60965-81-3Relevant 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.
HYDRAZINOLYSIS OF MONOSACCHARIDES: A TWO-STEP SYNTHESIS OF CHIRAL PENTANE-1,2,3-TRIOLS FROM PENTOSES AND OBSERVATIONS ON THE HYDRAZINOLYSIS OF GLYCOPROTEINS AND GLYCOPEPTIDES
Williams, J. Michaels
, p. 73 - 78 (2007/10/02)
1,2-Dideoxyalditols, the corresponding 1-alkenes, and 1-deoxyalditols are formed in various proportions from D-glucose, D-mannose, L-arabinose, and D-xylose by the action of refluxing hydrazine.Sequential hydrazinolysis, catalytic hydrogenation, and chromatography afford a route to 1,2-dideoxyalditols.For example, 1,2-dideoxy-L-erythro-pentitol is formed from L-arabinose in 42percent yield, and D-xylose is a source of 1,2-dideoxy-D-threo-pentitol (50percent).Under the conditions (anhydrous hydrazine at 100 deg C for 30 h in the absence of air) used Montreuil for the hydrazinolysis of glycoproteins and glycopeptides, no 1,2-dideoxialditol was formed; degradation was incomplete, there being some aldose hydrazone present.Under Kochetkov's hydrazinolysis conditions (105 deg C for 10 h with hydrazinium sulphate), less degradation occured and product from D-galactose was identified as 1-deoxy-D-tagatose hydrazone.
