang 1,a, Tetsuro Shimo 2,b 1 College Chemical and Materials Engineering, Jilin Institute of Chemical Technology, Chengde street 45, JiLin City 132022, China 2 Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University, Korimoto 1-21-40, Kagoshima 890-0065, Japan awangweidong1968@hotmail.com, bshimo@apc.kagoshima-u.ac.jp, Keywords: Solid-State, Photocycloaddition Reactions, Tri-2-Pyrones, Benzophenone, [2+2] Cycloadducts Abstract.
Unfortunately, since it was difficult to obtain a single crystal of 1:3 mixed crystal of 1 with 2 and the photo-product, the structure-reactivity correlation studies could not be undertaken in this system.
The packing pattern between 1a and 2 in the solid state was estimated as shown in Fig. 1 from the result of X-Ray crystal structure of the [2+2] cycloadduct of reaction between 6, 6'-dimethyl-4, 4'-polymethylenedioxy-di-2-pyrone (methylene chain n=3) and 2, which have been previously reported [10].

Experimental section Materials and reagents. 3-(cyclopropylmethoxy)-4-(difluoromethoxy)benzaldehyde (impurity A), 3,5-dichloro-4-Amino- acetophenone(impurity B), 4-Difluoromethoxy-3-hydroxybenzaldehyde (impurity C), 3-Cyclo- propymethoxy-4-difluoromethoxy benzoic acid (impurity D), 3-(cyclopropylmethoxy) -N-(3,5-dichloropyridin-N-oxide-4-yl)-4-(difluoromethoxy) benzamide(impurity E)and the sample of roflumilast were prepared at the laboratory of school of chemistry and environmental engineering of Jianghan University and standard roflumilast was purchased from National Institute For Food and Drug Control.
The structures of roflumilast and its related impurities are shown in Fig.1.
Fig. 1 Chemical structure of roflumilast and its related substances (a)3-(cyclopropylmethoxy)-4-(difluoromethoxy)benzaldehyde (impurityA) (b)3,5-dichloro-4-Aminoacetophenone (impurity B) (c) 4-Difluoromethoxy-3-hydroxybenzaldehyde (impurity C) (d) 3-Cyclopropymethoxy-4-difluoromethoxy benzoic acid (impurity D) (e)3-(cyclopropylmethoxy)-N-(3,5-dichloropyridin-N-oxide-4-yl)-4-(difluoromethoxy)benzamide (impurity E) (f)Roflumilast Chromatography conditions.

The crystal structure and phase information were obtained using XRD (D8ADVANCE, Bruker, Germany).
As can be seen in the figures, the layered structures of Al/Ti multilayer films are clear.
Zakar: Journal of Physics and Chemistry of Solids Vol. 71 (2010), p. 84 [9] A.S.

Advanced materials synthesis and microstructural characterization using explosive at Sojo University Seiichiro Ii 1,a, Akio Kira 1,b , Ryuichi Tomoshige2,c and Masahiro Fujita 1,d 1 Department of Mechanical Engineering, Faculty of Engineering, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan 2 Department of Applied Chemistry, Faculty of Engineering, Sojo University a s_ii@mec.sojo-u.ac.jp, bkira@mec.sojo-u.ac.jp, ctomosige@chem.sojo-u.ac.jp, d fujita@mec.sojo-u.ac.jp Keywords: high shock pressure, metal jet, hot dynamic compaction, transmission electron microscopy, energy dispersed x-ray spectroscopy Abstract In the research center for advances in impact engineering established in Sojo university, advanced materials have been synthesized by using shock wave and their microstructure has been investigated.
CTEM and HRTEM observations have revealed not only microstructure but also atomic structure of them.
In addition, TEM and HRTEM observations revealed not only micro- and atomic structures of them but also elemental distribution in the advanced materials.