Results 21 to 30 of about 8,771,743 (176)

Application of Preparative High-Speed Counter-Current Chromatography for the Separation of Two Alkaloids from the Roots of Tabernaemontana catharinensis (Apocynaceae)

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, Ivo J. Curcino Vieira, Rodrigo R. Oliveira, Milena S. Gonçalves   +3 more
doaj   +1 more source

Isolamento do alcalóide ricinina das folhas de Ricinus communis (Euphorbiaceae) através de cromatografias em contracorrente Isolation of the alkaloid ricinine from the leaves of Ricinus communis (Euphorbiaceae) through counter-current chromatography

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, Elaine Cristina Cabral, Djalma Antônio P. dos Santos, João Batista Fernandes, Paulo Cezar Vieira, M. Fátima das G. F. da Silva   +5 more
doaj   +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, Séverine Derbré, Salah Akkal, Hocine Laouer, Denis Séraphin, Pascal Richomme   +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, Carla Fernandes, Maria E. Tiritan   +2 more
doaj   +1 more source

Preparative separation and purification of deoxyschizandrin from Schisandrae Sphenantherae Fructus by high-speed counter-current chromatography

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, Mei Yang, Jie-Yun Huang, Xiao-Xue Yu, Min-Qian Zhao, Zhi-Kun Liang, Zhi-Sheng Xie, Xin-Jun Xu   +7 more
doaj   +1 more source

Preparative separation of polyphenols from artichoke by polyamide column chromatography and high-speed counter-current chromatography

Química Nova, 2013
An efficient method for the rapid separation and purification of polyphenols from artichoke by polyamide column chromatography in combination with high-speed counter-current chromatography (HSCCC) was successfully built.
Xikai Shu, Mei Wang, Daicheng Liu, Daijie Wang, Xiaojing Lin, Jianhua Liu, Xiao Wang, Luqi Huang   +7 more
doaj   +1 more source

COUNTER code of practice : books and reference works [PDF]

, 2006
COUNTER proporciona un conjunto de normas internacionales extensibles que permiten el uso en línea de productos de información y servicios para ser medidos de una forma fiable, consistente y compatible utilizando los datos generados por los proveedores ...
COUNTER project
core   +4 more sources

The hexane-ethyl acetate-methanol-water system for the separation of theaflavins from black tea (Camellia sinensis) using high-speed counter-current chromatography

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, P. A. Nimal Punyasiri, W. A. M. B. Wijekoon   +2 more
doaj   +1 more source

Separation and Preparation of Sanguinarine and Chelerythrine from Macleaya cordata Root by High Speed Counter-Current Chromatography

Shipin gongye ke-ji, 2022
The aim of this study was to develop a method for the separation and preparation of high purity sanguinarine and chelerythrine by conventional high speed counter-current chromatography.
Changqing JIA, Rui MA, Xicheng QIAN, Dandan WANG, Jiansheng YU   +4 more
doaj   +1 more source

Preparative separation and purification of bufadienolides from ChanSu by high-speed counter-current chromatography combined with preparative HPLC

Química Nova, 2013
Eight bufadienolides were successfully isolated and purified from ChanSu by high-speed counter-current chromatography (HSCCC) combined with preparative HPLC (prep-HPLC).
Jialian Li, Yongqing Zhang, Yunliang Lin, Xiao Wang, Lei Fang, Yanling Geng, Qinde Zhang   +6 more
doaj   +1 more source