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X-ray crystallography shows that the crystal structure is stabilized by intermolecular C-H···π interactions and it contains plenty of conjugated double bonds.
The x-ray analysis of the structure revealed that it is a highly symmetrical structure, and it is stabilized by conjugated double bonds and intermolecular C-H···π interactions.
The crystal structure is very likely to be stabilized by intermolecular C-H···π interactions (Fig. 1).
The structure of compound 1 is determined by X-ray crystallography.
The UV-vis spectra, fluorescent spectrum and Raman spectrum further confirm the structure.

This conclusion can propose theoretical foundation for design of concrete structures in cold environment Introduction In practical engineering, most of concrete structures are in a multiaxial stress state.
The existing research results show that the bearing capacity of concrete structure at normal temperatures under biaxial compression is higher than that under uniaxial compression.
But concrete structure under biaxial tension-compression is going into reverse.
Therefore, it is not reasonable to analyze concrete structure under multiaxial stress state following uniaxial design theory.
Durability of concrete the crossroad between chemistry and mechanics.

Microstructure studies indicate that all of BTT films with well-developed rod-like grains consist of single phase of a bismuth-layered structure without preferred orientation.
According to the results, it is possible that the Bi-layered structure is always maintained in BTT and is rather insensitive to the amount of Tb.
All the films consist of a single phase of Bi-layered perovskite structure.
Taso, Effect of titanium substitution on film structure and ferroelectric properties of Sr-deficient Sr0.75Bi2.35Ta2O9 thin films, Thin Solid Films, 422 (2002) 186-192
Chemistry and Phys. 98 (2006) 481-485

The chemical structure of BBIB was confirmed by FT-IR, high resolution mass spectrometry (HRMS) and NMR spectroscopy.
Thereby more efforts have been made to modify the polymer structures to improve the solubility.
Scheme 1 Synthesis of BBIB Chemical structure of BBIB is confirmed by FT-IR, HRMS, and NMR spectral date.
Furthermore, the m/e of the fragments in high resolution mass measurements is in agreement with the predicted structures of the monomer.
Scheme 2 Synthesis of PNABIS The structure of PNABIS was confirmed by FT-IR and NMR spectral data.

Li1,b 1 Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, Shenyang 110004, P.
Three point bending fatigue tests demonstrated that this kind of the shells with a special structure comprising mineral and organic matrix can experience the repeated loads instead of immediate breaking.
However in 1978, Boresi et al. [6] pointed out that in some materials with structures made of brittle stuff, such as concrete beams and the bivalve shells, small cracks would grow until they reached a size if the structure was repeatedly loaded and unloaded.
The hierarchical structure with organic materials can prolong the cracking path and make the fatigue tests possible.
Secondary cracks can also be caused by the fatigue tests and the hierarchical structure of the shell with tough organic matrix and hard mineral lamellae could be a reason for the successful fatigue tests.

The crystalline structure of the powders was characterization by X-ray diffractometer.
Structure and ferroelectric behavior.
The powders after grinding for 2 h have a typical perovskite phase with a polycrystalline structure.
The powders have a typically perovskite structure by XRD.
Tang: Materials Chemistry and Physics Vol. 115 (2009), p. 507 [10] S.

For this work we calculated both band structure and DOS with and without the relativistic effects.
The symmetry lines are those as in the zincblende structure.
Structure stability and carrier localization in CdX(X=S, Se, Te) Semiconductors, Phys.
Quarsiparticle Band Structure of Six II-Vi Compounds: ZnS, ZnSe, ZnTe, CdS, CdSe and CdTe, Phys.
Full-potential investigation of the electronic and optical properties of stressed CdTe and ZnTe, Materials Chemistry and Physics, 92 (2005) 333–339

The microstructure, cross-section morphology ，distribution of alloy element and phase structure of diffusion layer were tested and observed.
A new phase was formed on the surface with the continuous infiltration of alloying elements, which was difference with the structure matrix, resulting in the diffusion line .The grain of diffusion layer was significantly small than the grain of matrix.
As there were no new grain formation or the block of second phase in the process of the growing up of α phase, the grain were paralleling with each other and straight inward grew up, so the formation of diffusion layer were the structure of columnar grain.
（a） （b） Fig.3 Distribution of elements in the alloy diffusion layer 2.3 The phase structure of alloy diffusion layer The phase of alloy diffusion layer detect with Bruker-axs-D8 X-ray diffraction, the test results shown in figure.4.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (50764002); Guangxi Key Laboratory of Information Materials research (Gui 0710908-06-Z) and Guangxi Natural Science Foundation of China (2010GXNSFD013008) References [1] Guangxian.X:Rare Earth(Metallurgical Industry Press, China 2002 ) [2] Huaren.ZH: Rare Earth Chemistry Heat Treatment of Steel(National Defence Industry Press, China 1998) [3] MartiniC,PalombariniG and PoliG: submitted to Weaing(2004)

When the temperature increasing from 100 ºC to 1000 ºC, the structure of the geopolymer experienced first loosen and then tighten.
With temperature increasing from 100 ºC to 500 ºC, the porosity increases because of losing constitution water which results in loose structure.
When the calcined temperature is higher than 600 ºC, the porous structure starts to be collapsed and the structure of the geopoymer changes compact, which results in the density increases.
The pore and cracks appeared at 300 ºC, which resulted in loose structure of geopolymer.
The photograph also depicted the structure changes resulting in physical properties.

College of Chemistry & Chemical Engineering, Xiamen University, Xiamen, China, 361005; 3.
The polycrystal structures, surface morphologies and composition of V2O5 films were characterized and analyzed.
Afterward, the photoresist was removed with acetone forming the full microbattery structure.
DISCUSSIO� 3.1 Structure and morphology of V2O5 film An XRD analysis was performed and the results are shown in Fig. 2.
CO�CLUSIO�S The V2O5 films acted as anode electrode and the microscale lithium batteries with the structure of V2O5 /LiPON /LiCoO2 were fabricated.