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Online since: May 2016
Authors: Xing Shun Cong, Min Li, Dong Liu, Yue Lun Wang, Ya Dong Zhang, Ran Yu
Preparation and characterization of hierarchical pore molecular sieve with large pore size Min Li1,a, Dong Liu1,b *, Yue-Lun Wang2,c * Ya-Dong Zhang1,d, Ran Yu1,e, and Xing-Shun Cong3,f 1State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, China 2School of Chemical Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China 3Department of Chemistry, Zaozhuang University, Zaozhuang 277160, Shandong, China aemail: zaoyuanlimin@126.com, bemail: ldongupc@vip.sina.com, cemail: wangyuelun2015@163.com, demail: genius_power@163.com, eemail: yuran1264@126.com, femail: cxshouse@sohu.com Keywords: hierarchical porous molecular sieve; catalyst; triblock copolymer; Fischer-Tropsch synthesis Abstract.
Coppens et al.[4] pointed out that hierarchically structured porous supports are of great importance to catalysis because the pore texture at different length scales can be beneficial to reduce the transport limitations of catalyst.
Online since: June 2014
Authors: Mazlina Mustafa Kamal, Afnan Aiman Rohadi, Abdul Razak Rahmat
Owing to that, a significant interaction also can be obtained with rubber posses a similar surface chemistry to silica such as epoxidized natural rubber (ENR) [2].
This is because ENR’s themselves possess a relatively high polarity in their structures and possible to form self-association via hydrogen bonding or polar interactions between either the same or neighbouring molecules, and even self cross-link due to the opening of the oxirane rings [3].
Online since: March 2015
Authors: Fan Nie, Qiu Min Zhang, De Min He, Jun Guan, Xing Duan, Shao Ying Chang, Tao Meng
Parts of the volatiles are not able to escape from the pore structure leading to the decrease of tar yield.
He: Journal of Fuel Chemistry and Technology.
Online since: July 2012
Authors: Xiao Cui Lin, Yan Xiang Wu, Ting Qiu, Zhi Xian Huang
HUANG Zhixian1,a, QIU Ting1, b *, LIN Xiaocui1,c, Wu yanxiang1,d 1 College of Chemistry and Chemical Engineering, Fuzhou University, P.R.China azxhuang@fzu.edu.cn,b tingqiu@fzu.edu.cn, c linxiaocui040322@163.com, d wuyx@fzu.edu.cn To whom correspondence should be addressed.
It could be deferred there existed different structures of polyphenolic in crude extract, that is, 75% acetone extract had the most effective structure of polyphenolic.
Therefore, the Fraction E possessed the most effective structure of polyphenolic and was collected through column chromatography for further study.
So the chemical structure of compound-4 was identified as astragalin.
E.Morris, Structure activity relationships and quantitative structure activity relationships for the flavonoid-mediated inhibition of breast cancer resistance protein, Biochem.
Online since: April 2004
Authors: Darius Milčius, L.L. Pranevičius, R. Knizikevičius, B. Bobrovaitė, Jurgita Nomgaudytė
The characterization of YSZ coating structure was carried out by X-ray diffraction.
The understanding of the processes that drive the formation of homogeneous in composition and structure coating from the initially layered structure at elevated temperature in the presence of the oxygen adsorption is not complete.
The two-layered and multilayered Y/Zr structures were deposited employing a conventional dc magnetron sputtering system with high purity (99.5%) Zr and Y targets 50 mm in diameter.
The surface chemistry is directed to optimize bondings between reacting species and it results in surface diffusion over distances of many atomic bonds.
If dislocation movement, which occurs at the grain boundaries, is prevented the formation of subgrains within the original grain structure takes place.
Online since: October 2020
Authors: Gia Viet Ngo
Leading scientific shipbuilding institutes and design organizations of the Russian Federation have produced and passed operational tests of structures made entirely of polymer composite materials, as well as hybrid structures of ship superstructures and frame structures for the main engine [4].
The modifiers themselves are located in micro-volumes chaotically in the composite, creating local zones with an anisotropic structure.
When processing GI-Brite structures, in addition to fine dust and microparticles of the metal frame, the entire size of chips and dust from destruction by cutting the entire structure is possible.
One of the most important characteristics of any complex system, including CMV, is its structure.
Wirpsza, Polyurethane, chemistry, technology and applications, Ellis Harwood, England, 1993
Online since: July 2012
Authors: D. Nabb, N. Renevier, I. Sherrington, J.K. Luo, W. Shao
The pure Ni coating has a rather regular surface with large grain sizes in the range of 2~4 µm, while the Ni-CNTs nanocomposite coating displays a smooth surface in a nodular structure.
Acknowledgement The authors would like to acknowledge the financial support by Knowledge Transfer Partnership and TSB (KTP007867) and The Knowledge Centre for Materials Chemistry under Grant No. of X00680PR.
Online since: July 2011
Authors: Pisutti Dararutana, Sorapong Pongkrapan, Krit Won-In
refractive index, specific gravity, hardness and thermal expansion of glass samples prepared with various concentration of Bi2O3 Concentration of Bi2O3 (wt %) RI at 589 nm SG at 25°C HV (kgf.mm-2) CoE (100-300°C) x10-7/°C 0 5 10 15 20 25 30 35 40 45 50 55 60 1.510 1.520 1.535 1.555 1.570 1.600 1.625 1.650 1.665 1.690 1.730 1.755 1.785 2.5632 2.7048 2.8450 2.9784 3.1032 3.2468 3.3621 3.4077 3.5752 3.9017 4.4043 4.6154 4.7998 440 445 448 450 453 457 460 465 467 472 476 478 480 132.8 132.5 132.4 132.2 131.5 130.8 130.5 130.3 129.8 129.6 129.4 129.3 129.1 (a) (b) (c) Figure 1 Relationship between properties of glass and concentrations of Bi2O3 (a) refractive index, (b) specific gravity Conclusion Bismuth-bearing glass was fabricated by melting process and structure-property
Paul: Chemistry of Glasses (Chapman and Hall Ltd., U.S.A. 1982)
Online since: January 2013
Authors: Jian Chun Wu
After upload silver or cerium modified the nano-TiO2 ,the modified coating inhibitory effect is significantly improved, and can reach more than 99%. 2.2 Results Analysis Nano-TiO2 is an N-type semiconductor, its electronic structure features of a full valence band and an empty conduction band.
References [1] Wang Yizhong, Fu Yan, Tang Hongxiao: Acta Scientiae Circumstantiae, Vol. 19 (1999), p.142–146 [2] Ren Chengjun, LI Dacheng, ZHONF Benhe, et al:Sichuan Nonferrous Metals, Vol. 4(2004), p.18-21 [3] Lu Ping, YAO Mingming, ZHANG Ying, et al:Photographic Science And Photochemistry, Vol. 30(2002), p.185-189 [4] Sun Xiaoiun , Jing Liviang, Cai Weimi, et al : Journal Of The Chinese Ceramic Society, Vol. 30(2002), p.26-30 [5] Maqi,Zhang Baozhu,Zhang Zhiqiang, et al.: Journal Of Shanxi University Vol.28(2005) p.62~64 [6] Jianjun Yang, Dongxu Li, Zhijun Zhang,et al.: Journal of Photochemistry and Photobiology A: Chemistry, Vol.137(2000) p. 197–202 [7] Dana Dvoranová, Vlasta Brezová, Milan Mazúr, et al.
Online since: February 2018
Authors: Alexey Rodin, Nataliya Goreslavets
Goreslavets1,b 1 Department of Physical Chemistry, NUST MISiS, 4, Leninsky pr-t, Moscow, Russia arodin@misis.ru, bgoreslavets@misis.ru Keywords: diffusion, supersaturation, phase formation Abstract.
Experimental Results Aluminum plates (99,8% purity) were recrystallized at 600 °C for 3 h to obtain the equilibrium structure with large grains (about 1 mm).