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Online since: January 2017
Authors: Ru Feng Jia, Wei Dong Zhang, Li Jin Xu, Jian Qu, Xiao Xue, Zhuo Yang, Zhong Yu He, Jie Qin, Yanwen LI
Beijing, China 2Department of Chemistry, Renmin University of China, Beijing, China 3School of Civil Engineering, North China University of Technology, Beijing, China aliyanwen@cscec.com, bxuexiao-1989@163.com, c1256197073@qq.com, dhezhongyu@cscec.com, eqinjie@cscec.com, fzwdpt@sohu.com, gxulj@chem.ruc.edu.cn, hqujian@cscec.com, ijiarufeng@cscec.com *Corresponding author Keywords: Rapid Setting, Waterproof Mortar, Compressive Strength, Flexural Strength, Adhesion Strength, Water Impermeability.
Consequently, it is of particular significance to prevent water from penetrating into the reinforced concrete structures.
Water repellent surface impregnation for extension of service life of reinforced concrete structures in marine environments: the role of cracks.
Porosity, pore structure and water absorption of polymer-modified mortars: An experimental study under different curing conditions.
Influence of nano materials in the distressed retaining structure for crack filling.
Online since: March 2024
Authors: Ari Handono Ramelan, Hery Purwanto, Ahmad Marzuki, Retno Willy Astuti, Harjana Harjana, Anisa Nandita Rahmawati, Rivina Oktafiani, Frisca Aulia Alvyanti, Artono Dwijo Sutomo, Devara Ega Fausta
After obtained the density of glass, the analysis can be expanded to obtain several physical properties which can be the preliminary study of structure inside the glass.
Monovalent ions such Li+ and Na+ commonly colorless, so when it enter to the glass structure which dominated by divalent and monovalent ions, it can act as glass decolorant [25].
It was altered by coordination numbers, modify in glass network configuration, structural loosen, the dimensionsional of spaces in the structure, and cross-link density [27].
Cambridge: Royal Society of Chemistry (2005)
Kamitsos, Short-range structure, thermal and elastic properties of binary and ternary tellurite glasses, J.
Online since: February 2021
Authors: Dai Ueda, Naozumi Fujiwara, Masayuki Otsuji, Yousuke Hanawa, Hiroaki Takahashi, Kazuhiro Fukami, Hiroaki Kitagawa
Vereecke et al. pointed out that the suppression of the etching rate in the nanometer-sized spaces could not be explained only by the impact of EDL and proposed the dissociation depression caused by decrease of H2O permittivety by H2O structuring [3].
The dependence of the etching rate on the structure geometry was investigated using various SiO2 films with a thickness of 3, 5, and 10 nm.
Measured etch amount of SiO2 etching in the structures was observed by X-SEM (Hitachi High-Technologies, S-4800 and SU9000) or FIB-TEM (Hitachi High-Technologies, H-9500).
This tendency provides evidence to suggest that the enrichment of etchant ions was increased because the surfactants were concentrated into the narrow structure since the hydrophobicity effect was higher in narrower space structures.
Kinoshita, Physical Chemistry Chemical Physics, 19 (2017) 16323-16328
Online since: November 2015
Authors: Yin Zhi Jiang, Huo Ying Xu, Gong Cheng Zhao, Zhu Ting Fu
Synthesis and Catalytic Properties of Cu2+ Complexes with 4-Amino-antipyrine Schiff bases in Dye Degradation Yinzhi Jiang*, Gongcheng Zhao, Zhuting Fu, Huoying Xu 1 Chemistry Department, Zhejiang Sci-Tech University, Hangzhou 310018, PR China * Corresponding author: Yinzhi Jiang; E-mail: jiangyinzhi@zstu.edu.cn Keywords: Synthesis, Cu2+ Complex, Schiff base, Dye Degradation, Model Enzyme Abstract.
Results and Dicussion Composition and Structure.
Composition and structure of the complexes were determined by the IR spectra, UV spectra and elemental analysis.
Table 1 Composition and structure of the complexes Complex Elemental analysis/ % Found (calculate) UV spectra[nm] IR spectra[cm-1] C H N M Kπ-π* R n-π* LMCT νO-H νC=O νC=N νPh-O νM-N νM-O CuLa.OH CuC18H16N3O2.OH 55.72 4.17 10.79 16.73 (55.87 4.44 10.86 16.42) 233 309,348 3446 1654 1592 1269 --- --- 230 336,370 413,535 3455 1633 1616 1201 508 480 CuLb.OH.H2O CuC19H18N3O3.OH.H2O 52.84 5.09 10.23 14.34 (52.46 4.88 9.66 14.61) 234 342 --- 3433 1624 1582 1214 --- --- 232 315,393 408,542 3443 1649 1602 1248 508 417 CuLc.OH CuC19H18N3O3.OH 55.19 4.89 10.32 15.16 (54.72 4.60 10.08 15.24) 226 332 --- 3434 1664 1600 1247 --- --- 233 313,378 415,520 3444 1650 1616 1201 508 466 CuLd.OH CuC26H32N3O2.OH 62.28 6.21 8.40 12.72 (62.56 6.68 8.42 12.73) 238 323,353 --- 3420 1652 1612 1250 --- --- 235 340,375 432 3557 1638 1604 1253 539 473 CuLe.
The structure were showed in Fig.1 Fig.1 The structure of the complexes Dye Degradation.
Online since: November 2011
Authors: Shuan Shi Fan, Juan Du, Yan Hong Wang, Xue Mei Lang
Its unique structure enables it been potential in many applications like heat transfer [1, 2], gas separation [3-8], gas storage [9, 10], gas transportation [11], and other energy applications.
It is reported that Type A and Type B are two structures of TBAB hydrate, with the hydration number 26 for Type A and 38 for Type B[8,14].
On the other hand, the crystallization parameter m is the factor which determines the micro crystals structure.
Liang, “CO2 capture from binary mixture via forming hydrate with the help of tetra-n-butyl ammonium bromide,” Journal of Natural Gas Chemistry, vol.18, Mar 2009, pp. 15-20, doi: 10.1016/s1003-9953(08)60085-7
Narita, “Tetra-n-butylammonium bromide-water (1/38),” Acta Crystallographica Section C-Crystal Structure Communications, vol.61, Feb 2005, pp. 065-066, doi: 10.1107/s0108270104032743 [20] W.
Online since: March 2019
Authors: Ojiyed Tegus, Zhan Quan Yao, Li Juan Zhao, Xiao Tian, Xuan Zhao
The surface domain structures were observed by atomic force microscopy (AFM).
Doping with yttrium have an effect on the change of magnetic domain structure of the binary alloy.
The magnetic domain structure was observed by atomic force microscopy (AFM, type Oxford).
Compared with Fe83Ga17 alloy, the ternary Fe-Ga-Y alloys contain multiphase structures, including the A2 phase with bcc structure and a small amount of (FeGa)17Y1.76 secondary phase with hexagonal structure.
The gray (dark grey) organization and white (light grey) matrix are inferred as the A2 phase with bcc structure and (FeGa)17Y1.76 phase with hcp structure, respectively.
Online since: November 2015
Authors: M. Jayachandran, A. Ayeshamariam, J. Shanthi, S. Rani, S. Thanka Rajan
The films have (002) preferred orientations with wurtzite structure.
Using the XPS technique the chemistry of the CdSe/GaAs interface and the composition of CdSe were determined.
The fully annealed films have a hexagonal crystal structure for x≤ 0.4 and a cubic structure for x≥ 0.6 with varying lattice constants and grain size.
Kar, Journal of Electroanalytical Chemistry (2015) 23, 742
Chemistry (2008) 175, 615
Online since: May 2011
Authors: Li Ping Liu, Ya Nan Liu, Xiao Jian Ma, Peng Zhang
The structure and surface characteristics of the catalyst were measured by scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential thermal analyzer (TG-DSC).
It is well established that the more ordered the carbon structure, the higher is the temperature required for gasification.
Mirodatos: Green Chemistry.
Online since: September 2024
Authors: Francois Guillou, Jia Yun Xue, Hargen Yibole
Structure, Magnetic and Magnetocaloric Properties of Attempted P Substitutions in LaFe11.5Si1.5 Giant Magnetocaloric Material Jia-Yun Xue1,a, Hargen Yibole1,2,b* and Francois Guillou1,2,c 1College of Physics and Electronic Information, Inner Mongolia Normal University, 81 Zhaowuda Rd, Hohhot 010022, China 2Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, 81 Zhaowuda Rd, Hohhot 010022, China axuejiayun1230@163.com, bhyibole@imnu.edu.cn, cfrancoisguillou@imnu.edu.cn Keywords: magnetocaloric effect; first-order magnetic transition; magnetocaloric materials; La(Fe,Si)13 based alloy Abstract.
Recent theoretical and experimental studies suggested that P can enter the structure of La(Fe,Si)13 alloys and lead to a significant enhancement of the isothermal entropy change, one of the two main quantities characterizing the magnetocaloric effect.
In ternary La(Fe,Si)13 alloys [8-9,12], the formation of the 1:13 phase with NaZn13 structure is closely related to the Si content.
When 1.2 ≤ Si ≤ 2.6, the alloy has a NaZn13-type cubic crystal structure with a lattice parameters of ~ 1.15 nm.
Rodríguez-Carvajal, Recent advances in magnetic structure determination by neutron powder diffraction, Phys.
Online since: June 2015
Authors: Oleg Shcherban, Roman E. Gladyshevskii, Enrico Giannini, Marc Dhallé
Substituted Bi-2212 and Bi-2223 HTSC Oleh Shcherban1,2,a, Roman Gladyshevskii1, Enrico Giannini3 and Marc Dhallé3,b 1 Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Lviv, Ukraine 2 Scientific Consulting Company “Structure-Properties”, Lviv, Ukraine 3 Department of Physics of Condensed Matter, University of Geneva, Geneva, Switzerland a e-mail: sccstros@lviv.farlep.net; b present address: University of Twente, Enschede, The Netherlands Keywords: high-Tc superconductor, Bi-2212, Bi-2223, phase formation, crystal structure.
The effect of substitution on the modulation in the 2212 structure was studied by us in [3,4].
The crystal structures were refined using the Rietveld technique.
The ideal tetragonal crystal structures of HTSC (Fig. 1) do not reflect the complexity of the real structures.
Galez, Crystal Structures of High-Tc Superconducting Cuprates, in: Ch.P.