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Chemical structure of CTS-AGS was characterized by FT-IR, and the morphology of CTS-AGS was observed by SEM.
Because there are a large of hydroxyl and amino groups on the chain of Chitosan, and a large of hydroxyl and carboxyl groups on the chain of sodium alginate, the polymer of chitosan and sodium alginate has the properties of more wide distribution of molecular weight, more active groups, and diversify of structures.
SEM analysis The scanning electron microscope (SEM) is used to analyze the structure of copolymer Fig.2 SEM of CTS Fig.3 SEM of CTS- AGS The results showed the synthesis of CTS-AGS was carried out as the established way, CTS and SAL are reacted with each other.The addition of AGS greatly destroys the structure of CTS.
References [1] Wang Linzhu and Wang Wenwei:Science & Technology of Baotou Steel(Group) Corporation.Vol.30 (2004). p.16 [2] Huang Jinming:Chemical Journal of Chinese Universities.Vol.13 (1991),p.34 [3] Lee SH,Shin WS,Shin MC et al:Environ Tech.Vol.22(2001),p. 653 [4] Cheng Yun and Zhou Qixing:Techniques and Equipment for Environmental Pollution Control.Vol.4(2003), p.56 [5] Yuan Yihua and Lai Xinghua:Journal of Foshan University.Vol.4(1993), p.161 [6] Rong Guobin:Organic Chemistry(East China University of Science and Technology, Shanghai 2000)
[7] Chen Linyun :Chinese Journal of Applied Chemistry.Vol.18(2001),p.51 [8] Y.H.

It has received considerable attention and gained application in the fields of catalysis, coordination compound chemistry, and materials science.
However, their ladder structures were not hard to be accepted by polymer scientists [3].
The higher stereo-regular structure of ladder PMSQ was successfully acquired as shown in Fig.2.
Besides, FT-IR test also provides more evidences to support the regular structure of PMSQ.
These phenomena coincide with the regular ladder structure.

A mixture of phases, hexagonal bi-pyramidal structures as well as 1D elongated structures (with diameter 50-200 nm) can be seen in Fig. 2.
Kato, Journal of Solid State Chemistry 38 (1981) 297–299
Roth, Journal of Solid State Chemistry 1 (1970) 409–418
Negas, Journal of Solid State Chemistry 7 (1973) 85–88
Walton, Journal of Solid State Chemistry 178 (2005) 1683–1691

The degree of crystallinity and the lengths and widths of crystalline regions are important aspects of the fine structure of cellulosic fibers.
Australian Journal of Chemistry. 65(2012). 351-365
Sreenivasan, Layer morphology and its relation to swelling and structure: I.
Asian Journal of Chemistry. 28(2016). 1191
Tan, Study on crystal structures of enzyme-hydrolyzed cellulosic materials by X-ray diffraction.

Structures, Stabilites and Electronic Properties of Phenyl Silsesquioxanes Si2nO3nPh2n (n=1-5): A DFT Study Shu-Yuan Yu 1,a, Ze-Min Chen1, Cheng-Gen Zhang1,2,b, Yufang Ma1 1 Department of Chemistry and Material Science, Langfang Normal College, Langfang 065000, China 2 College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China ayushuyuan05@mails.gucas.ac.cn, bchgzhang04@mails.gucas.ac.cn Keywords: phenyl silsesquioxanes, HOMO–LUMO gaps, density functional theory Abstract.
A variety of silsesquioxanes structures have been prepared [12].
Structure 3a(D3) has a D3 symmetry and 1A1 electronic state (see Fig. 1).
Structures 3a(D3) and 3b(C3h) are almost isoenergetic.
Structures 4a(D4) and 4c(S4) are almost isoenergetic.

Moreover, the presence of polar groups in the hardeners' structures enhances adhesion to metal surfaces [3,6].
Kinetics of the polycondensation reaction of bisphenol disodium salts with 4,4-dichlorodiphenylsulfone. // Collection of "Questions of physical and chemistry of polymers", 1972.- p. 4-28
Chemistry and technology. 2001.T.44 issue 3.- p.27-30
Basics of polymer adhesion. - M .: Chemistry, 1969
Physical chemistry of polymers: a textbook for chem. fac. un-tov / A.

The scaffolds showed macroporous structure with interconnected porosity.
Ideally, a composite for bone regeneration should temporarily mimic the bone structure, allowing the progressive build up of native bone tissue.
Repeated structure of the disaccharide unit of the κ-carrageenan.
The structure of the apatite layer was analyzed by X-ray diffraction, FTIR spectroscopy and SEM.
Elliot, in: Structure and chemistry of the apatites and other calcium orthophosphates: studies in inorganic Chemistry (Elsevier, Amsterdam, 1994)

Extraction Behavior of Trivalent Rare Earth Metal Ions with Diphosphonic Acid Type Extraction Reagent Keisuke Ohto1,a*, Shinpei Nakashima1, Yudai Tanaka1, Shintaro Morisada1 and Hidetaka Kawakita1, Tatsuya Oshima2, 1Department of Chemistry and Applied Chemistry, Saga University, 1-Honjo, Saga 840-8502, Japan 2Department of Applied Chemistry, University of Miyazaki, 1-1-Gakuen Kibanadai Nishi, Miyazaki 889-2192, Japan aohtok@cc.saga-u.ac.jp Keywords: Diphosphonic acid, rare earth metal ions, extraction Abstract.
However, high separation efficiency was not obtained yet using such reagents probably due to less multiplier effect of functional groups and such specific structures.
The chemical structures of BPhPH10 and BPhPH16 are shown in Fig. 1.
Topp, Chemistry of the rare-earth elements (Topics in inorganic & general chemistry).
Hasegawa, Chap. 1 Introduction and Chap. 4 Solvent extraction systems, in Solvent extraction chemistry.

It includes programs that implement methods of molecular mechanics, quantum chemistry, and molecular dynamics.
Clark, Computer Chemistry, Mir Publishing, Moscow, 1990
Kim, Organic Chemistry, Sib. univ. press, Novosibirsk, 2002
Makki, Chemistry of metal-gas interface, Mir Publishing, Moscow, 1989
Salem, Physical Chemistry, Fizmatlit, Moscow, 2004.

ELHADRAMI2,b and Rachid BRAHMI3,c 1Coordination and Analytical Chemistry Laboratory (LCCA), Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, Morocco. 2Coordination and Analytical Chemistry Laboratory (LCCA), Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, Morocco. 3Coordination and Analytical Chemistry Laboratory (LCCA), Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, El Jadida, Morocco.
Firstly, the spent vanadium-based catalyst already used in the conversion of SO2 to SO3 in the form of star-shaped rings is ground for 2 minutes, then placed in a tubular furnace for the purpose of removing any gases which are disturbing the catalyst and which are also responsible for catalyst deactivation and decreasing catalytic activity such as SO2 and SO3 gases, and to increase the specific surface area of the catalyst in order to facilitate the dispesion of vanadium into the catalyst structure during the wet omprenation process, thus enabling thermal regeneration as follows: 5 °C/min 450 °C /1 h and 2 h 25 °C/min 25 °C/min Fig.1.
These results clearly indicate that the initial structure of the new catalyst cannot be completely restored after a long period of use (spent catalyst), due to the irreversible structural changes that occur over time.
This is par-ticularly illustrated by the transition from quartz to cristobalite, observed earlier, making it difficult, if not im-possible, to restore the original structure.