Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: June 2014
Authors: Li Ming Zhang, Jian Wei Zhou, Bo Chai, Hai Yan Gao, Yong Hui Wang, Qi Rong Li
They are all loosely structured, voids developed.
The coal gangue leaching filtrate can be evenly distributed in the slope soi when it rains.The diving flow and soil water flow dissolved with light ring PAH is slow.There are plenty of time to infiltrate and diffuse.It may also be related to the lower soil structure of the slope, and it needs further research.
For the PAHs have similar chemical structures and same carcinogenic mechanism, the toxicity equivalent factor convert the concentration of PAHs into a certain toxic equivalent concentration (TEC) of PAHs, then add the PAHs’ TECs to get the total toxicity equivalent concentrations (TTEC) of PAHs.The higher total toxicity equivalent concentration, the greater toxicity of the cancer.
[5] Yue Cheng,Guoying Sheng,Jiamo Fu :Environmental Chemistry.
:Environmental Chemistry.
The coal gangue leaching filtrate can be evenly distributed in the slope soi when it rains.The diving flow and soil water flow dissolved with light ring PAH is slow.There are plenty of time to infiltrate and diffuse.It may also be related to the lower soil structure of the slope, and it needs further research.
For the PAHs have similar chemical structures and same carcinogenic mechanism, the toxicity equivalent factor convert the concentration of PAHs into a certain toxic equivalent concentration (TEC) of PAHs, then add the PAHs’ TECs to get the total toxicity equivalent concentrations (TTEC) of PAHs.The higher total toxicity equivalent concentration, the greater toxicity of the cancer.
[5] Yue Cheng,Guoying Sheng,Jiamo Fu :Environmental Chemistry.
:Environmental Chemistry.
Online since: September 2018
Authors: Jiratchaya Ayawanna, Namthip Kingnoi, Nattapol Laorodphan
Barium (Zinc) Borosilicate Sealing Glass and Joining Interface with YSZ Electrolyte and Crofer22APU Interconnect in SOFCs
NAMTHIP Kingnoi1,a*, JIRATCHAYA Ayawanna2,b
and NATTAPOL Laorodphan3,c
1,2School of Ceramic Engineering, Institute of Engineering, Suranaree University of Technology, 111 University Avenue, Suranaree, Muang Nakhon Ratchasima, 30000 Thailand
3Department of Industrial Chemistry and Textile Technology, Faculty of Science, Maejo University, 63 Moo 4, Nongharn, Sansai, Chiang Mai, 50290 Thailand
a*Namthipkingnoi@hotmail.com, bjiratchaya@sut.ac.th, cnattapol.lao@gmail.com
Keywords: Barium borosilicate glass; Zinc oxide; glass sealant; solid oxide fuel cells; pre-oxidation
Abstract.
The local structure of the BaBS and BaBS-Zn glass, as evaluated by FTIR technique, are also similar (not shown here).
The surface topology exhibited a uniform polycrystalline structure with ridges creating polygonal shaped outlines throughout the surface (Fig. 5B - 5D).
Department, Ceramic Materials for Solid Oxide Fuel Cells, Department of Chemistry/Universidade Federal de Minas Gerais Brasil
Salvo, Thermal cycling of Crofer22APU sealant-anode supported electrolyte joined structures for planar SOFCs up to 3000h, Mater.
The local structure of the BaBS and BaBS-Zn glass, as evaluated by FTIR technique, are also similar (not shown here).
The surface topology exhibited a uniform polycrystalline structure with ridges creating polygonal shaped outlines throughout the surface (Fig. 5B - 5D).
Department, Ceramic Materials for Solid Oxide Fuel Cells, Department of Chemistry/Universidade Federal de Minas Gerais Brasil
Salvo, Thermal cycling of Crofer22APU sealant-anode supported electrolyte joined structures for planar SOFCs up to 3000h, Mater.
Online since: March 2019
Authors: Ahmad Kusumaatmaja, Iman Santoso, Fiqhri Heda Murdaka, Isnaeni Isnaeni
Introduction
Graphene was succesfully isolated for the first time in 2004; it is a two dimensional material consist of carbon atom in the shape of hexagonal structure [1].
One of the methods to create band gap energy in Graphene is to confine the Graphene structure to be Quantum Dots.
Wu, Electrophoretic fabrication of highly robust, efficient, and benign heterojunction photoelectrocatalysts based on graphene-quantum-dot sensitized TiO 2 nanotube arrays, Journal of Materials Chemistry A. 1.11 (2013) 3551-3555
Guo, Stabilization, and induction of oligonucleotide i-motif structure via graphene quantum dots, ACS nano. 7.1 (2012) 531-537
Ruoff, Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly (sodium 4-styrenesulfonate), Journal of Materials Chemistry. 16.2 (2006) 155-158
One of the methods to create band gap energy in Graphene is to confine the Graphene structure to be Quantum Dots.
Wu, Electrophoretic fabrication of highly robust, efficient, and benign heterojunction photoelectrocatalysts based on graphene-quantum-dot sensitized TiO 2 nanotube arrays, Journal of Materials Chemistry A. 1.11 (2013) 3551-3555
Guo, Stabilization, and induction of oligonucleotide i-motif structure via graphene quantum dots, ACS nano. 7.1 (2012) 531-537
Ruoff, Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly (sodium 4-styrenesulfonate), Journal of Materials Chemistry. 16.2 (2006) 155-158
Online since: June 2012
Authors: Ai Dong Tang, Duo Wang
Electrochemical Performance of Cu2SO3·CuSO3·2H2O Synthesized by Hydrothermal Method
Duo Wang, Ai Dong Tang *
(School of Chemistry and Chemical Engineering, Central South University, Changsha, China, 410083)
307320196@qq.com, tangaidong@126.com
Keywords: Chevreul’s salt, Mixed valence systems, Electrochemical performance
Abstract.
Nevertheless, Studies of this type of compound had not been intensified until its crystalline structure was determined by Kierkegaard and Nyberg [1] in 1965.
The structure was described in terms of coordination polyhedra: SO3 trigonal pyramids, CuI O3S tetrahedral and CuIIO4(H2O)2 octahedral.
It indicates that the structure of Cu2SO3·CuSO3·2H2O is instable during the first discharge process.
The CV result shows that the structure of Cu2SO3·CuSO3·2H2O is instable during the first discharge process.
Nevertheless, Studies of this type of compound had not been intensified until its crystalline structure was determined by Kierkegaard and Nyberg [1] in 1965.
The structure was described in terms of coordination polyhedra: SO3 trigonal pyramids, CuI O3S tetrahedral and CuIIO4(H2O)2 octahedral.
It indicates that the structure of Cu2SO3·CuSO3·2H2O is instable during the first discharge process.
The CV result shows that the structure of Cu2SO3·CuSO3·2H2O is instable during the first discharge process.
Online since: November 2014
Authors: Xian Yuan Wei
With the rapid development of science and technology, scientists have further researched the structure of lotus.
Fig. 5 The micro structure the lotus leaf Fig. 6 The micro structure the lotus leaf There are already many reports indicate that the waterproof property can be successfully achieved by processing the surface texture.
Then, the surface must possess a certain roughness; this coarse fiber structure should be as small as nanometer level.
As experts in the textile area, Xu jian and his colleagues from the Institute of Chemistry Chinese Academy of Sciences have invented bionic lotus leaves--polypropylene fabric which has reproduce the amphiphobic properties of lotus leaves.
It is just the wispy research that makes us find the nanometer-scale microscopic structure in lotus leaves.
Fig. 5 The micro structure the lotus leaf Fig. 6 The micro structure the lotus leaf There are already many reports indicate that the waterproof property can be successfully achieved by processing the surface texture.
Then, the surface must possess a certain roughness; this coarse fiber structure should be as small as nanometer level.
As experts in the textile area, Xu jian and his colleagues from the Institute of Chemistry Chinese Academy of Sciences have invented bionic lotus leaves--polypropylene fabric which has reproduce the amphiphobic properties of lotus leaves.
It is just the wispy research that makes us find the nanometer-scale microscopic structure in lotus leaves.
Online since: December 2006
Authors: Han Jun Oh, Kyung Wook Jang, Jong Ho Lee, Beom Su Ki, Chang Hoe Heo, So Hyun Kwon, Choong Soo Chi
Dislocation cell structure in aluminum substrates.
As shown in Fig. 2, dislocation density of aluminum substrate decreases, and the size of dislocation cell structure increases with annealing temperature and duration time.
Dislocation cell structures in aluminum substrate annealed for 1 h (a), 3 h (b), 6 h (c), 10 h (d) at 300 ºC, for 1 h (e), 3 h (f), 6 h (g), 10 h (h) at 400 ºC, and for 1 h (i), 3 h (j), 6 h (k), 10 h (l) at 500 ºC.
Fig. 3(a) shows the pore cell structures on alumina surface formed by two-step anodization for non-annealed aluminum, and also indicates that surface density of pores of 1.1×1014 pores/m2 and average interpore distance of 100 nm.
SEM images of alumina layer formed by two-step anodization at 40 V for 1 h in oxalic acid, (a) pore cell structures, (b) cross-sectional area of anodic layer, and (d) bottom view of alumina film detached from aluminum substrate.
As shown in Fig. 2, dislocation density of aluminum substrate decreases, and the size of dislocation cell structure increases with annealing temperature and duration time.
Dislocation cell structures in aluminum substrate annealed for 1 h (a), 3 h (b), 6 h (c), 10 h (d) at 300 ºC, for 1 h (e), 3 h (f), 6 h (g), 10 h (h) at 400 ºC, and for 1 h (i), 3 h (j), 6 h (k), 10 h (l) at 500 ºC.
Fig. 3(a) shows the pore cell structures on alumina surface formed by two-step anodization for non-annealed aluminum, and also indicates that surface density of pores of 1.1×1014 pores/m2 and average interpore distance of 100 nm.
SEM images of alumina layer formed by two-step anodization at 40 V for 1 h in oxalic acid, (a) pore cell structures, (b) cross-sectional area of anodic layer, and (d) bottom view of alumina film detached from aluminum substrate.
Online since: January 2007
Authors: Pisit Apichayakul, Sittichai Wirojanupatump, Sukanda Jiansirisomboon
The microstructure of the Ni20Cr flame sprayed coating (Fig.1(d)) shows a typical
larmella structure and good cohesion of splats.
The coating has a dense structure with 1.8 percent porosity.
Therefore, good adhesion of coating and substrate with a dense lamella structure was obtained, as shown in Fig.1(g).
The arc sprayed Ni20Cr coating showed a thinner splat, less porosity and denser structure compared with the flame sprayed coating.
These figures correlate with the thinner splat and finer lamella structure found in the arc sprayed coating.
The coating has a dense structure with 1.8 percent porosity.
Therefore, good adhesion of coating and substrate with a dense lamella structure was obtained, as shown in Fig.1(g).
The arc sprayed Ni20Cr coating showed a thinner splat, less porosity and denser structure compared with the flame sprayed coating.
These figures correlate with the thinner splat and finer lamella structure found in the arc sprayed coating.
Online since: September 2011
Authors: Johannes Frantti, Yukari Fujioka, Sven C. Vogel, Jian Zhong Zhang, Zhi Jun Lin, Helmut Reiche, Adrian Losko, Luke L. Daemen
Both conventional solid-state reaction [3] and ion-implantation
[4] were used to introduce the manganese ions into the crystal structure of ceramics.
Rietveld refinements were carried out using the program General Structure Analysis System (GSAS) [10].
For x < 0.05 an orthorhombic symmetry, space group Pbnm, was revealed, whereas the structure was a two-phase systems for 0.15 < x < 0.33.
Journal of Solid State Chemistry Vol. 177 (2004), p. 2726 [2] T.
General Structure Analysis System.
Rietveld refinements were carried out using the program General Structure Analysis System (GSAS) [10].
For x < 0.05 an orthorhombic symmetry, space group Pbnm, was revealed, whereas the structure was a two-phase systems for 0.15 < x < 0.33.
Journal of Solid State Chemistry Vol. 177 (2004), p. 2726 [2] T.
General Structure Analysis System.
Online since: June 2008
Authors: Elena A. Fortalnova, Sergei Yu. Stefanovich, Nikolay U. Venskovskii, Ekaterina D. Politova, Marina G. Safronenko, V.V. Murasheva
Karpov Institute of Physical Chemistry, Vorontsovo pole 10, 103064, Moscow, Russia
a
fortalnova_elena@mail.ru, bpolitova@cc.nifhi.ac.ru
Keywords: BIMEVOX, phase transitions, oxide ion conductors.
The samples with x = 0.0 and 0.05 have orthorhombic structure (αphase) (Fig. 2a).
Splitting of these bands in the spectra of samples with x ≤ 0.1 indicates the presence of unequal length bonds that are characteristic of an orthorhombic structure.
The abrupt decrease in the SHG signal intensity in the β-phase stability range (0.05 ≤ x ≤ 0.15) points to the centrosymmetric crystal structure.
The temperature dependence of the SHG signal intensity in the BIZRVOX sample with x = 0.05 confirms the non-centosymmetry of the structure at room temperature (Fig. 4).
The samples with x = 0.0 and 0.05 have orthorhombic structure (αphase) (Fig. 2a).
Splitting of these bands in the spectra of samples with x ≤ 0.1 indicates the presence of unequal length bonds that are characteristic of an orthorhombic structure.
The abrupt decrease in the SHG signal intensity in the β-phase stability range (0.05 ≤ x ≤ 0.15) points to the centrosymmetric crystal structure.
The temperature dependence of the SHG signal intensity in the BIZRVOX sample with x = 0.05 confirms the non-centosymmetry of the structure at room temperature (Fig. 4).
Online since: May 2006
Authors: Jing Cong Luo, Xiu Qun Li, Xiang Tao Mo, Zhi Ming Yang, Ting Wu Qin, Hui Qi Xie
This scaffold was selected with
pore diameters very similar to a natural bone, and with structurally distinct surface characteristics
and network structure.
Water contact angles were determined using the sessile drop method to test the surface chemistry.
The scanning electron micrograph and scanning probe micrograph of the scaffold surface shown in Fig. 1B and C clearly illustrate its nano network structure.
In our study, the substrates with nano structures influenced the behavior of attached osteoblasts.
It maintained the natural crystalline phase structure and components.
Water contact angles were determined using the sessile drop method to test the surface chemistry.
The scanning electron micrograph and scanning probe micrograph of the scaffold surface shown in Fig. 1B and C clearly illustrate its nano network structure.
In our study, the substrates with nano structures influenced the behavior of attached osteoblasts.
It maintained the natural crystalline phase structure and components.