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Online since: August 2014
Authors: Mihai Alexandru Luca, Teodor Machedon Pisu
A good adhesion appears between the two materials and their hardness is almost the same, approx.630HV.
In the interface area between the two materials, the solid solution’s γ hardness which did not crystallized first and does not have primary carbides, is intermediary between the hardness of the two materials (540-575HV).
One can observe the diffusion in both directions of elements which form the two materials.
Likewise, the friction coefficients determined on materials for deformation tools and on the layer deposited by welding, present very small differences.
Olàh A., Tierean M.H., The possibilities to increase the hardness of welded coating layers, Journal of Optoelectronics and Advanced Materials, Vol.13 ISS.7- 2011, ISSN 1454 - 4164, pg. 852 – 854 [6].
Online since: December 2012
Authors: Lin Yu, Ye Yu Lu, Xiao Feng Jiang
Other related materials such as amorphous organic thin film 8-hydroxyquinoline zinc [9] with the switching properties, 8-hydroxyquinoline and ferrous load MCM-41 catalyst [10] achieved good catalytic results. 8 - hydroxyquinoline metal complexes in the friction is still not reported.
The reason is: the characteristics of the rare earth elements the 4f electronic structure, as exo electron acceptor, while the occurrence of friction between the particles of the metal and rare earth organic salts of the friction surface chemical reaction, rare earth friction generated in the friction surface diffusion layer, protective metal materials , to improve the hardness of the metal friction pair materials, and rare earth elements in the friction interface penetrate to the steel substrate to change the surface crack propagation resistance and surface stress, wear resistance enhanced.
Acknowledgements This work was financially supported by the Guangdong Natural Science Foundation (04205301).
Journal of the Chinese Rare Earth Society,1998,16(4):358.
Chemical Research and Application,Vol.1( 2001),p560 (inChinese) [8] Sugiyama K,Yoshimura D,Miyamac T.Appl Phys Lett,Vol.83(1998),p4928 [9] JunPeng Shi,ZhenChao Wen, ChangAn Song et al. , Journal of Semiconductors ,Vol.26 (2005), p1979 (in Chinese) [10] Chi-biao Liu, Yong-kui Shan,Xiang-guang Yang ,et a1.Journal of Catalysis,Vol.168 (1997),p.35
Online since: October 2012
Authors: Yi Chun Ren, Qiu Kong, Wei Jun Yang, Zhou Ping Yu
Experimental Research on the Change Rule of Frequency of Shale Ceramsite Reinforced Concrete Beam with Damage Weijun Yang1, a, Qiu Kong1, b, Zhouping Yu1, c, Yichun Ren1, d 1Changsha University of Science &Technology, Changsha, Hunan, 410114, China a mgbyrh@163.com , bbnntokq@hotmail.com, c 359458668@qq.com , d 83468487@qq.com Key words: shale ceramic concrete; frequency; damage; experiment Abstract:Taking vibration test on 7 shale ceramsite concrete beams and a reinforced concrete beam, collecting the dynamic signals, and modal analyzing it, this paper studies the ceramsite diameter /strength and the injury at all stages impact on the frequency so as to guide the design and construction of shale ceramsite reinforced concrete structures and components.
The reinforcement, section size, span length and clear span of specimens is shown in Fig.1, the design parameters and materials strength of specimens is shown in Table.1 Figure 1 Test beam reinforcement Table1 Properties of concrete material Specimn number Sectional dimension Coarse aggregate size Cylinder compressive strength (MPa) tensile reinforcement Compression Reinforcement Concrete Cubic Anti-pressure ( MPa) LC-1 100×204×2204 5~16 4.490 214 210 32.13 LC-2 100×205×2200 16~19 4.146 214 210 26.31 LC-3 102×205×2200 19~26 3.644 214 210 20.98 LC-4 100×203×2200 5~16 3.533 214 210 25.20 LC-5 102×206×2200 16~19 2.748 214 210 17.62 LC-6 101×202×2198 5~26 3.332 214 210 23.29 LC-7 103×202×2197 16~26 3.973 214 210 21.00 L-8 101×203×2198 5~19 -- 214 210 35.40 Test Method.
References [1] Yang, Weijun; Yang, Yongda; Yang, Yi.Experimental study on frost resistance of the shale ceramsite concrete .Applied Mechanics and Materials, v 117-119, p 1754-1758, 2012, [2] Yang, Weijun; Wang, Peng.Experimental research on compressive strength-size effect of ceramisite concrete.
Advanced Materials Research, v 382, p 361-367, 2012, [3] P.Cawley,R.D.Adams.The location of defects in structure from Measurements of natural frequencies [J].Journal of Strain Analysis,1979,14(2):49~57 [4] YNarkis.Identification of crack location in vibrating simplysupported beams [J].Journal of Sound and Vibration, 1994,172(4):549~558 [5] Stubbs N.Global Non-destructive Damage Evaluation in Solids[J].International Journal of Analytical and Experimental Modal Analysis, 1990,5(2):67~79 [6] Wu X.Use of Neural Networks in Detectionof Structural Damage[J].Computers and Structures,1992,42(4):649~659 [7] G.Hearn,R.B.Testa.Modal analysis for damage detection in structures.Journal of Structural Engineering.ASCE,1991,117(10): 3042~3063
Online since: August 2019
Authors: Andi Mu'nisa, A. Muflihunna, Rahmawati Rahmawati, Mamat Pratama, Astuti Astuti, Tenri Ayu Adri
There are some factors that not only affect the extracted compounds from plant materials but antioxidant activity as well.
Besides that, solvent used is one of the important factors to extract antioxidant compound in plant materials due to the different antioxidant potential of compound with different polarity.
FRAP assay still can be used for assessment of antioxidant activity in plants materials as humans only absorb limited amount of gluthathione [15].
The Malaysian Journal of Analytical Sciences, 2007,Vol. 11 :269-273
European Journal of Scientific Research, 2009, 28: 471–477
Online since: August 2016
Authors: Weerapol Namboonruang, Prayoon Yongam-Nuai
Concrete mixed with other materials has been studied for a long period.
Moreover, other materials such as: shale using as coarse aggregates to produce the refractory materials[1], slag which can reduce the size changing due to temperature[2], are also developed to use as raw materials.
All materials used in this research were found in Ratchaburi province, Thailand.
Adding more cellulose fiber deteriorate the strength of the materials.
Kapur, Thermal isolation and mechanical properties of fibre reinforced mud bricks as wall materials, Construction and Building Materials, 21 (2007) 901-906
Online since: July 2012
Authors: Hai Yan Chen, Wen Bin Xie, Guo Qing Qiu, Suo Juan Zhang, Xiu Li Qi
This paper integrates the sensing technology, information science, artificial intelligence theory, computer technology and traditional structures safety monitoring theory, gives out a comprehensive system of the Tunnel engineering structure safety monitoring which integrated with the safety of the structure information extraction, comprehensive processing and analysis, structure diagnosis and safety evaluation process.
Accompanying with surrounding environment of the constantly exchange of material, energy, etc, and it has a strong "open" feature; at the same time, the system consists of many of subsystems, such as displacement and deformation, internal static loading and dynamic loading, the load change of the upper portion, the structure stress and strain, the geological environment load, ect, so the tunnel project system is both a giant and complex system[4].
[4] WANG Hao, GE Xiu-run, and DENG Jian-hu, “Study on Management System Of Monitoring Data In Tunnel Excavation,”Chinese Journal ofRockMechanics and Engineering, 2001,10,pp.1684-1686
Online since: July 2011
Authors: Qiang Xia, Rong Kong
Freeze-drying and characterization of Vitamin A Palmitate-loaded Nanostructured Lipid Carriers (NLC) Qiang Xia 1, 2, 3, 4, a, Rong Kong1, 2, 3, b 1 School of Biological Science&Medical Engineering, Southeast University, Nanjing 210096, China 2State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China 3Suzhou Key Laboratory of Biomedical Materials and Technology, Southeast University, Suzhou 215123, China 4Suzhou Nanohealth Biotech Co., Ltd., Suzhou 215123, China axiaq@seu.edu.cn, bkr@seu.edu.cn Keywords: Nanostructured lipid carriers, Vitamin A Palmitate, Cryoprotectants, Lyophilisation, High Pressure Homogenization Abstract.
Materials and Methods Vitamin A Palmitate (1.7 Million IU/g) was provided by Kingdomway (Xiamen, China).
Singh: Trends in Food Science & Technology Vol. 19 (2008), p. 657–668
H., Mader, K., Gohla, S.: European Journal of Pharmaceutics and Biopharmaceutics Vol. 50(2000), p. 161–177
[5] Jenning, V., Gohla, S.: Journal of Microencapsulation Vol. 18 (2001), p. 149–158
Online since: November 2014
Authors: Masanobu Kusunoki, Shigeki Hontsu, Nobuhiro Kato, Ei Yamamoto, Hiroaki Nishikawa, Kazushi Yoshikawa, Arata Isai, Kenzo Yasuo, Kazuyo Yamamoto
Material and methods Dentin disk preparation.
Bartold, “Dentinal hypersensitivity: a review,” Australian Dental Journal 51, (2006) 212-218
Matsumoto, "Treatment of dentine hypersensitivity by lasers: a review," Journal of Clinical Periodontology, vol. 27 (2000) 715-721
Hayami, et al., "Regeneration of Tooth Enamel by Flexible Hydroxyapatite Sheet," Key Engineering Materials vol. 493-494 (2012) 615-619
Matsumoto, "Treatment of dentine hypersensitivity by lasers: a review," Journal of Clinical Periodontology, vol. 27 (2000) 715-721.
Online since: December 2010
Authors: Jian Ming Zhan, Gang Ming Wang, Q.T. Liu
/JOB //NAME sin ///USER 1 ///TOOL 0 ///POSTYPE USER C0000= 44.527, 59.350, 30.649, 90.000, 45.472, 0.0000 C0001= 43.091, 52.983, 37.016, 90.000, 46.909, 0.0000 …… C0019= 0.0000, 19.399, 70.600, 90.000, 90.000, 0.0000 //INST ///DATE 2005/04/25 13:25 ///ATTR SC, RW, RJ ////FRAME USER 1 ///GROUP1 RB 1 NOP MOVL C0000 V=30.0 Acknowledgements Supported by the National Natural Science Foundation of China, ID 50705044, the Natural Science Foundation of Zhejiang Province, China, ID Y1080094.
Key Engineering Materials.Vols.202-203(2001),P73-78
Journal of Minimally Invasive Gynecology, Volume 14, Issue 6, Supplement 1, November-December 2007, P891
The Journal of Urology, Volume 168, Issue 3, September 2002, Pages 945-949
Journal of Materials Processing Technology,129 (2002) ,P186-189.
Online since: September 2011
Authors: Kai Wu, Ai Jun Jiang
Stability Analysis for the Milling of Lateral Walls Jiang Aijun, Wu Kai School of Mechanical Engineering Nanjing University of Science and Technology Nanjing, Jiangsu Province, China aijun_124@sina.com, wukai@mail.njust.edu.cn.
References [1] Altintas Y, Budak E, “Analytical Predication of Stability Lobes in Milling,” Annals of the CIRP, vol.44, no.1, pp. 357-362, 1995 [2] Altintas Y, “Analytical Prediction of Three Dimensional Chatter Stability in Milling”, JSME International Journal, Series C, vol.44 , no.3,pp.717-723, 2001 [3] Sebastien Segu, et al, “Toolpath dependent stability lobes for the milling of thin-walled parts,” Int.J.Machining and Machinability of Materials,vol.4,no.4,pp. 377-392,2008 [4] Budak E, Tekeli A, “Maximizing chatter free material removal rate in milling through optimal selection of axial and radial depth of cut pairs,” CIRP Annals Manuf acturing Technology, vol.54,no.1,pp.353-356,2005 [5] Aijun Tang, Zhanqiang Liu, “Three-dimensional stability lobe and maximum material removal rate in end milling of thin-walled plate,” IntJ Adv Manuf Technol,vol.43,pp. 33-39,2009 [6] Aijun Tang, Zhanqiang Liu, “Effect of milling cutter parameters on milling stability of thin-wall parts,” Journal
of South China University of Technology Natural Science Edition,vol.37, no.2, pp.29-33, February 2009 [7] Aijun Tang, Zhanqiang Liu, “Modeling and simulation of three-dimensional stability lobes of milling thin-walled plate,” Proceedings of the IEEE International Conference on Automation and Logistics Qingdao, China ,pp.532-535,September 2008 [8] U.
Bravo, O.Altuzarra,L.N.Lopez de Lacalle, “Stability limits of milling considering the flexibility of the workpiece and the machine,” International Journal of Machine Tools & Manufacture,vol.45,pp. 1669-1680,2005