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Magnetic properties of low grade manganese carbonate ore Yan Wu1,a, Bin Shi1,b, Huan Liang1,c, Wen Ge1,d, Chun-Jie Yan1,e and Xiang Yang1,f 1Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), P.R.
Analysis methods X-ray Diffractionmeter, X’ Pert PRO MPD characterized phase structure.
Pyrolusite (MnO2) is antiferromagnetic below TN (92 K) with a spin structure of the proper screw type derived from neutron diffraction studies [12].

So, if we turn to different options of artificial structuring of granular (model poly-ball) media, they already point at a narrow spread of possible ω and γ values, viz. they range from ω0,48 and γ0,52 for a classical cubic packing up to ω0,26 and γ=0,74 for a more complex packing [1,2].
As to the loadings of spherical granules or grains, i.e. for a mixture of various natural structures (obviously, ‘deformed’ ones), the ω and γ spreads become even narrower; there remains a very weak dependence of γ on the relative size of the medium loading, e.g. on the loaded container diameter ratio to the granule diameter [1, 2].
[2] Sandulyak A.V.: Magnetic and filtration purification of liquids and gases / Moscow: Chemistry (1988). 133 p

This increasing is due to breakdown fatty acid chin in structure Jatropha oil and hydrocarbons in structure of hydraulic oil[15, 16].
Erhan, Friction behavior of some seed oils: biobased lubricant applications, Industrial & engineering chemistry research, 2006. 45(10): p. 3735-3740

Boccaccini 1,f * 1 Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, UK 2 Department of Chemistry, Imperial College London, Imperial College Road, London SW7 AZ, UK 3 Department of Materials Science and Engineering, University of Alabama at Birmingham, 1530 Third Avenue South, Birmingham, AL 35294, USA a Boris.thomas@imperial.ac.uk, bM.shaffer@imperial.ac.uk, cSarah.j.freeman@imperial.ac.uk, dMkoopman@uab.edu, e Kchawla@uab.edu, fa.boccaccini@imperial.ac.uk Keywords: Carbon nanotubes, Electrophoretic deposition, Coatings Abstract A method based on electrophoretic deposition has been developed to produce uniform deposits of multi-walled carbon nanotubes on stainless steel substrates.
In particular, EPD has been shown to be a versatile, effective and low-cost technique to produce oxide coatings of controlled thickness and homogeneous microstructure on a wide range of substrates, including metallic and ceramic planar substrates, wires, individual fibres, filaments, fibrous structures and porous components [16-18].
The structure of the CNT deposits after nanoindentation was observed by FEG-SEM, as shown in Figure 3a & 3b.

The objectives of this study were to (i) investigate the effects of the properties (i.e. the molecular weight, molecular structure and polarity of the solvent) of the solvents on the bitumen recovery; (ii) optimize the solvent extraction conditions for future application in industries.
The reason for these may be that the bituminous constituents contain aromatic or cyclic structures.
Speight, Recovery of Heavy Oil and Tar Sand Bitumen, The Chemistry and Technology of Petroleum.CRC Press

dChinese Medicinal Chemistry, Beijing University of Chinese Medicine, Beijing100102, China.
Results and discussion Structure of the Fe3O4 and PMMA Fig. 1 (A) XRD pattern of the Fe3O4 powders.
Conclusion We prepared three types of PMMA-based composite bone cements and their structure and properties were investigated.

Due to the unique characteristics of meso-porous materials, such as ordered pore structure [2], uniform adjustable pore size [3], excellent absorption properties [4], and exceptional thermal stability [5], it has been widely applied in scopes of separation and purification [6], advanced assembly materials [7], gas storage [8], catalytic materials [9], organic - inorganic hybrid material [10] and so on.
Between 3°~5°appear two weak diffraction peaks, corresponding to (110) and (200) diffraction peak of MCM-41, indicating a typical two-dimensional hexagonal structure of the synthesized meso-porous MCM-41.
Turov, A.V Turov: Central European Journal of Chemistry, Vol.5 (2007), P.420-454

Synthesis of a novel donor unit for organic light-emitting materials: 10-octyl-3,7-di(thiophen-2-yl)-10H-phenothiazine TANG Zebiao1,a, SUN Xiaoxia1,b* MIAO Leping1,c, SHEN Huayin1,d 1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, People’s Republic of China atangzebiao88@163.com; bsunxiaoxia77@126.com; cmiaoleping@163.com; dshenhuayin49565880@163.com Keywords: donor unit; organic molecule; light-emitting material Abstract.
Introduction The D-A type molecules have attracted much academic and technological research attention during the past decade because of their great potential applications as photoactive materials in molecular electronics, such as biochemical fluorescent technology,1 electrogenerated chemiluminescence,2 organic light emitting diodes (OLEDs),3 and photovoltaic cells.4 Compared to other materials, the donor-acceptor materials have an advantage on their physical properties easily being tuned over a wide range by appropriate chemical modification to the structures of donors or acceptors.5 Recently, Donor-acceptor (D-A) molecules are of great interest as light-emitting and electroluminescent multifunctional materials for organic light-emitting diodes (OLEDs).6 To make a improvement of the property of OLEDs, the feature of emissive materials we desired should be highly capable of accepting both electrons and holes while exhibiting high luminescence quantum yield.7 That’s to say, we should explore
The fluorescence spectra of the compound M1 have well-resolved vibronic structures in dilute THF solutions and in the solid states, as shown in Fig. 1b.

Preparation and characterization of Several latent curing agents for epoxy acrylate resins CHEN Jing-jing 1,a, WANG Hui2,b and ZHU Chuan-fang 2,c 1 Department of Chemical and Environmental Engineering, Wuhan Polytechnic University, 430023, People’s Republic of China 2 Department of Chemistry, Central China Normal University, 430079, People’s Republic of China achenjj0412@126.com, b461377899@qq.com, ccfzhu@mail.ccnu.edu.cn Keywords: latent curing agent, epoxy acrylic resin, corrosion, thermostability Abstract.
The curing agents remained inactive at room temperature within epoxy acrylic resin while can react with epoxy acrylate resins at 120℃ and form a compact structure in the resins.
The curing mechanism of a~c may base on the decomposition of imines with the existence of moisture and then the released amino group reacted with epoxy group to form a crosslinked structure in the epoxy acrylic resins.

It is observed in the micrographs of the materials Geo_24_MS and Geo_48_MS a more compacted structure with very few empty spaces, between the materials we can see some cracks, which explains the fact that these materials have different flexural strength values.
When using strong acid solutions, the attack on the geopolymer structure is straightforward, occurring dealumination.
Taylor: Cement Chemistry.