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There are a lot of biomass cooking stoves, stove have studied at home and abroad [1], the main raw materials are all kinds of wood, The main ways of biomass ignition includes hot air ignition [2,3,4,5], electric spark, ignition or using combustion gas ignition [5], all these ways have the problem of high ignition time, high ignition power, at the same time, unsteady state of large quantities of combustible ignition smoke gases, fine droplets and solid particles are main pollution sources of biomass burning during use.
Thomas [1] indicate the ignition process of the oxidation reaction causes the surface of the biomass solids and temperature above the ignition temperature of the air, the ignition temperatures of different materials is different , but lower than the ignition temperature of the coal.
Peter, An experimental study of biomass ignition, fuel 82(2003)825-833 [2] Xu Fei, Zhao Lixin, Meng Hai-bo, Biomass pellet fuel hot air ignition performance of experimental research, journal of agricultural engineering，2011,27(7):288-295
The influence of air quantity biomass pellet fuel combustion experimental research, Journal of Shandong Jianzhu University, 2012 [4] V.K.Verma, S.Bram, F.Delattin, Agro-pellets for domestic heating boilers: standard laboratory and real life performance, Applied Energy, 2012，90：17-23 [5] J.
Combustion science and technology

Comparison of Leaching Processes of Gold and Copper from Printed Circuit Boards of Waste Mobile Phone Jianfeng Yin1, Sihui Zhan1, He Xu1,a 1 College of Environmental Science and Engineering, Nankai University, Tianjin 300071, P.R.
Materials and methods Materials and reagents.
Jeong, et al.: Journal of Hazardous Materials, Vol. 178 (2010), p.1115-1119
Chen: Chinese Journal of Environmental Engineering, Vol. 3 (2009) No.5, p. 911-914.

Selective tension apparatus development of vibration membrane for stereo speaker production Kim UkSu1, a, Jung YoonJun1, b, Jeong BaWi1, c, Kim MinSu2, d, Yang GilSurp3, e, and Park JeongWoo4, f* 1Department of advanced parts and materials engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju South Korea 2Department of mechanical design engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju South Korea 3The most beautiful tree corp., 309, Pilmun-daero, Dong-gu, Gwangju South Korea 4Department of mechanical system engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju South Korea auksunano@gmail.com, fjwoopark@chosun.ac.kr * Please mark the corresponding author with an asterisk Keywords: Stereo speaker, Vibration membrane, Tension apparatus, Tension point, Al profile Abstract.
In this study, frame material is al profile on A6N01S-T5 [3, 4].
Table, 1 Al profile technical data Size 30(height)ⅹ90(width)mm Material A6N01S-T5 Surface processing Anodizing Weight 2.54 kg/m Section area 938.2mm2 Second section moment Ix=9.5ⅹ10cm4 Iy=76.2ⅹ10cm4 Fig. 4, Selection of vibration membrane tension frame size Fig. 5, 3D modeling for analysis of vibration membrane tension frame Fig. 6, Structural analysis resuly of the vibration membrane tension frame (a) Z-Weight (b) Z, Tension force Figure 5 show the degree of effectiveness force while vibration membrane tensile force.
Ruan, Finite volume simulation and mould optimization of aluminum profile extrusion, Journal of Materials Processing Technology, 190 (2007) 382-386 [3] L.
Guo, Research on corrosion behavior of A6N01S-T5 aluminum alloy welded joint for high-speed trains, Journal of Mechanical Science and Technology, 26 (2012) 1471-1476 [5] J.

As illustrated in Fig. 1 and Fig. 2, SmartSiCTM is a bi-layer SiC engineered substrate composed of a thin layer of 4H-SiC material, ranging from 700 nm to 350 nm, transferred to a specific handle wafer. 4H-SiC 350 nm to 700 nm Handle material ≥350 µm Fig. 1.Typical SmartSiCTM stack.
Baierhofer et al., Material Science in Semiconductor Processing, vol 140 (2022), 106414 [4] T.
Kimoto, Japanese Journal of Applied Physics, vol 54 (2015), 040103 [5] H.
Sridhara et al., Materials Science and Engineering, B61–62 (1999), pp. 229-233 [7] R.
Weingärtner et al., Materials Science and Engineering, B80 (2001), pp. 357-361

Alberto Lamego, 2000, 28013-602, Campos dos Goytacazes, Brazil. 2 - IME - Military Institute of Engineering, Department of Materials Science, Praça General Tibúrcio, 80, 22290-270, Rio de Janeiro, Brazil.
Materials and Methods The basic materials used in this work were supplied by the Sigma Aldrich firm.
Gòmez: European Polymer Journal Vol. 42 (2006), p. 3093
[9] American Society for Testing and Materials.
[10] American Society for Testing and Materials.

In building materials science, interest in nanotechnology has also been shown, but so far the developments of scientists in this area are less applied on an industrial scale than in other spheres of the national economy.
Work on obtaining new building materials using nanotechnology is being carried out in various areas of the production of building materials [1,2].
Nowadays it has become a tendency to use materials of both natural and technogenic origin, crushed to nanoscale.
Trettin, Carbon Nanotubes As A new Reinforcement Material for Modern Cement-Based Materials, Proceedings of the 2 nd International Symposium on Nanotechnology in Construction, RILEM Publications s.a.r.
Zemskova, Model and mechanism of stabilization of carbon nanotubes with placticizer on the basis of sulfonated naphthalene formaldehyde resins, Materials Science Forum, vol. 931, pp. 481-488, 2018.

Factories, especially chemical-based production industry do not look seriously into this matter when dumping their waste materials directly into the nearest rivers and seas.
Microorganisms which are cultivated in laboratory or waste biomass from industries are relatively abundant and inexpensive materials can be used as biosorbents.
Materials and Method Preparation of Immobilized Yeast.
The materials used are the baker’s yeast from AB Mauri Malaysia Sdn.
Kirthika, Equilibrium and kinetic study of adsorption of Nickel from aqueous solution onto bael Tree leaf powder, Journal of Engineering Science and Technology, 4(4), (2009), p. 351-383

.), Advancing Silicon Carbide Electronics Technology II, Core Technologies of Silicon Carbide Device Processing, Materials Research Forum LLC, Millersville, 2020, pp. 1-62
Pantelides, Excess carbon in silicon carbide, Journal of Applied Physics 108(12) (2010) 123705
Vasilevskiy (Eds.), Advancing Silicon Carbide Electronics Technology II, Core Technologies of Silicon Carbide Device Processing, Materials Research Forum LLC, Millersville, 2020, pp. 63-174
O'Neill, High-Mobility SiC MOSFETs Using a Thin-SiO2/Al2O3 Gate Stack, Materials Science Forum, Trans Tech Publ, 2018, pp. 494-497
Tsuchida, Enhancing interface quality by gate dielectric deposition on a nitrogen-conditioned 4H–SiC surface, Journal of Materials Research 28(1) (2013) 28-32

Materials and methods Study area.
Acknowledgements This research work was financially supported by Major R&D Project of Science and Technique Program of Hainan Province (ZDXM20130046) and Hainan Provincial Natural Science Foundation of China (312054).
Sun: Journal of Natural Resources.
Tang: Chinese Journal of Soil Science.
Tang: Chinese Agricultural Science Bulletin.

E-mail address: shxia@mail.ie.ac.cn amperometric immunosensor with a new method of electropolymerizing SPA to immobilize antibodies (bio-molecular recognition element) for S. typhimurium detection. 2 Materials and methods 2.1 Preparation of the amperometric transducer The amperometric immunosensor fabricated with MEMS technology contains a two-microelectrode system integrated with a SU-8 micro poll on the silicon wafer.
Acknowledge: Support for this work comes from Institute of Microbiology, Chinese Academy of Sciences.
This work is supported by the National Natural Science Foundation of China (Grant No. 60672019) and the CAS-sponsored Knowledge Innovation Program (Grant No.KGCX2-YW-111-6).
Alegret,-Renewable Protein A modified graphite-epoxy composite for electrochemical immunosensing‖,Journal of Immunological Methods 286,35- 46,2004
International Journal of Food Microbiology, 78(1-2), 3-17,2002.