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Synthesis and characterization of polyesters containing 5-fluorouracil in the main chain Jun Chang*, Cheng wu Lib, Gang Li c School of material science&engineering, Shenyang Ligong University, Shenyang, 110159, China *changjun_9450@yahoo.com.cn, blichwu789@163.com, cligang33@hotmail.com Keywords: 5-Fluorouracil; Polyester; Polymeric prodrug ; Antineoplastic drug Abstract.
Recent years, an attempt to use crude or synthesis material as carrier of 5- FU has been developed[1][2].
Experimental Materials 2-chloroaehanol, 3-chloro-1-propanol and 4-chloro-1-butanol was commercial grade reagents and used without further purification. 5-FU was re-crystal with water, dry in vacuum, m.p.281℃.
Journal of Functional Polymer.,2003，16（6）：191～196
Chemical Journal of Chinese Universities.,1996，17（9）：1416～1420

Materials The LY12 alloy was employed, its composition is shown in Table 1.
[5] Kurze, P. submitted to Material wissen schaft und Werkstoff technik. 1998, 29(2): 85
[6] Jianmin Hao, Hong Chen: submitted to The Chinese Journal of Nonferrous Metal,2003,13（4）: 988～991.
（In Chinese） [8] Hong Chen, Zhongxu Feng, Jianmin Hao, Bo Li: submitted to Journal of Chang’an University (Natural Science Edition). 2007,27（1）：96～98.
（In Chinese） [9] Hong Chen, Jianmin Hao: submitted to Materials Protection. 2007,40(9):17～18.

By the reference [4,5], the thickness more than 6mm ,reflectivity reaches -20dB[6] .It has a big influence on signal,whose transmission cannot be completed.While the glass on the train is glass steel, a new type of composite material, 5+9A+5 hollow toughened glass.
Theoretical analysis and calculation for the communication is carried on.Application of plane electromagnetic wave theory and fresnel formula, analyze the characteristic of transmission loss and features of the interface reflection and transmission when electromagnetic wave is in different material.
Journal of Science Vol.3(2000),p. 251-259
[5] Yike Xu ,Chunying Shen ,Yongbao Feng ,et al: Preparation and properties of Al and Si alloy in absorbing the wave material.materials for mechanical engineering .Vol.2(2009),p.71-77
[9]Yunliang Long, Ming Huang,Xingwei Wang,Yong Wang:Journal of Zhongshan University(2001)

The structural performance of the SM is well known in terms of not only material behavior, but structural behavior such as local buckling and design actions by external forces.
Therefore, it is almost impossible for a fire engineer to support the fire performance of H-section according to joint systems and materials applied.
Lamalva, Thermal response of steel structures to fire: test versus field conditions, Journal of Fire Protetion Engineering, 21(2011) pp.285-299
[2] In-Kyu Kwon, A study of the properties of SM 400 for evaluation of structural stability at high temperature, Journal of Korean Institute of Fire Science and Engineering, 4(2013) pp. 1-7
[3] Korean Standard Association, KS B 0802, Method of tensile test for metallic materials, Seoul, Korea(2003)

Optimization of Heat Transfer Design for High Quality 4H-SiC Ingot Growth Seung Jun Lee1,a, Su Ho Kim1,b, Chae Young Lee1,c, Jong Hwi Park1,d, Jung Woo Choi1,e, Hyong Suk Lee1,f, Jung Gyu Kim1,g, Kap Ryeol Ku1,h, Min Kyu Kang2,i and Won Jae Lee2,j* 1Senic, 17-15, 4sandan 7-ro, Jiksan-eup, Seobuk-gu, Cheonan-si, Chungcheongnam-do, Korea 2Department of Advanced Materials Engineering, Dong-Eui University, 176, Eomgwang-ro, Busanjin-gu, Busan, Korea asjlee@senic.co.kr, bshkim@senic.co.kr, ccylee@senic.co.kr, djhpark@senic.co.kr, ejwchoi@senic.co.kr, fhslee@senic.co.kr, gjgkim@senic.co.kr, hkrku@senic.co.kr, ikminq980@gmail.com, jleewj@deu.ac.kr Keywords: Optimizing Heat Transfer, Physical Vapor Transport (PVT), Temperature Gradient, Polytype Stabilization, Hot Zone Abstract.
Balkas, Bulk growth of large area SiC crystals, Materials Science Forum 858 (2016) 5-10
Aspalli, SiC : an advanced semiconductor material for power devices, IJRET, Vol. 3 (2014) 248-252
Wellmann, Influence of the growth interface shape on the defect characteristics in the facet region of 4H-SiC single crystals, Journal of Crystal Growth 532 (2020) 125436
Winnacker, Effect increase of single-crystalline yield during PVT growth of SiC by tailoring of temperature gradient, Journal of Crystal Growth 262 (2004) 105-112.

These factors include the parallel capacitance of the converter, depositing dielectric materials on the sidewalls of the converter fingers and increasing the thickness of the converter moving plate.
Finally the effect of combining both increasing the device thickness and depositing dielectric materials on the output power will be explained.
Increasing The Output Power By Depositing Dielectric Materials On The Sidewalls of The Converter Fingers In order to increase the output power, Cpar must increase and α must decrease.
Thus one can conclude that depositing dielectric materials on the sidewalls of the converter fingers increases its output power as it increases its maximum capacitance.
International Journal of Distributed Systems & Networks” vol. 4, no.3, 2001

Therefore, depending from the indications we can decide between different materials, preparation designs and veneers.
A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces.
Advances in dental veneers: materials, applications, and techniques.
Ceramic materials in dentistry: historical evolution and current practice.
Journal of Dentistry 28 (2000) 163–177

Welding distortion is a partial plastic deformation from internal stresses caused by non-uniform temperature fields on metal components in welding reach the material yield limit.
All of the above will cause great difficulties for site installation, and will also cost a lot of manpower and material resources to deal with welding distortion once the tolerance occurs.
References [1] Wang Zhenyi, Ma Hongchen, Factors and Measures for Common Welding Distortions, Theoretical Science 2010,1674-6708（2010）17-0056-02.
(In Chinese) [3] Zeng Zhibin, Shi Zhiqiang, Shi Yongjie, Experiments and Researches on Welding Distortions at Butt Joints in Large Thick Steel Panels, China Railway Science, 2009,1001-4632(2009)03-0033-07.
[9] Ueda Y.Ma N X.Expression of inherent strain in form of function and its estimation[J].Journal of the Japan wleding society,1993,11(1):189-198

Acknowledgements This project was supported by National Nature Science Foundation (NO.60879002) and Tianjin Key Technology R&D Program (No.10ZCK FGX03800) Reference [1] G..
Li: Journal of Aerospace power, Vol.24(2009)No.10, p.2277 (in Chinese)
Wen: Journal of Vibration Engineering. 2009, Vol.22(2009)No.2, p.134 (in Chinese)
Zhu and Z.G Liu: Journal of Xi'An Jiaotong University.
Zhang: Chinese Journal of Applied Mechanics, Vol.20(2003)No.4, p.61.

These membranes require the following list of specifications: · negligible permeability to liquids · high permeability to vapor · high porosity · hydrophobicity · low thermal conductivity · high resistance to chemical attacks and deposits · sufficient mechanical resistance Membrane technology has evolved and today a series of materials has these properties: polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or Teflon, polyacrylonitrile (PAN) [8] as well as polypropylene (PP) and polyethylene (PE) [6-7].
In: Climate Change 2013: The Physical Science Basis.
Lior, Transport analysis of air-gap membrane distillation, Journal of Membrane Science 255 (2005) 239-253
Lenat, Modelling and simulation of a heat pump for simultaneous heating and cooling, Building Simulation: An International Journal 5 (2012) 219–232
Miriel, Scroll compressor modelling for heat pumps using hydrocarbons as refrigerants, International Journal of Refrigeration, International Journal of Refrigeration 41 (2014) 1-13