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Also microstructure, flexural strength of the SiC preform and SiCp/Al composite were studied, the results showed gel casting process and pressureless infiltration technique were suitable for fabricating high volume fraction, homogeneous structure and high performance SiCp/Al composite.
It was based on traditional forming method and polymer chemistry.

The chemical structure of the product was identified by 1H NMR spectroscopy and IR spectrum.
Serebryakova: submitted to Journal of khimicheskie Volokna. (1996) [6] Shigekatsu S, Japan Patent 2,002,235,009. (2002) [7] Hamanaka H, Kakizaki T, Yokkaichi, US Patent 5,002,991. (199l) [8] Shigekatu S, US Patent 20,040,132,879. (2004) [9] Mathis R and Gross D: submitted to Journal of Chemistry Fibers Intermation. (1998) [10] Raymundo A, Empis J and Sousa I: submitted to Journal of Food Engineering. (1998) [11] Piispanen PS, Persson M, Claesson M, Norin T: submitted to Journal of Surfact Deterg. (2004)

To increase efficiency of performance, using immobilizing processes in the structure of an enzyme electrode is very important.
Nil Ertaş : Food Chemistry Vol. 101 (2007) 1540-1544

Effect of Y and Zn substitution on tensile properties of 6H-type LPSO phase in Mg97Zn1Y2 alloy Ping-Ying Tang1, Bi-Yu Tang1,2, a, Li-Ming Peng3, Wen-Jiang Ding3 1School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China 2Department of Physics, Xiangtan University, Hunan Province, 411105, China 3Light Alloy Net Forming National Engineering Research Center, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai, 200030, China atangbiyu@gxu.edu.cn Keywords: Stress-strain relation; Ideal tensile strength; LPSO phase; First-principles calculations; Electronic structures Abstract.
The total energy of the structures was minimized by relaxing the structural parameters using a quasi-Newton method [28].
The convergence test showed that the error for the total energy is less than 1meV/atom and the residual stresses in the fully relaxed structures is less than 0.1 GPa.
Phase Mg Mg95Y Mg95Zn Ideal tensile strength [GPa] 2.30 1.96 2.37 Critical tensile strain 0.10 0.08 0.09 Electronic structures.
Moreover, the electronic structures indicate that with substitution of single Y or Zn atom, the stability of the phases is lowered as the engineering strain increase.

So then, in the next freeze time, they could form another triple helix structure.
The structure of the membrane seemed to have significant role for this permeability.
The crystallinity of triple helix structure is not as rigid as inorganic crystal structure.
In the gelatin membrane, the crystallinity of triple helix structure still had enough elasticity because of its hydrogen bond as the basic bond which forming this structure.
Putra, Structural organization of poly(vinyl alcohol) hydrogels obtained by freezing/thawing and γ-irradiation processes: A small-angle neutron scattering (SANS) study, Procedia Chemistry, 4 (2012) 186-193

With the help of SEM and mercury intrusion apparatus, the morphology of the hydrates and the pore structure of the cement mortars were observed.
In some cases, various internal and external factors may cause the durability of cement materials decreased, and cause the structures of concrete damaged even disastrous accidents[1].
However, compared to portland cement, the composition of sulphoaluminate cement belongs to another physical chemistry system, which is mainly 3CaO·3Al2O3·CaSO4 minerals. 3CaO·3Al2O3·CaSO4 minerals endow sulphoaluminate cement many specific properties, such as early strength, high strength, frost resistance, impermeability, corrosion resistance and low alkalinity[7-8], therefore sulphoaluminate cement has a broad developing and application prospect.
In contrast, the structure of modified mortar is compactly joined with each other when redispersible polymer powders is added.
Results of pore structure analysis Table.4 shows the pore structure of the samples of 28 day cured redispersible polymer powders modified mortars.

FE-SEM helped to observe the cauliflower structure of HA and DRX showed that crystalline phases formed after heat treatment were ( and owing both to the crystallization and combination of the bioactive glass and β-TCP .
Calcium phosphate-based ceramics have been proved to be an excellent alternative material for bone tissue engineering applications because their crystalline structure and chemistry allow the precipitation of hydroxyapatite (HA) on their surface and the joining with the bone [1–3].
The scaffolds with zirconia showed a larger precipitation of HA on their surface than the samples without zirconia; furthermore, bar-like shape HA grains as well as cauliflower-type structure HA can be observed in Fig. 3.
Hidroxyapatite formation on the surface of scaffolds was evident since day 3 of immersion in SBF with an initial Ca/P ratio of 2 that equilibrated at 1.75, with a final cauliflower-type structure.
Zanotto, Sol–gel synthesis, structure, sintering and properties of bioactive and inert nano-apatite–zirconia glass–ceramics, Ceram.

The phase, pore structure and surface acidity of the catalyst samples were characterized by X-ray diffraction (XRD), N2 sorption and NH3 temperature programmed desorption (NH3-TPD) respectively.
Since the compounds with NZP structure can produce acid center and acid site [7] due to hydroxyl group (P-OH) in the surface, it is possible to be used as a new type of acid catalyst.
However, surface acidity of NZP compounds with mesoporous structure is very weak comparing with zeolite.
The main peaks in the XRD pattern of HPW-CZP-20 was almost same with CZP which highlighted the introduction of HPW did not modify the crystal structure of CZP, and it also indicated that HPW was dispersed on the CZP surface and mixed with CZP very well [10].
,Vol.92 (2006), p.270 [20] Xu R R, Pang W Q, Yu J H, Huo Q H, Chen J SH .Chemistry-Zeolites and porous materials, edited by Science Press, Beijing(2004),in press.

Finally a triboluminescent unit with squirrel cage structure is constructed to realize the triboluminescence of multiple glass bars against on the cylindrical phosphor in the manner of sliding friction.
As the development of TL study, some of applications related only to ML materials have been reported in stress sensor, especially realtime visualization monitoring of stress field in large structure, as well as novel ML driven photocell system, and so on [1,2].
Design of squirrel cage structure Fig. 6.
Scheme of TL Unit with squirrel cage structure.
A triboluminescent unit with squirrel cage structure is constructed on the basis of tribo- luminescence process in the sliding friction.

XRD, SEM and EPMA analyses reveal crystalline phase characterized by a Bi-layered perovskite structure of Bi4Ti3O12 and the distribution of every element is uniform.
It is evident that the Bi-layered perovskite structure has been maintained after substitution of Pr for Bi with the present amount.
In fact, the Bi-layer perovskite structure is maintained even the component y of rare earth element La reaches as high as 1.5 in Bi4-xLaxTi3O12 [11].
The results of XRD, SEM and EMPA reveal that Pr-doped bismuth titanates maintain the layered perovskite structure of Bi4Ti3O12.
Chemistry and Phys. 98 (2006) 481-485