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Preparation and characterization of 2-hydroxypropyltrimcthyl ammonium chloride chitosan Jin Zheng1, a, Zhao Kai2,3,b,* , Chen Gang2,c and Zhang Xu 1,d 1 Key Laboratory of   Chemical Engineering Process&Technology for High-efficiency Conversion, College of Heilongjiang Province, Laboratory of Functional Polymer Materials, School of Chemistry and Material Sciences, Heilongjiang University, Harbin, Heilongjiang, China 2 Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, China 3 Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education a jinzhengdvd@163.com, b zk395@yahoo.com.cn, c wutongyeyu163@163.com, d651377327@qq.com * Correspondence author Keywords: chitosan, nanoparticle, preparation, spectroscopy.
Experimental Materials Chitosan(deacetylation degree, D.D≥85% determined by1H-NMR, medium molecular weight) was obtained by Sigma-Aldrich. 2,3-Epoxypropyltrimethylammonium chloride, Shandong Guofeng Fine Chemical Co.
Acknowledgements This research was supported in part by National Natural Science Foundation of China (31072119), Key Scientific and Technological Planning Project of Harbin (2009AA6CN125), Education Committee Science and Technology Research General Projects of Heilongjiang Province (11531265 and 11541267), Innovation Foundation of Harbin (2010RFQXN091) and the Heilongjiang Postdoctoral Foundation (LBH-Q07109).
International Journal of Biological Macromolecules.
International Journal of Biological Macromolecules.

Table 1 Carbon emission related to the domestic energy consumption Unit: t (c)/t Data sources Coal Oil Natural gas DOE/EIA 0.702 0.478 0.389 IEEJ 0.756 0.586 0.449 Climate change programs by the state science and technology commission 0.726 0.583 0.409 Xu (2006) 0.7476 0.5825 0.4435 Mean value 0.7329 0.5574 0.4226 Assuming that the total energy consumption in China is tons of standard coal, the proportion of coal, oil and natural gas is, and respectively.Assuming that the molar quantity of CO2 and C is respectively 44 and 12, the equation of CO2 emission based on the total energy consumption and its constuction can be listed as following Eq. (4) (4) In the process of producing cement, CO2 is emitted not only produced by burning fuel to roast clinker and drying raw materials, but also from the decomposition of calcium carbonate (CaCO3 and MgCO3), claiming kiln dust in cement kiln systems and burning
organic carbon in raw materials.
In producing a ton of cement, the quantity of CO2 emitted from the decomposition of calcium carbonate (CaCO3 and MgCO3), claiming kiln dust in cement kiln systems and burning organic carbon in raw materials is 0.5482 ton [9].
Ben and B C Yang: Journal of Harbin University of Science and Technology.
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Possibility of the process monitoring during assembly and disassembly components Radovan Holubek1,a 1 Faculty of Material Science and Technology, Slovak University of Technology, Paulinska 16, 917 24 Trnava, Slovak Republic aradovan.holubek@stuba.sk, Keywords: Assembly, disassembly, Pick and Place manipulator, sensor, control unit Abstract.
In: Journal of Intelligent and Robotic Systems 37: 307–320, 2003. 2003 Kluwer Academic Publishers.
In: World Academy of Science, Engineering and Technology. - ISSN 2010-376X. - Vol. 77 (2011), s. 2459-2464
Velíšek: Contributions to the design and analysis of the material flow at an intelligent manufacturing cell.
In: MM Science Journal. - ISSN 1803-1269(P). - ISSN 1805-0476(E). - Special Edition : Proceedings of the RAAD 2011. 20th International Workshop on Robotics in Alpe-Adria-Danube Region (RAAD), October 5-7, 2011, Brno, Czech Republic. - , 2011, s. 28-33.

Introduction Aluminiun (III) oxide is the chemical compound that has been reported for a longtime as one of the important materials in several fields such as ceramics, pigments, cosmetics [1], and catalysis [2].
His contribution and insight in this regard have provided ways to identify different species of hydroxyl groups on different surfaces of materials.
Experimental Materials and sample preparation.
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Kimmel, The Journal of Physical Chemistry C Vol. 122 (17). (2018),  p. 9540–9551

The main fields where these materials are in demand are aircraft construction, space industry and sports equipment manufacturing. [1].
Yoon, Structural features of polyacrylonitrile-based carbon fibers, Journal of Materials Science, 47 (2011) 919–928
Phair-Sorensen, Polyacrylonitrile-based precursors and carbon fibers derived from advanced RAFT technology and conventional methods – The 1st comparative study, Materials Today Communications, 9 (2016) 22–29
Kozlov, Properties and structure of polyacrylonitrile fibers, Polymer Science Series A, 52 (2010) 1233–1238
Badamshina, Anionic Copolymerization of Acrylonitrile with Methyl Acrylate under the Action of a Novel Initiating System Based on a Bicyclic Tertiary Amine and Ethylene Oxide, Russian Journal of Applied Chemistry, 93 (2020) 1009–1018

China 2Institute of Surface Micro and Nano Materials, Xuchang University, 88 Ba-Yi Road, Xuchang 461000, China.
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Preparation and Luminescent Properties of Green-Emitting La(BO3,PO4): Ce, Tb Dong Li-mina, Zhuang Yanli, Han Zhi-dong, Wu Ze and Zhang Xian-you College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China a donglimin@hrbust.edu.cn Keywords: Green phosphor; Sol-gel; Borophosphate; Luminescent properties Abstract.
Sol-gel method has attracted great interest as an excellent approach in preparing inorganic-organic hybrid materials and been employed to prepare fluorescent powder thanks to its many advantages such as better purity, good homogeneity of products and lower synthesis temperature.
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As an ideal natural antioxidant, TP have a series of special Pharmacology functions at anticancer, anti-aging, radioresistance, hypoglycemic effect and so on. [3，4，5] The traditional methods to extract tea polyphenols have hot water lixiviation method and organic solvent method. [6] Although Organic solvent lixiviation has special effect in some materials extracting, its cost is too high and has pollution of products in addition.
Materials and methods Materials.
Study on extraction process of tea-polyphenols substance from green tee by ultrasound wave [J].Journal of ShaanXi normal university(natural science adition), 2009, 37(1): 35-37
Optimizing of ultrasonic wave-assisted extraction process of tea-polyphenols substance from green tea[J].Journal of northwest A&F university(natural science adition), 2011, 39(5): 133-139
HuBei Agricultural Sciences, 2012, 5(22): 5147-5155.

Moreover, when food materials deliver, the temperature would affect the food safety.
The bacteria likes room temperature and it would cause disease when over time of food materials placed at operations table in a culinary room.
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However, they also keep one and a half month of safety stock, conduct daily risk meeting, hire contract workers to sort reject materials and have back-up suppliers as risk reactive strategies.
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