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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
Furthermore, the biosciences are
increasingly confronted with minute amounts of this material obtained from natural or biological
systems.
Synthesis of Trisaccharides UDP-galactose + aminosugar containing isomeric disaccharide(new donor) Gal(β1-3)GalNAc Gal(β1-3)GlcNAc Gal(β1-4)GlcNAc Gal(β1-6)GlcNAc ----- → isomeric trisaccharide (new linkage-isomeric oligosaccharide) Gal(β1-4)Gal(β1-3)GalNAc Gal(β1-4)Gal(β1-3)GlcNAc Gal(β1-4)Gal(β1-4)GlcNAc Gal(β1-4)Gal(β1-6)GlcNAc Title of Publication (to be inserted by the publisher) Experimental Section Materials.
In contrast, the NMR method requires a relatively large sample amount (mg level) for a structural analysis, which is the weak point of this analytical method as regards biological samples, while mass spectrometry requires small sample amounts (µg level) and provides a unique method for investigating the type, number of sugar constituents, sequence, and sugar composition of molecular ions, as well as key fragments.
This work was supported by the Korea Science and Engineering Foundation (R04-2002-000-20042-0).
Synthesis of Trisaccharides UDP-galactose + aminosugar containing isomeric disaccharide(new donor) Gal(β1-3)GalNAc Gal(β1-3)GlcNAc Gal(β1-4)GlcNAc Gal(β1-6)GlcNAc ----- → isomeric trisaccharide (new linkage-isomeric oligosaccharide) Gal(β1-4)Gal(β1-3)GalNAc Gal(β1-4)Gal(β1-3)GlcNAc Gal(β1-4)Gal(β1-4)GlcNAc Gal(β1-4)Gal(β1-6)GlcNAc Title of Publication (to be inserted by the publisher) Experimental Section Materials.
In contrast, the NMR method requires a relatively large sample amount (mg level) for a structural analysis, which is the weak point of this analytical method as regards biological samples, while mass spectrometry requires small sample amounts (µg level) and provides a unique method for investigating the type, number of sugar constituents, sequence, and sugar composition of molecular ions, as well as key fragments.
This work was supported by the Korea Science and Engineering Foundation (R04-2002-000-20042-0).
Online since: September 2011
Authors: Xiao Hua Yang, Chao Yang Zhou, Xue Jun He, Teng Chen
Research on post-tensioned unbonded prestressed concrete hollowed floor
Xiaohua Yang1,2,a,Chaoyang Zhou2,b,Xuejun He2,c,Teng Chen1,d
1 Schools of Civil Enginerring, Hunan University of Technology, Zhuzhou 412008, China
2 Schools of Civil Enginerring ,Central South University, Changsha 410075, China
ayangsheep@126.com, bjoezycn@163.com, cjunxuehe@126.com, dchenteng@126.com
Key words: post-tensioned unbonded prestressed concrete hollowed floor; slab-column structure; mechanical behaviors.
Therefore, in same conditions of spans, sections and materials, the deflections of flat beams in direction vertical to layout of tubes should be more than that in direction parallel to layout of tubes, and the twisting angles in direction vertical to layout of tubes should also greater than that in direction parallel to layout of tubes.
The geometry sizes of finite element model, properties of material and applied loads are exactly the same as test model.
Through above analysis, the reinforcement of hollowed floor in X direction should be attention to in engineering applications.
Therefore, in same conditions of spans, sections and materials, the deflections of flat beams in direction vertical to layout of tubes should be more than that in direction parallel to layout of tubes, and the twisting angles in direction vertical to layout of tubes should also greater than that in direction parallel to layout of tubes.
The geometry sizes of finite element model, properties of material and applied loads are exactly the same as test model.
Through above analysis, the reinforcement of hollowed floor in X direction should be attention to in engineering applications.
Online since: October 2013
Authors: Pavel Hazdra, Jan Vobecký, Vít Záhlava
Point Defects in 4H-SiC Epilayers Introduced by 4.5 MeV Electron Irradiation and Their Effect on Power JBS SiC Diode Characteristics
Pavel Hazdra1,a, Vít Záhlava1,b and Jan Vobecký1,2,c
1Department of Microelectronics, Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, CZ-16627 Prague 6, Czech Republic
2ABB Switzerland Ltd., Semiconductors, Fabrikstrasse 3, CH-5600 Lenzburg, Switzerland
ahazdra@fel.cvut.cz (corresponding author), bzahlava@fel.cvut.cz, cjan.vobecky@ch.abb.com
Keywords: silicon carbide, radiation defects, electron irradiation, power diode
Abstract.
Introduction Outstanding properties of SiC (wide bandgap, high electric and mechanical strength, high thermal conductivity and stability, and high radiation resistance) make this material suitable for fabrication of high-power and high-frequency devices or electronics operating at high temperatures and radiation levels.
Only the recent improvements in SiC material allowed for its industrial application.
Point defects generated by radiation are then of key importance since they are produced both during device processing (ion implantation) and device operation (by cosmic rays).
The dominant peak EA1 was identified as the Z1/Z2 electron trap attributed to an intrinsic acceptorlike defect which appears at low concentrations in as-grown material and is enhanced by irradiation [7].
Introduction Outstanding properties of SiC (wide bandgap, high electric and mechanical strength, high thermal conductivity and stability, and high radiation resistance) make this material suitable for fabrication of high-power and high-frequency devices or electronics operating at high temperatures and radiation levels.
Only the recent improvements in SiC material allowed for its industrial application.
Point defects generated by radiation are then of key importance since they are produced both during device processing (ion implantation) and device operation (by cosmic rays).
The dominant peak EA1 was identified as the Z1/Z2 electron trap attributed to an intrinsic acceptorlike defect which appears at low concentrations in as-grown material and is enhanced by irradiation [7].
Online since: July 2011
Authors: Long Zheng Tong, Yun Yun Duan, Bo Wu, Ling Jing Hu
Comparison of the unified segmentation method and the new segmentation method on detection of grey matter and white matter changes in Alzheimer’s disease based on Voxel-based morphometry
Lingjing Hu1,a, Longzheng Tong1,b, Yunyun Duan2,c, Wu bo1,d
1Department of Biomedical Engineering, Capital Medical University, Beijing, China
2Department of Radiology, Xuanwu Hospital, Beijing, China
aHulingjing@gmail.com, bTlz823@126.com, cYun.duan81@gmail.com, dWubogo@gmail.com
Keywords: Alzheimer’s disease, White matter, Gray matter, Voxel-based morphometry
Abstract.
Although the diagnosis can be confirmed with high accuracy post-mortem when the available brain material can accept histopathological examination [2], it is difficult to clinically diagnose the early AD in vivo through the patient history, collateral history from relatives, and clinical observations, based on the presence of characteristic neurological and neuropsychological features and the absence of alternative conditions [3, 4].
Materials and methods Subjects.
Tissue Type UNI-Seg mean (SD, CV) New-Seg mean (SD, CV) p-value AD GM 480.2 (48.2, 0.10) 628.6 (55.1, 0.03) <0.001 WM 373.9 (52.9, 0.14) 454.8 (47.9, 0.11) <0.001 CSF 656.8 (78.4, 0.12) 324.4 (25.8, 0.08) <0.001 HC GM 640.4 (249.3, 0.39) 641.8 (46.5, 0.07) NS WM 643.9 (34.3, 0.05) 475.5 (33.9, 0.07) =0.005 CSF 532.9 (71.4, 0.13) 304.5 (28.3, 0.09) <0.001 Key: UNI-Seg, Unified segmentation; New-Seg, New segmentation.
Although the diagnosis can be confirmed with high accuracy post-mortem when the available brain material can accept histopathological examination [2], it is difficult to clinically diagnose the early AD in vivo through the patient history, collateral history from relatives, and clinical observations, based on the presence of characteristic neurological and neuropsychological features and the absence of alternative conditions [3, 4].
Materials and methods Subjects.
Tissue Type UNI-Seg mean (SD, CV) New-Seg mean (SD, CV) p-value AD GM 480.2 (48.2, 0.10) 628.6 (55.1, 0.03) <0.001 WM 373.9 (52.9, 0.14) 454.8 (47.9, 0.11) <0.001 CSF 656.8 (78.4, 0.12) 324.4 (25.8, 0.08) <0.001 HC GM 640.4 (249.3, 0.39) 641.8 (46.5, 0.07) NS WM 643.9 (34.3, 0.05) 475.5 (33.9, 0.07) =0.005 CSF 532.9 (71.4, 0.13) 304.5 (28.3, 0.09) <0.001 Key: UNI-Seg, Unified segmentation; New-Seg, New segmentation.
Online since: September 2013
Authors: Yan Ni Li, Xiao Yan Zhu, Wei Li Wang, Jing Lan Wang, Zhi Rong Wang
Experimental Study on Oil-degradation Microbial Consortium from Oil-contaminated Soil by Different Enrichment and Domestication
Zhirong Wang1, a, Yanni Li2,b, Xiaoyan Zhu3,c, Weili Wang3,c, Jinglan Wang3,c
1.2.3College of Environmental Science and Safety Engineering, Tianjin University of Technology,
Tianjin, 300384, China
awangzr@tjut.edu.cn,bliyanni_jy@163.com, czhuxiaoyanjjj@126.com,
c415606341@qq.com,cmaolan2008_123@126.com.
Key words: Oil, Microbial consortium, Enrichment and domestication, Soil Abstract.
It is easier for bacterial consortiums to adapt the adverse environments; so allows bacterial consortiums to make extensive use of natural or artificial material as its energy source as well as synthesis of necessary components [8].
Materials and Methods Crude Oil and Oil-contaminated Soil.
Key words: Oil, Microbial consortium, Enrichment and domestication, Soil Abstract.
It is easier for bacterial consortiums to adapt the adverse environments; so allows bacterial consortiums to make extensive use of natural or artificial material as its energy source as well as synthesis of necessary components [8].
Materials and Methods Crude Oil and Oil-contaminated Soil.
Online since: December 2014
Authors: Tobias Müller, Thorsten Schmidt, Stefan Weigelt, Ludger Overmeyer
Due the increasing use of electronics in control elements to raise energy efficiency and ease of use, the electronic components have nowadays become a key factor in the consistency of the overall forklift truck system.
It describes the grade of rigidity for constant life time between the fatigue strength and the fatigue strength under dynamic stresses, is a material dependent quantity and is by definition in the range between 0 and 1.
However, due to the inherent material diversity, a single M factor describing an electronic component is hard to define.
The investigations for the control levers of the reach truck create failure characteristic curves similar to the wöhler-curve, which is familiar from material engineering [3], as shown figure 7.
It describes the grade of rigidity for constant life time between the fatigue strength and the fatigue strength under dynamic stresses, is a material dependent quantity and is by definition in the range between 0 and 1.
However, due to the inherent material diversity, a single M factor describing an electronic component is hard to define.
The investigations for the control levers of the reach truck create failure characteristic curves similar to the wöhler-curve, which is familiar from material engineering [3], as shown figure 7.
Online since: May 2011
Authors: Yu Heng Wang, Yu Heng Wang, Xiu Yan Zhou, Na Li
Improvement of High Algae-laden Water Treatment by
Coagulation Aid of Chitosan
Yuheng Wang, Shengguang Zhuo, Xiuyan Zhou, Na Li
Department of Environmental Science and Engineering, Northeastern University at Qinhuangdao,
Qinhuangdao, 066004, China
85916147@qq.com
Key words: chitosan; aluminium sulphate (AS); coagulation aid; coagulation/flocculation/ sedimentation (C/F/S); floc settleability; floc structure
Abstract.
Introduction Coagulation/flocculation method is a widely applied process in water supply engineering and wastewater treatments for its capability to remove suspended particles and colloidal impurities economically and efficiently.
Materials and Methods Raw Water.
Introduction Coagulation/flocculation method is a widely applied process in water supply engineering and wastewater treatments for its capability to remove suspended particles and colloidal impurities economically and efficiently.
Materials and Methods Raw Water.
Online since: April 2012
Authors: Xian Li Liu, Geng Huang He, Zhong Guang Yu, Ji Jun Zhang
The Design and Simulation of Main Tool Carrier System in a Condition of Large Vertical Lathe
Jijun Zhang1, 2 a, Xianli Liu2 b, Genghuang He2 c, Zhongguang Yu2 d
1 Engineering College, Heilongjiang Bayi Agricultural University, Da Qing, 163319, China
2 The key Lab of Advanced Manufacturing Tech. & Cutting Tools, Harbin Univ. of Sci. and Tech, Harbin, 150080, P.
Tool overhang is 130mm Figure 4 represent the finite element model for the tool carrier system, meshing conditions and material parameters shown in Table 2.
Fig.4 Finite element model Fig.5 Constraints and load diagram Table 2 Meshing conditions and material parameters of tool carrier system Name Elements Nodes Density [kg/m3] Elastic modulus [Pa] sliding plate 8142 13124 7350 1.56e11 Ram 46536 68665 7800 1.92e11 Blade 4771 7650 11000 5.3e11 Cutter pad 321 667 11000 5.3e11 Cutter body 1029 1787 7820 2.117e11 Cutter screw 286 571 7850 2.06e11 Tool compress block 636 1279 7820 2.1e11 Column screw 488 905 7850 2.06e11 Figure 6 shows the the deformation cloud diagram of the tool carrier, getting the maximum deformation is 0.2753mm, maximum deformation concentrated in the cutting area of the tool, Figure 7 shows the stress distribution cloud diagram, maximum stress is 987.42Mpa, maximum stress also concentrated in the cutting area of the tool, ram and sliding plate are under a small stress.
Solov'ev and Allah Abdullah: Russian Engineering Research, Vol. 28(2008) No.5, pp.493-494.
Tool overhang is 130mm Figure 4 represent the finite element model for the tool carrier system, meshing conditions and material parameters shown in Table 2.
Fig.4 Finite element model Fig.5 Constraints and load diagram Table 2 Meshing conditions and material parameters of tool carrier system Name Elements Nodes Density [kg/m3] Elastic modulus [Pa] sliding plate 8142 13124 7350 1.56e11 Ram 46536 68665 7800 1.92e11 Blade 4771 7650 11000 5.3e11 Cutter pad 321 667 11000 5.3e11 Cutter body 1029 1787 7820 2.117e11 Cutter screw 286 571 7850 2.06e11 Tool compress block 636 1279 7820 2.1e11 Column screw 488 905 7850 2.06e11 Figure 6 shows the the deformation cloud diagram of the tool carrier, getting the maximum deformation is 0.2753mm, maximum deformation concentrated in the cutting area of the tool, Figure 7 shows the stress distribution cloud diagram, maximum stress is 987.42Mpa, maximum stress also concentrated in the cutting area of the tool, ram and sliding plate are under a small stress.
Solov'ev and Allah Abdullah: Russian Engineering Research, Vol. 28(2008) No.5, pp.493-494.
Online since: September 2016
Authors: Ye Wang, Mao Liang Hu, Hai Bo Wang, Sumio Sugiyama, Hong Yu Xu, Ze Sheng Ji
Effect of Chip Size on Semi-Solid Microstructure of AZ91D Magnesium Alloy Prepared by CRP Process
XU Hong-Yu1, a *, JI Ze-Sheng1, b, WANG Ye1, c, HU Mao-Liang1, d,
WANG Hai-Bo2, e and Sugiyama Sumio1, 3, f
1School of Material Science and Engineering, Harbin University of Science and Technology,
Harbin 150040, China
2School of Architecture and Civil Engineering, Harbin University of Science and Technology,
Harbin 150080, China
3Institute of Industrial Science, the University of Tokyo, 153-8505, Japan
axuhongyu@hrbust.edu.cn, bjizesheng@hrbust.edu.cn, cwangye@hrbust.edu.cn, dhumaoliang@hrbust.edu.cn, ewanghaibo@hrbust.edu.cn, f516501185@qq.com,
Keywords: CRP process, chip thickness, deformation coefficient uniformity, compactness, oxygen content oxidation, semi-solid microstructure.
The required feedstock for semi-solid forming have excellent characteristic of nondendritic or spherical organization, so preparation of semi-solid billet is the key step [2, 3].
In this paper, different kinds of AZ91D magnesium alloy chips are recycled to produce semi-solid billet via CRP process and the microstructures of these billets were investigated. 2 Experimental In the present study, commercial AZ91D magnesium alloy cast ingot with a nominal composition (wt. %) of 8.96Al, 0.68Zn, 0.20Mn and Mg-balance was used as experimental material.
The required feedstock for semi-solid forming have excellent characteristic of nondendritic or spherical organization, so preparation of semi-solid billet is the key step [2, 3].
In this paper, different kinds of AZ91D magnesium alloy chips are recycled to produce semi-solid billet via CRP process and the microstructures of these billets were investigated. 2 Experimental In the present study, commercial AZ91D magnesium alloy cast ingot with a nominal composition (wt. %) of 8.96Al, 0.68Zn, 0.20Mn and Mg-balance was used as experimental material.
Online since: November 2013
Authors: Da Yi Li, Qiu Zhan Zhou, Yu Jiang Wang
College of communication engineering, Jilin University, Changchun, 130022, China
2.
The key task of MES’s design is modeling and optimizing electrodes configurations with numerical methods to reduce the self-noise in order to improve its output characteristic.
Ogden model is employed: (2) (3) Where and are material constant, λi is main extension ratio, is the train energy density function with time t, which can produce Cauchy stress tensor at time t with the following steps: First, calculating Kirchhoff stress with : (4) Where is the second Piola-Kirchhoff stress tensor at time t, is Green stress tensor at time t
(5) The relationship between Cauchy stress and Kirchhoff stress is: (6) Where is spatial coordinate, is material coordinate, J is Jacobi determinant
Zarins, “Finite element modeling of blood flow in arteries,” Computer methods in applied mechanics and engineering, vol. 158, no. 1, pp. 155-196, 1998
The key task of MES’s design is modeling and optimizing electrodes configurations with numerical methods to reduce the self-noise in order to improve its output characteristic.
Ogden model is employed: (2) (3) Where and are material constant, λi is main extension ratio, is the train energy density function with time t, which can produce Cauchy stress tensor at time t with the following steps: First, calculating Kirchhoff stress with : (4) Where is the second Piola-Kirchhoff stress tensor at time t, is Green stress tensor at time t
(5) The relationship between Cauchy stress and Kirchhoff stress is: (6) Where is spatial coordinate, is material coordinate, J is Jacobi determinant
Zarins, “Finite element modeling of blood flow in arteries,” Computer methods in applied mechanics and engineering, vol. 158, no. 1, pp. 155-196, 1998