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Such a combination of properties of hydrogels determines a wide range of application scope - from technical fields (sorbents, gas separation and ion-exchange membranes) to the food industry and medicine (structure formers of food products, drug delivery systems, artificial substitutes for biological tissues, materials for soft and intraocular lenses, etc.). [1].
The absence of the latter is a mandatory requirement for materials used in tissue engineering, pharmaceuticals, and biomedical engineering as dressings for wounds of various etymologies, implants and polymer injection systems [2].
The high interest of researchers in biopolymers is also due to economic factors: low cost of their production, environmental friendliness and a variety of rich raw materials.
Chitosan (an aminopolysaccharide, poly(2-amino-2-deoxy-β-D-glucan), a product of chitin deacetylation), is one of the most promising in practical terms polymers obtained from constantly renewable raw materials [4].
State of the Art in the Targeted Modification of Chitosan // Polymer Science - Series B, 2018, 60(2), стр. 131–161; [7] G.R.

Most materials were used in the process of dynamic deformation, flexible failure mechanism of research materia.
Experiment Materials.
Other materials are commercially available industrial products.
Journal of Applied Polymer Science.2012, 126:11-126 [4] Wang Shaohui ,Zhao Shugao, Zhang Ping.
Journal,1999,35(7):1319～1325 [9] J.

Besides expanding the scale and improving the quality, it should focus on developing synthetic materials, fine chemicals and product processing.
The EIDP here should take the advantage of rich resources in special forestry in Changbai Mountains and medicinal products; keep pharmaceutical and wine as the leading industries and strengthen the industrial relevance of metallurgy and building materials.
Journal of Cleaner Production Vol. 17-1 (2009), p.87-100
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Acknowledgements This research was supported by the Nation Basic Research Program of China(2009CB724606), Chinese Science Foundation (51074198), the Fundamental Research Funds for the Central Universities (CDJXS11241182), Chongqing Natural Science Foundation (No.2010BB6044).
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Comprehensive Evaluation on Ecological Effects of Artificial Reef Based on Grey Clustering Analysis Bingqing Liu1, a 1Marine Science college,Shanghai Ocean University, Shanghai, China. 201306 albaq900127@126.com Keywords:Artificialreef, Ecologicaleffects, Grey clusteringanalysis, Fuzzy synthetic evaluation.
Table 1 Comprehensive evaluation system of artificial reef ecological effects Natural characteristics of reef B1 1) Rising height- reef height ratio D1 2) Vortical flow length-reef height ratio D2 3) Complex index D3 4) Attachment degree D4 5) Reef life D5 Water environment B2 6) N：P D6 7) DO D7 8) COD D8 9) Suspended material D9 10) Bottom material D10 11) IN D11 12) IPD12 13) pH D13 Ecological effects B3 14) Phytoplankton D14 15) Zooplankton D15 16) Bottom dweller D16 17) Aufwuch D17 18) Density of large swimming animals D18 19) Species diversity D19 20) Individual grossness degrees D20 21) Protection of rare wild aquatic animals D21 22) Reef area stress situation D22 Social and economic results B4 23
Reference [1] Shuo Zhang, Manchang Sun, Yong Chen:Journal of Dalian Fisheries University[J], 2008(6): 13 － 19 (In Chinese) [2] YongChen, ChangqingYu,Guosheng Zhang,ShuoZhang:Journal of Dalian Fisheries University[J], 2002, 17( 1) : 64 －69 (In Chinese) [3] Jing Wu, Shuo Zhang, Manchang Sun, Yong Chen: Marine fisheries[J], 2004, 26(4):394—398(In Chinese) [4] Dongnian Lin, Deng Li: Research of Soil and Water Conservation[J], 2006, 13(3) : 259 － 262 (In Chinese) [5] Zhong Tu, Xiumei Zhang , Peidong Zhang, Guoqiang Huang, Baoqing Yang, Liyuan Sun:Modern Fisheries Information[J], 2009, 24(11) : 17 － 20 (In Chinese) [6] Jun Lin.
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Military Academy, Taiwan 5 Graduate Institute of Material Engineering, National Pingtung University of Science and Technology, Taiwan a chiufeng@mail.npust.edu.tw, bchtsai@mail.npust.edu.tw cchehsin@mail.nsysu.edu.tw, dloudyfu@mail.npust.edu.tw Keywords: barrier, MEMS, micromixer, mixing efficiency, microfluidic system Abstract.
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Demand for high performance materials is driving sandwich panel development; modern core materials include honeycombs, polymers, metal foams and micro-architectured lattices.
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Kim: Fundamental Studies on the Incremental Sheet Metal Forming Technique, Journal of Materials Processing Technology, Vol. 140 (2003), p. 447-453 [13] J.M.

It can be used as materials of petroleum pipes with buttress thread.
In automotic production, chip breakage is always an important aspect to evaluate the machinability of materials.
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Modification of Al2O3 Microfiltration Membrane by Nano-ZnO Coating Jianer Zhou 1,2, Jianqing Wu 1, Yongqing Wang 2, Weihui Jiang 2, Guanghua Ma 2 and Ruibei Cao 2 1 Department of Inorganic Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China 2 Department of Inorganic Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333001, China Keywords: Homogeneous precipitation method, Zinc oxide, Modified coating, Microfiltration membrane Abstract.
In this paper, the α-Al2O3 microfiltration membrane modified by nano-ZnO coating was obtained using zinc nitrate and urea as raw materials via homogeneous precipitation method.
Zhang: Functional Materials Vol. 30 (1999), pp. 601
Fan: Journal of Tianjin Polytechnic University Vol. 20 (2001), pp. 79