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Salem2,d 1Helwan University, Faculty of Science, Physics department, Ain Helwan, Cairo, Egypt 2Umm Al-Qura University, University College, Physics Department, Al-Qunfoza, Saudi Arabia Kingdom 3Umm Al-Qura University, University College, Chemistry Department, Al-Qunfoza, Saudi Arabia Kingdom aatawab2001@yahoo.com (Corresponding author), b yasser_el_gendy@yahoo.com, caarashdi@uqu.edu.sa, dsalemar57@yahoo.com Keywords: UHMWPE, Ion Beam, Optical Properties, Hardness, Surface Modifications Abstract.
The number of carbon atoms per conjugation length (N) is correlated to the optical band gap (Eg) and is given by [19]: (3) where (2β) is the band structure energy of a pair of adjacent π sites and β is taken to be 2.9 eV as it is associated with ππ* optical transition in –C=C- structure [25] for a six-membered carbon ring [26].
This increase can be attributed to the change in the structure and in the chemical bond distribution [29].
Phys. and Chemistry of Solids, 73 (2012) 288-295

Graphene, well-known as a single layer-structure material of the sp2 hybridized carbon, has a great property such as high Young’s modulus (∼1100 GPa), high thermal conductivity (∼5000 W−1K−1), carrier mobility (200 000 cm2 V−1s−1) and specific surface area (2630 m2g−1) [3] which is a supreme catalyst support to anchor metal nanoparticles and offers a sensitive catalytic performance.
Raman spectroscopy was used to characterize the structural and electronic properties of graphitic materials, especially for determining ordered and disordered crystal structures of graphene.
The D band is associated with the disorder degree from a breathing k-point phonon of A1g symmetry and G band is assigned to the first-order scattering of the E2g phonons of the sp2 hybridized carbon atoms which is an indicator of the stacking structure.
Zhu, Graphene− metal particle nanocomposites, The Journal of Physical Chemistry C 112(50) (2008) 19841-19845
Zhao, Preparation, characterization and antibacterial properties of silver-modified graphene oxide, Journal of Materials Chemistry 21(10) (2011) 3350-3352

Fig.1 Schematic diagram showing the process flow and the layer structures of the TIPS-PEN thin-film transistor at each step: (a) Si substrate with an oxide layer, (b) with spin-coated PVP, (c) patterned with a PR layer, (d) after FDTS-treatment, (e) with PR removed, (f) with dip-coated TIPS-PEN, (g) with source and drain electrodes vacuum deposited through a shadow mask. 3.
In addition, the crystalline structures became more irregular and slimmer at withdrawal speeds higher than the optimal, which may be attributed to the unmatchable crystal growth velocity and the withdrawal speed.
Saturated field-effect mobility as high as 0.66 cm2/V·s with an on/off ratio up to 4×104 is measured for the patterned films using a top-contact OTFT structure, although the film coverage of the dip-coated film is to be improved. 5.
Journal of Materials Chemistry. 2010,20(1): 36
Journal of Materials Chemistry C. 2013,1(28): 4384

One Step Synthesis of Symmetrical Amino Azine Derivatives Using Hydrazine Hydrate as a Reagent Nurul Hidayaha, Bambang Purwonob* and Harno Dwi Pranowoc Department of Chemistry, Universitas Gadjah Mada, Bulaksumur, 55281 Yogyakarta, Indonesia anurulhdayh@gmail.com, bpurwono.bambang@ugm.ac.id, charnodp@ugm.ac.id Keywords: Azine, hydrazine hydrate, electron-withdrawing group, Pd/C Abstract.
These compounds have been extensively studied for biological activities [1, 2], heterocyclic synthesis [3–5], ligand synthesis on coordination chemistry [6], dyes, and receptor for chemosensor [7].
The results of the structure elucidation can be concluded that the TM compound can be synthesized by the same procedure from different intermediate compounds 3 or 4 or 5 (Fig. 3).
Structure of [{Rh 2 (µ-L)(CO) 3 [P(OC 6 H 4 Bu t -o) 3 ]} 2 ](H 2 L = 1,1′-binaphthalene-2,2′-dithiol), J.
Gandomi-Ravandi, Structure, synthesis and application of azines: a historical perspective, RSC.

The SEM images of SiO2-P support and chemical structure of CMPO and R-BTP are illustrated in Fig.2.
Photos of SiO2-P support and chemical structures of CMPO and R-BTP.
We found that the adsorption behavior and chemical stability of R-BTP depends strongly on the length and structure of alkyl group.
Arai, “An Advanced Partitioning Process for Key Elements Separation from High Level Liquid Waste”, Science China Chemistry, 55 (2012) 1726
Kim, “Challenges to Develop Single-column MA(III) Separation from HLLW Using R-BTP Type Adsorbents”, Science China Chemistry, 55 (2012) 1732

According to [3], tested concrete components must be at least 100 mm thick and must be connected with some structure, smaller test specimens may be tested provided they are firmly supported.
Acknowledgements This paper was realized thanks to the financial support by the Czech Science Foundation: Project P104/12/810”Study of properties of calcium silicate masonry units by non-destructive testing methods and of the European Union's "Operational Programme Research and Development for Innovations", No.CZ.1.05/2.1.00/03.0097, as an activity of the regional Centre AdMaS "Advanced Materials, Structures and Technologies".
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)
[3] CSN EN 12504-2 Testing concrete in structures - Part 2: Non-destructive testing-Determination of rebound number, Czech standard institute, Prague (2002)

Synthesis of Palladium Chloride Impregnated on Al2O3-Pillared Clay for Reduction of Nitrobenzene Piyarat Trikittiwong1,a* and Jedsada Maliwong1,b 1Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Thailand apiyarat.t@sci.kmutnb.ac.th, bjedsada.mw@gmail.com Keywords: Al2O3-pillared clay, Clay catalyst, Reduction of nitrobenzene Abstract Palladium chloride impregnated on Al2O3-pillared clay (Pd/Al-PILC) was synthesized by intercalation of aluminium (III) chloride into clay interlayers and calcined at 500°C for 1 h.
Fig. 1 Structure of bentonite clay [11].
Because it can insert metal compounds into the structure between layers and when calcined will get a stable metal oxide compound and high porosity, which gives the increases surface area and acidity.
The PdCl2 impregnated on Al2O3-pillared clay maintained the layered structure, maintaining also the large basal spacing to 16.98 Å.
Acknowledgments We greatefully thank the department of industrial chemistry, faculty of applied science and science and technology research institute (STRI), KMUTNB, Thailand for the provision of chemicals, laboratory facilities and financial support.

Umirov6,g 1Teacher, Department of Natural Sciences, Karshi State University, Karshi, 730003, Uzbekistan 2Doctor of Chemical Sciences, Department of Natural Sciences, Samarkand State University, 703004, Uzbekistan 3Professor, Doctor of Chemical Sciences, Department of Chemistry, National University of Uzbekistan, 700174, Uzbekistan 4Assosiate Professor of Chemical Science, Department of Natural Sciences, Karshi State University, Karshi, 730003, Uzbekistan 5-6Teacher, Department of Natural Sciences, Karshi State University, Karshi, 730003, Uzbekistan aelyor_170690@inbox.ru, bhabduvali@rambler.ru, cakbarov_Kh@rambler.ru, dinnat.nakhatov@mail.ru, fnjuraqulova@bk.ru, g18021988umirov@gmail.com Keywords: Cucurbit[n]urils, inhibitors, gossypol, mild steel, alkaline media Abstract: This article showed that new mixed inhibitor type of cucurbit[n]urils based corrosion inhibitors with gossypol at the proportion of 50:50 is excellent efficiency for mild steel in in alkaline media containing
It has been proved that, in alkaline media, the film corresponds basically to a double-layer model consisting of an inner magnetite and an outer ferric oxide according to a Fe3O4/ Fe3+ structure [4].
The structure of Cucurbit[6]urils.
The structure of Gossypol. 2.2.2.
[7] Eric Masson, Xiaoxi Ling, Roymon Joseph, Lawrence Kyeremeh-Mensah and Xiaoyong Lu, Cucurbituril chemistry: a tale of supramolecular success, RSC Advances, 2012, 2, 1213–1247

Oxygen Reduction Reaction in Layer-by-Layer Fabricated Cobalt Porphyrin-Based Nanostructures Banjongsak Lamlua1,2, Takahiro Ohyama1 and Yuki Nagao1,* 1School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1290, Japan 2Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan Bangkok 10330, Thailand ynagao@jaist.ac.jp Keywords: Fuel cell, Isocyanate, Layer-by-layer, ORR, Thermal annealing Abstract Metalloporphyrin-based nanostructures were fabricated on a 3-aminopropylmethoxysilane-modified indium tin oxide (ITO) surface.
These processes imply the possibility of controlling the fabrication of macromolecule-based covalent structures on preferred substrates.
Nagao, Progress on highly proton-conductive polymer thin films with organized structure and molecularly oriented structure, Sci.
Blanchard, Applying polymer chemistry to interfaces:  Layer-by-layer and spontaneous growth of covalently bound multilayers, Langmuir 16 (2000) 4655-4661

This multidisciplinary field is relating with materials, devices and other structures with at least one dimension ranging between 1-100 nanometers.
Thus, silica was chosen for coating ZnO nanoparticle surface because of its biocompatibility, stability in water and its rich surface chemistry.
The detected peaks (·) at angles 31.77, 34.42, 36.25, 47.54, 56.60, 62.86, 66.38, 67.96, and 69.10 show wurtzite structure according to the database [ICDD No. 01-075-0576] with the crystal planes of (100), (002), (101), (102), (110), (103), (200), (112), (201), and (202), respectively.
These other peaks are expected to be the reaction products of Zn with silica such as zinc silicate (Zn2SiO4) with a rhombohedral structure (marked with ▼), which also has a direction contiguous with ZnO diffraction that would be difficult to identify the crystallite size.
Zeng: Ultrasonic Chemistry, 17 (2010) p. 193