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Theoretical Method Method B3LYP put the three parameter method Becke and method LYP together, functional expression is: , It is a kind of hybrid functional method, widely used in quantum chemistry calculation.
All of the molecular structures were calculated by Gaussian03.
Figure 2: C5H8O+ ion ground state stable structures Using C5H8O+ optimum structure as input in the coordinate and the CIS method, the 6-31+g(d, p)basis sets to calculate the configuration of different excited state vibration frequencies. 
Molecular structure: Fig. 1: The mass spectrum The calculating results agree with the experimental data, and the mass spectrum peak of C2H3+ fragments is the highest, the formation of C2H3+ fragments is the largest possible way.
The basic principles of quantum chemistry and ab initio calculation [M].Beijing: Science press, 1985 [3] Lubman D M, Naaman R, Zare R N.

The use of polymeric concrete is particularly suitable for the manufacture of corrosion and frost-resistant structures.
Polymeric Composite Materials: Structure, Properties, Technology, Profession, Petersburg, 2009
Duvis, Transition properties of pretreated asbestos-filled epoxy polymers, Materials Chemistry and Physics. 17 (1987) 531-540
Redyushev, The processes of formation and the basic properties of hollow aluminosilicate microspheres in fly-ashes of thermal power plants, Chemistry of a solid. 2 (2008) 53-66
Anshits, Obtaining cenospheres from energy evils of stabilized composition and their properties, Chemistry for Sustainable Development. 9 (2001) 379-391

In the AB2O4 spinel crystal structure oxygen forms a regular structure of highest density arrangement.
A variation of this structure is the B[AB]O4 reverse spinel structure where half of the B cations are located in the tetrahedral gaps.
They have the structure of spinels or perovskites.
Budniok, Proc. of the 5th International Symposium-Chemistry Forum 1998, Faculty of Chemistry, Warsaw University of Technology, Warszawa 27-29 April (1998), Poland
Budniok, Proc. of the 6th International Symposium-Chemistry Forum 1999, Faculty of Chemistry, Warsaw University of Technology, Warszawa 19-21 April (1999), Poland

Gum elastomers of different structures and corresponding materials filled with carbon black, as reinforcing filler, are investigated experimentally.
First, it is the presence of macromolecular structures in all hyperelastic systems.
Elastomer network is of fractal structure, as well as a random network of conductors and resistors [5].
Flory, Principles of Polymer Chemistry (Cornell Univ.
Avnir Ed., The Fractal Approach to Heterogeneous Chemistry (Wiley, USA 1989)

Synthesis of biodegradable hydroxy-functionalized poly(oligo(ethylene oxide) monomethyl ether methacrylate) (HO-POEOMA) polymer by inverse miniemulsion ATRP Linping Zheng1,2,a, Qianqian You1,b, Puyu Zhang1,c* 1Institute of Fine Chemistry and Engineering, College of Chemistry and Chemical Engineering, Henan University, China P.R., 475004 2Parmaceutical College of Henan University, China P.R., 475004 ayouqian710@yahoo.com.cn, byouqian710@163.com, czhangpuyu@henu.edu.cn Keywords: ATRP; inverse miniemulsion; biodegradable.
The chain structure and component of such polymer is characterized by spectroscopic studies (1HNMR, IR and GPC).

The structure of data module.
The structure of ICN is seen as Figure2.
The XML file is structured and directly saved.
Jónsson, in: Theoretical Methods in Condensed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Forming the composite structure is difficult.
Such inappropriate corrosion rate cannot generate the composite structure.
The composite structure was studied through the two-step anodization.
Chemistry, 2006, 178(1): 8-15 [5] Sheng-Lian Luo, Li-Xia Yang.
Journal of Physical Chemistry C, 2007, 111(41): 14992-14997 [10] Z Wu, S Guo, H Wang, et al.

LDH are considered an anionic clays with a layered structure consisting of divalent and trivalent metal cation hydroxides [31].
They addressed the question of how does the structure and chemistry of different types of LDH samples affect their adsorption performance for MO.
Part of the Zn in the crystal structure was substituted by both Co and Ni.
Scanning electron microscope images showing the layered structure of Fe-Zn-Co-Ni LDH (a) before and (b) after MO adsorption.
Additionally, some pore structure was also found, which will be advantageous for the electrolyte diffusion [48].

The apparatus have advantages of low consumption of agentia, short extraction time, high enrichment efficiency, simple structure, convenience in usage and low operating costs.
That modern sample pretreatment methods and analytical apparatus can not be a good match, which limits the development of analytical chemistry.
Therefore, developing sample pretreatment method which can match with modern analytical apparatus is the trend of analytical chemistry.
Fig6 GC-MS TICs of the volatile oil that extracted from the leaf of Thuja koraiensis Nakai Conclusion Sample pretreatment plays an important role in analytical chemistry and the progress of which has a great influence on the development of analytical chemistry.
Analytical Chemistry, 1996, 68(13): 2236-2240 [3] Sun S H, Cheng Z H, Xie J P.

Nowadays, there has been an increasing interest in the synthesis and characterization of the structure and physical properties of heavy metal oxide (HMO) glasses, due to their high density and high infrared transparency and good radiation shielding [4].
Reengineering XCOM Radiation Physics and Chemistry, 60 (2001), pp. 23–24
Chewpraditkul Physical, optical, structural and gamma-ray shielding properties of lead sodium borate glasses, Journal of Physics and Chemistry of Solids, 72 (2011), pp. 245–251
Journal of Physics and Chemistry of Solids, 41 (2006), pp. 84–88