6778-35-4Relevant academic research and scientific papers
A novel low-molecular-mass pumpkin polysaccharide: Structural characterization, antioxidant activity, and hypoglycemic potential
Huang, Linlin,Li, Fei,Li, Quanhong,Liang, Li,Wei, Yunlu,Yu, Guoyong
, (2020/10/02)
The novel natural low-molecular-mass polysaccharide (SLWPP-3) from pumpkin (Cucurbia moschata) was separated from the waste supernatant after macromolecular polysaccharide production and purified using a DEAE cellulose-52 column and gel-filtration chromatography. Chemical and instrumental studies revealed that SLWPP-3 with a molecular mass of 3.5 kDa was composed of rhamnose, glucose, arabinose, galactose and uronic acid with a weight ratio of 1: 1: 4: 6: 15, and primarily contained →3,6)-β-D-Galp-(1→, →4)-α-GalpA-(1→(OMe), →4)-α-GalpA-(1→, →2,4)-α-D-Rhap-(1→, →3)-β-D-Galp-(1→, →4)-α-D-Glcp, and →4)-β-D-Galp residues in the backbone. The branch chain passes were connected to the main chain through the O-4 atom of glucose and O-3 atom of arabinose. Physiologically, the ability of SLWPP-3 to inhibit carbohydrate-digesting enzymes and DPPH and ABTS radicals, as well as protect pancreatic β cells from oxidative damage by decreasing MDA levels and increasing SOD activities, was confirmed. The findings elucidated the structural types of pumpkin polysaccharides and revealed a potential adjuvant natural product with hypoglycemic effects.
Isolation and characterization of a new allelochemical from seeds of Adenanthera pavonina linn
Yadava,Vishwakarma, Umesh Kumar
, p. 4902 - 4904 (2013/07/28)
A new allelochemical (1), m.p. 282-284 °C, m.f. C31H 36O19, [M]+ 712 (FABMS), has been isolated from methanolic extract of the seeds of Adenanthera pavonina Linn. alongwith two known compounds 2',4',7-trihydroxy isoflavone and isovitexin. The structure of a new compound was characterized as 3,5,7,3',4'-pentahydroxy flavone-3'-O-α-L- rhamnopyranosyl-(1→4)-O-α-L-arabinopyranosyl-(1→3)- O-b-D- xylopyranoside, by various colour reactions, spectral analysis and chemical degradations.
Structural analysis of the O-polysaccharide of the lipopolysaccharide from Azospirillum brasilense Jm6B2 containing 3-O-methyl-D-rhamnose (D-acofriose)
Boyko, Alevtina S.,Dmitrenok, Andrey S.,Fedonenko, Yuliya P.,Zdorovenko, Evelina L.,Konnova, Svetlana A.,Knirel, Yuriy A.,Ignatov, Vladimir V.
experimental part, p. 92 - 95 (2012/09/07)
Two types of neutral O-polysaccharides were obtained by mild acid degradation of the lipopolysaccharide isolated by phenol-water extraction from the asymbiotic diazotrophic rhizobacterium Azospirillum brasilense Jm6B2. The following structure of the major O-polysaccharide was established by composition and methylation (ethylation) analyses, Smith degradation, and 1D and 2D 1H and 13C NMR spectroscopy: α-D-Rhap3OMe 1↓3→4)-α-L-Fucp-(1→4)-β-D-Xylp-(1→ where a non-stoichiometric (～60%) 3-O-methylation of D-rhamnose is indicated by italics.
