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The ecosystem theory helps to understand the relationship between specific variables in specific space, but hard to structure a systematic dynamic model of the interactions between different variables for lack of applicable methods and techniques.
Each theory above has one part in modelling the relationships and interactions between tourism and its environmental impacts, reconciling these theories provide a basis for structuring a comprehensive and systematic model in long term.
The ideas and models of CAS are essentially evolutionary, grounded in modern chemistry, biological views on adaptation and evolution and simulation models in economics and social systems.

The composition, structure and properties of such polar groups depend on the characteristics of polymer, plasma and plasma-forming gas.
Results and Discussion Artificial materials, designed to restore and temporary replace affected cardiovascular structures, should be made of non-toxic biocompatible polymers.
Experience and prospects of applying, Collection of scientific papers, RSC «Applied Chemistry», St.

The X-Ray diffraction patterns for Mo supported catalysts (Fig.1) show the absence of MgO diffraction peaks at lower loading of MgO which indicates that the γ-Al2O3 structure remains intact.
The first peak is attributed to the reduction of Mo+6 to Mo+4 species of polymeric Mo structures.
Lin, Journal of Natural Gas Chemistry Vol. 17 (2008), p. 201-207

Study on Syntheses and Anticoagulant Action of Rare Earth Ternary Complexes with Tryptophan and Sodium Citrate Kunjie Wang1a, Yanping Wu 1b, Hongxia Li*1c, Deyi Zhang1d, Huixia Feng1e, Yi Wang1f and YuMin Song2g 1 College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China 2 College of Chemistry and Chemical Engineering, Northwest Normal University, LanZhou, 730070, China awangkj80@163.com, bwuyanping1012@126.com, clhxwkj790425@163.com, d xixizhang@lut.cn, efenghx66@163.com, f wangyi@lut.cn, gsongym@nwnu.edu.cn Keywords: Rare Earth Ternary Complex; Amino Acid; Sodium Citrate; Anticoagulant Action Abstract.
Based on the above studies, a tentative coordination structure for the complexes is proposed (Scheme 1).
Scheme 1 The proposed structure of rare earth complexes The results of anticoagulation time were showen in table 5 (P＜0.05).

The crystalline structure was analyzed by X-ray diffraction(XRD) using CuKα radiation (Shimadzu, XRD-7000).
Das, Effect of powder, chemistry and morphology on the dielectric properties of liquid-phase-sinted alumina.
Structure and microwave dielectric behavior of A‐Site‐Doped Sr(1−1.5x)CexTiO3 ceramics system, J.

Nowadays, these functions are being realized through microelectronic devices and electrical wiring that are integrated or embedded in textile structures [ 1] which induces separate processing conditions and requirements for the textile and the electrical device/wiring.
Conclusions The electrical conductivity of the mono-filaments developed is not satisfactory due to the structure homogeneity problems and the possible aggregation of conductive materials.
Materials Chemistry and Physics, (2006), Vol.100, pp. 132- 137 [ 7] JL.

Jiang1,c 1 Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China a sunqiu@hit.edu.cn, b cchem@hit.edu.cn, c jiangzhaohua@hit.edu.cn ¶ Corresponding author Keywords: Synthesis, PZT nanocrystalline powders, Sol-gel, Rare earth, Doping Abstract.
As a result, crystallization of PZT powders takes place at 475 .C, and perovskite structure is established above 530°C Further increase in temperature or heating time will promote crystallization of PZT ceramic powders.
One is the difference in the radii between Yb 3+ (0.101nm) and Pb 2+ (0.133nm), which could directly lead to a contract deformation at constant volume; the other is the difference in the valency between Yb3+ and Pb2+ , which could result in vacancies in some of A sites and B sites in order to maintain electrical neutrality in the structure.

The general formula of Na-β-alumina and Na-β"-alumina are Na1+xAl11O17+(x/2) (0.15 to 0.3) and Na1+xMgxAl11-xO17 (0.67) [2] and crystal structure have unit cell hexagonal (P63/mmc) and rhombohedral (R3m), respectively [3].
It is noted that electrical conductivity of Na-β"-alumina is sensitive to crystal structure Na + concentration and microstructure.
Toraya, Jounal of Physics and Chemistry 0f Solids, 60 (1999), p. 729-735

The Study on the Interaction Conditions of Water-soluble Chitosan with Bovine Serum Albumin Huang Shanshan, Qu Fengzuo , Xu Tongkuan, Cui Li College of Chemistry & Materials, Dalian polytechnic university, Dalian, 116034, PR China E-mail: xutk@dlpu.edu.cn Keywords: Water-soluble chitosans; Bovine serum albumin; Three-dimensional fluorescence spectrum; Ultraviolet spectrum Abstract.
Chitin has many excellent properties and has been widely used in cosmetics, food, medicine, agricultural, environmental protection etc., because its renewability biocompatibility and many kinds of active group in its structure [1~3].
So it not only can improve the sensitivity of measurement and selectivity of molecular structure, but also can show the fluorescence information more fully.

Both materials have plate-like structure.
The particles appeared as plate-like structure which contributed smaller surface area for the geopolymerization process.
Geopolymer chemistry and properties.