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

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24267-24279 ◽  
Author(s):  
Shanti Devi ◽  
Ajeet K. Lakhera ◽  
Vineet Kumar

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.

1995 ◽  
Vol 276 (1) ◽  
pp. 167-181 ◽  
Author(s):  
I. Braccini ◽  
C. Hervédu Penhoat ◽  
V. Michon ◽  
R. Goldberg ◽  
M. Clochard ◽  
...  

2013 ◽  
Vol 62 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Wei-Ming Chai ◽  
Chih-Min Chen ◽  
Yu-Sen Gao ◽  
Hui-Ling Feng ◽  
Yu-Mei Ding ◽  
...  

1993 ◽  
Vol 248 ◽  
pp. 285-301 ◽  
Author(s):  
William S. York ◽  
Lisa K. Harvey ◽  
Rafael Guillen ◽  
Peter Alberhseim ◽  
Alan G. Darvill

2013 ◽  
Vol 807-809 ◽  
pp. 2174-2177
Author(s):  
Tao He

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.


2006 ◽  
Vol 61 (1-2) ◽  
pp. 19-25 ◽  
Author(s):  
Marcos J. Salvador ◽  
Eliane O. Ferreira ◽  
Susanne U. Mertens-Talcott ◽  
Whocely Victor De Castro ◽  
Veronika Butterweck ◽  
...  

Abstract Phytochemical analysis of the antioxidant ethanolic extract of Alternanthera tenella Colla led to the isolation of six flavonoids, acacetin 8-C-[α-ʟ-rhamnopyranosyl-(1→2)-β-ᴅ-glucopyranoside] (1), 2″-O-α-ʟ-rhamnopyranosyl-vitexin (2), 2″-O-β-d-glucopyranosyl-vitexin (3), vitexin (4), quercetin (5) and kaempferol (6). All the structures were established by ESIMS and NMR spectroscopic methods. Antioxidant capacity of extract, fractions and isolated compounds was determined using the oxygen radical absorbance capacity (ORAC) assay and extract, fractions and flavonoids isolated showed antioxidant activity in vitro. Moreover, the total soluble phenolic contents of the extract and fractions were measured using the Folin- Ciocalteau reagent and the quantitative analysis of flavone C-glycosides major constituents was performed by HPLC


2013 ◽  
Vol 448-453 ◽  
pp. 3728-3731
Author(s):  
Jian Hua Zhao ◽  
Jia Jun Ma

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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