Results 21 to 30 of about 61,204 (295)
Molecules, 2011 The methanolic extract of Tabernaemontana catharinensis (Apocynaceae) roots, which contains alkaloids with several biological activities, was separated on a preparative scale using high-speed counter-current chromatography. The optimum solvent system was
Raimundo Braz-Filho +3 more
doaj +1 more source
Química Nova, 2005 Droplet counter-current chromatography, rotation locular counter-current chromatography and high-speed counter-current chromatography were applied to the preparative separation of the alkaloid ricinine from the dichloromethane extracts of Ricinus ...
Ana Cristina Leite +5 more
doaj +1 more source
Separation and purification of hydrolyzable tannin from Geranium wilfordii Maxim by reversed-phase and normal-phase highspeed counter-current chromatography [PDF]
, 2010 Three hydrolyzable tannins, geraniin, corilagin and gallic acid, main active components of Geranium wilfordii Maxim, have been separated and purified in one-step by both reversed-phase and normal-phase high-speed counter-current chromatography.
Wang, Changhai +5 more
core +1 more source
Fast Counter Current Chromatography of -Butanolic Fraction from (Asteraceae)
Natural Product Communications, 2009 Phenolic derivatives such as quinones, acid-phenols and flavonoids were successfully isolated from a n-butanolic fraction of Senecio giganteus Desf.
Nadjet Mezache +5 more
doaj +1 more source
Chiral Separations in Preparative Scale: A Medicinal Chemistry Point of View
Molecules, 2020 Enantiomeric separation is a key step in the development of a new chiral drug. Preparative liquid chromatography (LC) continues to be the technique of choice either during the drug discovery process, to achieve a few milligrams, or to a scale-up during ...
Madalena M.M. Pinto +2 more
doaj +1 more source
Facilitating insight into a simulation model using visualization and dynamic model previews [PDF]
, 2012 This paper shows how model simplification, by replacing iterative steps with unitary predictive equations, can enable dynamic interaction with a complex simulation process.
Cribbin, T, de Folter, J
core +1 more source
Preparative isolation and purification of astaxanthin from the microalga Chlorococcum sp. by high-speed counter-current chromatography [PDF]
, 2001 High-speed counter-current chromatography was applied to the isolation and purification of astaxanthin from microalgae. The crude astaxanthin was obtained by extraction with organic solvents after the astaxanthin esters were saponified.
F. Chen +5 more
core +3 more sources
Journal of Pharmaceutical Analysis, 2013 A high-speed counter-current chromatography (HSCCC) method was successfully developed for the preparative separation and purification of deoxyschizandrin from Schisandrae Sphenantherae Fructus in one step.
Xin-Ying Li +7 more
doaj +1 more source
Separation of natural polar substances by reversed-phase high-performance liquid chromatography, centrifugal thin-layer chromatography and droplet counter-current chromatography [PDF]
, 1985 Reversed-phase high-performance liquid chromatography, centrifugal thin-layer chromatography and droplet counter-current chromatography are complementary, highly efficient techniques for isolating natural, very polar, substances from plant sources.
Luisella Verotta +3 more
core +1 more source
Ceylon Journal of Science, 2016 Theaflavins (TFs) from black tea leaves were separated using high-speed countercurrent chromatography (HSCCC). Isobutyl methyl ketone (4-methyl-2-pentanone) was used to separate the TFs from a hot water extract of black tea leaves.
N. Savitri Kumar +2 more
doaj +1 more source