Results 21 to 30 of about 951 (168)

Isolation of Two New Phenolic Glycosides from Castanopsis chinensis Hance by Combined Multistep CC and HSCCC Separation and Evaluation of Their Antioxidant Activity

Molecules, 2023
The characteristics of high polarity and susceptibility to oxidation in phenolic glycosides increase the difficulty of their separation from natural products.
Ya-Feng Wang, Ping Lin, Yong-Lin Huang, Rui-Jie He, Bing-Yuan Yang, Zhang-Bin Liu   +5 more
doaj   +1 more source

The kidney antifibrotic effects of 5,7,3′,4′,5′-pentamethoxyflavone from Bauhinia championii in streptozotocin-induced diabetic rats: in vivo and in vitro experiments

Pharmaceutical Biology, 2023
Context The antidiabetic effects of flavonoids have been reported, but it is still unclear whether 5,7,3′,4′,5′-pentamethoxyflavone, isolated from Bauhinia championii Benth.
Jialin Li, Xiaocui Huang, Kailun He, Suzhen Wu   +3 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

Chiral (Stereoselective) Drugs, Asymmetric Synthesis, and Racemic Resolution Methods. [PDF]

Chirality
Chirality is crucial in drug development since both biological targets in the organism and the majority of pharmaceutical compounds are chiral. The synthesis and resolution of chiral compounds are critical steps while developing chiral drugs. Asymmetric synthesis and racemic resolution are the two most common methods for obtaining enantiopure drugs ...
Karayavuz B, Kirmizioglu CK.
europepmc   +2 more sources

COMMENTS ON VAN DEEMTER PLOT IN HIGH SPEED COUNTERCURRENT CHROMATOGRAPHY [PDF]

Journal of Liquid Chromatography & Related Technologies, 2001
An inaccuracy in the computation of the linear mobile phase velocity rendered the whole content of a recently published article, Q.Z. Du, P.D. Wu, Y, Ito, J. Liq. Chromatogr. & Rel. Technol., 23(19), 2929 (2000), erroneous. Since the stationary phase volume was given, the correct mobile phase velocity values were computed and the new values for the Van
Berthod, Alain, Foucault, Alain
openaire   +1 more source

Enrichment and Determination of Zinc by High-Speed Countercurrent Chromatography

Analytical Sciences, 2002
The capability of high-speed countercurrent chromatography (HSCCC) has been investigated for enrichment and determination of metal ions at trace levels. Separation of selected divalent metal ions was performed using a small coiled column. A hexane solution of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPA) was employed as the stationary ...
HOSODA, Akihiro, TSUYOSHI, Akira, AKIBA, Kenichi   +2 more
openaire   +3 more sources

Preparative Isolation of Antimycobacterial Shoreic Acid from by High Speed Countercurrent Chromatography

Natural Product Communications, 2008
High speed countercurrent chromatography (HSCCC) was used to isolate the dammarane type triterpene shoreic acid from the dichloromethane extract of leaves of Cabralea canjerana , which showed activity against Mycobacterium tuberculosis .
Gilda G. Leitão, Lisandra F. Abreu, Fernanda N. Costa, Thiago B. Brum, Daniela Fernandes Ramos, Pedro Eduardo A. Silva, Maria Cristina S. Lourenço, Suzana G. Leitão   +7 more
doaj   +1 more source

Separation of Flavonoids and Purification of Chlorogenic Acid from Bamboo Leaves Extraction Residues by Combination of Macroporous Resin and High-Speed Counter-Current Chromatography

Molecules, 2023
Flavonoids are major active small-molecule compounds in bamboo leaves, which can be easily obtained from the bamboo leaves extraction residues (BLER) after the polysaccharides extraction.
Yifeng Zhou, Meixu Chen, Xinyi Huo, Qilin Xu, Linlin Wu, Liling Wang   +5 more
doaj   +1 more source

Silver Ion-Complexation High-Speed Countercurrent Chromatography Coupled with Prep-HPLC for Separation of Sesquiterpenoids from Germacrene A Fermentation Broth

Fermentation, 2021
A silver ion high-speed counter-current chromatography ([Ag+]-HSCCC) was developed to separate and purify five sesquiterpenoids from germacrene A fermentation broth. The solvent system was consisted of n-hexane-methanol-silver nitrate (3 mol/L) solution (
Huanzhu Zhao, Xiangyun Song, Iftikhar Ali, Manzoor Hussain, Andleeb Mehmood, Baraa Siyo, Qianshan Gao, Li Cui, Shahid Aziz, Hidayat Hussain, Wenya Ma, Dawei Qin, Daijie Wang   +12 more
doaj   +1 more source

A Protocol for Characterizing Comprehensive Two-Dimensional Liquid Chromatography Systems. [PDF]

J Sep Sci
ABSTRACT Comprehensive two‐dimensional liquid chromatography (LC × LC) is an effective strategy to increase peak capacity and improve separation performance for complex samples, offering a valuable alternative to conventional one‐dimensional liquid chromatography (1D‐LC).
Aebischer MK, Pardon M, Gadot C, Arena K, Carstensen N, Laemmerhofer M, Dugo P, Cacciola F, Mondello L, Sarrut M, Cabooter D, Heinisch S, Guillarme D.   +12 more
europepmc   +2 more sources