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The SEM of the microstructures shows that microstructure of cement paste are changed by active mineral admixture, the internal structure of the cement paste are improved.
The microstructure of hydrated Portland cement pastes varies considerably with such factors as the chemistry and fineness of the cement used, the water to cement ratio, the use of chemical admixtures, variations in mixing procedures, differences in early curing temperatures, and variations in hydration conditions [5].
This provides the ability to see how the individual features fit together in the total structure, an ability that is difficult or impossible with other modes of electron microscopy.
The SEM of cement paste shows the internal structures so as to investigate the effect of mineral admixtures.

The copolymer of styrene-maleic anhydride(SMA) was synthesized by free radical solution polymerization using benzoyl peroxide(BPO) as initiator, toluene as solvent, the hydrolytic styrene-maleic anhydride copolymer (HSMA) was obtained by hydrolysis with Sodium hydroxide solution, the structure of HSMA was characterized by FI-IR.
The structure of SMH was characterized and analyzed with Nicolet-5700 infrared spectrometer by KBr tablet method.
The anti-backstaining capability of the HMSA is attributed to the structure of HSMA.
Zhou: Polymer Chemistry Experiment, Hefei: Anhui Science & Technology Press,1987(In Chinese) [7] W.

All structures were burned at 850 °C and then grounded to powder.
The structures thus formed are arranged in layers, fibres, palisade or other structures.
The characteristics of the structure do not differ significantly.
Part of fractal structure with apparent crystalline formations.
Journal of Materials Chemistry B. 5(8), (2017)1658–1663

It was found that increasing the sintering temperature decreases the pore size, resulting in a denser structure of hydroxyapatite and decrease in surface roughness of the coating.
It is observed that by increasing the sintering temperature, the porosity size and its percentage decreased, and a denser structure was obtained.
The results showed that increasing the sintering temperature produced a denser structure of hydroxyapatite as well as decreasing the surface roughness.
Chin: Materials Chemistry and Physics 74 (2002), p.p. 245–250

The chemical composition as well as the grain size of raw materials and the sintering temperature have major influence on the pore structure of the final material.
A metastable pore structure is formed within 60 minutes during the pore formation process.
For this purpose kaolin was used for slip preparation and designing the porous structure.
The Zeta potential of the used raw materials has a major influence on the pore structure and properties of the sintered materials.
In suspensions of raw materials, which have much more negative zeta potential, i.e. kaolin and alumina, porous structure with larger pore sizes are formed.

Their crystal structure possesses two distinct planes [47, 48].
The synthesis method also influences the mechanical properties, surface chemistry, purity, and bioproperties of the products [4, 108, 109].
Ezekiel et al. [122] also concluded that CHA prepared through nanoemulsion exhibits a similar level of crystallinity and chemistry to biological apatites.
Basirun, Wet chemistry approach to the preparation of tantalum-doped hydroxyapatite: Dopant content effects, Ceram.
Lussi, Understanding the Chemistry of Dental Erosion, Monogr.

Composite ceramics made of spinel structure NiMn2O4 and CaO-doped perovskite structure LaMnO3 were prepared by a conventional solid state reaction and sintered at different temperatures.
The XRD patterns have shown that the major phases presented in the sintered samples are NiMn2O4 compounds with the spinel structure, La1-xCaxMnO3 with the perovskite structure and NiO with a monoclinic structure.
This paper is to report the phase composition, microstructure and electrical properties of the spinel structure NiMn2O4 in composites with perovskite structure LaMnO3 doped by CaO.
The composite ceramics consist of cubic structure spinel phase, orthorhombic structure perovskite phase and a slight amount of monoclinic structure NiO separating out of the spinel phase NiMn2O4 matrix.
The other reason is that the radius of Ca2+ is smaller than La3+ in the perovskite structure.

Box 385 Touliu, Yunlin 640, Taiwan 2 Department of Applied Chemistry, Providence University, Taichung 43301, Taiwan a mttsai@ms23.hinet.net Keywords: Sol-gel, AZO film, Textural evolution, Precursor Abstract.
All the undoped and doped xerogel films were amorphous and converted into zincite structure after firing at 200 oC, irrespective of precursor types and dopant amounts.
Figure 1 shows that all the undoped and doped films are amorphous after drying and convert into zincite structure after firing at 200 oC, irrespective of different precur- sors and dopant amounts.

Synthesis and Properties of [1-(2-Methyl-5-pheyl-3-thienyl)-2-(2-methyl-5-(4-cyanophenyl)-3-thienyl] perfluorocyclopentene for Fluorescence Switch Hongjing Jia, Xugang Tang and Shouzhi Pu * Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
A novel unsymmetrical photochromic diarylethene 1o, which is named [1-(2-Methyl-5-pheyl-3-thienyl)-2-(2-methyl-5-(4-cyanophenyl)-3-thienyl]perfluorocyclopentene, was synthesized and its structure authenticated.
The structure of compound 1o was confirmed by 1H NMR spectroscopy.

Development of microcapsules containing oil-based contrast medium Masumi Uehara1,2,a, Syotaro Hamakawa2,b, Yasuyuki Maki2,c and Toshiaki Dobashi2,d 1School of Radiological Technology, Gunma Prefectural College of Health Sciences, Maebashi, Gunma 371-0052, Japan 2Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan auehara@gchs.ac.jp, borionchildfairy@yahoo.co.jp, cmaki@chem-bio.gunma-u.ac.jp, ddobashi@chem-bio.gunma-u.ac.jp Key words: microcapsule, contrast medium, transcatheter arterial embolization therapy.
Since the wall membrane is swollen by the inner core, the structure depends on the core materials [8,9].
This surface structure could have an advantage to enclose drugs in them by soaking it into drug solutions.