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At low temperatures it has a close-packed hexagonal crystal structure, which is known as α phase.
Whereas above 882 °C it has a body-centered cubic structure known as β phase.
Dolinar, Surface chemistry and microstructure of metallic biomaterials for hip and knee endoprostheses, Applied Surface Science 427 (2018) 584-593

Analysis of Curing Kinetic Models for Polyester Resin C­L ISO 112 G Endija Namsone1,a*, Alexandr Arshanitsa2,b, and Andrejs Morozovs3,c 1Institute of Materials and Structures, Riga Technical University, Kalku 1, Riga, Latvia, LV-1658 2Latvian State Institute of Wood Chemistry, Dzerbenes 27, Riga, Latvia, LV-1006 3COMPOR, Instituta 1 k-3, Salaspils, Latvia, LV-2169 aendija.namsone@rtu.lv, barshanica@edi.lv, candrejs.morozovs@compor.lv Keywords: curing kinetic model, differential scanning calorimetry, polyester resin.
Introduction Nowadays fiber reinforced composites are used widely in different lightweight structures [1–3] requiring high stiffness-to-weight and strength-to-weight properties and working under high operational loads [4, 5].

Introduction Polyaniline (PANI) has been widely investigated because of its mechanical flexibility, high environmental stability, ease of processing, simple and reversible doping/dedoping chemistry, and modifiable electrical conductivity [1].
b a Fig. 2 (a) Field-emission scanning electron microscopic image of polyaniline doped with itaconic acid magnified by30K times and (b) X-ray diffraction pattern of polyaniline doped with itaconic acid Chemical Structure.
The chemical structure of PANI doped by itaconic acid could be inferred from the FT-IR result.

The Research of Konjac Glucomannan Fracturing System Ying Su1,a, Yiding Shen2,b, Lei Wang3,c,Xiaorong Wang4,d, Xiaojuan Lai5,e,Fengsan Zhang6,f,Guanjun Liu7,g,Zhongqiang Wei8,h Key laboratory of Auxiliary Chemistry & technology for Chemical Industry,Ministry of Education, Shaanxi university of Science & technology, Xi'an, Shaanxi Provence, People’s Republic of China alee.echo@163.com, bydshen@sust.edu.cn, c3578466@163.com, dxiaorongsagittarius@126.com, elaixiaojuan@sust.edu.cn,fzhangfengsan911@126.com,glgjunde@163.com,hweimanlian@163.com Keywords: Konjac glucomannan; Temperature resistance; Shear resistance; Residue content; Abstract: Fracturing fluid was obtained by putting the organic borate and organic titanium crosslinkers into the base fluid of konjac glucomannan.
The equation was shown in Scheme 1 and the structure was shown in Figure 3.
Scheme 1 The crosslinking reaction between B(OH)4- and the hydroxy group of PWT Figure 3 The formation structure of konjac gum With the addition of organic borate crosslinker, the fracturing fluid performed higher viscosity.

It is a good adsorbent due to the network pore structure, weak polarity, hydrophobic and lipophilic nature.
Fig. 1 Chemical structure of methylene blue (MB).
Solution pH influences both the graphite surface dye binding sites and the dye chemistry in the water.

It should also be noted that after microwave treatment the oil does not show thixotropy (figure 3), which indicates a change in the oil structure.
Khasanov, Geometric and electronic structure of heavy highly viscous oil components, Russian Journal of Chemistry and Chemical Technology. 62(N 9) (2019) 33-39

Previous literatures [9,10] reported that, in order to keep the free energy lower, the nitrogen atoms have a tendency to occupy the interstitial site in the tetragonal Nd2Fe14B-type structure, leading to the formation of Nd2Fe14BNx.
From the consideration of chemical affinity, the nitrogen atoms and neodymium atoms tend to form steady phase structure.
Dean: Lange’s Handbook of Chemistry, 15th ed.

Beese: Structure Vol. 8 (2000), p. 209-222 [4] P.
Gburski: Journal of Molecular Structure Vol. 750 (2005), p. 18-21 [5] D.M.
Mark and W.F. van Gunsteren: Journal of Computational Chemistry Vol. 19 (1998), p. 535-547 [10] Thomas la Cour Jansen.

This paper studies the TiO2 coating layer formed on the surface of the silicon in order to complement the integrity of the electrode structure of the silicon active material which is prepared by the modified sol-gel method [4].
However, a porous layer coating has not yet been identified and the TO2 layer on the silicon which has the optimum physical structure may also lead to better electrochemical performances.
Cheng: Materials Chemistry and Physics Vol. 96 (2006), pp. 311-316. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 specific capacity(mAh/g) (a) 1 st 2 nd 5 th 10 th 20 th 1 st 2 nd 5 th 10 th 20 th 1 st 2 nd 5 th 10 th 20 th 1 st 2 nd 5 th 10 th 20 th (b) Reversible capacity Irreversible capacity (c) (d)

Preparation of Nano-sized TiO2 Supported on Granular Activated Carbon and the Photocatalytic Degradation of Methylene Blue Peng Zhang, Shuting Lai, Fang Liu, Zhuohong Yang, Wuyi Zhou* Department of Applied Chemistry.
The crystalline structure of the nano-sized TiO2 was determined by X-ray diffraction (XRD) with a RigakuD/max 2550 VB 118kW instrument using Cu Kα radiation.
XRD patterns in Fig.1 shows clearly that all the diffraction peaks belong to anatase crystal structure (JCPDS card no. 89-4921).