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Materials and Methods Materials Fermentation raw materials.
Table 3 Potential for biogas production from various materials Fermentation materials Biogas yield [ml/g TS] Reference Biogas yield of Hylocereus undatus stem relative to various raw materials Hylocereus undatus stem 695 - - Aloe Vera Peel 478 [7] 1.45 Corn straw 447 [8], [9] 1.55 Wheat straw 450 [8], [9] 1.54 Rice straw 540 [10] 1.28 Bagasse 201 [11], [12] 3.46 Table.3 shows that the gas production of the Hylocereus undatus stem is higher than the other materials.
Journal of Anhui Agri.Sci, Vol. 9(2009), p.4007-4009
Journal of Yunnan Normal University, Vol. 3(2013), p.6-11
Journal of Agricultural Mechanization Research.

For practical applications to automotive parts, the improvement ratio of the material with specific shape also should be discussed, not only with the flat plate.
Production Process of Specimen Material.
Misra, Engineered natural fiber reinforced polypropylene composites influence of surface modifications and novel powder impregnation processing, Journal of Adhesion Science and Technology, Vol.16, No.8 (2002), pp.999-1015
[4] Naoto Miyakita, Kazuya Okubo, Kiyotaka Obunai, Kazuya Yanagida, Effective diameter of added glass fiber into matrix of carbon fiber reinforced thermos-plastics for improving mechanical properties, ASC 33rd Annual Technical Conference&18th US-Japan Conference on Composite Materials (2018), pp108
Nguyen, Naoto Mitakita, Kazuya Okubo and Kiyotaka Obunai, Impact Improvement of Tape Carbon Fiber Composite Modified by Submicron Glass Fiber, Journal of Materials Science Research; Vol. 8, No. 4 (2019), pp.21-29.

Enironmental Science, 2006, 27(2): 294-299. ].
Chinese Journal of Environmental Science, 2006, 27(10): 2081-2086. ].
Environmental Science & Technology, 2010, 33(2): 126-130. ].
Chinese Journal of Environmental Science, 2006, 27(6): 1144-1151. ,[] GAO Nai-yun, RUI Min, XU Bin, et al.
Chinese Journal of Environmental Science. 2007, 28(1): 120-125. ], etc..

Materials and methods Nanoparticles (NPs) of ZnAl2O4 were synthesized by combustion reaction in the Synthesis of Ceramic Materials Laboratory (LabSMaC) UFCG.
Wang: Materials Science and Engineering B Vol. 151 (2008), p. 224
Wang: Journal of Hazardous Materials Vol. 186 (2011), p. 2089
Rosaly: Optical Materials Vol. 33 (2011), 1226
Costa: Materials Science Forum Vols. 727-728 (2012), p. 1260

The micro-PECM (Pulse Electrochemical Machining) combining synchronous ultrasonic vibration is proposed as a new technology for to solve the difficulty machining problems of conductive hard and tough materials.
Generally, the mid carbon steel and the spring steel are selected as electrode materials of the micro-machining.
Beijing. 2005 [4].B.Bhattacharyya, J.Munda，Experimental Investigation into Electrochemical Micromachining (EMM) Process[J]，Journal of Materials Processing Technology，2003，140：287~291
[5].Zhao Wansheng，Wang Zhenlong．Ultrasonic and electric discharge machining to deep small hole on titanialloy[J]．Journal of Materials Processing Technology，2002，120：101~106
Selected problems of micro electrochemical machining[J], Journal of Materials Processing Technology, 2004, 149(1-3): 426-431

Statement of the Problem The main evaluation performance criterion for the efficiency of pipelines from polymeric materials is the hydraulic potential of the pipeline.
Piping parameters of polymeric materials with d = 315 mm.
Kushnir, Anticorrosion Coatings based on a Water-Bitumen-Polymeric Composite with High Rates of Formation, Materials science, 49/3 (2013) 404-407
Rhodes, Are tracking resistance of polymeric materials in oxygen deficient conditions, 2003 annual report conference on electrical insulation and dielectric phenomena (2003), 104-107
Chen, Interfacial dynamics in complex fluids, Journal of fluid science and technology. 11/4(2016)

Stresses around V-notch are obviously smaller than those around D-notch, and we suppose that it is because materials around V-notch which introduces intense stress concentration firstly yield under intensely increasing thermal stresses.
Acknowledgements This work was financially supported by Guangxi Natural Science Foundation Program (2012GXNSFBA053150).
References [1] HU Shao-qiu, ZHANG Hui, YANG Li-bin, et al.. : Natural Science Journal of Xiangtan University Vol. 6 (2004), p. 66(in Chinese) [2] Michael B.
Edwards: International Journal of Pressure Vessels and Piping, 86(2009):126-131.
Vol. 86(2009), p. 126 [5] LIAO Kai1, WU Yun-xin, GONG Hai: Transactions of Materials andHeat Treatment Vol. 30(2009), p. 197(in Chinese) [6] KE Ying-lin, DONG Hui-yu: The Chinese Journal of Nonferrous Metal Vol. 14(2004), p. 639(in Chinese)

IOP Conference Series: Materials Science and Engineering; 2019: IOP Publishing
IOP Conference Series: Materials Science and Engineering; 2019: IOP Publishing
Journal of Composite Materials. 2016;50(4):543-56
Materials & Design. 2013;45:473-9
Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2019;41(7):300

Experimental Materials.
Journal of South China University of Tropical Agricuture.
European Polymer Journal.
Functional Materials.
Journal of Guizhou University (Natural Sciences).

Experimental Materials.
Journal of Applied Polymer Science, 99. 286-291(2006)
Journal of Applied Polymer Science, 92. 3201-3210(2004)
Journal of Applied Polymer Science. 108. 334-341(2008)
Journal of Applied Polymer Science. 104. 111-117(2007).