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By now, mechanics has occupied an important position in natural science system and ranked one of the new 7 basic disciplines together with mathematics, physics, chemistry, astronomy, geography and biology.
Bone biomechanical properties can reflect bone’s strength and hardness through mechanical structure and so become the important indicators of bone quality evaluation.
The former refers to the mechanical properties of the whole bone structure and is related to bone’s material properties and geometrical shape.
It is the key to improve spinal cord injury efficacy to prepare spinal cord de-cytoskeleton to attain three-dimensioned spinal cord base material and structure cell engineering spinal cord.
Maxillofacial region is complex in structure, so an important aspect of the devices to improve clinical treatment and enhance medical protection is to strengthen the studies of the injury mechanism in maxillofacial region injury.

Most of the marine structures are made of mild steel due to its great mechanical properties and machinability at a lower price.
It gives an excellent effect in minimizing the corrosion rate especially for marine structures.
Application in Corrosion Protection In marine environment, materials part or structures such the ships hulls, cooling-heat exchanger and structure in power plants are directly contact with corrosive ions (Cl-).
Conclusion The corrosion problem in marine structure gives major impact to economy of a country.
Younan: submitted to Arabian Journal of Chemistry (2014) [4] L.

Since Novoselov peeled a few graphene sheets from high crystalline graphite using a scotch tape method in 2004 [2], there are outstanding interest from scientific communities about the chemistry, physics, and potential application of graphene based materials [3].
The yield and size of the sheets of the graphene materials can also be controlled by varying the crystal structure of the parent graphite and/or the graphite oxide exfoliation conditions [12].
From the image, it can be observed that GO has layered structures which afford ultrathin graphene films.
Oxidation present in GO breaks the π -conjugated structure in the original graphite structure to form the graphite oxide, which resulting in a decrease both carrier concentration and carrier mobility [18,19].
Structure of Graphite Oxide Revisited.

Fly ash concrete electron microscope structure(SEM) The structure of milled fly-ash concrete without and with activation admixture is shown in Fig.2 and Fig.3 .
In Fig.2-3, for plenty of C-S-H gelatum has been formed in lateral age, concrete structure hardened closely.Because of the formation of a honeycomb C-S-H gelatum and plenty of second fly ash reaction, concrete structure hardened closely.
By analyzing the structure of milled fly-ash concrete with and without activation admixture, activation admixture plays a certain role in promoting the second fly ash reaction and the formation of adequate C- S-H gelatum hydration products. 2-1 2-2 2-3 Fig.2 The structure of milled fly-ash concrete without activation admixture 3-1 3-2 Fig. 3 The structure of milled hardened fly-ash concrete with activation admixture Mechanical activation enhancement mechanism analysis Although the superficial area of milled fly ash particles and the water surface adsorption increases, the spherical "ball" particales increases too, which improves the system liquidity and workability, thus reduces water content.
The most effective method to improve the strength is by combining physical with chemistry activation.

Fig.1 depicts the molecular structure of lawsone dye and its polymeric structure.
The right part of the Fig.1 is polymeric structure with hydrogen bonding interactions B.B.B layers and A.C layers.
X-ray diffraction revealed hexagonal structure of ZnO.
Puranik, MOF with hydroxynaphthoquinone as organic linker: Molecular structure of [Zn (Chlorolawsone)2(H2O)2] and thermogravimetric studies, J.
Khan, Ab initio and semiempirical study of structure and electronic spectra of hydroxyl substituted naphthoquinones, Spectrachim.

Synthesis and Characterization of Gomuti-graft-polyacrylamide Flocculants Yuesheng Xie1,a , Wei Wang 2,b, Wei Li3,c 1,2,3Department of Chemistry, Guangxi Teachers Education University, Nanning , Guangxi 530001.
The graft copolymer formed as a result of gomuti-starch-and-acrylamide reaction is expected to be a type of polymer flocculants with unique structure and properties.
Thus, product also has elementary structure of both gomuti starch and polyacrylamide at the same time.
Surfacemorphology of GOM before grafting shows a net structure, which has been changed to flat form after grafting.
This molecular structure is conducive to trap suspended particulates, especially for capturing ultrafine particle [7].

The component of reaction products was identified by GC/MS analysis, while the structures of DPU and DPTU were confirmed by various analyses. 2 EXPERIMENTAL Ethanol and ether were dewatered by MgSO4 and then distilled in vacuum or under nitrogen atmosphere.
The molecular structure of DPU was identified through melting point (238-239 oC, literature value 239-240 oC[15]), analysis calculated for C13H12N2O: C, 73.56; H, 5.70; N, 13.20; O, 7.54, found: C, 73.59; H, 5.72; N, 13.18, O, 7.51, FTIR (KBr film, n=3326.9, 1648.6, 1596.9, 1555.4, 1494.4, 1443.2, 1312.6, 1233.8, 893.9, 754.7, 698.8 cm-1), UV (lmax=205, 257 nm) and 1H NMR(dH: 7.504-7.523(4H, d), 7.233-7.261 (4H, t), 6.937-6.966 (2H, t)).
The component of reaction product of aniline with CS2 catalyzed by AlCl3 should be similar to the reaction product of aniline with CO2 since the structure of CS2 is similar to CO2.
Pure DPU and DPTU were obtained by recrystallizing reaction product from ethanol, and the molecular structures of DPU and DPTU were identified through melting point, GC/MS, FTIR, UV and 1H NMR data.
[14] Yuan X H, Ni Z H, Wei X Y, et al, Chemistry (Huaxue Tongbao). 65(2002)627

The bubbles structure significantly affects the foam rheology.
In this phase, foam appears to have difficulty in flowing out through the orifice due to the interconnecting bubbles within the foam structure blocking the orifice.
A foam with a higher FWC contains by default a higher gas content thus resulting in larger sized bubbles which in turn promotes stronger interaction within the foam structure and retards flow.
Advances in Chemistry series 242, American Chemical Society, Washington DC, 1994
Sunarjono, Foamed Bitumen Structure, The 16th Internasional symposium of the Indonesian inter university transport studies forum, Universitas Muhammadiyah Surakarta, Surakarta, 2013

Synthesis of PLA-PEG Block Polymer Catalyzed by Solid Super Acid Wenming Liu, Ming Gong, Hui Yang, Lu Xia Institute of Applied Chemistry, Nanchang University, Nanchang 330031, China wmliu@ncu.edu.cn Keywords: Solid super acid; PLA-PEG block polymer; Poly (lactic acid); Hammett Indicator; Abstract: The PLA-PEG block polymer was prepared by opening ring polymerization catalyzed by solid super acid SO42-/ZrO2-CeO2.
Properties and structure characterization.
Wavelength of 1625cm-1 place was the adsorption bending vibration of water surface, at 1384,1283 cm-1 absorption peak was the chelating bidentate adsorption of SO42- , 1283 cm-1 and 1384 cm-1 absorption peaks were respectively attributed to inorganic chelating bidentate-like coordination structure and the structure of organic sulfate; 1140, 1045 cm–1 were the double coordination adsorption of bridge type [7].
This was due to high temperature was good for the stable coordination structure of SO42- and Zr4+, that can enhance the electron effect of SO42- to Zr4+, and made the acid strength increase.
When calcination temperature was about 650°C, catalyst surface formed more double coordination structure, and SO42- relatively lost few, so acidic strength was the strongest.

Then, structure of PSiNs samples were visualized using Field Emission Scanning Electron Microscope (FESEM).
Result and discussion Structure of Porous Silicon Nanostructures (PSiNs).
In the present case, we have varied the HF concentration to change the PSiNs structures.
PL is directly related to the electronic structure and transitions.
Lehmann: Physics and Chemistry of Liquids Vol. 28 (1996), p. 245-252