Results 171 to 180 of about 1,915 (220)

Application of High Speed Countercurrent Chromatography (HSCCC) to the Isolation of Kavalactones

Journal of Liquid Chromatography and Related Technologies, 2005
Abstract High speed countercurrent chromatography (HSCCC) was used to isolate the major kavalactones kavain, 7,8‐dihydrokavain, methysticin, 7,8‐dihydromethysticin, yangonin, and demethoxyyangonin. An ethanolic crude extract of kava root was subjected to HSCCC separation. Due to the presence of polymeric material, the sample load was limited.
Peter Winterhalter
exaly   +2 more sources

UV‐Guided Isolation of Fungal Metabolites by HSCCC

Journal of Liquid Chromatography & Related Technologies, 2005
Abstract Analytical standardised reversed phase liquid chromatography (RPLC) data can be helpful in finding a suitable solvent combination for isolation of fungal metabolites by high‐speed counter current chromatography. Analysis of the distribution coefficient (K D) of fungal metabolites in a series of biphasic systems consisting of n‐heptane–ethyl ...
Petur W. Dalsgaard   +2 more
openaire   +1 more source

Separation of polysaccharides from Spirulina platensis by HSCCC with ethanol-ammonium sulfate ATPS and their antioxidant activities

Carbohydrate Polymers, 2017
Three separation methods for water-soluble polysaccharides from Spirulina platensis (PSP) were compared, including sevage deproteinization and column chromatography, ethanol-ammonium sulfate aqueous two-phase system (ATPS) and column chromatography, and one-step high speed counter-current chromatography (HSCCC) with ethanol-ammonium sulfate ATPS.
Yang Liu
exaly   +3 more sources

Preparation and Purification of Epigallocatechin by High‐Speed Countercurrent Chromatography (HSCCC)

Journal of Liquid Chromatography and Related Technologies, 2004
Abstract Epigallocatechin (EGC) was prepared by the degallation of Epigallocatechin‐O‐3‐gallate (EGCG). EGCG was completely converted to EGC and gallic acid by adding 4 mg tannase/100 mg EGCG at the concentration of 2 mg/mL under pH 6.0, at 35°C for 30 min.
Xue-Li Cao, Yoichiro Ito
exaly   +2 more sources

HSCCC Separation of a Stilbene Glucoside from Polygonum Multiflorum

Journal of Liquid Chromatography & Related Technologies, 1998
Abstract High-speed countercurrent chromatography (HSCCC) was applied to the separation and purification of 2,3,5,4′-tetrahydroxy stilbene-2-O-D-glucoside from dried roots (2.7g) of Polygonum multiflorum. The ethanol extract (240 mg) was first separated with the solvent system composed of ethyl acetate-ethanol-water at a volume ratio of 10:1:10 and the
Xueli Cao   +5 more
openaire   +1 more source

Separation of Flavonoids from the Leaves of Oroxylum indicum by HSCCC

Chromatographia, 2008
A high-speed counter-current chromatography system (HPCCC) capable of rapid processing has been employed to separate seven flavonoids from a methanolic extract of the leaves of Oroxylum indicum by a one-step isocratic elution using a chloroform–methanol–water (9.5:10:5) two-phase system. LC, MS and NMR have identified the components from the extract as
Yuan Yuan   +6 more
openaire   +1 more source

Rapid and Simple Method for Quality Control of Raw Materials of Herbs by HSCCC

Journal of Liquid Chromatography & Related Technologies, 2007
Abstract The component of the traditional Chinese medicine (TCM) can be influenced by soils, climates, and growth stages. The quality of TCM mostly depends on the quality of the raw materials of the used herbs. A portable instrument and simple analysis method are urgently needed to be used for quality control of the raw herbs. In this study, analytical
Xiao Wang   +3 more
openaire   +1 more source

HSCCC separation and enantiomeric distribution of key volatile constituents of Piper claussenianum (Miq.) C. DC. (Piperaceae)

open access: yesFood and Chemical Toxicology, 2017
High Speed Countercurrent Chromatography (HSCCC) technique was used for the preparative isolation of the major leishmanicidal compounds from the essential oils of Piper claussenianum species in Brazil. The essential oils from inflorescences of P. claussenianum were analyzed by GC-FID and GC-MS. The enantiomeric ratio of the major constituents of the P. 
Andre M Marques
exaly   +3 more sources

PREPARATIVE ISOLATION AND PURIFICATION OF LUTONARIN AND SAPONARIN FROM BARLEY SEEDLINGS BY HSCCC

Journal of Liquid Chromatography & Related Technologies, 2012
In order to isolate large amounts of pure lutonarin and saponarin, a high performance method for isolation and purification of these two flavonoids from barley (Hordeum vulgare) seedlings was successfully established by utilizing high-speed counter-current chromatography (HSCCC). Separation was performed with a two-phase solvent system: ethyl acetate/n-
Tao Chen   +4 more
openaire   +1 more source

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