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Online since: November 2007
Authors: Wilfried Glien, Sabine Begand, Thomas Oberbach, J. Schneider
Schneider2 1Mathys Orthopaedie GmbH, An den Trillers Bueschen 2, 07646 Moersdorf/Germany 2 Bauhaus-University Weimar (Germany), Department of Building Chemistry a sabine.begand@mathysmedical.com, bthomas.oberbach@mathysmedical.com Keywords: zirconia, kinetic, ageing, phase transformation, hydrothermal behaviour Abstract: Alumina and zirconia ceramics have been successfully used as materials for joint endoprostheses.
Like this formation of a homogenous structure with an average grain size of < 0.5 µm could be achieved.
The presence of Al2O3 in the structure has a positive influence on the phase stability resulting in the formation of a highly aging resistant material by the dispersion ZrO2-Al2O3.
Online since: July 2012
Authors: Chi Zhang, Jing Xu, Peng Qu, Jing Wang, Ye Zhou, Hui Min Han
During the polycondensation reaction,the tetrahedral units are alternately linked to yield amorphous geopolymers.Alkali activating solution is important for the dissolving of Si and Al atoms to form geopolymer precursors and finally aluminosilicate material.The most commonly used alkalin activators are NaOH and sodium silicate[3-7] .In the synthesis of geopolymers, NaOH and sodium silicate were found to significantly affect both the compressive strength and structure of geopolymers.The NaOH concentration in the aqueous phase of the geopolymeric system acts on the dissolution process, as well as on the bonding of solid particles in the final structure[8].
Chemistry of geopolymeric systems.
Online since: June 2012
Authors: Jian Zhong Pei, Chang Qing Fang, Shuan Fa Chen, Zeng Ping Zhang
This is attributed to the highly crosslinked network structure.
The only one peak on each curve in Fig.1c provides an evidence of the homogenous structure of the POSS-Ep/CE co-cured system [6].
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)
Online since: May 2011
Authors: Li Wang, Wen Fu, Jun Zuo Huang
Thus it ensures that the entire water system can withstand the stress due to the structure deformation caused by temperature and wind pressure variation, it could also avoid the structural damage caused by severe weather[1].
It can also used on a variety of old and new buildings or structures.
As for the polymer cement waterproof paint, its flexibility at low temperature was affect not only by the microstructure of the formed coating but also by the physical chemistry effects between the cement and the polymer.
Online since: July 2010
Authors: Mineo Sato, Kenji Toda, Kazuyoshi Uematu, Tadashi Ishigaki, Ayano Toda
Morphology control of phosphors synthesized by microwave heating method Ayano Toda1, Kazuyoshi Uematu2, Tadashi Ishigaki1,3, Kenji Toda1,3,a and Mineo Sato2,3 1 Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-nocho, Niigata 950-2181, JAPAN 2 Department of Chemistry and Chemical Engineering, Niigata University, 8050 Ikarashi 2-nocho, Niigata 950-2181, JAPAN 3 Center for Transdisciplinary Research, Niigata University, 8050 Ikarashi2-nocho, Niigata 950-2181, JAPAN a ktoda@eng.niigata-u.ac.jp Keywords: Microwave heating, Phosphor, Red emission Abstract.
Fig. 1 shows the crystal structure of Ba2Gd3Li3Mo8O32 [11].
Fig.1 Crystal structure of Ba2Gd3Li3Mo8O32.
Online since: June 2011
Authors: Wei Ling Lv, Tao Tang, Ling Yang, Rong Lei, Li Jie Qiao, Jun Liu, Jiang Li Cao
Improving the Bonding Strength of Y2O3 Coatings on Steel Substrates through a YOx Adhesion Layer Weiling Lv1, Jun Liu1,Tao Tang2, Ling Yang1, Rong Lei1, Lijie Qiao1, and Jiangli Cao1,a 1Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2Science and Technology on Surface Physics and Chemistry Laboratory, P.O.
The grain size of the coatings changes with the oxygen partial pressure, which is attributed to the effects of the structure of the underlying YOx bonding layer.
The columnar structures are always found in the Y2O3/YOx composite coatings.
Online since: September 2011
Authors: Ming Liu, Gang Liu, Shi Qiang Cui, Cong Bin Fan
Synthesis and Fluorescence Switching of a Photochromic Diarylethene Bearing chlorine Atoms Ming Liu, Gang Liu*, Congbin Fan, Shiqiang Cui Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University Nanchang 330013, P.
The structure of 1a was characterized by 1H NMR.
The structure of 1a was characterized by 1H NMR. 1H NMR (400 MHz, CDCl3, ppm): δ 1.95 (s, 3H, -CH3), 2.52 (s, 3H, -CH3), 6.84-6.86 (s, 2H, thiophene-H), 7.07-7.11(d, 2H, benzene-H), 7.19-7.22(t, 2H, pyridine-H), 7.38 (t, 1H, benzene-H ), 7.48 (S, 1H, benzene-H ), 7.71(S, 1H, pyridine-H ), 8.53(S, 1H, pyridine-H ).
Online since: September 2013
Authors: Hai Zeng Wang, Li Li Mao, Qing Wang
Adsorption of cobalt ions on molded magnesium silicate Lili Maoa, Haizeng Wangb and Qing Wangc School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China amll_79@126.com, bhaizwang@ouc.edu.cn,cqwstudy1016@126.com Keywords: molded Magnesium Silicate, Cobalt Ions, Adsorption.
Surface area and pore structure analysis Nitrogen adsorption/desorption isotherm was presented in Fig. 1.
The images demonstrates the roughness surface and loose internal structure.
Online since: June 2014
Authors: Saksorn Limwichean, Pitak Eiamchai, Kamon Aiempanakit, Thanat Srichaiyaperk, Pongpan Chindaudom, Mati Horprathum, Chanunthorn Chananonnawathorn
X-ray diffractometry were used to examine the crystalline structures of the WO3 samples.
The crystalline structures of the as-deposited and the annealed WO3 thin films were investigated from XRD patterns as shown in Fig.1.
Desai, Growth, structural, electrical and optical properties of the thermally evaporated tungsten trioxide (WO3) thin films, Materials Chemistry and Physics., 114(2009) 475–478.
Online since: November 2016
Authors: Fukue Nagata, Katsuya Kato, Masahiro Tomita, Ryouichi Hikosaka
Effect of the Pore Diameters and Amino-Organo Functional Structures on Mesoporous Silicas for DNA Adsorption Ryouichi Hikosaka1, 2, a, Fukue Nagata2, b, Masahiro Tomita1, c and Katsuya Kato2,d * 1Department of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiyacho, Tsu, Mie 514-8570, Japan 2National Institute of Advanced Industrial Science and Technology, 2266-78, Anagahora, Moriyamaku, Nagoya, Aichi 463-8560, Japan aryouichi-hikosaka@aist.go.jp, bf.nagata@aist.go.jp, ctomita@chem.mie-u.ac.jp, dkatsuya-kato@aist.go.jp Keywords: DNA adsorption, Mesoporous silica, Pore size, Amino chain structure.
All the MPSs displayed type IV curves and H1 or H2 hysteresis loops, which indicates that these MPSs had mesoporous and cylindrical pore structures.
The adsorption models provide a good explanation for the adsorption capacities of DNA on MPSs with different pore sizes and different amino chain structures.
Summary We evaluated DNA adsorption onto the surface of MPSs with different pore sizes (2.4, 5.6, and 11.8 nm) and different amino structures (–2HNH2 and –3NH2).
Thus, controlling the pore size and the structure of the amino functional group on MPS strongly influences its DNA adsorption capacity and adsorption mechanism.