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This was mainly due to the difference in chemical structure and composition, especially the number of ionizable groups which were the binding sites of the positive metal ions.
Shao: Progress in Chemistry Vol. 18(2006), p. 1414.

Tribology researches can be divided into fundamentals properties (surface physics, chemistry, electrical, magnetic, acoustic etc.), materials (the selection of test materials and lubricant for given conditions), surface treatments (methods of surface machining, modification, and coating), wear test system and conditions [1, 2].
Kilduff, Engineering Materials Technology – Structures, Processing, Properties & Selection (3rd ed.), Prentice-Hall, Inc., (1997)

And the scale of surface tension decrease depends on surfactant molecular structure.
Water glass is a colloidal solution with both colloidal properties and solution properties, and its dissolution is complex physical chemistry reaction [12].

In physics and chemistry, plasma is a state of matter similar to gas in which a certain portion of the particles are ionized.
Academic Press, San Diego, (1989) p 1–90 [12] Xu Xinwu, Zhou Dingguo: Journal of Nanjing Forestry University (Chinese) (2009) Vol. 33, No. 5:69-72 [13] Li Runqin: Organic structure spectroscopy [M].

Conclusions Because of the diversity of complex structure of materials containing germanium, there are so many methods.
Journal of Inorganic and Nuclear Chemistry, Vol.(26)2006:p.951-954

Earthquake energy absorbing control on engineering structure[M].
Rubber Chemistry and Technology, 1992, 1(65):46-62.

Contribution of diffusion processes to structure formation upon intensive cold deformation of metals. // Metals Science & Thermal Treatment, # 8 (2002), p.p. 3-12
Physics and Chemistry of Materials Treatment, Vol. 26, # 5 (1992), p.p. 610-614

Hence it has broad development prospects and environmental value, and conforms to the development direction of green chemistry.
But because starch which was used as base material in the graft copolymerization was very different from the final graft copolymer in structure and properties, the process of aqueous two-phase system formation was more complex than that of homopolymerization process of a single monomer, and the disperse system has great effect on stability of aqueous two-phase system formed after phase separation and state of the copolymer produced.

.: Generalized Simulated Annealing Studies on Structures and Properties of Nin (n = 2-55) Clusters, Journal of Physical Chemistry A, 2000, 104(12): 2746-2751

Basing on the mentioned above it is necessary to add that because the molecular sturcture, chemistry, dispensation density, etc. of granular substances influence the measurement results specifically, the achieved information allow to know an object of research more completely.
As a result we have a system with the modified structure that is shown on the fig.2 and that allows to increase an accuracy of measurement results.