Search results

China Insitute of Chemistry and Applications of Plant Resourced, Dalian Polytechnic University, Dalian, Liaoning, 116034, P.
The polymerization reaction was carried out at room temperature under stirring for 18 h to obtain particles with a high cross-linking structure.
The molecular selectivity of the imprinted nanospheres was investigated using the structure-analogous BPC, TBBPA, and NP as adsorptive competitors with BPA.
Their structures are shown in Fig. 1.
The molecular selectivity of imprinted silica nanospheres was measured using the structure-analogous BPC, TBBPA, and NP as competitive species with BPA in a mixed solution.

When Mg 2+ was added into HA structure, the samples synthesized at 15.0 mL.min -1, became thermally stable.
The ultrasonic frequency favored the increase of the Mg 2+ acceptance limit in the HA structure when compared with literature dates.
HA monophase, with 15.0 mL.min -1 H3PO4 addition, was obtained with magnesium addition into structure.
The ultrasonic frequency favored the increase of the limit of the Mg 2+ acceptance in the HA structure when compared with the literature dates.
Janas, K.S.TenHuisen: Journal of Solid State Chemistry Vol. 177 (2004), p. 793-799

Crystallization Behavior of Heat-Treated Basalt Fiber Ning Wang1,a, Shuen Hou1,b,*, Hongyun Jin1,c,* Faculty of Material Science and Chemistry, China University of Geosciences, No. 388 Lumo Road, Wuhan 430070, China a cugwangning@163.com, b shenhou@cug.edu.cn, c jinhongyun1980@126.com Keywords: Basalt Fiber, Heat-Treated, Crystallization Behavior, Microstructure Abstract.
The glass transition temperature (Tg) of this fiber is observed at 673 ℃, indicating its structure began to adjust.
Particularly in fingerprint regions (1250~400 cm-1), difference of the spectra is very obvious due to the small change in molecular structure.
Origin sample is a kind of glassy fiber with irregular molecular structure.
Moon, Characteristics of basalt fiber as a strengthening material for concrete structures, Compos.

The functional domain of R.oryzae Chitin deacetylase was predicted and views structure with Cn3D (www.ncbi.nlm.nih.gov/Str-ucture/cdd/wrpsb.cgi; http://swissmodel.expasy.org/)[3,4,5].
Predicted 3D-structure of Chitin deacetylase of R.oryzae see figure.6.
In the biological control of fungal human pathogen, the fungal cell wall is an excellent target for anti-fungal therapies as it provides cell structure and integrity.
,Svensson, B., Eds.; The Royal Society of Chemistry: Cambridge, UK, 1999; pp. 3-12
The SWISS-MODEL Workspace: A web-based environment for protein structure homology modelling.

Física Aplicada, ETSI Industriales y Minas, Lagoas-Marcosende 9, 36200 Vigo, Spain, jpb@uvigo.es 2 Process Chemistry Group, Combustion and Materials Research, Åbo Akademi, Piispankatu 8, 20500, Turku, Finland, heimo.ylanen@abo.fi Keywords: bioactive glasses, network modifiers, FTIR, Raman, bioactivity.
This structure enables the accommodation of alkali and alkali-earth cations which create non-bridging oxygen sites (Si-O-NBO) throughout the glass network [3].
The structure of the glasses was studied by X-ray Diffraction (XRD).
These effects are originated by the incorporation of the alkali and alkali-earth ions into the vitreous structure, which provokes a disruption of the network and promotes the formation of non-bridging oxygen groups [5].
Scholze: Glass: Nature, Structure and Properties (Springer-Verlag, New York, 1990) [4] P.

Hydrothermal synthesis, as an important method of wet chemistry, has attracted lots of attention from materials scientists and chemists.
Results and discussion The crystal structures were modified by XRD.
All diffraction peaks can be ascribed to the pure hexagonal phase of ZnO (wurtzite structure, space group P63mc).
However, little shuttle-like 1D structures were obtained with a high concentration of N2H4·H2O (3mL).
The UV–vis reflectance spectra of the ZnO structures prepared at different amounts of N2H4·H2O: 0.5, 1, and 3mL are shown in Fig. 3.

Introduction Organic solar cells have attracted great attention in recent years because of the importance of utilizing solar energy and their advantages of easy fabrication, low cost, and light weight in comparison with their inorganic counterpart.[1] Currently, the power-conversion efficiencies (PCE) of both polymer solar cells (PSCs) with spin-coating bulk-heterojunction structure has already attained 8% through annealing with solvent or heat and special devices structure, which is the threshold value for possible commercial applications.
Fig.1 Chemical structures of phenanthrene-9,10-dione (PQ, 1), poly[2,7-(9,9-dihexylfluorene)] (PDHF, 2) and poly(phenan-threnequinone-3,7-co-alt-9,9-dihexyl-2,7-fluorene) (PPQF, 3) For improving the PCE values, many mechanisms were given and studied.
Hu et al had also reported that the phosphorescent Ir(ppy)3 showed a more efficient photovoltaic response as compared to fluorescent Alq3 with the same device structure.[3] Therefore, the triplet excitons may have an effect on the PV process in organic solar cells. 9,10-Phenanthrenequinone (PQ) is an important o-quinone compound and a crucial reduction-active 1,2-diketone that had been widely studied in the fields of holography, electrochemical sensors, chemically modified electrodes, pharmaceutical chemistry and biochemistry.
The photocurrent of PPQF and PDHF with or without PCBM in polymer solar cells The photocurrent spectra of PPQF and PDHF with the structure ITO/PEDOT/Polymer:PCBM or polymer/LiF/Al were shown in Fig. 3.

Chemistry and Materials Department, Naval University of Engineering, Wuhan 430033, China aemail: wenqingzhen8@sina.com, bemail: chengqing1987512@sina.com, cemail:zhujinhua@163.com, Keywords: Polyurethane elastomer, Modified nano silicon carbide, Carbon nanofibers, Modified Abstract.
Polyurethane composite materials were quenched respectively in liquid nitrogen, then observing the structure and morphology of the fracture surface under Japan's Hitachi model S-4800 scanning electron microscope.
Fabrication and distribution characteristics of polyurethane/single-walled carbon nanotube composite with anisotropic structure.
Composite Structures,67(1):115-124(2005)
[7] Velazquez-Castillo R，Reyes-Gasga J，Garcia-Gutierrez D L，et al．Nanoseale characterization of nautilus shell structure:An example of natural self-assembly．J Mater Res, 21（6）: 102-105(2006)

In comparison with neat MWCNTs, PANI/MWCNT nanocomposites exhibited uniform core–shell structure with larger tube diameter, which indicated the uniform formation of PANI layers on the surface of carbon nanotubes.
Chemical Structure.
Two doped nanocomposites exhibited good core–shell structure, and secondary doping could obviously affect the arrangement and conformation of PANI chains.
[3] Zhou Y, Qin ZY, Li L, Zhang Y, Wei YL, Wang LF, Zhu MF, Polyaniline/multi–walled carbon nanotube composites with core–shell structures as supercapacitor electrode materials, Electrochimica Acta, 2010, 55: 3904–3908
[4] Li L, Qin ZY, Liang X, Fan QQ, Lu YQ, Wu WH, Zhu MF, Facile Fabrication of Uniform Core–Shell Structured Carbon Nanotube–Polyaniline Nanocomposites, The Journal of Physical Chemistry C, 2009, 113(14): 5502–5507

The effect of Pb(II) substitution by Sr(II) in A site of the perovskite structure at molar percentages of 0.0, 0.2, 0.4 and 0.6 mol% was investigated through XRD and Rietveld method.
An intrinsic event can be occurring because considerable lattice distortion was verified in tetragonal and rhombohedral structures for powder samples.
Strontium seems to strain both structures and the smaller ionic radium for Sr(II) when compared to the Pb(II) one comprises the central ABO3 octahedron of perovskite phase.
The lower Kc value for PZT02Sr ceramic sample seems to be consequence of high disordered structures, as seen for its R-F values for tetragonal and rhombohedral phase in Table 2.
It was investigated the influence of strontium modifier on the phase amount, structure, microstructure and dielectric properties.