Search results

Raman spectroscopy has been well recognized as non-destructive method to study band structure of material.
SiC thin film may attain useful blue emission for optoelectronics in nanoscale structure.
Green emission (518 nm) is the dominant emission in both sample D and E may assign 3C-SiC structure existence in the film[4].
Prakash, J., et al., Chemistry of One Dimensional Silicon Carbide Materials: Principle, Production, Application and Future Prospects.
Progress in Solid State Chemistry, 2015. 43: p. 25

It is potentially useful structure material for allplications in the aerospace, automotive, and energy production industries.
In recent years, the Ti2AlC, having layered structure, was found to have both properties of metal and ceramic like ductility and hardness [5,6].
From SEM observation of the fracture surface shown in Fig. 3, it is indicated that matrix exhibits a duplex structure consisting of the lamellar phase of α2 (Ti3Al) and colonies equiaxed γ (TiAl) phase.
From Fig. 4(a), it can be seen that the monolithic TiAl intermetallics have large grain size structure and a few pores existed.
Miyamotob: Materials Chemistry and Physics Vol. 75 (2002), p. 291 [9] C.L.

Polymer microspheres have widespread applications in standard measurement, medical immunization, biological engineering, analytical chemistry and chemical industry, due to their excellent properties of high surface area, strong adsorption and good aggregation effect.
Considering its good channel structure and adsorption properties, porous hydroxylapatite can be used as a carrier material for TiO2, heavy metals and widely used in the field of photocatalysis, inorganic antibacterial agentand and catalytic cracking.
Porous hydroxylapatite has high chemistry stability, maybe could become the most potential enzyme carrier material.
TEM measurements could provide further insights into the morphology and structure of composite nanoparticles, and TEM images of resultant nanospheres were showed in Fig. 2.
The prepared porous hydroxyapatite has high purity and porous structure, and it will become a potential material in many field, such as macromolecular adsorption, catalysis, drug storage, transportation and so on.

Mechanical and Vulcanization Behaviors of SBR/N330 and SBR/N330/PBMCN Nanocomposites Haitao Liu1,a Jingfeng Zhang1, Yiguang Tian1, Xuejun Weng2, Shie Lin3 1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang, P.R.
Smectitetype clays have a layered structure.
The rubber–clay nanocomposites prepared by the mill method were shown to have a fine dispersed phase structure and good reinforcement properties [6].
X-ray diffraction (XRD) and transmission electron microscopy(TEM) revealed the presence of intercalated, aggregated and partially exfoliated structures [9].
Lee, et al: Journal of Industrial and Engineering Chemistry Vol.14(2008), p. 60 [4] Javier Carretero-González, Haris Retsos: Macromolecules Vol. 41(2008), p. 6763 [5] Manuela L.Q.A.

Sivakumar, In-situ synthesis of biphasic calcium phosphate ceramics using microwave irradiation, Materials Chemistry and Physics 71 (2001) 272-278 15) R.A.
Tanaka, Structure Analysis of A-Type Carbonate Apatite by a Single-Crystal X-Ray Diffraction Method, Journal of Solid State Chemistry 155 (2000) 292-297. 17) S.
Liu, Location of type B carbonate ion in type A-B carbonate apatite synthesized at high pressure, Journal of Solid State Chemistry 177 (2004) 3174-318. 24) S.C.G.
Hoshikawa, Crystal structure analysis of tricalcium phosphate Ca3(PO4)2 by neutron powder diffraction, Journal of Solid State Chemistry 175 (2003) 272-277. 27) H.
Lu, Synthesis of calcium phosphate/calcium sulphate powder, Materials Chemistry and Physics 88 (2004) 285-289 34) S.

，Ltd , Huai’an, china aZyjt2004@163.com, b Cjd502@163.com, c463591532@qq.com, dHu1234i@163.com Keywords: pore structure, porosity rate, pore size distribution, strength, frost-resistance.
The influence of admixture on concrete pore structure was analyzed by using the mercury intrusion method and the rapid frozen-thaw method under the condition of the same water/binder ratio in this paper, and thus the relationship between pore structure and frost resistance of concrete were analyzed.
(1)Pore structure: the cement paste specimens of the hardened concrete are used in pore structure test.
Test results and analysis Pore ​​structure of cement stone of the designed concrete.
The physics and chemistry of Concretes[M].

Synthesis and In Vitro Anti-inflammatory Activity of Pyrrolo[1,2-a]pyrazines via Pd-catalyzed Intermolecular Cyclization Reaction Yanmei Zhou1,a, Yong Wei1,b, Jin Yang1,c,* Haihai Li1,d, Miaodeng Liu1,e and Nianyu Huang1,f,* 1Hubei Key Laboratory of Natural Products Research and Development, College of Chemistry and Life Sciences, China Three Gorges University, Yichang, Hubei 443002, China a1063596064@qq.com, bwei520yong@126.com, cjmyangjin@126.com, d799468909@qq.com, e742884150@qq.com, fhny115@126.com Keywords: Anti-inflammatory agents, IL-6 inhibitory activity, pyrrolo[1,2-a]pyrazine, synthesis, intermolecular cyclization Abstract.
Pyrrolo[1,2-a]pyrazine possessed widely bioactivities due to its particular structure.
Their structures were characterized by NMR, IR, EI-MS and elemental analysis, and all of them exhibited moderate in vitro anti-inflammatory effects with the inhibitions of 43-59% against IL-6 at 50 μM.
Results and discussion 2.1 Chemistry In an effort to expand the access to new N-heteropolycycles and study their structure-activity relationships (SAR), we studied the Pd-catalyzed intermolecular cycloisomerization strategy using propargyl amines or ethers as the key intermediates (Scheme 1).
The future studies on the structure-activity relationship of the pyrrolo[1,2-a]pyrazines and their other bioactivities were under way in our research group.

In addition, cerium (Ce) dopant did not alter crystal structure at low content.
The addition of Ce contents at 3 and 5 wt% did not alter the crystal structure of the catalyst.
This pore structure was a general characteristic of the FSP-made particles.
Comite: Physical Chemistry C Vol. 116 (2012), p. 22386 [9] W.D.
Subbarao: Chemistry CentralVol.(2011), p. 1

Fig.1 Structures of xanthan gum Experimental Materials Xanthan gum(foodgrade) was purchased from Fufeng Group Co.
Radiation degradation did not basically destroy crystal structure of xanthan gum in aqueous solution up to 120 kGy irradiation dose.
The profiles of curves a, b, c,d,e and f were similar so that we can conclude that the main polysaccharide chain structure was remained during degradation process.
Journal of Agriculture and Food Chemistry, 40(1992) 945-948 [6] Haili Liua, Chengdong Huangb, Wenxiu Donga, Yuguang Dub, Xuefang Baib and Xianzhen Lia.
Structure of the extracellular polysaccharide from Xanthomonas campestris.

Physical Chemistry Chemical Physics, 2011. 13(34): p. 15384-15402
[8] Shin, H.J., et al., Control of electronic structure of graphene by various dopants and their effects on a nanogenerator.
Journal of Physical Chemistry C, 2011. 115(18): p. 8961
The Journal of Physical Chemistry C, 2011. 115(46): p. 22742-22747
Chemistry of Materials, 2011. 23(5): p. 1188-1193