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Online since: October 2013
Authors: Jian She Hu, Yi Nan Liu, Ya Ting Song, Di Wang
The chemical structure was characterized by FT-IR and 1H NMR.
Depending on the chemical structure, it can achieve a macroscopic alignment of the cholesteric domains.
Therefore, it is necessary to design and synthesize some novel chiral LC monomers and polymers derived from menthol to study their structure-property relationships and explore their potential applications.
This indicates that the polymer chains hinder the formation of the helical supermolecular structure of the mesogenic units.
Synthesis, structure and properties of new chiral liquid crystalline monomers and homopolysiloxanes containing menthyl groups, Liq Cryst, 2008; 35(8): 925-935
Online since: December 2014
Authors: Mario Ueda, Adriano Gonçalves dos Reis, Lucila Mayumi Yogi, Maria Margareth da Silva, Susana Zepka, Danieli Aparecida Pereira Reis
Titanium alloys are widely used in machine building, aircraft manufacturing, medicine, motors, chemistry, and biomedicine due to their high strength-to-weight ratio, elasticity, corrosion resistance, and biocompatibility.
In particular, Ti-6Al-4V containing (a + β) structure plays a very important role in aerospace industry in the manufacturing of components such as disks and blades for aircrafts turbines and structural forgings.
For the creep tests it used the Ti-6Al-4V acquired in the form of cylindrical bars of 12.7 mm diameter and 1 m length in the provided wrought and annealed at 190 °C for 6 hours and cooled in air, having equiaxial structure.
Online since: November 2012
Authors: A.J. Pontes, Mauro C.R. Garcia, Aurelio C.S. Netto
János Móczó et. al [2,3] have studied that the characteristics of all heterogeneous polymer systems including composites containing either micro or nanofillers are determined by four factors: component properties, composition, structure and interfacial interactions.
Segregation, aggregation and the orientation of anisotropic particles determine structure.
Pukánszky, Polymer micro and nanocomposites: Structure, interactions, properties, J.
Chemistry. 14 (2008) 535-563
Termonia, Structure-property relationships in nanocomposites, Polymer. 48 (2007) 6948-6954
Online since: October 2011
Authors: Yu Bao Zhao, Feng Jiao Wu, Ri Xiong Chen, Zhao Feng Wu, Jun Qin, Na Zhang
Preparation of nanostructured Li4Ti5O12 by hydrothermal ion exchange of protonated titanate Yubao Zhao1,a, Fengjiao Wu1,b, Rixiong Chen1,c, Zhaofeng Wu2,d Jun Qin1,e and Na Zhang1,f 1School of Chemistry and Chemical Engineering, University of South China,Hengyang 421001,China 2Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R.
It clearly shows that Li4Ti5O12 has a good nanotube structure with the diameters of approximately 10 nm and the length ranging from tens to hundreds of nanometers ( left picture in Fig. 1) without heat treatment, while after calcined at 700 oC the tubular structure began to collapse and formed roughly flat nanosheets (right picture in Fig. 1).
Crystal Structures.
Online since: November 2010
Authors: Ci Jun Shuai, Shu Ping Peng, Cheng De Gao, Yi Nie
Former experimental research has shown that the optical fiber couplers are very different in optical performance and geometrical structures even though they are fabricated at the same conditon of technological parameters [4-6].
Structure design of the mechanical movement system Mechanical movement system consists of main drawing movement platform, heating movement platform and packaging movement platform.
Its structure is shown in Figure 2.
Its structure is shown in Figure 4.
Cheng: Materials Chemistry and Physics Vol. 69 (2001), p.199
Online since: February 2017
Authors: Stepan Alexandrovich Lushnikov, Tatyana Victorovna Filippova
Stability of MgH2 Samples after Thermodesorption Lushnikov Stepan Alexandrovich1,a* and Filippova Tatyana Victorovna2,b 1,2Department of Chemistry Lomonosov Moscow State University, Moscow 119991, Russia alushnikov@hydride.chem.msu.ru, btania.filippova@inorg.chem.msu.ru Keywords: magnesium hydride, X-ray diffraction, phase transition, hydrogen diffusion.
At ambient condition MgH2 has α-MgH2 modification with tetragonal structure (P42/mnm, No. 136) [5].
For the high pressure conditions it was reported on the metastable γ-MgH2 with an orthorhombic structure (Pbcn, No. 60) [6]. β-MgH2 phase was recently discussed in work [1] with modified CaF2 structure (Pa-3, No. 205).
Hydrogen atoms in crystal lattices structure of these phases are in ordered and disordered states.
Online since: February 2008
Authors: Soon Yong Jeong, Kwang Eun Jeong, Ho Jeong Chae, Ung Chul Kim, Wha Seung Ahn
Oxidation of Sulfur Components in Diesel Fuel with tert-Butyl Hydroperoxide Using Chromium Containing Catalysts Kwang-Eun Jeong 1, a, Ho-Jeong Chae 1, b, Ung-Chul Kim 1, c, Soon-Yong Jeong1, d , Wha-Seung Ahn 2, e 1 New Chemistry Division, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yuseong-gu, Daejeon 305-600, Korea 2 Department of Chemical Engineering, Inha University, Incheon 402-751, Korea a jkestory@krict.re.kr, bhjchae@krict.re.kr, ccukim@krict.re.kr, dsyjeong@krict.re.kr, ewhasahn@inha.ac.kr * Corresponding author: syjeong@krict.re.kr Keywords: Hexagonal Mesoporous Aluminophosphate; AlPO-5; Oxidative desulfurization; Chromium Abstract.
Cetyltrimethylammonium bromide (CTAB) was employed as the structure-directing template during the synthesis.
Results and discussion XRD patterns shown in Fig. 1 (a) provide an evidence for the essentially retained crystalline structure of HMA upon the transition metal (Cr, Co and Fe) substitution with well resolved reflections corresponding to the mesoporous hexagonal MCM-41 structure [8].
Oxidation activity of microporous Cr-AlPO4-5 was tested in order to investigate the effect of pore structure of support materials.
Online since: September 2013
Authors: Iulian Antoniac, Stefan Ioan Voicu, Lacramioara Naftanaila, Gheorghe Nechifor
The structure and morphology of the membranes were structurally and morphological characterized and used for different biomedical applications such specific separation of proteins or glucose from synthetic blood solutions.
After diazotization, the membranes with diazonium salt in their pore structure were used for the following functionalization steps.
The stability of the material can be explained by the adsorption of aniline molecules in polysulfone membrane structure.
Also the membrane with Rhodamine B in structure present a good affinity for proteins (due to the free electrons from the nitrogen atoms).
Glória, Influence of processing on the levels of amines and proline and on the physico-chemical characteristics of concentrated orange juice, Food Chemistry 119 (2010) 7-11.
Online since: May 2013
Authors: Teng Fei Shen, Ying Juan Sun, Fa Chao Wu
The curing kinetic researches lead to a better knowledge of the curing behavior and the final structures of networks.
The chemical structures of EnE and THPA are shown in scheme 1.
Structures of EnE and THPA Sample Preparation.
Considering the chemical structure difference of azobezene and E6E, the catalytic mechanism in scheme 2 was supposed.
Astarita: Industrial & Engineering Chemistry Research.
Online since: April 2016
Authors: Dariusz Zasada, Robert Jasionowski, Wojciech Polkowski
., Poland 2 Faculty of Advanced Technology and Chemistry, Military University of Technology, 00-908 Warsaw, 2 Kaliskiego Str., Poland a r.jasionowski@am.szczecin.pl, b wojciech.polkowski@wat.edu.pl, c dzasada@wat.edu.pl Keywords: cavitation, cavitation wear, titanium, EBSD Abstract.
Results and discussion The Ti99.7 titanium in its initial state was characterized by the α single phase structure.
Results of the EBSD evaluation of the Ti99.7 titanium structure: a) the inverse pole figure map, b) the basic triangle, c) the inverse pole figure for ND, d) area fraction distribution of the grain size, e) number fraction distribution of the grain size The Ti99.7 titanium exhibited a good cavitational resistance upon testing on the vibration stand.
Smith, Structure and Properties of Engineering Alloys, McGraw-Hill, 1993
Henkel, Structure and Properties of Engineering Materials, McGraw-Hill, 2002