Results 31 to 40 of about 15,904,426 (181)

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

Countercurrent chromatography in analytical chemistry (IUPAC technical report) [PDF]

, 2009
© 2009 IUPACCountercurrent chromatography (CCC) is a generic term covering all forms of liquid-liquid chromatography that use a support-free liquid stationary phase held in place by a simple centrifugal or complex centrifugal force field. Biphasic liquid
Sutherland, IA, Ian A. Sutherland, Tatyana Maryutina, Maryutina, T, Spivakov, B, Boris Spivakov, Shpigun, O, Berthod, A, Alain Berthod, Oleg Shpigun, Sutherland, Ian A., Iqbal, M. S., Torto, N., Lobinski, Ryszard, Labuda, J., Mester, Z., Motomizu, S., Trendafilova, N., Shpigun, Oleg, Smith, R. M., Knox, D. E., Lund, W., Fajgelj, A., Spivakov, Boris, Camoes, M., Maryutina, Tatyana, De Zorzi, P., Berthod, Alain, Hibbert, B., Chai, Z., Apak, R., Minkkinen, P., De Bieyre, P., Felinger, A., Aggarwal, S. K., Pingaron, J., Jarosz, M., Kim, H.   +37 more
core   +2 more sources

Advanced modelling and visualisation of liquid-liquid separations of complex sample components, with variable phase distribution and mode of operation [PDF]

, 2013
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This research is about liquid-liquid chromatography modelling.
De Folter, Jozefus Johannes Martinus
core   +7 more sources

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

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

Comprehensive Polyphenolic Profile of Plantago depressa using High-Speed Countercurrent Chromatography Off-line with High-Performance Liquid Chromatography–Diode Array Detector–Quadrupole Time-of-flight Tandem Mass Spectrometry

eFood, 2019
The whole plant of Plantago depressa is commonly used as traditional Chinese medicine and functional food ingredient. Total phenolic content and total flavonoid content evaluation indicated that its ethyl acetate and n-butanol fractions were rich in ...
Jinju Xu, Chaoying Tong, Qiachi Fu, Keke Guo, Shuyun Shi, Yecheng Xiao   +5 more
doaj   +1 more source

(6,9)-6″-(4″-Hydroxybenzoyl)-Roseoside, a New Megastigmane Derivative from and its Effect on Hepatic Glucose-6-phosphatase

Natural Product Communications, 2012
A new megastigmane derivative, (6 R ,9 S )–6′-(4″-hydroxybenzoyl)-roseoside ( 1 ) and two known compounds, the biflavoneagathisflavone ( 2 ) and 4-hydroxy-benzoic acid ( 3 ) were isolated and purified from leaves and stems of Ouratea polyantha Engl ...
Jairo Bermúdez, María Rodríguez, Masahisa Hasegawa, Freddy González-Mujica, Sandra Duque, Yoichiro Ito   +5 more
doaj   +1 more source

Research Progress on Extraction, Separation, Purification and Detection Technology of Limonins in Citrus

Shipin gongye ke-ji, 2023
Citrus is the largest fruit in the world, and a large number of citrus processing by-products are produced every year. These by-products are rich in limonoids, which have many physiological functions such as anti-tumor, anti-inflammatory and anti-virus ...
Yemei WANG, Jiangnan LI, Huiping YIN, Yaohai ZHANG, Aihua CHEN, Xuesu SU, Bining JIAO   +6 more
doaj   +1 more source