Results 161 to 170 of about 2,407 (196)

Isolation and Identification of Phenolic Compounds in the Fruit of Benincasa hispida by HSCCC

Journal of Liquid Chromatography & Related Technologies, 2005
Abstract Separation of phenolic components from the fruit Benincasa hispida was conducted using high‐speed countercurrent chromatography (HSCCC) with two solvent systems, n‐hexane–n–butanol–methanol–water (10:16:5:20, v/v) and n‐hexane–ethyl acetate–methanol–water (1:1:1:1, v/v). Three compounds, astilbin (120 mg), catechin (103 mg), and naringenin (79 
Qizhen Du, Qi Zhang, Yoichiro Ito
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Simultaneous Isolation and Purification of Mollugin and Two Anthraquinones from Rubia cordifolia by HSCCC

Chromatographia, 2008
A preparative high-speed countercurrent chromatography (HSCCC) method for isolation and purification of three bioactive components, tectoquinone; 1-hydroxy-2-methylanthraquinone and mollugin from the Chinese medicinal plant Rubia cordifolia was successfully established.
Rui Liu, Yanbin Lu, Tianxing Wu, Yuanjiang Pan   +3 more
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Preparative Isolation and Purification of Two Phenylpropanoids from Daphne giraldii Nitsche by HSCCC

Chromatographia, 2010
Preparative high-speed counter-current chromatography (HSCCC) was successfully applied to purify phenylpropanoids from the stem and root bark of Daphne giraldii Nitsche, a traditional Chinese medicine. Their structures were identified on the basis of 1H NMR and 13C NMR technology. The two-phase solvent system composed of n-hexane–ethyl acetate–methanol–
Feng-Yun Li, Zhan-Ping Gou, Xiao-Chi Ma, Yan Tian, Ge Tian, Chang-Yuan Wang, Dong-Hai Su, Ke Xin Liu, Xiu-Lan Xin   +8 more
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HSCCC‐MS Study of Flavonoids in the Extracts from the Seeds of Oroxylum indicum

Journal of Liquid Chromatography & Related Technologies, 2005
Abstract In this study, two analytical high‐speed countercurrent chromatography (HSCCC) instruments, interfaced directly with electrospray ionization and atmospheric pressure chemical ionization mass spectrometry, were explored for the separation of a mixture of three standard flavonoids.
L. J. Chen, H. Song, D. E. Games, I. A. Sutherland   +3 more
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Gradient Elution for Triterpene Separation from Cecropia lyratiloba Miquel by HSCCC

Journal of Liquid Chromatography & Related Technologies, 2005
Abstract The triterpenoid pool from the dichloromethane fraction obtained from the methanolic extract of roots of Cecropia lyratiloba Miquel was submitted to CCC using a gradient elution consisting of Hex/EtOAc/MeOH/H2O—1/2/X/1 (X=0.5 (A); 0.75 (B); 1.0 (C); 1.5 (D); 2.0 (E)) in five steps.
Rodrigo R. Oliveira, Gilda G. Leitão, Michelle C. C. Moraes, Maria Auxiliadora C. Kaplan, Daise Lopes, Jorge P. P. Carauta   +5 more
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Hyphenated HSCCC–DPPH· for Rapid Preparative Isolation and Screening of Antioxidants from Selaginella moellendorffii

Chromatographia, 2008
A method for rapid preparative isolation and screening of antioxidants has been developed by combining preparative HSCCC with on-line radical scavenging detection by use of DPPH· (1,1-diphenyl-2-picrylhydrazyl) as model radical. The HSCCC effluent was split into two parts. The major part was collected and the rest was introduced, through a switch valve,
Shuyun Shi, Honghao Zhou, Yuping Zhang, Kelong Huang   +3 more
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High Speed Countercurrent Chromatography/Fourier Transform Infrared (HSCCC/FT-IR) Spectrometry

SPIE Proceedings, 1985
High Speed Countercurrent Chromatography/Fourier transform infrared (HSCCC/FT-IR) spectrometry is present-ed. High solute-to-solvent ratios can be obtained in separations performed using HSCCC. At these high solute concentrations it is possible to obtain spectra of solutes without solvent elimination, even in the presence of polar solvents, such as ...
Rodolfo J. Romanach, James A. de Haseth
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Structural Investigation of the Antibiotic Sporaviridin. XV. Preparative-Scale Preparation of Sporaviridin Components by HSCCC

Journal of Liquid Chromatography, 1990
Abstract Preparative-scale separation of the six sporaviridin components, very complicated basic glycoside antibiotics produced by Streptosporangium viridogriseum, was carried out by high speed countercurrent chromatography (HSCCC). The following two points, selection of proper solvent system and stationary phase retention, were carefully examined ...
Ken-Ichi Harada, Ikumi Kimura, Akiko Yoshikawa, Makoto Suzuki, Hiroyuki Nakazawa, Shigehiko Hattori, Kyoichi Komori, Yoichiro Ito   +7 more
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Separation of three flavonoid glycosides from Polygonum multiflorum Thunb. leaves using HSCCC and their antioxidant activities

European Food Research and Technology, 2021
Mingfang Cao, Jing Wu, Lei Wu, Zhen Gu, Chuan-Qi Xie, Lei Wu, Ju-Wu Hu, Gangfang Xu   +7 more
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Preparative Isolation and Purification of Linderalactone and Lindenenol from Radix linderae by HSCCC

Journal of Liquid Chromatography & Related Technologies, 2006
Abstract A preparative high speed countercurrent chromatography (HSCCC) method for isolation and purification of sesquiterpene lactone compounds from the Chinese traditional medicinal herb Radix linderae (Wuyao in Chinese) was successfully established by using light petroleum‐ethyl acetate‐methanol‐water (5∶5∶6∶4, v/v) as the two phase solvent system ...
Qinghua Sun, Ailing Sun, Renmin Liu
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