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Introduction In order to reduce the environmental pollution caused by polymer materials wastes, biodegradable polymers, such as starch, chitosan, poly L-lactic acid and poly amino acid, have been paid more and more attention recently [1]. γ-PGA is a hydrophilic, completely biodegradable, and naturally available biopolymer produced by the Bacillaceae family. γ-PGA and its derivatives have been applied in a broad range of fields such as food, superabsorbent polymer, cosmetics, medicine, plastics, and water treatment etc [2-3].
Materials and methods Materials and reagents.
Results and discussion Characterizations of materials.
Kalra: Science Vol. 297 (2002), p. 803 [2] M.H.
Wang: Journal of Composite Materials Vol. 43 (2009), p. 2805 [8] J.M.

Research on construction technology of self-monitoring asphalt concrete Shaoxu Huang1, a, Changjun Sun1,2,b , Ning Tang1,c, Pan Pan1,d and Shaopeng Wu1,e 1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China 2Caofeidian Development Investment Group Co., LTD, Tangshan, 063210, PR China ahsx@whut.edu.cn, bsunchj001@126.com, ctangning@whut.edu.cn, dpanpan8597@whut.edu.cn, ewusp@whut.edu.cn Keywords: self-monitoring; asphalt concrete; construction technology Abstract.
With some conductive materials such as graphite added, the asphalt concrete has an excellent conductive properties and a good electrical behavior.
The material of electrode meshes is stainless steel, and the size of mesh is 1cm×1cm.
[2] Xiaoming Liu, Shaopeng Wu: Construction and Building Materials.
[3] LIU Xiaoming, WU Shaopeng, LI Ning, GAO Bo: Journal of Wuhan University of Technology-Mater, Materials Science Edition.

If use low calcium fluidized bed boiler fly ash to produce fried bricks, not only the carbon contains in low calcium fluidized bed boiler fly ash can be used , but also land resources can be saved, It achieves that the effective utilization of industrial waste, new wall materials of environmentally friendly and energy saving can be produced.
Raw materials and test 2.1 Raw materials and experimental design The chemical composition of fly ash and clay as shown in Table1-1 and Table 1-2.
Experimental raw material use after crushing, drying at 105 °Cand screening.
Under the same forming pressure conditions, the dense degree of blank decline as fly ash increasing, The point of contact between the materials inside blank reduces, Thus it is difficult to sinter when the fly ash is added, the water absorption increases, physical properties decline. 4.
Fuel. 1995 [4]  LUO Yuping1,2,WANG Lijiu1,SU Liqing3,Ma Liguo2,Wu Guiqin2 Comparison Research on the Performance of Fly Ash and Comprehensive Utilization Discussion [J],  Journal of Shenyang Jinzhou University(Natural Science), 2007.3

However, the dependence of hardness on grain size does not show a single trend that applies to every ceramic material [6].
Materials and Methods Stoichiometric synthetic HA powders with 1.66 Ca/P molar ratio was uniaxially compacted into an 8.4 mm diameter cylindrical die at 180 and 250 MPa and sintered in air during 6 hours at 1000 oC with a heating rate of 3 oC/min.
These values are very high considering ceramic materials processing.
Vickers hardness (VH) tests are in course, in order to analyze larger areas, being more representative of the whole material property.
Journal of Materials Science: Materials in Medicine, vol. 6 (1995), p. 8-3

With the method of mechanical pressure loose, no fixed shape, low calorie value, sawdust, straw, rice husk and other biomass materials are briquetted a certain shape, higher density, high calorific value solid fuel, the process called biomass briquetting technology[2].
(1) Take a small section materials whose length is dx from the mould, and due to the high temperature and high pressure in the mould during the process of briquetting, lignin in the material has been softened, after plastication the material flow fully, and therefore the length of the dx mould is regarded as a pressure vessel.
The material is pressed by the axial impact extrusion F, the positive pressure that the die hole inner wall to material is N, and the friction that the die hole inner wall to material is Ff, fk is the friction coefficient that the die hole inner wall to material, due to the material force balance, the material also produce an opposite reaction to the die hole.
DL12BB08) and Heilongjiang natural science fund(No.C201030) References [1] F.Zhao, Y.
Agricultural engineering journal, 9(1994)140-145

Recently, there has been an increasing interest in the application of electrochemical (EC) methods for the treatment of organic materials in wastewater[4].
The effectiveness of EC methods for the treatment of organic materials in wastewater depends on the nature of the anodes[6].
Anode materials, e.g.
Experimental Materials and chemicals.
Polymer Science, Ser.

Grain Size Control in the Weld Pool and Heat Affected Zone Using Holograms R.L.Higginson1a, M.Blackmur1b, M.Gibson2c, J.Tyrer2d 1 Department of Materials, Loughborough University, Loughborough, LE11 3TU, UK 2 Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK.
ED(X)S analysis of similar deposits has demonstrated that there was no mixing between the deposit and the substrate material [3].
Greer: Materials Science and Engineering A, Vol.133, (1991) p.16
Thomson, Journal of Microscopy, Vol. 2172, (2005), p.167
[6] R.L.Higginson, M.R.Gibson, J.Kell, and J.R.Tyrer, Materials Science Forum, Vol. 638-642, (2010), p.3673

Modelling time-dependent nucleation of recrystallization in aluminium alloys Knut Marthinsen1,a, Jesper Friis2,b and Olaf Engler3,c 1Department of Materials Science and Engineering, NTNU, NO-7491, Trondheim, Norway 2SINTEF Materials and Chemistry, NO-7465, Trondheim, Norway 3Hydro Aluminium Rolled Products, R&D Center Bonn, D-53014 Bonn, Germany aknut.marthinsen@material.ntnu.no, bjesper.friis@sintef.no, colaf.engler@hydro.com Keywords: recrystallization, modeling, time-dependent nucleation Abstract.
Materials Science Forum Vols. 715-716 (2012) 543-548
Journal of Nuclear Materials 366 (2007) 178-186

Introduction Low-activation materials for fusion reactors have received much attention in the past decade because of their importance for environment and nuclear waste management.
The main advantage of using heavy ions is the high displacement damage production within a short term, and therefore enables some screening test on microstructure in candidate materials.
Benfu Hu of University of Science and Technology Beijing for the supply of the Fe-Cr-Mn alloys.
Materials for Advanced Energy System & Fission and Fusion Engineering, eds.
[11] C.H.Zhang, K.Q.Chen et al, Proc. 3rd China/Japan Symposium on Materials for Advanced Energy Systems and Fission & Fusion Technology, Eds.

It is the optimization and integration of several ballastless track, and its main innovations include the following: to change the traditional displacement restriction mode of slab track, to expand the filling layer materials under the slab, to optimize the structure of the track slab, improve the elasticity of track, and perfect the design theory system, etc. 1) III type slab connect the self-compacting concrete (internal reinforced net)and track slab into compound structure by setting two u-shaped steel under the slab, and its structural integrity is good.
Prevention measures of CRTS III track slab cracks Optimize raw materials 1) To reduce the hydration heat, we should use low early hydration heat of cement, whose mineral composition and fineness modulus is appropriate. ①Reduce content of C3A and C3S in cement clinker, use moderate heat Portland cement and low heat Portland slag cement in the construction commonly; ②Without affecting activity of cement, we can try to make an appropriate increase in the fineness of the cement because cement fineness would influence the hydration exothermic rate. 2) Try to increase the size of coarse aggregate.
Science & Technology Information, 2009 (1)
Journal of railway engineering, 2007 (9) : 76-79
Advanced Materials Research, v 629, p 466-470, 2013, Material Sciences and Manufacturing Technology.