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Development of Fast Synthetic Method and Analytical Technology for Linkage-Isomeric Oligosaccharides
Online since: January 2005
Authors: Eun Sun Yoo, In Mo Yoon
Introduction
Carbohydrates have inherently complicated structures for which there is no currently available
comprehensive and highly sensitive analytical methodology [1-3].
Methods for the synthesis of such structures in amounts sufficient for study are important for both biochemical and medical purposes.
Electrospray process The rationale of a linkage study using ESI MS/MS was that structures with more freedom of motion would more readily dissipate the energy absorbed from collision-activated dissociation events.
[14] Advanced information on the Nobel Prize in Chemistry 2002, (Information Department, Trans Tech Publications.
Methods for the synthesis of such structures in amounts sufficient for study are important for both biochemical and medical purposes.
Electrospray process The rationale of a linkage study using ESI MS/MS was that structures with more freedom of motion would more readily dissipate the energy absorbed from collision-activated dissociation events.
[14] Advanced information on the Nobel Prize in Chemistry 2002, (Information Department, Trans Tech Publications.
Online since: December 2003
Authors: Takashi Nakamura, Kawashita Masakazu, Hyun Min Kim, Tadashi Kokubo, Xin-Yu Cui
Journal Citation (to be inserted by the publisher )
Copyright by Trans Tech Publications
Bonelike Apatite Formation on Anodically Oxidized Titanium Metal
in Simulated Body Fluid
Masakazu Kawashita1 , Xin-Yu Cui
1,2
, Hyun-Min Kim
3
, Tadashi Kokubo4
and Takashi Nakamura5
1
Department of Material Chemistry, Graduate School of Engineering, Kyoto University,
Sakyo-ku, Kyoto 606-8501, Japan
kawashita@sung7.kuic.kyoto-u.ac.jp
2
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P.R.
Recently, it has been shown that titania gel with anatase structure showed an excellent apatite-forming ability in a body environment [3].
Therefore, the titania layer with anatase structure can be formed on the surface of tough titanium metal by the anodic oxidation, and hence the anodically oxidized titanium metal is expected to show a high apatite-forming ability in a body environment.
In contrast, they formed titania layers with essentially rutile structure on their surfaces in H2SO4 and Na2SO4 solutions and the relative amount of rutile to anatase increased with increasing applied voltage (Figs. 1-(c) and (d)).
Recently, it has been shown that titania gel with anatase structure showed an excellent apatite-forming ability in a body environment [3].
Therefore, the titania layer with anatase structure can be formed on the surface of tough titanium metal by the anodic oxidation, and hence the anodically oxidized titanium metal is expected to show a high apatite-forming ability in a body environment.
In contrast, they formed titania layers with essentially rutile structure on their surfaces in H2SO4 and Na2SO4 solutions and the relative amount of rutile to anatase increased with increasing applied voltage (Figs. 1-(c) and (d)).
Online since: April 2016
Authors: Shao Peng Yang, Bo Yang Liu, Li Wei, Tie Ning Wang
P3HT, PCBM and 1-Bromo-4-Nitrobenzene molecular formula and the device structure of organic polymer solar cells ITO/PEDOT: PSS/P3HT: PCBM/LiF/Al is shown in Fig. 1.
Fig. 1 Schematic diagram of molecular structures of P3HT, PCBM and 1-Bromine-4-Nitrobenzene and the device structure Materials of P3HT and PCBM were mixed together with the mass ratio of 1:1, dissolved in chlorobenzene benzene / formyl trichloride (CB/CF=1:1) mixed solvents, to prepare five copies of solution with the concentration of 20mg/ml, added by 1-Bromo-4-Nitrobenzene with the mass ratio of OWT%, 15wt%, 20wt%, 25wt%, and 30wt% orderly.
References [1] Yu Huangzhong, Peng Junbiao: Progress in Chemistry ,2007,(19):1689-1694
Fig. 1 Schematic diagram of molecular structures of P3HT, PCBM and 1-Bromine-4-Nitrobenzene and the device structure Materials of P3HT and PCBM were mixed together with the mass ratio of 1:1, dissolved in chlorobenzene benzene / formyl trichloride (CB/CF=1:1) mixed solvents, to prepare five copies of solution with the concentration of 20mg/ml, added by 1-Bromo-4-Nitrobenzene with the mass ratio of OWT%, 15wt%, 20wt%, 25wt%, and 30wt% orderly.
References [1] Yu Huangzhong, Peng Junbiao: Progress in Chemistry ,2007,(19):1689-1694
Online since: March 2019
Authors: Yoshiro Yamashita, Altan Bolag
Organic Field-Effect Transistors Based on 3’-Flouro-2,2',6,6'-Tetraphenyl-4,4'-Dipyranylidene
Altan Bolag1,a*, Yoshiro Yamashita2,b
1College of Physics and Electronic Information, Inner Mongolia Normal University,
Hohhot 010022, China
2Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan
aaltan.bolag@imnu.edu.cn, byoshiro@echem.titech.ac.jp
Keywords: organic filed-effect transistors; dipyranylidene; mobility; HMDS; crystallinity.
The effect of meta-positioned fluorine on the DP core structure were investigated through theoretical calculations, photophysical/electrochemical properties and FET performance, in comparison with DP and 4’-flouro-2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (4FDP).
The highest occupied molecular orbitals (HOMO) and the lowest unoccupied molecular orbitals (LUMO) overlap all through the molecular structures for all the molecules.
Considering the similar molecular structure of 3FDP and 4FDP, 3FDP is possible to have an alike formation on the substrate.
The effect of meta-positioned fluorine on the DP core structure were investigated through theoretical calculations, photophysical/electrochemical properties and FET performance, in comparison with DP and 4’-flouro-2,2',6,6'-tetraphenyl-4,4'-dipyranylidene (4FDP).
The highest occupied molecular orbitals (HOMO) and the lowest unoccupied molecular orbitals (LUMO) overlap all through the molecular structures for all the molecules.
Considering the similar molecular structure of 3FDP and 4FDP, 3FDP is possible to have an alike formation on the substrate.
Online since: February 2014
Authors: Pâmela Teixeira Fernandes, Osiris Canciglieri Junior
Development of method
According to Guimarães [12] a structured method of ideas for sustainable development should occur during design activity, especially during the planning process and the product concept.
Its structure allows its adoption in an easy, practical and fast, independent of the model of product development to be adopted, without generating additional costs to the design.
A modular approach to sustainability assessment and decision support in chemical process design, Industrial & Engineering Chemistry Research, 49 (2010) 7870-7881
Short, Structure and output mechanisms in Design for Environment (DfE) tools, Journal of Cleaner Production 35 (2012) 50-58
Its structure allows its adoption in an easy, practical and fast, independent of the model of product development to be adopted, without generating additional costs to the design.
A modular approach to sustainability assessment and decision support in chemical process design, Industrial & Engineering Chemistry Research, 49 (2010) 7870-7881
Short, Structure and output mechanisms in Design for Environment (DfE) tools, Journal of Cleaner Production 35 (2012) 50-58
Online since: December 2012
Authors: Yong Liang Zhao, Hai Bin Chu, Ying Nan Chen, Rui Jun Ma, Hai Xia Zhang, Ming Yan Zhao, Kai Kong, Feng Ying Zhao
Luminescence Properties of Inert lanthanide ion Doped Europium Complexes with 2-Pyrazinecarboxylic Acid and Butanedioic Acid
Mingyan Zhao, Ruijun Ma, Yingnan Chen, Haixia Zhang, Kai Kong, Haibin Chua, Fengying Zhao, Yongliang Zhao b
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
abinghai99@gmail.com, bhxzhaoyl@163.com
Keywords: Europium complexes; 2-Pyrazinecarboxylic acid; butanedioic acid; Luminescence; Doping
Abstract.
It is also reported that the lanthanide complexes with organic multi-carboxylic ligands, usually with a very innovative structure, the special spectroscopic properties can be achieved [3, 4].
The TG-DSC curves of the lanthanide complexes are similar, which indicated that the compositions and structures of the complexes are similar.
Gd3+ has the half-filled 4f-layer electron structure which is very stable and very difficult to be excited.
It is also reported that the lanthanide complexes with organic multi-carboxylic ligands, usually with a very innovative structure, the special spectroscopic properties can be achieved [3, 4].
The TG-DSC curves of the lanthanide complexes are similar, which indicated that the compositions and structures of the complexes are similar.
Gd3+ has the half-filled 4f-layer electron structure which is very stable and very difficult to be excited.
Online since: May 2011
Authors: Xiang Fu Meng, Zhi Wei Zhang, Nan Luo
Transparent Poly(methyl methacrylate)/TiO2 Nanocomposites for UV-shielding Applications
Xiangfu Menga, Zhiwei Zhang, Nan Luo
Department of Chemistry, Capital Normal University, Beijing 100048, China
aemail: xfmeng@iccas.ac.cn
Keywords: Nanocomposites; Poly(methyl methacrylate); Titania; Transparent; UV-shielding;
Abstract.
Results and discussion Structure characterization of soluble titania xerogel.
According to the literature[23, 24], there are three possible structures of titania xerogle: monodentate, bidentate chelating and bidentate bridging.
Finally, the carboxyl group could bind with each of its oxygen atoms to a TiIV center of the surface yielding the bidentate bridging structure(Scheme1C).
Results and discussion Structure characterization of soluble titania xerogel.
According to the literature[23, 24], there are three possible structures of titania xerogle: monodentate, bidentate chelating and bidentate bridging.
Finally, the carboxyl group could bind with each of its oxygen atoms to a TiIV center of the surface yielding the bidentate bridging structure(Scheme1C).
Online since: August 2019
Authors: Natalia Vyacheslavovna Saienko, Dmitriy Vasilevich Demidov, Yuri Viktorovich Popov, Roman Aleksandrovich Bikov, Basheer Younis, Leonid Vladimirovich Saienko
Therefore, facade coatings to protect the surfaces of buildings should have a structure that does not allow water in the condensed phase, but release it in the gaseous (vapor) state, otherwise it will lead to a decrease in adhesive properties of the coating from the mineral substrate [4, 5].
Currently, for heat insulation of buildings and structures, energy-efficient compositions based on hollow glass and ceramic microspheres are widely used.
Bazhenov, Polymer coatings for concrete and reinforced concrete structures, Saransk, 2010
Kramarenko, Issues of Chemistry and Chemical Technology, 2 (2016) 67-72
Currently, for heat insulation of buildings and structures, energy-efficient compositions based on hollow glass and ceramic microspheres are widely used.
Bazhenov, Polymer coatings for concrete and reinforced concrete structures, Saransk, 2010
Kramarenko, Issues of Chemistry and Chemical Technology, 2 (2016) 67-72
Online since: April 2020
Authors: Yazid Rukmayadi, Yusvardi Yusuf, Mahmud Barizya, Syarif Abdullah, Nufus Kanani, Iman Saefuloh
The specifications of the API 5L pipe follow the standard that standardizes pipeline transportation systems in offshore materials, equipment and structures for the oil [1], petrochemical and natural gas industries.
Micro Structure Analysis of The API 5L Surface Corrosion.
Micro structure with inhibitors 0,25, 0,5, 1, 2, 4% with view a, c, e, g, i 100X magnification and b, d, f, h, j 1000X magnification The Samples without inhibitors experience more corrosion compared to those using inhibitors.
[12] M Mobin, Masarat Parveen et al., Synergistic effect of sodium dodecyl sulfate and cetyltrimethyl ammonium bromide on the corrosion inhibition behavior of l-methionine on mild steel in acidic medium” Arabian Journal of Chemistry 10 (1) (2017) S1364-S1372
Micro Structure Analysis of The API 5L Surface Corrosion.
Micro structure with inhibitors 0,25, 0,5, 1, 2, 4% with view a, c, e, g, i 100X magnification and b, d, f, h, j 1000X magnification The Samples without inhibitors experience more corrosion compared to those using inhibitors.
[12] M Mobin, Masarat Parveen et al., Synergistic effect of sodium dodecyl sulfate and cetyltrimethyl ammonium bromide on the corrosion inhibition behavior of l-methionine on mild steel in acidic medium” Arabian Journal of Chemistry 10 (1) (2017) S1364-S1372
Online since: September 2023
Authors: Mark Keanu James Exconde, Mary Donnabelle L. Balela
Bimetallic alloys may be synthesized by heterogeneous growth, co-reduction, or galvanic replacement, yielding heterostructures, mixed alloys, or core-shell structures [14–19].
Despite the established route for synthesizing 1D Cu-Ag bimetals with core-shell structure, no published studies have primarily focused on the effects of the synthesis parameters that influence the morphology after galvanic replacement.
Zhang, “Preparation and characterization of copper/silver bimetallic nanowires with core-shell structure,” Surface and Interface Analysis, vol. 47, no. 4, pp. 529–534, 2015, doi: 10.1002/sia.5743
Liu et al., “Synthesis of Copper Nanowires via a Complex-Surfactant-Assisted Hydrothermal Reduction Process,” Journal of Physical Chemistry B, vol. 107, no. 46, pp. 12658–12661, 2003, doi: 10.1021/jp036023s
Despite the established route for synthesizing 1D Cu-Ag bimetals with core-shell structure, no published studies have primarily focused on the effects of the synthesis parameters that influence the morphology after galvanic replacement.
Zhang, “Preparation and characterization of copper/silver bimetallic nanowires with core-shell structure,” Surface and Interface Analysis, vol. 47, no. 4, pp. 529–534, 2015, doi: 10.1002/sia.5743
Liu et al., “Synthesis of Copper Nanowires via a Complex-Surfactant-Assisted Hydrothermal Reduction Process,” Journal of Physical Chemistry B, vol. 107, no. 46, pp. 12658–12661, 2003, doi: 10.1021/jp036023s