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The influence of different flame of gas welding on corrosion behavior of the carbon steel’s heat affected zone in seawater were studied by the weight-loss method, electroanalytical chemistry method and surface and microstructure observation.
In this paper, the weight-loss method, electroanalytical chemistry and surface and microstructure observation method are used to study the corrosion behavior of the heat affected zone of Q235 steel under the neutral flame and mild carbonizing flame, which are very meaningful to the selection of process and method of gas welding of the carbon steel.
The heat affected zone are cut into the size of 10×10×4[mm3] to electroanalytical chemistry measurement and surface and microstructure observation.
Results and discussion (a) Neutral flame (b)Mild carbonizing flame Fig.1 Diagram of Q235 steel welding head by two kinds of flame in seawater for 90 days Figure.1 is the photograph of the welded joint of Q235 steel during 90 days of immersion of seawater.The picture obviously shows the corrosion occurred om both of the sample, the rust layer are located in the welded joint and the heat affected zone, the corrosion are also occurred in the border of the sample, which are resulted from the cutting process of the sample make a smoother border to facilitate the microbial adhesion, the cutting process also result in a higher local temperature to affect the metallographic structure, then accelerate the corrosion as well.the figure No.1 shows that the rust layer of the heat affected zone sample under mild carbon flame are much thicker than that under neutral flame, this result from a increase of carbonizing content during the gas welding when using the mild carbon flame, and then

SnO2 nanomaterials with high surface/volume ratio and porous structure could deliver excellent gas sensing performance.
The structure and morphology of the prepared SnO2 nanomaterials were investigated by SEM and TEM.
The porous structure is constructed through removing the glucan by calcinations.
The high sensitivity of SnO2 could be contributed to the porous structure of this material.
Li: Materials Chemistry and Physics Vol. 113 (2010), p. 109 [5] X.H.

Effect of Hydration-Dehydration Activation on the Basic Strength of Nano Structured Alkaline Earth Metal Calcium Oxide Hidayah Mohd Aziz, Noor Idayu Masrom, Nur Fatin Sulaiman, Mohd Khairul Asyraf Amat Mustajab and Abdul Rahim Yacob Chemistry Department, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.
In this study, nano structured CaO was synthesized via hydration-dehydration method.
The prepared nano structured CaO sample’s basic strength will then be conducted by back titration method.
Basic Strength Nano Structured CaO In this study, the basic strength of the prepared nano structured CaO was recorded by back titration methods.
Journal of Physical Chemistry B.

The structure of the obtained materials was studied by means of DSC, XRD, electron and atomic force microscopy.
As shown by studies the surface of CAS Applied Chemistry Materials nanotubes contains up to 10% oxygen atoms.
Khvostik, Structure and properties of rubbers based on cyclic α-oxide, Voprosy materialovedeniya. 2(82) (2015) 117-122
Kuryavy, Morphology and structure of micron and nanosized powders of PTFE obtained by gas-phase method, Russian Journal of General Chemistry.
Slobodyuk, Structure of ultrafine polytetrafluoroethylene powders obtained from industrial wastes via hydrothermal method, Chemistry for Sustainable Development 18 (2010) 33-39

Kalychak1 1Department of Analytical Chemistry,Ivan Franko National University of Lviv, Kyryla and Mefodia Str. 6, 79005 Lviv, Ukraine 2Department of Condensed Matter Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic ae-mail: biguninna@gmail.com Keywords: indides; hydrogen absorption; crystal structure; magnetic properties Abstract.
RNi9In2 and their hydrides crystallize in the YNi9In2 structure type.
Crystal structure data and the details of structure refinement are listed in Tables 1 and 2.
Bünzli, Handbook on the Physics and Chemistry of Rare Earths, Elsevier, Amsterdam, Vol. 34, chapter 218 (2005) 1–133
Kalychak, Crystal structure of RNi4In compounds, Visn.

Antitumor Activities of Hydroxylated 9,10-anthraquinone Derivatives Xing-po WANG1，Wen-fang Xu,2 1School of Chemistry and Chemical Engineering, Shandong University, Jinan, P.
The structures of the compounds were identified by NMR, ESI-MS and elemental analysis.
According to the structure-activity relationships, a series of novel Emodin derivatives (4a-4e) were synthesized and reported.
The chemical structures of titled compounds were confirmed by 1H-NMR, 13C-NMR and MS(EI) spectrometries.
Krugel, et al., Bioorganic & Medicinal Chemistry , 22, 5961(2004)

This is because the molecular structure of the crosslinking monomer TOAEP contains 3 -OHs.
The milk white structures are the hard segment phase of WPU-0 while the dark part is the soft segment phase of WPU-0.
Lu: Industrial and Engineering Chemistry Research, Vol. 43 (13) (2004), p. 3336 [8] D.H.
Zhang, et al: Journal of Macromolecular Science, Part A: Pure and Applied Chemistry, Vol. 48 (4) (2011), p. 277 [11] H.
Hill: Pure and Applied Chemistry, Vol. 72 (7) (2000), p. 1255 [21] F.K.

Synthetic mechanism Molecular structure of aliphatic series superplasticizer.
Xu: Organic Chemistry (Higher Education Press, China 1993)
Du: Organic Chemistry (Science Press, China 2003) [7] X.Y.
Chen: Oilfield Chemistry Vol. 2 (1990), p.129 [11] Z.H.
Wang: Oilfield Chemistry Vol. 1 (1992), p.59 [12] Z.H.

Pure H4SiW12O40 give peaks due to the keggin structure at 989 cm-1 (W=O), 934 cm-1 (Si-O), and 784 cm-1 (W-O-W).
Three absorption peak of SiW12O404-  in the range of 700-1100 cm-1 almost does not have change, it shows that H4SiW12O40 support still retains the keggin structure.
It can illustrate the existence of strong chemical action between H4SiW12O40 and TiO2-SiO2, and it is not easy to fall off in the reaction, showing its structure has high stability.
KL2013G01) and Hubei Collaborative Innovation Center for Rare Metal Chemistry.
Handbook of Practice Organic Chemistry, Shanghai Science and Technology Press, Shanghai, 1981

Comprehensive utilization research progress of a high Mg phosphate tailings in China Zhidou TAN School of Chemistry and Environmental Engineering, Hubei University for Nationalities, Enshi, Hubei China,445000 tanzhidou@126.com Key words: High Mg phosphate tailings; Comprehensive utilization; Research progress Abstract: A high Mg phosphate tailings comprehensive utilization research is essentially leaching to remove the magnesium and phosphorus in it and eventually made containing magnesium and phosphorus or other nutrients compound fertilizer.
Phosphate tailings utilization in China were introduced, focused on a high Mg phosphate tailings chemistry, phase composition and reaction characteristics and kinetics of the dissolution results.
Experimental firing of the clinker contain more C3S, while the liquid phase under the conditions of the formation of C3S submicroscopic structure has been improved, thus the clinker with high strength.
Shaoxiang Jin et al [5, 6] according to the element speciation analysis methods, selection of chemical composition, chemical composition, electronic energy spectrum, scanning electron microscope, X ray powder diffraction analysis method system, comprehensive determination of the high Mg phosphate tailings structure, morphology of the important feature, calcium, magnesium, obtained phosphorus status of important conclusion, find the similarities and differences of tailings and its ore. phosphate tailings in the highest content of the components and their contents were: CaO 34.11%, MgO 17.65%, P2O5 5.30%; magnesium mainly dolomite occurred in the form of, and a small amount of the phosphates, silicates, its proportion in each phase 99.80 respectively, 0.10, 0.10; phosphorus mainly occurred in the form of apatite (97.08), and a small amount of iron oxide (1.04), (0.19), monazite xenotime (1.83) forms exist; calcium mainly dolomite occurred in the form of (96.95), and a small amount of calcite
Chinese Journal of Inorganic Analytical Chemistry. 2012,2(1): 37-42.