Structural analysis of cyclamen seed xyloglucan oligosaccharides using cellulase digestion and spectroscopic methods

Crystal is of people's favorite now. Many people had done lots of work to explore the coloration mechanism of crystals, and until now there is no complete conclusion. So, we studied the coloration mechanism of synthetic crystal and nature crystal by the Violet-Visible Spectroscopy and radio-luminescence. The results showed that coloration mechanism of color rock crystals (amethyst, citrine, smoky quartz and rose quartz) were color center coloration.

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Structural analysis and antioxidant activity of an arabinoxylan from Malvastrum coromandelianum L. (Garcke)

RSC Advances ◽

10.1039/c9ra01629e ◽

2019 ◽

Vol 9 (42) ◽

pp. 24267-24279 ◽

Cited By ~ 2

Author(s):

Shanti Devi ◽

Ajeet K. Lakhera ◽

Vineet Kumar

Keyword(s):

Antioxidant Activity ◽

Structural Analysis ◽

Spectroscopic Methods ◽

Malvastrum Coromandelianum

The structure of MAP was studied by degradative, derivatization and spectroscopic methods, and it was found to be an arabinoxylan comprising a backbone of →4)-β-d-linked Xylp(1→ with branching at O-2 by →3)-α-l-Araf(1→ and →3)-β-d-Xylp(1→ chains.

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Spectroscopic Methods Used for Structural Analysis of Natural Crystals

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.448-453.3728 ◽

2013 ◽

Vol 448-453 ◽

pp. 3728-3731

Author(s):

Jian Hua Zhao ◽

Jia Jun Ma

Keyword(s):

Crystal Growth ◽

Structural Analysis ◽

Detection Methods ◽

Manual Control ◽

Spectroscopic Methods ◽

Color Distribution ◽

Natural Crystal

Most of the natural crystal color distribution are more uniform, different shades, pastel colors, while in manual control is relatively stable under the conditions of the synthesis of crystal growth, its internal characteristics exhibited excessive uniformity, color uniform, uniform, gaudy, dull, colorant concentration is too high or too low, make crystal color appears too deep or too shallow phenomenon. This paper studies the characteristics of natural crystal detection methods.

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Immobilization of Hydride Tungsten Complex in Microporous Structures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.514-516.1196 ◽

2006 ◽

Vol 514-516 ◽

pp. 1196-1200 ◽

Cited By ~ 1

Author(s):

Filomena Costa ◽

António Maurício C. Fonseca ◽

Isabel Neves ◽

Ana P. Carvalho ◽

João Pires

Keyword(s):

Structural Analysis ◽

Liquid Phase ◽

Nitrogen Adsorption ◽

Steric Effects ◽

Spectroscopic Methods ◽

New Materials ◽

Nay Zeolite ◽

Host Matrix ◽

Layered Clay ◽

Nitrogen Adsorption Isotherms

A hydride tungsten complex, [WH2(η2-OOCCH3)(Ph2PCH2CH2PPh2)2][BPh4], was entrapped in the interlayer of a pillared layered clay (PILC) and in NaY zeolite. The adsorption of the complex in the liquid phase was the immobilization process used. The free complex and the new materials were characterized by several techniques: structural analysis by DRX, nitrogen adsorption isotherms and spectroscopic methods (ICP-AES, FTIR and UV/Vis). Analysis of the data indicates that the tungsten(IV) complex is immobilized in the host microporous structures, and exhibit structural properties that are different from those of the free complex. These differences could arise either from distortions caused by steric effects imposed by the structures or from interactions with the host matrix.

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