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The results show that the zeolite 13X@SiO2 core-shells structures have been prepared and their properties are maintained even after the modification.
This indicated that the surface modification did not cause the structure collapse, and the original structure of zeolite 13X was well maintained.
Therefore, we concluded that preparation of core-shell microsphere13X@SiO2 had added more –OH groups without breaking the structures of zeolites.
The XRD and morphology analysis showed that the coating on the zeolite 13X was complete, and the core-shell structure exhibited high crystallinity.
Zheng, Progress in the preparation, characterization and applications of core-shell composite zeolites, Chemistry, 4 (2008) 249-255

This facilitates the formation of wide mesophase pitch structures in thermal conversion.
Utilizing the effect of magnetic field on coal tar pitch, Zhao and Wang improved the layered structure of mesophase pitch [1].
The quality of needle coke is dependent on the temperature, current, intensity of magnetic field, and magnetic flux conditions during production, requiring research in the physics, electromagnetism, and materials chemistry of this process.
The mesophase is the precursor of needle coke, playing a decisive role on the fiber structure and the physical properties of needle coke.
SEM2 of a coal-based needle coke To obtain better microscopic structure and composition in needle cokes, it is important to choose good quality raw materials.

Fourier Transform Infrared Spectroscopy (FTIR) and nuclear magnetic resonance (NMR) were applied to characterize the molecular structure of bis-BENR (or bis-PHNR).
Dynamic FTIR showed that the two novolac resins reacted with epoxy resins and formed a crosslinking network structure.
The synthetical route and the structure of the two novolac resins were shown in Figure 1.
In epoxy resins: Chemistry and technology.
Paint chemistry and principles of paint technology.

The XRD pattern shown the crystalline structure and the SEM image observed that the distribution of CNTs was homogeneous between carbon particles.
The diffraction peaks at 2 theta of 25.66° and 42.50° can be attributed to the (002) and (100) planes of AC-CNT with hexagonal graphite structure [12].
The intensity of the MnO2 peaks is lower, indicating amorphous structure.
The stability of α-MnO2 structure is dependent on the protonation effect of the crystal.
The presence of H+ ions will support and stabilize cavities in the crystal structure of α-MnO2.

It is observed that the silver powder has similarly spherica1 structure about 3μm in diameter and the silver tin oxide composite powder is mostly of irregular flake structure with about 0.3μm in thickness.
So Na2SnO3 has played a key role in the formation of the flake structure.
While Ag(SO3)23- is a kind of two-coordinate complex and its spatial structure is linear.
Fig.5 is the dimensional structures of Ag(SO3)23- and Sn(OH)62- complex ion.
Dean, Lange’s Handbook of Chemistry, Fifteenth edition, 1998, 8.5

Recently, many publications on the effect of carbon nanotubes (CNT) in the processes of cement composites structure [2, 3].
Investigations were carried out jointly with experts of Surface Chemistry Institute NAS of Ukraine [12].
Were investigated the processes of structure using electron microscope.
Such properties can be successfully used in design of mortar applied to structure in a thin layer - protective coatings, as well as to create a fine-grained, dispersion reinforced thin layer of concrete structures.
We must to improved the structure of cement composition at all levels - microlevel, mezolevel and macrolevel.

The wood dyeing effect of reactive dyes is not only concerned with the dyeing process, also the wood structure and the structure of reactive dyes[5].
The process research on wood dyeing with reactive dyes is more reported[6-7], but the effect of the type and structure of reactive dyes on the wood dyeing effect is rarely reported.
Results and discussion The structure of reactive yellow dyes.
Reactive Yellow 146） Fig.2 Structure of reactive yellow dyes [8] UV-Vis absorption spectrum of reactive yellow dye solution.
Dye Chemistry[M].

XRD analysis was also performed to characterize the chemical structures of the scaffolds.
Polycaprolactone pallets (CelgreenH7, Daicel Chemistry Industries Co., Mw=105g.mol-1) were dissolved in 1,4 dioxane (Kishida Chemical CO., Ltd.
(a)-(f) show inter-connected pore structures of HA, and the HA/PCL scaffolds also show porous PCL structures.
(a) to (f) show the entire pore structures, while (a’) to (f’) illustrate the surface morphology.
The room dried scaffolds maintained almost the same original HA framework structure.

This kind of sludge contains rich N, P, K and other nutrients and organic matter, it is good soil structure conditioner and fertilizer. so the agricultural use of sludge should be the most realistic feasible way.
The physics and chemistry nature of sludge can be shown in table 1.

Ca0.69Sr0.23(PxMoy)O4:Eu3+ phosphors with x/y = 1/2, 1/1, 2/1 are crystal materials whose crystal structure parameters are between tetragonal CaMoO4 and trigonal Ca3(PO4)2.
[7] Jianhua Lin, Xiping Jing, et al., in: Inorganic Materials Chemistry, Peking University Press, Beijing (2006).