Results 101 to 110 of about 1,452 (205)

Countercurrent chromatography separation of saponins by skeleton type from Ampelozizyphus amazonicus for off-line ultra-high-performance liquid chromatography/high resolution accurate mass spectrometry analysis and characterisation

, 2017
Ampelozizyphus amazonicus Ducke (Rhamnaceae), a medicinal plant used to prevent malaria, is a climbing shrub, native to the Amazonian region, with jujubogenin glycoside saponins as main compounds.
Hewitson, Peter, PICCINELLI, ANNA LISA, de Sousa Silva, D, Rastrelli, L, CELANO, RITA, de Souza Figueiredo, F, de Souza Figueiredo, Fabiana, das Neves Costa, Fernanda, Ignatova, S, Celano, R, Guimarães Leitão, Suzana, das Neves Costa, F, Guimarães Leitão, G, de Sousa Silva, Danila, RASTRELLI, Luca, Piccinelli, AL, Guimarães Leitão, S, Guimarães Leitão, Gilda, Hewitson, P, Ignatova, Svetlana   +19 more
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Two-Step Separation of Nostotrebin 6 from Cultivated Soil Cyanobacterium (Nostoc sp.) by High Performance Countercurrent Chromatography

Molecules, 2014
High performance countercurrent chromatography (HPCCC) was successfully applied for the separation of nostotrebin 6 from cultivated soil cyanobacteria in a two-step operation.
José Cheel, Petra Kučerová, Ian Garrard, Svetlana Ignatova, Pavel Hrouzek, Jiří Kopecký   +5 more
doaj   +1 more source

Preparative isolation of closely-related xanthones from Gentianella amarella ssp. acuta by High-speed countercurrent chromatography

, 2008
Introduction - A methanolic extract from Gentianella amarella ssp. acuta was shown to contain several xanthones exhibiting acetylcholinesterase inhibitory activity. These xanthones were difficult to separate by conventional LC techniques, which prevented
Urbain, Aurélie, Purev, Ondognii, Hostettmann, Kurt, Marston, Andrew, Batsuren, Dulamjav   +4 more
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Kaempferol separated from Camellia oleifera meal by high-speed countercurrent chromatography for antibacterial application. [PDF]

Eur Food Res Technol, 2020
Qiu Y, He D, Yang J, Ma L, Zhu K, Cao Y.
europepmc   +1 more source

Synthesis of medronic acid monoesters and their purification by high-performance countercurrent chromatography or by hydroxyapatite

, 2016
We achieved the synthesis of important medronic acid monoalkyl esters via the dealkylation of mixed trimethyl monoalkyl esters of medronic acid. Two methods were developed for the purification of medronic acid monoesters: 1) small scale (10–20 mg ...
Elina Puljula, Petri A. Turhanen, Jouko Vepsäläinen   +2 more
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Rapid Isolation and Purification of Phorbol Esters from Jatropha curcas by High-Speed Countercurrent Chromatography

, 2016
In this work, a high-speed countercurrent chromatography (HSCCC) method was established for the preparation of phorbol esters (PEs) from Jatropha curcas.
Zhanguo Wang (1394074), Wan Hua (1635286), Fang Chen (34476), Lin Tang (65412), Tong Peng (709503), Huiling Hu (1635283)   +5 more
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Isolation of flavanol-anthocyanin adducts by countercurrent chromatography

, 2005
International audiencePigments of the flavanol-anthocyanin (F-A+) type detected earlier in wine are synthesized using a protocol adapted from the synthesis of procyanidin dimers.
Winterhalter, P., Poncet-Legrand, Celine, Cheynier, Veronique, V., Kohler, N., Fulcrand, Hélène, Meudec, Emmanuelle, Salas, Erika   +6 more
core   +1 more source

Development of fast ion chromatography [PDF]

, 2005
Fast ion chromatography has been applied to short (3 cm) silica based ODS columns with a view to achieving rapid determinations of selected inorganic anions.
Connolly, Damian
core  

Structure optimization and performance analysis of a п-type double-supported high-speed countercurrent chromatography rotor system

四川大学学报. 自然科学版
Rotor system is one of the core components of countercurrent chromatograph and plays a key role in the realization of high efficiency separation function of high-speed countercurrent chromatograph.In this paper， aiming at the problems such as heavy ...
CHEN Jia-Yi, CHEN Hai-Jun, HU Xiao-Bing, GAO Yun-Kai   +3 more
doaj  

The efficiency of substance separation in countercurrent liquid chromatography

, 2003
This is an open access article that can be found from the links below - Copyright @ 2003 Springer VerlagThe effect of hydrodynamic parameters and the specific features of instrument design on the efficiency of substance separation in countercurrent ...
Sutherland, IA, Maryutina, TA, Ignatova, SN, Spivakov, BY   +3 more
core   +1 more source