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The major issue of concern is biocompatibility and safety of these materials and their fate after in-vivo use.
Nanotechnology is the study of materials that lie at the interface of bulk matter and individual atoms and molecules.
Nanobiotechnology is the application of these novel materials to biology.
Liposomes are rapidly cleared from circulation by Kuppfer cells of liver so their surfaces are usually modified with materials to give them stealth properties as mentioned earlier.
Murray: The FASEB Journal Vol. 19 (2005), p. 331

Numerical Simulation and Technology Optimization of rear Oil Seal Bearing Die Castings Based on ProCAST Yi Dong 1,2, a, Xiaoming Fan 2,b and Bin Liu 3,c 1 Guangzhou Auto College,South China University of Technology, Guangzhou 510800, P R China 2 School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070, P R China 3 Dongfeng (Shiyan) Nonferrous Casting Co.
Introduction of the rear oil seal bearing parts Part structure and technical requirements The rear oil seal bearing is an engine parts, material is AS9U3 aluminum alloy, weighs approximately 0.196kg,the maximum dimensions is about 154mm × 126mm × 11mm, annual output is more than 150 thousand.
Aiming at the actual condition of the part, the technical personnel strived to take technological breakthrough many times in the long production process, tried to make measures from the alloy material, die-casting machines, die casting process, mold, etc.
According to die casting parameters, in PRECAST module, the boundary conditions, including virtual die, material parameters, heat transfer parameters, movement parameters, initial conditions and operating parameters were set.
Application of Numerical Simulation Technology in Foundry Process[J].Journal of dalian jiaotong university,2009,30(4):31-33,38

Bamboo pulp fibers have good antibacterial effect, the fabric made by bamboo pulp fibers will not lose antibacterial effect after repeated washing and sunshine, and bamboo pulp fibers are good raw materials of carpets.
Table 1 Combustion properties of tufted carpet samples No. bamboo pulp/cotton blending ratio sample size/cm average length of damage / mm average smoldering time/s 1 40:60 10×2 54 2 2 50:50 42 1 3 60:40 61 3 These show that tufted carpet samples have better combustion properties when the bamboo pulp/cotton blending ratio are 50:50 and 40:60,they are as the main raw material of tufted carpets.
Table 8 The antimite effect bamboo pulp/cotton blending ratio aversion ratio of mariquita/% 50:50 77.36 40:60 78.90 detection of flame retardant effect According to GB/T 8624-2006, Classification for burning behavior of building materials and products, GB/T11785-2005, Reaction to fire tests for floorings—Determination of the burning behaviour using a radiant heat source, GB/T8626-2007,Test method of flammability for building marerials.
[4] HE Fang,ZHOU Jing-yi.Research of wet comfort plain fabric[J].Journal of Tianjin Polytechnic University,2011,30（1）:32-35 [5] JIANG Li-yun, WU Wei-min, SUN Qing.
Shanghai Textile Science & Technology,2006,34（12）:62-63

At last, the materials used for test cut (for example: nylon, wood, engineering plastic) are cheaper than metal.
Table 1 The selection of main components Parts Name Model Size Power Material Spindle Motor TH27JB520 Φ36.5x50.5 5W Linear Guide MGN9 wide9mm HSS(quenching) Ball Screw NSK1204/THK1405 D=14/12 HSS(quenching) Chuck K01-50 maximum machining d=40mm Bearing S6804ZZ/S6812ZZ 20/72（internal diameter） Bearing steels Fig.4 The diagram of control board interface Fig.5 The interface diagram of micro-switch and card The design of control system Introduction of Mach3.
This model can cut softer materials, and at the same time ensure the limiting accuracy.
Acknowledgment The authors gratefully acknowledge the financial support provided under the Tianjin University of technology and education science and research Funds (No.
Designing and Refitting Practice on Numerical Control Lathe of Economical Model, Journal of Zhejiang Vocational and Technical Institute of Transportation, 2003,4(1) : 24～26 [7] Jiang Zhifang.

Influence of Polyols as a Co-stabilizer on Stabilization Efficiency of Calcium/Zinc Stabilizers to PVC Jungang Gaoa, Xiaoqian Liub, Jianbo Yangc, Fengli Zhud College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China agaojg@hbu.edu.cn, b lxqeml@163.com, c yjb1222@126.com, dZhufengli-22@163.com Keywords: polyvinyl chloride, polyols, calcium/zinc stabilizer, rheological behavior Abstract.
Experimental Materials: Polyvinyl chloride (DG-1000K) was supplied by Dagu Chemical Co.
Dynamic Mechanical Properties of PVC containing Polyols Because the glass transition temperature (Tg) can be used effectively to monitor the molecular motion, the DMA method can be used to determine the Tg of polymeric materials.
The higher Tp, the higher Tg is, which depends upon the molecular structure and material properties.
Liu: Chinese Journal of Synthetic Chem, No.15 (6), 768-770 (2007) [2]Y.C.

The density of material is ρ=7800 kg/m3, and the specific heat is c= 460 J·kg -1·K -1.
When the temperature reaches the critical value of the gear material, the gluing failure of spiral bevel gears appears.
Acknowledgement This research is subsidized by the National Science and Technology Major Project of China under grant No. 2009ZX04014-014.
Yang et al: Applied Mechanics and Materials Vol. 16-19(2009), p. 254 [5] Z.Q.
Chen, et al: Journal of Aerospace Power Vol. 14(1999), p. 309 [6] Y.Z.

Design and Finite Element Analysis on Crown Gear Coupling of High Torque Considering Radial Restriction Ping WANGa, Zhijun ZHENGb, June ZHANGc College of Mechanical Engineering, Tianjin University of Science & Technology, Tianjin 300222, China awp2004@tust.edu.cn, bzhengzj162@163.com, czhangjune06@126.com Keywords: radial restriction, high torque, crown gear coupling, design, finite element analysis.
After the 3-dimensional solid model is imported into software ANSYS 11.0, firstly to define element type (here are solid 45), define material properties; and then mesh the model, the finite element models of the crown gear and a bolt are established by use of Free Mesh.
Then make contact settings, the contacts between the crown gear and the inner gear, flat keys and the sleeve, flat keys and shafts connected are defined by the use of Target 170 and Contact 174, which are all non-linear contacts, the friction coefficient is 0.2, contact rigidity is Young’s modulus of the materials.
Table 1 Comparison of calculated results and analytical results Materials used Admissible stress /MPa Theoretical results /MPa Analytical results /MPa Crown gear 42CrMo (Surface hardening) 255 239 138.2 Inner gear 42CrMo (Modified treatment) 205 199 85.2 Flat key 45 120 109 116.1 Conn. bolt 40Cr 314 245.6 268.3 It can be seen that the results of theoretical calculated and analytical are both less than the admissible stress.
Yi: Journal of Shanghai University Vol. 9, 6(2005), p. 527 [2] C.

Introduction Prepreg composite forming is an important concern in the manufacturing of high performance composite material products.
In addition the composites with thermoplastic matrix are more easily recyclable than thermoset material..
(6) Where {u} is the vector of displacement degrees of freedom, { }is the material co-ordinate vector, [M] is the mass matrix, and are internal and external loads vectors of the system, is Lagrange multiplier vector and its components are slave nodal contact forces, is an index of calculation step, [G] is a surface contact displacement constraint matrix.
Journal of Materials Science 41:6725-6736 [25] Carpenter Nicholas J, Taylor Robert L, Katona Michael G.

The Effect of Ni-P alloy Pre-Plating on the Performance of Ni-P /Ni-P-PTFE Composite Coatings Junying Houa, Songrui Wangb, Zhiwei Zhouc Shandong Provincial Key Laboratory of Polymer Material Advanced Manufacturing Technology，Qingdao University of Science and Technology, Qingdao 266061, P.
Experiment process Sample material are a number of 40mm × 40mm × 2mm galvanized iron, which using conventional methods deoiling, derusting, activating,then, put them into the groove, after some time of plating, so that the plating surface firmly deposited a layer that combined with substrate is good, durable and reliable coating.Composition and process conditions of composite plating bath: chemical plating Ni-P base solution,appropriate amount of PTFE particles,appropriate amount of surfactants.
Material Protection,1997(3):1-3 [2] Zhang Yong Zhong,Sun Ke Ning,Yao Mei.
Process and performance of electroless plating Ni-P-PTFE [J] Functional Materials,1999(1):88-90 [3] Wu Ya Ting,Liu Lei,Gao Jia Qiang.Process and coating performance of the self-- lubrication Ni-P-PTFE electroless composite plating.
Journal of Shanghai Jiaotong University,2005(2):206-210

The changes of operating patterns bring more flows about material, energy, and information among nodes in weapon equipment system.
Specifically, the relationships between different equipments reflect the flows of the ability, materials and information.
While the information flows usually is the precondition of the one of ability and materials.
Journal of Department of Equipment Command and Administration ,Vol.26(2012): p5-9 [3] Y.
Science management Research, Vol.14(2005): p148-150 [6] J.