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Introduction Empty Palm Oil Fruit Bunches (EPOFB) represent a significant biomass resource that can be transformed into valuable carbon materials, including graphite [1].
Based on these findings, acid pre-treatment is crucial for enhancing the conversion of biomass into carbon materials.
This finding underscores the importance of acid pre-treatment in optimizing the preparation of biomass-derived carbon materials for advanced applications.
The IG/ID ratio is a crucial parameter in evaluating the graphitic content and structural quality of carbon materials.
This work is also supported by Universitas Indonesia; Nanyang Technological University Singapura; Research Center for Advanced Materials, National Research and Innovation Agency Science and Technology; and Politeknik Negeri Jakarta.

Construction and Building Materials, 2014, 68: 501-516
Internaional Journal of Concrete Structures and Materials, 2013, 7(1): 61-69
Applied Mechanics and Materials, 2014: 665:143-146
Science China-Technological Sciences, 2012, 55(6): 1463-1480
Construction and Building Materials, 2017, 130:1-10 [9] Feng Y U, Ditao N I U.

Introduction InP is one of the most important compound semiconductor materials, and also the key material for the manufacture of the optoelectronic, microelectronic devices and circuits.
In general, the compound semiconductor materials prepared by the LEC method and specially HP-LEC method have high dislocation density which has an important relationship with the sliding movement of dislocations.
ZHAO: 14th Indium Phosphide and Related Materials Conference, Stockholm, Sweden, B5-2(2002)
CARUSO: Journal of Crystal Growth, Vol.79: (1986), P.243-262
YANG: Journal of Rare Earths, Vol. 25 (2007), P. 360-362.

Experiment materials and methods The precipitated hardening type of pre-hardened NAK80 steel is employed in this experiment, which chemical composition(wt%) is C 0.08, Si 0.7, Mn 1.5, Ni 2.8, Al 1.1, Cu 0.9, Mo 0.3, and the impurity elements P, S and Cr were less than 0.05% respectively, and the rest is Fe.
International Journal of Machine Tools & Manufacture, 2007, 47:P1667–1676
Journal of Materials Processing Technology, 2008,26(201):P 554-559
Materials Science and Engineering: A, 2009, 1(500): P104-108
International Journal of Pressure Vessels and Piping, 2008, 3(85): P117- 120.

Xu: Advanced Materials Research Vols. 197-198 (2011), p. 396-400 [6] F.
Ye: Advanced Materials Research Vols. 197-198 (2011), p. 396-400 [7] T.
Zhou: Advanced Materials Research Vols. 148-149 (2011), p. 803-807
Paradiso: AUTEX Research Journal. (2002), p. 199-203
Liang: Journal of Tianjin Polytechnic University.

Conditions of the hardening were the same for both analyzed materials.
Experiment Materials.
Journal of Materials Research and Technology, 9 (4), 2020, p. 8163–8171
Materials and Manufacturing Processes, 12 (1), 1997, p. 137–151
Journal of Materials Research and Technology, 9 (2), 2020, p. 2037–2043

But NdFeB materials are usually processed into various kinds of shapes.
However, NdFeB materials are usually processed into various kinds of shapes, such as ring, arc shape and wafer.
In order to simplify the experiment, we use cylinder samples and non-ferromagnetic materials to represent the nonstandard samples and air gap, respectively.
Yao: Explanations and Solutions of Performance Reduction in Permanent Magnet Products in Use, Journal of Magnetic Materials and Devices, 2003, (02)
Gao: Sintered NdFeB rare earth permanent magnet materials and technology[M], Beijing: Metallurgical Industry Press, 2011.

WJ39 Xiu-ling Ji1, 2 a , Muhammad Kamran Taj2, b , xiao-bo Lu2, c, Lian-bing Lin2, d, Qi Zhang2, e and Yun-lin Wei2,f * 1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Yunnan, China 2Faculty of Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China ajixiuling1023@gmail.com, bkamrancasvab@yahoo.com, c353854282@qq.com, dlinlb@sohu.com, eqzhang37@gmai.com, fweiyunlin18@gmail.com.
Material and Methods Bacterial Strain Organisms were isolated from a refrigerator of a meat factory in Kunming, Yunnan province in China. 
WJ39 was carried out by a combination of conventional purification procedure and major steps in the purification procedure were described in material and method.
Acknowledgments This research was funded by National Natural Science Foundation of China (No. 31160121).
A bacteria-inducible serine proteinase containing two clip domains, The Journal of biological chemistry. 278(2003): 3552-3561

Experimental Material. 1) Urea: analytical reagent; 2) SO2, NO and NO2: standard gas, purity above 99.99%; 3) Fluidized particles: diamantine ball, with diameter 2 mm and density 2350 kg•m-3.
Acknowledgements This paper supported by Science and Technology Research Youth Fund Project of Colleges and Universities in Hebei Province (No. 20100226).
References [1] Zaisha Wei, Zhehang Lin, Hejingying Niu, et al, Journal of Hazardous Materials, (2009), 162 (2-3): 837-841 [2] Yi Zhao, Yinghui Han, Tianzhong Ma, et al, Environmental Science and Technology, (2001), 45 (9): 4060-4065 [3] Gaiju Zhao, Yongchun Shi, Hongming Zhao, et al, 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 [4] Yi Zhao, Peiyao Xu, Xiaojun Sun, et al, Science in China, Series B: Chemistry, (2007), 50 (1): 135-144 (In Chinese) [5] ChaoPing Cen, GuoBang Gu, Journal of South China University of Technology (Natural Science), (2004), 32 (1): 32-40 (In Chinese) [6] ChaoPing Cen, GuoBang Gu , Journal of South China University of Technology (Natural Science), (2004), 32 (2): 14-17 (In Chinese)

Introduction All The technology of membrane is a combination of multiple sciences such as material technology and process engineering.
Ted Oyama: Journal of Membrane Science.
Fan, etal: Journal of Membrane Science.
Membrane Science.
Yuji: Journal of Membrane Science.