Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: November 2013
Authors: Xin Liu, Yuan Sheng Wang, Hong Wei Yu, Zheng Wei
Owing to excellent oil-absorption capacity, rapid oil-absorption rate and oil retention ability of the three-dimensional network structure, Absorbing resin was bound to play an important role in dealing with aspects of marine oil spills .
Because aviation kerosene molecule was big molecule and adding MMA or BA tighten network structure, so aviation kerosene molecules can’t fully enter into the resin and its oil-absorption capacity was limited which lead to significant reduction in the oil-absorption; while being small molecule , xylene can fully enter into the interior of the resin ,and the oil-absorption capacity was fully played.
The kinetics mainly studied the relationship between structure and oil-absorbing rate.
Length of carbon chain, crosslinking density and network structure decided the diffusion resistance in resin, which directly affected the oil-absorbing rate.
Chen: Polymer Chemistry Vol.51(2013), p.1963-1968
Online since: August 2014
Authors: Bing Yu Sun, Yan Guo Shi, Lin Lin Liu
The structure and composition of SPI have been extensively reported because of their being important to the functionalities of SPI in recent years.
The relationship between structure and appearance has been studied by X-ray diffractometer, ultraviolet spectra, circular dichroism spectra[3], Differential Scanning Calorimetry[4], fluorescence spectrometer[5], fourier transform infrared spectroscopy and electrophoresis.
Lakemond et al.in: Heat Denaturation of Soy Glycinin: Influence of pH and Ionic Strength on Molecular Structure(Agric.
In: Study on Structure-Emulsifying Properties Relationship of Yu-25 Soybean 11S Glycinin(China & International Soybean Conference & Exhibition, 2002) [6] Laemmli, U.
(Cereal Chemistry 1993) [8] Zhnang Lu, Xiuzhi Susan Sun.
Online since: May 2013
Authors: Lin Yan Jia, Jun Feng Han, Zhong Bao Shao
Luminescence properties of ZnO:Eu3+ red emitting phosphor prepared by precipitation method Linyan Jia 1, a , Zhongbao Shao 2,b,* , Junfeng Han 1,c 1College of Chemistry and Chemical Engineering, Mudanjiang Normal University, 157011 China 2 College of Sciences, Northeastern University, Shenyang, 110004 China a jialinyan1971@163.com b shaozongbao@126.com c hanjunfeng76@163.com Keywords: Zinc oxide, Phosphor, Precipitation Abstract.
The structure of phosphor powder was characterized by Rigaku D/max-2200 diffractometer type X-ray diffraction (XRD) employing Cu Kα radiation at 40kV and 20mA.
Results and discussion XRD and structure The XRD patterns of obtained ZnO:Eu3+ phosphors by calcining precipitation precursor at 500-800°C for 2 h are shown in Fig.1.
The single phase belonged to the ZnO is observed when the temperature is 600°C, and impurity phase peaks disappear, so the doped Eu3+ ions had little influence on the host structure when Zn2+ ions are replaced by Eu3+ ions.
According to the JCPDS card 36-1451, ZnO:Eu phosphors should have the Cubic crystal structure with space group of P63mc.
Online since: September 2021
Authors: L.V. Antonova, Yulia G. Bogdanova, V.N. Silnikov, M.Yu. Khanova, E.A. Senokosova, L.S. Barbarash
Current methods of vascular tissue engineering are aimed at creating of functional implants that have a structure similar to that of native vascular tissue organization, and are able to provide patency in the long-term postoperative period (7 days after implantation of prostheses and until the end of implantation).
One of the solutions to the problem of antimicrobial protection is the introduction of an antibacterial drug directly into the structure of the prosthesis.
The contact angles were determined by processing the profile of the video image of drops (bubbles) using the author's program "Promer" written by employees of the Department of Chemistry of M.V.
Gast, Physical chemistry of surfaces, sixth ed., A Wiley-Interscience Publication, New York, 1997
Relationship between energy characteristics of surface of polymeric membranes and their transport properties, Russian Journal of Applied Chemistry. 91(8) (2018) 1311-1321
Online since: October 2010
Authors: Jian Ping Long, Wei Li, Shan Hua Chen, Jin Hui Lin, Ying Zeng
Interface Study of Short Mullite Fiber Reinforced Al-Cu-Si Alloy Composites Jianping Long 1,a,Wei Li2,b, Shanhua Chen 3,c , Jinhui Lin4,d,Ying Zeng5,e 1 ,3,4,5 College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059,PR China 2 School of Opto-electronic Information, University of Electronic Science and Technology of China, Chengdu 610054, PR China aemail:longjianping@cdut.cn, bemail:wli@uestc.edu.cn,cemail:chensh@cdut.edu.cn, demail:linjinh@cdut.edu.cn, eemail:zengy@cdut.edu.cn Keywords: Mullite fiber; Al-Cu-Si; Composite; Interface Abstract.
It is shown that chopped mullite fibers in the composites are polycrystalline in structure composed of many fine mullite crystal particles which are orthorhombic in structure with lattice constants of a = 0.749 nm, b = 0.927 nm and c = 0.581 nm based on electron diffraction (ED) analysis and high resolution transmission electron microscope (HRTEM).
Brandes [19] tells us that mullite is orthorhombic in structure with lattice constants: a = 0.749 nm, b = 0.927 nm and c = 0.581 nm.
The result of the present study is different from that of ref.[16] in which mullite is taken as tetragonal in structure with lattice constants: a = 0.755 nm, b = 0.769 nm and c = 0.288 nm.
Fig.5 TEM image of (3Al2O3·2SiO2)/Al-4.0Cu-5.0Si interface (a), EDS result (b) and SAD pattern (c) of one of the interfacial deposits Conclusions Short mullite fibers are polycrystalline in structure composed of many fine crystal particles.
Online since: November 2015
Authors: Siti Hajar Kasim, Ahmad Hazri Abdul Rashid, Wedianti Shualdi, Mohd Nasha’ain Nordin, Kartini Noorsal, Siti Farhana Hisham, Siti Noorzidah Mohd Sabri, Syazana Abu Bakar, Azreena Mastor
Chitosan based material is a hydrophilic polymer and has a crystalline structure with the interaction of hydrogen bonding among its polymer chains.
Covalent cross-linked can form an irreversible chemical links and leads to a formation of permanent network structure.
The percent of crystallinity that measured by the area of XRD’s pattern, had proved that the chitosan crystalline structure was transformed into a relatively amorphous structure after the cross-linked reaction.
This bonding had created a permanent amorphous structured compared to the ionic interaction [6].
Materials Chemistry and Physics Vol. 134 (2012), p.317-324 [9] T.
Online since: September 2013
Authors: Naratip Vittayakorn, Supamas Wirunchit, Supamas Wirunchit, Rangson Muanghlua, Wanwilai Vittayakorn
Nanocrystalline barium zirconium titanate synthesized by the sonochemical process Supamas Wirunchit1,a, Rangson Muanghlua2,b, Narin Atiwongsangthong2,c, Wanwilai Vittayakorn1,d and Naratip Vittayakorn1,3,4,e 1Electroceramics Research Laboratory, College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand 2Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand 3Advanced Ceramic Research Unit, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand 4Department of Electronics, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand aester_cins@hotmail.com, bkmrangso@kmitl.ac.th, ckanarin@kmitl.ac.th dkvwanwil@kmitl.ac.th, enaratipcmu@yahoo.com Keywords: Barium zirconium titanate, Sonochemical process, Nanocrystalline, BZT Abstract.
The crystal structure as well as molecular vibrations and morphology were investigated.
X-ray diffraction indicated that the powders exhibited a single phase perovskite structure, without the presence of pyrochlore or unwanted phases at the reaction time of 60 min.
This indicates (a) that the crystallization process remains incomplete for up to 15 min, after which the cubic Ba(Zr0.4 Ti0.6)O3 phase can be identified clearly by the Ba(Zr0.4 Ti0.6)O3 cubic structure from the JCPDS file No. 36-0019.
At 60 min of the sonochemical process, (c) displays a complete crystallite of perovskite structure that is formed without the presence of an impure or unwanted phase.
Online since: March 2012
Authors: Xin Fu
The high stability mesoporous MgO-ZrO2 materials as CO2 adsorbents Xin Fu1,a 1 College of Chemistry and Life Science, Weinan Teachers University, Weinan 714000, PR China a fuxin0117@163.com Keywords: CO2 adsorbent, high stability, MgO-ZrO2, nanocomposites.
The structure and surface properties of the as-prepared materials were characterized by XRD, N2 adsorption-desorption and CO2-TPD techniques.
Owing to the advantages of the mesoporous structure and the surface basicity, the as-prepared MgO-ZrO2 nanocomposites showed high CO2 adsorption capacity.
It was found that the structure of MgO-ZrO2 solid bases was greatly influenced by the composition.
The structure of MgO-ZrO2 was also affected by other aspects such as calcinations temperature and the synth esis procedure, and those will not be discussed in detail here.
Online since: August 2012
Authors: K. Navaneetha Pandiyaraj, Jan Heeg, Christoph Mewes, Marion Wienecke, Torsten Barfels, V. Uthayakumar, Pi Guey Su
The atomic concentration and structure of the Ag-DLC was measured by energy dispersive X-ray (EDX) and Raman spectroscopy.
Generally the Raman spectroscopy is a very efficient tool for investigating the detailed bonding structure of carbon films.
The changes confirmed the silver particles did not change the structure of the DLC films 3.4 Microhardness Figure-7.
The Raman spectra exhibits the structure of the DLC films did not changed the incorporation of silver.
Polycarpos Falaras, Institute of Physical Chemistry, NCSR Demokritos, Attikis, Athens, Greece for taking RAMAN studies References [1] Y.
Online since: November 2013
Authors: D.V. Kurmude, A.V. Raut, N.N. Waghule, K.M. Jadhav, Ram S. Barkule, D.R. Shengule
The X-ray diffraction pattern shows the Bragg’s peak which belongs to cubic spinel structure.
Nano-particles of spinel ferrites have attracted great interest for a long time in fundamental science, especially in addressing fundamental relationship between electrical properties and their crystal chemistry and structure [5].
From X-ray analysis, it is observed that the sample crystallize in single phase spinel structure of cubic symmetry.
Our results on cation distribution suggest that the prepared nickel ferrite posses partial inverse spinel structure and are supported by literature report [13] which states that NiFe2O4 in nanocrystalline form exhibits a mixed spinel structure with Ni2+ ions occupying both A and B sites.
The cation distribution results shows change from inverse spinel structure to partial inverse structure.