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Online since: December 2014
Authors: Li Ning Gao, Hua Xin Chen, Ting Li, Yan Ping Yin
Sasobit is a long-chain aliphatic polyethylene hydrocarbon produced from the Fischer-Tropsch chemical process with a congealing temperature of 102℃ and a melting temperature of 120℃ After dissolved in the asphalt binders, it will reduce the viscosity of asphalt by dilution and lubrication, thus reducing the asphalt mixture’s mixing temperature by 10℃ -30℃ Sasobit will form a stable network structure in the asphalt binders below it’s melting point which can improve the anti-rutting performance of asphalt mixture, so it is a kind of good asphalt modifier in a sense.
After the reaction is finished, methods of 1h NMR and FT-IR are used to validate the molecular structure of grafted product and monomer content (grafting ratio) is determined by means of titration or infrared standard curve method [8]. 2.3 Hydroisomerization Studies had shown that normal alkanes was the non-ideal components of petroleum products, isomerizating distillate alkanes could improve the low temperature performance of products containing wax, so asphalt would be modified by this method becsuse asphalt was a by-product of petroleum.
Progress in Chemistry, 2008, 20 (04), 457-463
Polymer chemistry [M].
After the reaction is finished, methods of 1h NMR and FT-IR are used to validate the molecular structure of grafted product and monomer content (grafting ratio) is determined by means of titration or infrared standard curve method [8]. 2.3 Hydroisomerization Studies had shown that normal alkanes was the non-ideal components of petroleum products, isomerizating distillate alkanes could improve the low temperature performance of products containing wax, so asphalt would be modified by this method becsuse asphalt was a by-product of petroleum.
Progress in Chemistry, 2008, 20 (04), 457-463
Polymer chemistry [M].
Online since: December 2013
Authors: Nurul Jannah Abd Rahman, Mahiran Basri, Salina Mat Radzi, Hanina Mohd Noor
The effect of temperature on enzyme activity can be twofold: reduction of the activation energy by increasing the temperature (Arrhenius’ law) and denaturation of the protein structure by heat [12].
This is probably because beyond a critical temperature, the lipase may have been deactivated due to the vibration and movement of the enzyme molecule which also affected bonding in the lipase structure.
Park: Bioorganic and Medicinal Chemistry Letters Vol. 22 (2012), p. 4159-4162
Lee: Bioorganic and Medicinal Chemistry Letters Vol. 19 (2009), p. 5586-5589
This is probably because beyond a critical temperature, the lipase may have been deactivated due to the vibration and movement of the enzyme molecule which also affected bonding in the lipase structure.
Park: Bioorganic and Medicinal Chemistry Letters Vol. 22 (2012), p. 4159-4162
Lee: Bioorganic and Medicinal Chemistry Letters Vol. 19 (2009), p. 5586-5589
Online since: May 2020
Authors: Jutarat Wangprayot, Nantharat Phruksaphithak
Feasibility of Paper Production from Oil Palm Trunk Using Arrowroot Flour as a Binder
Nantharat Phruksaphithak1,a* and Jutarat Wangprayot1,b
1Department of Chemistry, Faculty of Science, Thaksin University, Phatthalung, Thailand
anantharat@tsu.ac.th, byam14142@gmail.com
Keywords: oil palm trunk, oil palm pulp, paper, arrowroot flour
Abstract.
The OPP structure seemed to be rigid and solid because it was covered by lignin or wax layer material as corresponding with its physical appearance.
On the other hand, after alkaline pretreatment, the SEM showed that the structure of OPP became porous (Fig. 3(B)) due to silica components being disposed [12].
We would also like to thank the Department of Chemistry, Faculty of Science, Thaksin University, Phatthalung campus for chemical suggestions and their great support too.
The OPP structure seemed to be rigid and solid because it was covered by lignin or wax layer material as corresponding with its physical appearance.
On the other hand, after alkaline pretreatment, the SEM showed that the structure of OPP became porous (Fig. 3(B)) due to silica components being disposed [12].
We would also like to thank the Department of Chemistry, Faculty of Science, Thaksin University, Phatthalung campus for chemical suggestions and their great support too.
Online since: August 2016
Authors: Hai Feng Chen, Jia Mei Chen, Hui Zhao
Simple Synthesis and Activities of Visible-light Activities BiVO4 Doped Al via Solid State Method
Chen Haifeng, Chen Jiamei and Zhao Hui
Department of Materials & Chemistry, Huzhou Teachers College, P.
Fig. 2 represented the XRD pattern of Al/BiVO4 samples with different doping mass, where curves a, b, c, d and e were the impact on BiVO4 crystal structure when Al(NO3)3•9H2O was 0 mg, 0.5468 g, 0.6737 g, 0.7216 g, 0.7447 g.
Significant characteristic diffraction peaks of BiVO4 could be observed at 2θ=18.74°, 28.98°, 30.56°, which are identical to the standard cards, it indicates that the photocatalyst samples obtain in this experiment are monoclinic structures.
[5] L Mingce, C Weimin, Z Baoxue, C Xinye, W Yahui, Efficient photocatalytic degradation of phenol over Co3O4/BiVO4 composite under visible light irradiation, Journal of Physical Chemistry B, 110(2006) 20211-20216
Fig. 2 represented the XRD pattern of Al/BiVO4 samples with different doping mass, where curves a, b, c, d and e were the impact on BiVO4 crystal structure when Al(NO3)3•9H2O was 0 mg, 0.5468 g, 0.6737 g, 0.7216 g, 0.7447 g.
Significant characteristic diffraction peaks of BiVO4 could be observed at 2θ=18.74°, 28.98°, 30.56°, which are identical to the standard cards, it indicates that the photocatalyst samples obtain in this experiment are monoclinic structures.
[5] L Mingce, C Weimin, Z Baoxue, C Xinye, W Yahui, Efficient photocatalytic degradation of phenol over Co3O4/BiVO4 composite under visible light irradiation, Journal of Physical Chemistry B, 110(2006) 20211-20216
Online since: December 2014
Authors: Ji Hua Li, Te Li, Fei Wang, Long Zheng, Yong Sheng Li
Through TG, XRD and SEM analysis, it was found that the membrane was existed in the form of amorphous structure.
In the sol-gel chemistry, the molecular precursors and reaction conditions primarily determine the properties of glasses.
In the structure of tetraethoxysilane, there were four alkoxys linked to the silicon atom.
Three-dimensional net structure didn’t change because no chemical reaction occurred.
The inside of the membrane were loose and some areas showed layer structure
In the sol-gel chemistry, the molecular precursors and reaction conditions primarily determine the properties of glasses.
In the structure of tetraethoxysilane, there were four alkoxys linked to the silicon atom.
Three-dimensional net structure didn’t change because no chemical reaction occurred.
The inside of the membrane were loose and some areas showed layer structure
Online since: June 2012
Authors: Li Xing Dai, Yan Hua Liu
Improvement of morphology, structure, and thermal properties of electrospun PVA/RSF fiber mats by SiO2
Yanhua Liu 1, a, Lixing Dai 2, b
1,2 College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou, Jiangsu, 215123, China
a email: 20094209146@suda.edu.cn, b email: dailixing@suda.edu.cn
Keywords: electrospinning; morphology; SiO2; poly (vinyl alcohol); regenerated silk fibroin
Abstract.
Different ratios of PVA/RSF fibers were studied for morphology, structure, and thermal properties.
Fourier transform infrared spectroscopy (Nicolet-6700, Thermo Nicolet Co., America) was used to identify the structure of fibers in the spectral region of 4,000-400 cm-1.
Additionally, the absorption peak at about 1240 cm-1 for amide III of RSF disappears, and the characteristic band at about 660 cm-1 for silk I crystals is largely weakened, which indicates that the crystal structure of RSF is decreased.
Additionally, the peak at about 20o shifted about 2o towards larger 2θ which may be caused by a new crystalline structure due to the improved compatibility [4].
Different ratios of PVA/RSF fibers were studied for morphology, structure, and thermal properties.
Fourier transform infrared spectroscopy (Nicolet-6700, Thermo Nicolet Co., America) was used to identify the structure of fibers in the spectral region of 4,000-400 cm-1.
Additionally, the absorption peak at about 1240 cm-1 for amide III of RSF disappears, and the characteristic band at about 660 cm-1 for silk I crystals is largely weakened, which indicates that the crystal structure of RSF is decreased.
Additionally, the peak at about 20o shifted about 2o towards larger 2θ which may be caused by a new crystalline structure due to the improved compatibility [4].
Online since: September 2013
Authors: Ben Wen Li, Jun Rui Shi, Yang Yang, Zhi Jia Xue, Zhi Peng Wu
Diffusion filtration combustion has the characteristics of the small volume, compact structure, large power scope and less emissions[1].
As there are a lot of parameters effecting the structure of flame such as physical properties, pore structure of porous medium and diffusion and dispersion of the gas.
The structure of flame was reconfigurated by using electrical capacitance tomography by Chen Qi[15].
The predicted flame structure and experimental values were very agreement.
Engineering Chemistry (1928) [5] W.
As there are a lot of parameters effecting the structure of flame such as physical properties, pore structure of porous medium and diffusion and dispersion of the gas.
The structure of flame was reconfigurated by using electrical capacitance tomography by Chen Qi[15].
The predicted flame structure and experimental values were very agreement.
Engineering Chemistry (1928) [5] W.
Online since: November 2012
Authors: T. Pataki, I. Zsoldos
The extremely high strength of carbon nanotubes is derived from the graphene structure.
Repetition of the previous two steps until the structure is damaged or breaks. 5.
After the 588th step the structure reached a critical state where some of the bonds exceeded 1.70 Å (see Fig. 7).
The junction (branching) by itself is not a weak spot in the structure.
[9] Jeng Y.R., Tsai P.C., Fang T.H., J. of Phys. and Chemistry of Solids 65:1849-1856, 2004
Repetition of the previous two steps until the structure is damaged or breaks. 5.
After the 588th step the structure reached a critical state where some of the bonds exceeded 1.70 Å (see Fig. 7).
The junction (branching) by itself is not a weak spot in the structure.
[9] Jeng Y.R., Tsai P.C., Fang T.H., J. of Phys. and Chemistry of Solids 65:1849-1856, 2004
Online since: December 2012
Authors: Xiao Fen Yu
That’s the reason why designers keep pursuing the application of new technology, new material and new structure in display design, since it has significant influence in product shape, structure and material as well as indirect and direct impact on the development display design.
In addition, technology could bring borderless creativity, such as the changing, breaking and reforming cubic structure, which can bring numerous combinations to make display designs brilliant.
The technological creativity a challenge to designer’s mind and knowledge, such as creating impossible shape and structure by adopting current existing material.
The rationality of display platform’s material, structure and shape need to be improved by the improvement of manufacture technology.
References [1]Wang he, Display Art, People Press house( 2008.10) [2]Wu Yunxiu, The Unity of Display Design, Literary Debate(2011.4) [3]Liu Huadong, Guo Honglin,Display Design and Production, Chemistry Industry Press House, (2009.09)
In addition, technology could bring borderless creativity, such as the changing, breaking and reforming cubic structure, which can bring numerous combinations to make display designs brilliant.
The technological creativity a challenge to designer’s mind and knowledge, such as creating impossible shape and structure by adopting current existing material.
The rationality of display platform’s material, structure and shape need to be improved by the improvement of manufacture technology.
References [1]Wang he, Display Art, People Press house( 2008.10) [2]Wu Yunxiu, The Unity of Display Design, Literary Debate(2011.4) [3]Liu Huadong, Guo Honglin,Display Design and Production, Chemistry Industry Press House, (2009.09)
Online since: May 2013
Authors: Abdul Amir Hassan Kadhum, Abu Bakar Mohamad, Mohd Sobri Takriff, Muneer M. Ba-Abbad, Kamaruzzaman Sopian, Salmin S. Al-Shamali
TiO2 consists of two main structures anatase and rutile phase which one has specific properties and application.
All peaks indicate that anatase and rutile structure were found only.
The peaks of anatase structure samples at 2θ=25.4o and rutile structure phase (2θ=27.5°) were found according 2θ.
Zeininezhad, The effect of particle size and crystal structure of titanium dioxide nanoparticles on the photocatalytic properties, J.
[14] Paul Kelter, Michael Mosher, Andrew Scott, Chemistry: The Practical Science, Charles Hartford (2009) [15] S.
All peaks indicate that anatase and rutile structure were found only.
The peaks of anatase structure samples at 2θ=25.4o and rutile structure phase (2θ=27.5°) were found according 2θ.
Zeininezhad, The effect of particle size and crystal structure of titanium dioxide nanoparticles on the photocatalytic properties, J.
[14] Paul Kelter, Michael Mosher, Andrew Scott, Chemistry: The Practical Science, Charles Hartford (2009) [15] S.