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Materials and methods This experiments were divided into three groups: The first group used NaCl as the salt source, which was the pure salt condition; the second group of tests was the compound salt condition, using NaCl&Na2SO4 as the salt source[9] based on the salt dosage of actual production; and the third group of tests used actual tannery wastewater as the salt source.
Journal of Applied Electrochemistry, 2005, 35: 381~390
Journal of Jiangsu Institute of Petrochemical Technology, 2001, 13(4):4~6
Journal of Nanjing University of Science and Technology, 2003, 27(6):715~719
Biomedical and Environmental Sciences. 2005, 18:5~8

Jankowski: Structural pounding models with Hertz spring and nonlinear damper, Journal of Applied Sciences Vol. 8 (2008), P. 1850 [16] R.
Jankowski: Experimental study on earthquake-induced pounding between structural elements made of different building materials, Earthquake Engineering and Structural Dynamics Vol. 39 (2010), P. 343 [19] A.M.
Chouw: Influence of soil-structure interaction on pounding response of adjacent buildings due to near-source earthquakes, Journal of Applied Mechanics Vol. 5 (2002), P. 543 [21] K.
Jankowski: Elastic and inelastic multi-storey buildings under earthquake excitation with the effect of pounding, Journal of Applied Sciences Vol. 9 (2009), P. 3250 [23] F.E.

Study On Structure Analysis and Cell Toxicity Of Okra Polysaccharide Min Li-jing1 School of Life Science, Huzhou Teachers College, Huzhou, Zhejiang 313000 Keyword: okra polysaccharide; structure; cytotoxicity assay Abstract: The aim is to analysis okra polysaccharide component and structure, and study on the cell toxicity.
[Method] In this paper, we used okra seeds as raw material, extracted okra polysaccharide by boiled alcohol sink method extraction, purified it, studied the mono-saccharide composition, and did okra polysaccharide cytotoxicity assay.
Ltd.; calf serum (FCS) were purchased from Hangzhou Sijiqing biological engineering materials Co., ltd..
TABLE 2 THE RETENTION TIME OF EACH MONOSACCHARIDE COMPOSITION OF OKRA POLYSACCHARIDE ACID HYDROLYSATE retention time（tR/min） monosaccharide compositio 7.014 rhamnose 8.754 arabinose 9.957 D-xylose 12.490 D－ fructose 15.084 D－glucose Cytotoxic assay Fig4 The data of cytotoxic assay Figure4 shows the observed cytotoxicity, okra polysaccharide and glucose similar, belong to low toxicity materials, good biological compatibility.
Research Advances on biological activities of polysaccharides of plant [J]．Journal of Dali University,2012,11(6):36-37 [2] Fang xiangru.The prospect of energy resources in alternative way of biomass[J]．Progress in chemical industry,2011,30(11):2333-2339 [3] Li xin.

According to fabrication and strength of material requirements, a group of compromised counters are selected and studied.
Cost Function Accompanying engineering demands for high pressure vessels with and without large sizes are often the economic ones of weight reduction to save materials, to enhance shipping and erection procedures and reduce fabrication costs.
Lucas, “Colonial Competitive Algorithm, a novel approach for PID controller design in MIMO distillation column process,” International Journal of Intelligent Computing and Cybernetics, 1 (3), 337–355. 2008 [10] R.
Lucas, “Colonial Competitive Algorithm as a Tool for Nash Equilibrium Point Achievement,” Lecture notes in computer science, 5073, 680-695. 2008 [11] J.
Harvey, “Pressure Component Construction: Design and Materials Application,” Van Nostrand Reinhold, New York. 1980

Valiev et al., Nanostructured titanium-based materials for medical implants: Modeling and development, Materials Science and Engineering R: Reports. 81 (2014) 1-19.
Valiev, Materials science: Nanomaterial advantage, Nature, 419 (2002) 887-889
Dutkiewicz, Plastic deformation of CuAlMn shape-memory alloys, Journal of Materials Science. 29 (1994) 6249-6254
Bunge, Texture analysis in materials science mathemetical methods, Butterworths, London, 1982
Ren, Physical metallurgy of Ti-Ni-based shape memory alloys, Progress in Materials Science. 50 (2005) 511-678

Purification and characterization of laccase from curvularia trifol Jie Zhang1,a , Jing Ren1,b , Yang Yu2,c , Binsong Wang2,d* 1 School of Life Sciences, Northeast Forestry University, Harbin 150040, China 2 School of chemistry chemical engneering and material，Heilongjiang University，Harbin 150080 ,China a 875817856@qq.com, brenchouchou1256@163.com, c9709149@qq.com, d 609291321@qq.com Keywords: Curvularia trifol; laccase; purification of enzyme; enzymological properties Abstract.
Since the first time it was found, the laccase had been the research focus of chemistry, biology and environmental science fields.
Experimental Materials Strains Gladiolus Curvularia from the Northeast Forestry University's microbiology laboratory.
Acknowledgments This work was supported by the Project Program of Youth Science Technology Fund of Heilongjiang Province(QC07C19), the project of Heilongjiang Provincial Department of Education Science and Technology（2008-11531270）, and the project of Youth Science and Technology Innovation Fund of Harbin (RC2009QN015018).
Journal of Beijing Forestry University, 59-64 ,(2005), p.27 [3] Lei Lu,Min Zhao,Bei-Bei Zhang,et al.: Purification and characterization of laccase from Pycnoporus sanguineus and decolorization of an anthraquinone dye by the enzyme.

Belous, Argon-arc welding of titanium and its alloys using fluxes (Review), The Paton Welding Journal. 2 (2017) 7-12
Drozdova, Structure and properties of welded joints from various titanium alloys, Metal Science and Heat Treatment. 33(7) (1991) 512-517
Popov, Vacuum annealing of welded joints of titanium alloys OT4 – VT6, VT20 – VT6 and VT23 – VT6, Metal Science and Heat Treatment. 62(7-8) (2020) 430-435
Series: Materials Science and Engineering. 582 (2019)
Oleneva, Structure and properties of welds of high-alloy titanium alloy after heat treatment, Metal Science and Heat Treatment. 52(9-10) (2011) 476-480.

According to its characteristics of working conditions, grinding ball’s material should be considered comprehensively as the following requirements: 1) To be sure that grinding ball must have longer service life, its material should have higher anti-wear property, namely it must have higher hardness; 2) During the ball grinding rotates, grinding balls fall down and directly impact on the other grinding balls, while they rise to a certain height along with the materials.
Grinding balls’ materials spall eventually along with crack producing and constantly expanding.
The results of the study indicate that, among many materials of metamorphic treatment, rare earth ferrosilicon alloy is the most effective metamorphic agent.
References [1] Casting and Wear-resistant Materials Research Institute of Xi’an Jiaotong University, Research on Wear Resistant Materials [A], FOUNDRY TECHNOLOGY
[5] Xiaoyan Ye, Xiaoping Jiang and so on, Fatigue Reliability Analysis on Crankshaft of Reciprocating Pump [J], CHINESE JOURNAL OF MECHANICAL ENGINEERING

Determination of the range of validity: reasons (goals, criteria of fruitfulness), definition of the system (description, interface, environment, energy, materials, information flow, operation conditions…), sources of information (legal, normative, organizational, human…), assumption and limits, required outputs and decisions (competences). 2.
Possible risks in supply Every industry is reliant on strategic raw materials.
The department of pruchasing is responsible for management of production supplies, which include numerous and diverse range of assortment of raw materials, materials, components, semi-finished products, spare parts for devices maintenance, for packaging and packaging materials, indirect materials for management and administration, etc.
If the purchasing department has the option of selection for materials suppliers, components and finished products, supply and production are not endangered by lack of components.
Varzakas, A conjoint study of quantitative and semi-quantitative assessment of failure in a strudel manufacturing plant by means of FMEA and HACCP, Cause and Effect and Pareto diagram, International Journal of Food Science & Technology. 42-10 (2007) 1156-1176.

Some harmful materials such as atmospheric dust, SO2 and NOX are the major source of the air pollution, the acid rain and the greenhouse effect.
Some harmful materials such as SO2 and NOX are mainly generated in coal burning process in our country.
This type of catalyst is made of Ti-W-V as the main active materials which are fully mixed with TiO2 materials by mould extrusion and calcining.
The low-temperature catalyst is classified into four types of precious metal catalysts, molecular sieve catalyst, metal oxide catalyst and carbon materials catalysts [8]. 3.3.1 Precious metal catalyst The advantage of precious metal catalyst is that it has a better activity in low temperature.
And the chemical material is V2O5