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Online since: June 2007
Authors: Young Mi Kim, Ik Jin Kim, Seok Ju Lee
Introduction Nearly perfect crystalline zeolite structures are very important for a variety of studies, such as a fundamental understanding for the crystal structure, which could be used as micro reactor for model reaction, chemical sensor and host materials for semiconductor clusters from 1 to 20 nm in diameter to create electronic and optical properties specific to the form of nanocrystals [1,2].
Breck, Zeolite Molecular Sieves: Structure, Chemistry and Use, Wiley, New York (1974)
Online since: January 2012
Authors: Feng Juan Miao, Bai Rui Tao, Yan Mei Sun, Shu Dong Liu
Factor analysis can simplify construction of system, keep out the relative factors and find out the common factor as new sample to bring about dimension reduction. 3 Wavelet Neural Network Wavelet neural network is feed-forward neural network, its active function is mother function, it has some advantages such as simple structure, rapid convergence speed and alterable precision and so on[3].
As a result, the optimal structure of net was obtained[5], where n= 6, l=0.002.
On the basis of the factor analysis, the dimension of data is reduced, input of network is cut, network structure is simplified, running time is shorter, as shown in table 4.
Factor analysis of the functional properties of rice flours from mutant genotypes, Food Chemistry. 126(2011) 1108-1114
Online since: June 2010
Authors: Wei Xu, Li Fen Hao, Qiu Feng An, Qian Jin Wang
Synthesis of fluoro-containing superhydrophobic cotton fabric with washing resistant property using nano-SiO2 sol-gel method Li-fen HAO 1, a, Qiu-feng AN 1, Wei XU 1, Qian-jin WANG1 Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xian, 710021, P.
It is well known that a superhydrophobic surface whether obtained or not is decided by chemical compositions and geometry micro-structures of the superhydrophobic surfaces [3, 4].
The structure and surface morphology of the cotton fabrics treated with FASP alone and with silica sol and FASP was recorded on scanning electron microscope (SEM) (Hitachi S-570).
Hydrophobicity or wetability of a superhydrophobic solid surface is determined by its chemical compositions and geometry micro-structures [3, 4].
Online since: July 2011
Authors: Somchai Thongtem, Titipun Thongtem, Wonchai Promnopas
Photoemission and energy gap of CdS synthesized by solid state microwave-plasma Wonchai Promnopas1, Titipun Thongtem2,3, Somchai Thongtem1,3,a 1Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 2Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 3Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand aCorresponding author: schthongtem@yahoo.com; sthongtem@hotmail.com Tel. +66 (0)53 941924, Fax. +66 (0)53 943445 Keywords: CdS; Solid state microwave-plasma; Photoemission; Energy gap Abstract.
It has a direct band gap of 2.5 eV for the bulk hexagonal wurtzite structure, and 3.53 eV for bulk cubic zinc blende structure [1-3].
Lattice parameters of CdS were calculated using plane-spacing equation for hexagonal structure and Bragg’s law for diffraction [11].
Online since: September 2003
Authors: Jens Birch, Rositza Yakimova, A. Kakanakova-Georgieva, M. Beshkova, Z. Zakhariev
Yakimova2 1 Institite of General and Inorganic Chemistry, Bulgaria Academy of Sciences, Acad.
The crystalline structure was assessed by a powder diffractometer with Cu-Kα target and the quality of crystal structure was determined using a Philips X'Pert Material Research Diffractometer.
Figure 4 illustrates the structure quality evolution at different growth pressures.
Online since: November 2014
Authors: Tomohiro Uchino, Yusuke Negishi, Keito Oguma
The alginate chains support these cations by forming an egg-box structure.
Tung, Calcium phosphates: structure, composition, solubility, and stability, in: Z.
Elliiot, Structure and chemistry of the apatites and other calcium orthophosphates, second ed., Elsevior, USA, 2003, pp. 53-62.
Online since: June 2014
Authors: G. Prasad, Arun Anand Prabu
Anand Prabub Centre for Nanomaterials, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632014, INDIA aprasad.th7@gmail.com, banandprabu@vit.ac.in (corresponding author) Keywords: Multi-walled carbon nanotubes; PVDF; Superhydrophobic; XRD; FESEM; Water contact angle (WCA).
In the case of 1 day stirring, we can observe the non-uniform covering of PVDF over CNT surface with the CNT chain structure still clearly visible.
Whereas in the case of 60 days stirring, a flower-like structure with uniform and complete covering of PVDF over CNT is observed.
Bhushan, Mechanically Durable Carbon Nanotube−Composite Hierarchical Structures with Superhydrophobicity, Self-Cleaning, and Low-Drag, ACS Nano, 3 (2009) 4155-4163
Online since: October 2016
Authors: Henryk Duda, Elzbieta Tomaszewicz, Tadeusz Groń, Piotr Urbanowicz, Monika Oboz, Joachim Kusz, Marek Berkowski
Uniwersytecka 4, 40-007 Katowice, Poland 2West Pomeranian University of Technology, Department of Inorganic and Analytical Chemistry, Al.
Introduction Many divalent metal molybdates (AMoO4, A = Ca, Sr, Ba, Cd or Pb) crystallize at ambient conditions in the tetragonal scheelite-type structure: space group I41/a, Z = 4 [1].
Results and discussion X-ray diffraction measurement at 298(1) K of CdMoO4:Dy3+ showed that the compound crystallizes in tetragonal scheelite type structure with the space group I41/a.
Crystal data and structure refinements for the Cd0.9346Dy0.04360.0218MoO4 single crystal.
Online since: September 2013
Authors: Yang Dong Hu, Lian Ying Wu, Yan Zhang
CFD simulation of flow characteristics in liquid-liquid ejectors Yan Zhang1, a, Yangdong Hu1, b and Lianying Wu1, c 1College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, Shandong, 266100, China aouczhangy@126.com, bydhuhd@ouc.edu.cn, cwulianying@ouc.edu.cn Keywords: liquid-liquid ejector, flow field distribution, turbulent dissipation rate, CFD simulation.
Additionally, the nozzle structure as well as the converging angle of the mixing section may affect the mixing ejector performance significantly [4].
In the studies above, it is the variance of local structures of ejectors that causes the internal flow characteristic change, and then leads to the change of ejector performance.
In addition, structured and unstructured grids are used separately, and the concentrated gird densities are made near the wall to capture the complex flow phenomenon.
Online since: September 2014
Authors: Oh Pei Ching, Mason Wong Bak Lung
The effects of the presence of the clay inorganic fillers on the structure of the MMMs were investigated.
Michaelian, Structure and Surface Acidity of Clay Minerals, in: S.
Photochemical synthesis of poly(3-alkylthiophenes) using host microporous matrices of poly(vinylidene fluoride), Polymer Chemistry 3 (2012) 1334-1343
Koros, Non-ideal Effects in Organic-Inorganic Materials for Gas Separation Membranes, Journal of Molecular Structure (2005) 87-98.