A novel chromatographic separation method for rapid enrichment and isolation of novel flavonoid glycosides from Sphaerophysa salsula

2020 ◽  
Vol 43 (21) ◽  
pp. 4018-4027
Author(s):  
Weidong Wang ◽  
Jun Dang ◽  
Yun Shao ◽  
Lei Jiang ◽  
Zenggen Liu ◽  
...  
Keyword(s):  
Chromatographic Separation ◽  
Separation Method ◽  
Flavonoid Glycosides ◽  
Sphaerophysa Salsula

Chromatographic separation mof flavonoid glycosides on different HPTLC plates

1996 ◽  
Vol 4 ◽  
pp. S167
Author(s):  
M.L. Bieganowaka ◽  
Z.A. Bieganowska-Klamut ◽  
A.J. Jósefczyk
Keyword(s):  
Chromatographic Separation ◽  
Flavonoid Glycosides

scholarly journals Flavonoid Glycosides from Endemic Bulgarian Astragalus aitosensis (Ivanisch.)

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1419 ◽  
Author(s):  
Hristo Vasilev ◽  
Samir Ross ◽  
Karel Šmejkal ◽  
Petr Maršík ◽  
Dagmar Jankovská ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Structural Analysis ◽  
Secondary Metabolites ◽  
Chromatographic Separation ◽  
2D Nmr ◽  
Biologically Active ◽  
Spectral Studies ◽  
Flavonoid Glycosides ◽  
Phenolic Components ◽  
First Time

Astragalus is a very interesting plant genus, well-known for its content of flavonoids, triterpenes and polysaccharides. Its secondary metabolites are described as biologically active compounds showing several activities, e.g., immunomodulating, antibacterial, antiviral and hepatoprotective. This inspired us to analyze the Bulgarian endemic A. aitosensis (Ivanisch.) to obtain deeper information about its phenolic components. We used extensive chromatographic separation of A. aitosensis extract to obtain seven phenolic compounds (1–7), which were identified using combined LC-MS and NMR spectral studies. The 1D and 2D NMR analyses and HR-MS allowed us to resolve the structures of known compounds 5–7 as isorhamnetin-3-O-robinobioside, isorhamnetin-3-O-(2,6-di-O-α-rhamno-pyranosyl-β-galactopyranoside), and alangiflavoside, respectively, and further comparison of these spectral data with available literature helped us with structural analysis of newly described flavonoid glycosides 1–4. These were described in plant source for the first time.

Preparative separation of seven polyphenols from Perillae Folium via pH-zone-refining counter-current chromatography combined with high-speed counter-current chromatography

2021 ◽  
Author(s):  
Lihua Xu ◽  
Tianyu Ma ◽  
Xinming Wang ◽  
Wei Liu ◽  
Jia Li ◽  
...  
Keyword(s):  
Phenolic Acids ◽  
High Speed ◽  
Separation Method ◽  
Flavonoid Glycosides ◽  
Zone Refining ◽  
Preparative Separation ◽  
Crude Sample ◽  
Counter Current

A separation method using pH-ZRCCC combined with HSCCC was proposed to separate the crude sample of Perillae Folium with different constituents and polarity, and three phenolic acids and four flavonoid glycosides were isolated successfully.

Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

1994 ◽  
Vol 52 ◽  
pp. 646-647
Author(s):  
J. Tong ◽  
L. Eyring
Keyword(s):  
Fracture Toughness ◽  
Phase Separation ◽  
Sol Gel ◽  
Great Influence ◽  
High Strength ◽  
Chemical Durability ◽  
Separation Method ◽  
Toughening Mechanism ◽  
Ceramic Films ◽  
Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

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