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It is suggested that calcium chloride has a chaotropic property that disrupts stabilizing intra-molecular forces such as hydrogen bonds in silk fibroin structures by shielding charges and preventing the stabilization of salt bridges.
Kaplan, “Silk,” in Handbook of Fiber Chemistry, pp. 383–404, CRC Press Taylor & Francis Group (2007)
Kirichenko, “Structure and solubility of natural silk fibroin” RussianJournal of Applied Chemistry, vol. 79,no. 6, pp. 869–876 (2006) [8] U.

However, due to its low glass transition temperature, poor self-supporting ability and high elasticity, PU membrane has compact structure and it is difficult to form pores in it.
Hu et al: Structure and property of melt-spinning polyurethane based hollow fiber membrane, Journal of Functional Polymers, 19-20(4): 380-385 (2007)
Newkik: Thermogravimetric measurements, Analytical Chemistry, 32: 1558-1563 (1960)
The thermogravimetric evaluation of the kinetics of the decomposition of calcium oxalate monohydrater, Journal of Physical Chemistry, 62: 394-397 (1958)

Preparation and Characterization of Bimetal and Nitrogen Co-modified Titanium with Visible-light Activity Xinxin Guan1, a, Wenwen Shen1, b, Fuxiang Zhang2, c, Naijia Guan2, d 1Chemistry Department, Zhengzhou University, Zhengzhou, Henan, 450001, China 2 Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry, Nankai University, Tianjin 300071, China aguanxin@zzu.edu.cn, bshenwenwen300@163.com, czhangfx@nankai.edu.cn, dguannj@nankai.edu.cn Keywords: Titanium Oxide, Modified, Visible-light Activity, Abstract.
Characterization of photocatalysts The crystal structure of samples was characterized by powder X-ray diffraction (XRD) on a X-ray diffractometer (Rigaku D/max-2500) employing Cu Ka radiation and operating at 30kV/30mA in the angel range of 5-80°.
Thus, N and Fe co-doping does not cause the change in the crystallite structure of TiO2.

Influence of Electroless Copper Deposition on the Electrochemical Performance of Si/MCMB Mei Yan1, a*, Weiqiang Gao1, b, Ruisheng Xue2, c* and Jinghua Yu1, d 1Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China 2Key laboratory of carbon fiber and functional polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China a chm_yanm@ujn.edu.cn, b gwq001007@163.com, cxuersh@mail.buct.edu.cn dyanmeilw@163.com Keywords: MCMB, silicon, lithium-ion battery, electroless deposition, anodic performance Abstract.
However, the alloying process is accompanied with a huge volume expansion (about 400%) and significant structure stress, which cause cracking and pulverization of the Si anode.
The lithium extraction capacity and coulombic efficiency of the sample heat treated at 800 ºC (Si-Cu/MCMB-3) slightly decrease (Table 2), which is mostly because of the structure transformation of masophase pitch during carbonization process.

In this paper, a self-made flexible film with three-layer structure was used for packaging mango [16].
Flexible films with three-layer structure were prepared by dry lamination.
Food Chemistry Vol.44(1) (1992), p.45
Food Chemistry vol.105 (2007), p.1327 [11] Edna Pesis, Dalia Aharoni, Zion Aharon, Rosa Ben-Arie, Nehemia Aharoni, Yoram Fuchs.

A Novel Method for Quantitative Analysis of Tetragonal Phase in Barium Titanate Powders by X-ray Diffraction Yongping Pu1, a, Ning Xu2,b and Xiaolong Chen2 1 School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021 China 2 Key laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Xi’an, 710021 China apuyongping@sust.edu.cn b xu-ning-skd@163.com Keywords: quantitative analysis; tetragonal phase; barium titanate powders; X-ray diffraction Abstract.
BaTiO3 crystal has cubic symmetry structure above 120 ºC while tetragonal structure when temperature decreases to120 ºC and at the same time the axes a decreases and axes c grows, that is to say the axes ratio c/a is increases.
[8] P.K.Dutta, J.R.Gregg: Chemistry Materials, 1992, 4:843-846

Introduction Coal solvent extraction under mild condition followed by characterization of composition and structure of the extracts is an effective method to researches of coal composition and structure on the molecular level, which is fundamental to clean and reasonable utilization of coal, and the application of modern analyzing techniques including GC/MS, LC/MS, FTIR, etc. play an important role for this purpose [1-3].
SFC was provided by Beijing Research Institute of Coal Chemistry, China Coal Research Institute, and table 1 shows its proximate and ultimate analyses.
Relationship between molecular coal chemistry and directional conversion of coal derivatives .

The intractability of landfill leachate is primarily because of its components complexity and structure variability.
Quasi-hydrophilic substances has a high oxygenic functional groups which may be carboxylic acid functional groups, and its structure may also include some hydroxyl groups and aliphatic chain, less nitrogen, double and triple bonds [3-5].
[18] Luan Y, Fu P F, Dai X G: progress in chemistry. 2004, 16 (5): 738-746.
L., et al: Journal of Photochemistry and Photobiology A: Chemistry, 2010, 213(2-3):129-135 [26] J.

The complex response, such as electrochemistry, colloid chemistry, fluid mechanics, plasma, thermodynamics, physical chemistry, turns out randomly in discharge spark process.
In the infancy of the red spark state, the coating grows slowly and the crystalline structure does not appear because the discharge breakdown happens in the gas layer on the coating surface and only little energy can be used for the coating growth.
Therefore, the coating growth accelerates and the crystalline structure appears.

To study the structure of the samples, a Light optical microscope Leica DMI 5000 was used, ad the structure and local chemical composition in various fields was studied on SEM Tescan Mira 3 with an X-MAX attachment for EDS.
At first, the study of the structure was started with thin-walled ring samples.
Panorama of the structure of the thin-walled sample along the entire height with 8 areas.
The standard deviation in chemistry for 7 points is 0.25%.
The standard deviation in chemistry for 7 points is 0.25% for this sample.