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Hu [3] took coprecipitation directly synthesize the monoclinic structure Ag3VO4 photocatalytic environmental purification materials, and examined its photocatalytic activity of degradation of Acid Red B in visible light. under the conditions of NiO as the catalyst, the degradation rate of Acid Red B can be enhanced by 3.8 times.
Usually high crystallinity compared to amorphous structure is conducive to photo-electron and hole migration and separation, but when the temperature exceeds 773 K, Ag3VO4 crystallinity declining, making the effect of the production and the separation of electrons and holes reducing.
Semiconductors as their unique band structure of materials can be used as photocatalytic materials.
Therefore, the minimum amount of catalyst which can make the reaction rate near the maximum value in practical applications have a relation with the catalyst itself, the reactor structure and a variety of reaction conditions.
Wang, Charaterization of mesoporous nanocrystalline TiO2 photocatalysts synthesized via a Sol-solvothermal process at a low temperature, Journal of Solid Chemistry, 178(2005) 321-328

The development of biomaterials may potentially mimic extracellular matrix (ECM) structure, chemical composition, and mechanical properties, which are involved in survival, spread, and proliferation of the cells.
The chemistry of a scaffold, especially the surface chemistry of it, plays a crucial role in its biocompatibility and the cell attachment on it.
The molecular structure of 1000PEOT70PBT30 is shown in Fig.1.
The structure of PEOT/PBT copolymer.
Meanwhile, the nitrogenous functional groups on the surface was mainly composed of the amine groups (-NH2) and amide groups (-CONH) with the characteristic binding energies at 398.9ev and 399.7ev (Table 4), which was in accordance with the molecular structure of silk fibroin.

(6) According to the throat radius and fracture width of the reservoir, choose the particle tracer, so as to realize the accurate description of the fracture and pore structure.
Thus, the injection water mixed with particle will enter the low permeable layer and particle tracer can be into the more small microcracks and pores, which improves the swept volume and describes more veritably reservoir fracture and pore structure in the greater scope
Preparation of Monitoring Information. (1) Be familiar with reservoir minerals, reservoir physical parameters and pore structure in the well area. (2) Understand the injection and production dynamic of injection wells and oil wells in the well groups. (3) Estimate the time of particle tracer reaching the monitoring well. (4) Analyze the particle mineral physical parameters with flow.
Then, analyze and compare the samples under the microscope, conclude the particle form and granularity structure, analyze the chemical composition of the particles with EDS and recognize the particles.
It is the important developing direction of particle tracer development, which is the preparation of low density and easy identification particles (such as a fluorescent particle of silica shell) through combining the organic chemistry, biology or physical chemistry.

It has been shown by experiments and simulations that CNTs have a stiffness of up to 1000 GPa, strength in the order of 100 GPa and thermal conductivity of up to 6000 W/mK depending on its structure.
Filler material/ selection, in terms of the structure, quality and purity of the nanofiller material plays an important role.
Due to the scale of the dimensions it was impossible to verify the micro-chemistry using SEM EDS techniques.
Further additional studies using Transmission Electron Microscopy (TEM) are necessary to confirm the structure and chemistry of these particles and a quantitative analysis is required to determine the effectiveness of this processing route in introducing the particles.
Bacon, Growth, Structure, and Properties of Graphite Whiskers, J.

By increasing the betaine and SQAS ratio in the blend solution, the content of porous structures decreased and more large and separate lamellar structures formed in Betaine/SF hydrogels.
On the contrary, by increasing the AES ratio in the blend solution, the content of large and separate lamellar structures decreased and more compact porous structures formed in AES/SF hydrogels.
Structure and properties of silk hydrogels.
State of Water, Molecular Structure, and Cytotoxicity of Silk Hydrogels.
Surfactant systems: Their chemistry, pharmacy, and biology, Chapman and Hall, London and New York, 1983

The absorption of microwave energy has very close relationship with the structure and property of material.
The results showed that either the microwave power or the molecular structure of materials had significant effects on the heating rate.
The relationship between temperature-rise behavior of different materials and the material structures were discussed through studying the difference of molecular structures, which led to the conclusion that the more structure defects in the crystal, the faster the heating rate was. 1.
The fast microwave heating characteristics of V2O5 can be explained by theory of defect structure.
[7] Q H Jin (Eds.): Microwave Chemistry, Science Press, Beijing, PRC (1999), P. 13-16

The experiment results indicate that the crystal structure of the samples is fcc structure as same as that of the bulk materials.
It can be indexed to the reflection of fcc structure, this result was also investigated by means of X-ray diffraction.
Due to the small size effect and incomplete inner structure of the particle, the XRD diffraction peaks are low and wide.
The crystal structure of the samples is fcc structure as same as the bulk materials, the specific surface area is 11 m2/g, the particle size distribution ranging from 30 to 90 nm with average size 66nm, the average particle size obtained from TEM and confirmed from XRD and BET results.
G., Synthesis of nitride-iron nano meter powder by thermal chemical vapor-phase reaction method, Journal of Inorganic Chemistry, 1996, 12(1): 88

Effect of hydrogen peroxide detemplation on the structure and acid properties of MCM-56 zeolite Fei Zhao1, Yu Zhang1, a, Haijun Xing2, Mingjun Jia2, Tonghao Wu2 1Dept. of Materials Engineering, Jilin Institute of Chemical Technology, Jilin City 132022 China; 2 College of Chemistry, Jilin University, Changchun City 130023 China.
Introduction MWW structure zeolite was first invented by Mobil in 1990 [1], which consists of two non-intersecting pore systems, both accessible through 10-membered rings.
Previous studies [3-5] suggest that the main active sites are the protonic sites located in the external surface cups of MWW structure zeolite.
As MCM-56 and MCM-22 all share the MWW structure, MCM-56 exhibits some similarities with MCM-22, including the sinusoidal network channel and a large number of 12 MR cups.
In the present work, the structure and acid properties of MCM-56 detemplated by hydrogen peroxide post-treatment was studied in comparison with calcinations treatment.

Tourmaline is characterized by a cyclic structure of boron silicate mineral , with significant pyroelectricity and piezoelectricity [4].
From SEM observation, the structure of the biofilm attached to TPU and PU carriers appeared to be slightly different (Fig. 4).
The stability of microbial community structure of PU biofilm system was lower than that of TPU biofilm system.
Huppertz: Associating borate and silicate chemistry by extreme conditions: high-pressure synthesis, crystal structure, and properties of the new borates RE3B5O12(RE=Er-Lu).
Zhu: Impact of calcium on biofilm morphology, structure, detachment and performance in denitrifying fluidized bed bioreactors (DFBBRs).

In this study, the regenerator of a 55W Stirling engine was calculated using the 1D numerical model to find the most efficient porous media from kinds of options with different structures and different parameters.
The porous properties are highly related to the morphology of porous structure, namely, the distribution of pores, pore sizes, pore shapes and pore volumes[3-7].
In general, there are four kinds of geometries (or structures) of porous medium, they are: (1),woven screen matrix geometry, (2),random fiber matrix geometry, (3),packed sphere matrix geometry, and (4),wrapped foil matrix geometry.
Zhao: Journal of Material Chemistry, Vol.16 (2006), p.623-625