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Online since: January 2019
Authors: Weerasak Chomkitichai, Pongthep Jansanthea
X-ray diffraction (XRD) results indicated that phase structures of all samples TiO2 were the mixture of anatase and rutile phases.
The Au nanoparticles are one of the most popular structures because of improvement in the photocatalytic efficiency of the catalyst [12-15].
The lattice fringes of TiO2, matching with d-spacing of TiO2, was measured and identified as the crystal structure of TiO2.
The XRD results confirmed Au and TiO2 (anatase and rutile phases) structures.
Acknowledgements This research supported by the National Research Council of Thailand (NRCT) and the Department of Chemistry, Faculty of Science and Technology, Uttaradit Rajabhat University, Uttaradit, Thailand.
Online since: December 2012
Authors: Peng Chang Ma, Hong Bo Liu
Structure-Property Correlation of Composites Impregnated with Aspartimide Oligomer Pengchang Ma1, a, Hongbo Liu2, b 1Department of Chemical Engineering, Zhongshan Polytechnic, Zhongshan 528404, People’s Republic of China 2School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen 518055, People’s Republic of China asmag_2008@yahoo.com, blhb206@163.com Keywords: aspartimide oligomer, composite, crosslink density, dynamic property Abstract.
Carbon fiber and glass fiber composites impregnated with aspartimide oligomer were fabricated and their structure-property correlation was studied.
As a matter of fact, BMI molecule is highly reactive, making many modification methods on the molecular structure possible.
By comparing thermal, mechanical and dynamic properties of composites derived from aspartimide oligimer with different repeat units, structure-property relationship was revealed between general properties of final composite and structure of aspartimide oligomer.
Online since: June 2010
Authors: Li Ying Guo, Mu Zhang
Cellulose, hemi-cellulose and lignin are the main components of wood powder which build a 3-dimensional network structure [9].
Ionic liquids were synthesized from imidazole and allyl chloride (or chloroethanol), and their chemical structures were confirmed by FTIR and 1HNMR.
The chemical structures of the ionic liquids were shown in Scheme 1.
These photos (Fig. 2) showed that wood powder has a porous three-dimensional network structure.
Leitner: Chemistry Communication Vol. 35 (2006), p. 3681 [5] X.B.
Online since: May 2006
Authors: Robert N. Mead, Gavin Mountjoy
Molecular Dynamics Modelling of the Structure of Bioactive (Ca0)0.3(SiO2)0.7 Sol-gel R.N.
Although MD cannot simulate the sol-gel method because the timescales are too long, it does produce an energy-minimised atomic structure which is representative of the structure of a sol-gel after heat treatment.
These potentials were evaluated and found to be accurate by modelling known crystal structures.
The atomic structure consists of a network of SiO4 tetrahedra with average connectivity of approximately 3.
Perry: Chemistry of Advanced Materials (ed.
Online since: March 2013
Authors: Darshan Habale, R.K. Shivade, Mahadev R. Sonawane, Balasaheb J. Nagare
Their ground state structures are shown in figure 1.
Fig 1: Ground state structures of CNT and Si-CNT along with band structure and density of state respectively.
Fig 2: Ground state structures of O2 molecule adsorbed on CNT and Si-CNT along with band structure and density of state respectively.
Quantum Chemistry. 108 (2008) 203-209
Delley, Modern Density Functional Theory; A tool for Chemistry, 1995
Online since: April 2014
Authors: Yan Pi, Hua Liu, Dun Jia Wang
A fluorescence quenching Study for the interaction of 2,6-bis(5-(p-methylphenyl)-1-H-pyrazol-3-yl)pridine with Zn2+ ion Yan Pia, Hua Liub, Dun-Jia Wang*c Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China apy20091212@163.com, b407568495@qq.com, cdunjiawang@163.com (Corresponding author) Keywords: 2,6-bis(5-(p-methylphenyl)-1-H-pyrazol-3-yl)pridine, bispyrazole, fluorescence quenc- hing, thermodynamic parameter Abstract.
The synthesis of a novel bispyrazole derivative 2,6-bis(5-(p-methylphenyl)-1-H-pyrazol -3-yl)pridine (BMPP) was described and its structure was conforrmed by 1H NMR, FTIR, MS techniques and elemental analysis.
Mohd, A.A.P Khan: Chinese Journal of Chemistry Vol.27 (2009), p.1755
Online since: June 2017
Authors: Rapeephun Dangtungee, Sompatsorn Wongwilatnurak, Surakit Tuampoemsab
This work was an attempt to apply the solid natural rubber (NR) for producing the prototype of geocell with reinforcing the pavement structure of the road.
The preliminary results in this research will lead to defining the optimal chemical formula, designing and producing the prototype of geocell from NR for applying to the pavement structure of flexible pavement.
However, the image 40/20 silica/CB ratio is not clear because the high amount of silica, which CB is a conductive material (depend on the structure) is obvious than high amount silica.
Rodgers, Rubber compounding chemistry and applications, New York, Marcel Dekker, Inc., 2004
Wisojodharmo, Influene of carbon black and silica filler on the rheological and mechanical properties of natural rubber compound, Proceedia Chemistry. 16 (2015) 258-264
Online since: May 2020
Authors: Lina Kieush, Volodymyr Bochka, Artem Sova, Oleksandr Hryshyn, Alisa Dvoiehlazova
This paper reveals that obtaining high-quality sinter, improved or stabilized by its size and strength, is a challenge to be solved by embracing both the formation of sinter with the strong structure and the optimal mineralogical composition of its bonds during the preparation of the sintering blend.
Lu [12] proves the significant influence of the granulation efficiency, nucleus stability, the primary sinter melt volume and properties of iron ore on the sinter structure and quality.
Regarding the above mentioned, the study is currently being focused on the physical and chemical regularities for producing the sinter with a given structure at the stages when the blend for the sinter is prepared.
The content of CaO and SiO2 was changed in the initial blend via the software HSC Chemistry 5.11.
Iron ore sinter production with the block-cellular structure.
Online since: March 2017
Authors: Iva Pospíšilová, Dalibor Vojtěch, Věra Soukupová
Influence of Calcium on the Structure and Mechanical Properties of Biodegradable Zinc Alloys Iva Pospíšilová1, a *, Věra Soukupová1, b and Dalibor Vojtěch1, c 1Department of Metals an Corrosion Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6 apospisii@vscht.cz, bVera.Soukupová@seznam.cz, cDalibor.Vojtech@vscht.cz Keywords: zinc, calcium, biodegradable alloy.
A graphite rod was used to achieve homogeneous structure of the final alloy.
The structure contains primarily a-Zn phase (light areas) and a-Zn +Mg2Zn11 eutectic (dark areas).
Contrary to the Zn-1.5Mg alloy, the structure contains one new phase - CaZn11 that is visible as darker grey areas and it is also illustrated on the EDS elemental map (Fig 2.).
Ruml, Structure, mechanical properties and in vitro degradation, cytotoxicity, genotoxicity of novel biodegradable Zn-Mg alloys, Materials Science and Engineering C 58 (2016) 24-35
Online since: August 2009
Authors: Ping Yang, Qi Yi Wang, Ju Huang, Jun Liang, Nan Huang, Hong Sun
The structure and chemical composition of films were characterized by X-ray photoelectron spectrometry (XPS), and their physical chemistry property was characterized by contact angle measurements.
The hemocompatibility of films was optimized by adjusting the N/O ratio in the same bonding structure.
The composition and bonding structure of films after argon sputter cleaning for 2 min were determined by XPS under a monochromatic Al Kα (1486.7 eV) X-ray irradiation.
The same bonding structure was found in S2.
Moreover, the higher ratio of N/O in the same bonding structure corresponded to the better hemocompatibility, which was related to the interaction between samples and plasma proteins.