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., Ltd, Jiyuan 454000, Henan China azhujingjing16@163.com, bguhuazhi@163.com Keywords: Mechano-chemical; Silica; Phase analysis; Crystal structure Abstract.
Introduction In recently years, the using of mechano-chemistry in the polymer materials, metal materials and inorganic materials has attracted more and more attention from scholars.
Effect of grinding time on crystal structure of powders.
This is mostly due to the amorphous structure of microsilica.
(2) The crystal structure of slica and the composite powder changed in the grinding process.

Satellite oilfield is in high water cut production period, many reservoirs flooded, or great changes after long-term water injection pore structure, heterogeneity is more serious.
[4] Wang Bin, Guoping Zhang, Jianhua Xu, et al: Oilfield Chemistry, Vol. l9 (2002) No.3, p.230-232
[5] Yanwei Ning: Oilfield Chemistry, Vol.11 (1994) No4, p.357-361
[6] Luo Yue, Zhengliang Wang: Oilfield Chemistry, Vol.16 (1999) No.2, p.132-133.

Aleksandrov (Institute of Bioorganic Chemistry RAS).
Alexandrov (Institute of Bioorganic Chemistry RAS) and Anna V.
Chemistry and Industry of Forest Products 29 (2009) 165-168
Macromolecular Chemistry and Physics 209 (2008) 1240-1254
Hoff, Starch swelling pressure of cooked potatoes, Journal of Agricultural and Food Chemistry 20 (1972) 1283-1284

The effect of substrate temperatures on the morphologies and structures of CZTSe films were characterized using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD) and Raman scattering spectrum respectively.
The crystal structures of the samples were recorded by Rigaku D/MAX-2500VL/PC X-ray diffractometer with Cu K radiation.
Cu2ZnSnS4 films deposited by a soft-chemistry method.
A 3.2% efficient Kesterite device from electrodeposited stacked elemental layars Journal of Electroanalytical Chemistry 2010;646:52-59
Cu2ZnSnSe4 films by selenization of Sn–Zn–Cu sequential films.Journal of Physics and Chemistry of Solids 2009;70:567–570

RCu1+xSb2 (R = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y ) phases with defect CaBe2Ge2 - type structure X.
China 2 College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R.
Most of them crystallize in the body-centered tetragonal ThCr2Si2 structure while some adopt the primitive tetragonal CaBe2Ge2 structure [1].
The off [010] view of the RCu1+xSb2 structure series, which corresponds to LaCu1.39(5)Sb2.
The XRD data collection was carried out on the facilities at the State Key Laboratory for Physical Chemistry of Solid Surfaces at Xiamen University.

aprwsic0820@gmail.com, bmu_earthsci.03@hotmail.com, crattanawalee.c@gmail.com,dkritwonin@yahoo.com,esutharat.c@ku.ac.th,f*fscisrd@ku.ac.th Keywords: Zircon, Thermal enhancement, Heat treatment, Raman spectroscopy, FWHM, Material Physics and Chemistry Abstract.
The high temperature is one of the factors for the zircon structure to recrystallize.
Zircon is a metamict mineral whose structure is destroyed by some trace elements.
There are radioactive elements such as U and Th in the zircon structure.
Those radioactive elements lead to the destruction of the crystal structure [1, 3].

Studies on the geometric and electronic structures of SiC polytypes FuChun Zhanga, Xianhui Zhongb, XingXiang Ruanc, WeiHu Zhangd College of Physics and Electronic Information, Yan an University, Yan an 716000, China azhangfuchun72@163.com, btl2005h@vip.qq.com, cxingxiang6688@163.com, dydzwh@163.com Keywords: SiC, first-principles, electronic structure, geometric structure Abstract.
SiC poly-type geometric structure, electronic structure and energy have been subjected to systematic study based on first principle calculation method given in density functional theory.
At present, with improvement of calculation method and condition, theoretic research on SiC has focused on these several poly-types in terms of geometric structure and electronic structure, in order to make certain the internal relation between these poly-types, it is very important to make a study of their geometric structure and energy band feature.
The paper presents systematic and comparative study of these several poly-types in terms of geometric structure and electronic structure by density functional theory to further reveal relation between SiC poly-types in physical quantity such as lattice parameter and band gap in different pseudo potentials.
Fig. 1 shows several typical SiC crystal structures, including 3C-SiC andηH-SiC (η=2, 4, 6, 8, 16).

The results indicated that theses compounds exhibited antioxidant activities with a dose-dependent manner in all tested models, and had some structure–activity relationships.
“Antioxidant activities of barley seeds extracts,” Food Chemistry, vol. 102, Mar. 2007, pp. 732-737
“Purification and characterisation of a new antioxidant peptide from chickpea (Cicer arietium L.) protein hydrolysate,” Food Chemistry, vol. 128, 2011, pp. 28-33
“Identification of Antioxidative Flavonols and Anthocyanins in Sicana odorifera Fruit Peel,” Journal of Agricultural and Food Chemistry, vol. 59, Mar. 2011, pp. 975-983
Biological Chemistry, vol. 50, Apr. 2007, 254-258

Chemistry of hydration of Portland cement, Proc.
Chemistry.
Macosko: Rheology: Principles, Measurements and Applications, Wiley-VCH, New York, 1994 [7] Larson R.G.: The structure and rheology of complex fluids, oxford University Press, New York, 1999 [8] Weitz D., Wyss H., Larsen R: Oscillatory Rheology, Measuring the Viscoelastic Behaviour of Soft Materials.
Chemistry of cement, Thomas Telford Publishing; 2 edition (January 1, 1997), pp. 228 [12] B.E.I.
Egan, The solution chemistry and early hydration of ordinary Portland cement pastes with and without admixtures, Thermochimica Acta, 340 (1999), pp. 417–430.

Otzhan et al., Hydrogenation of aromatic nitro-compounds of a different structure in a liquid phase, Journal of Chemical Technology & Metallurgy. 54(3) (2019) 522-530
Qun et al., Efficient and mild reductive amination of carbonyl compounds catalysed by dual-function palladium nanoparticles, ACS Sustainable Chemistry & Engineering. 7(23) (2019) 19225-19234
Cho et al., Pd/C–Al–water facilitated selective reduction of a broad variety of functional groups, Green Chemistry. 19 (2017) 1230-1234
Kustov, Selective liquid phase hydrogenation of aromatic nitro compounds in the presence of FE–CU nanoparticles, Russian Journal of Physical Chemistry A. 94(6) (2020) 1180-1183
Madhu, Hydrogenation of nitroaromatics to anilines catalyzed by air-stable arene ruthenium (II)–NNN pincer complexes, Applied Organometallic Chemistry. 33(6) (2019) e4689