Results 121 to 130 of about 1,990 (174)

Progress of chiral countercurrent chromatography

Chinese Journal of Chromatography, 2016
This article summarizes five characteristics of chiral countercurrent chromatography (CCC). The progress of chiral countercurrent chromatography is introduced. In the high speed countercurrent chromatography, the chiral selectors such as amino acid derivatives, cyclodextrin derivatives, chiral organic acid, polysaccharide and bovine serum albumin (BSA)
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Advances in Countercurrent Chromatography For Protein Separations

Bioanalysis, 2012
Countercurrent chromatography (CCC) is a preparative purification technique working with biphasic liquid systems. One phase of the liquid system is selected to be the mobile phase, the other phase is the stationary phase, held still by centrifugal fields. Aqueous two-phase systems (ATPS) have demonstrated their use in biological purifications.
Mekaoui, Nazim, Faure, Karine, Berthod, Alain   +2 more
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Dual Countercurrent Chromatography

Journal of Liquid Chromatography, 1988
Abstract A modern method of performing conventional countercurrent distribution called Dual Countercurrent Chromatography is described. The system consists of a multilayer coiled column integrated with two inlet and two outlet lines for solvent phases and a sample feed line. Subjecting the system to a particular combination of centrifugal and planetary
Y.-W. Lee, C. E. Cook, Y. Ito
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multifraction separation in countercurrent chromatography (MCSGP)

Biotechnology and Bioengineering, 2013
ABSTRACTThe multicolumn countercurrent solvent gradient purification (MCSGP) process is a continuous countercurrent multicolumn chromatography process capable of performing three fraction separations while applying a linear gradient of some modifier.
M. Krättli, T. Müller Späth, MORBIDELLI, MASSIMO   +2 more
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Resolution in Countercurrent Chromatography

Journal of Liquid Chromatography, 1985
Abstract Using as an example the separation of DNP-glutamic acid and DNP-alanine in a nonplanetary countercurrent chromatograph, it was demonstrated that resolution, Rs, of a solute pair can be satisfactorily predicted from knowledge of the column efficiency, N, the fraction of column volume occupied by stationary phase, SF, and the partition ...
Walter D. Conway, Yoichiro Ito
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High-speed countercurrent chromatography

Nature, 1987
Support-free high-speed countercurrent liquid chromatography provides a rich domain of applications, some beyond reach of conventional liquid chromatography.
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Chiral Separations by Countercurrent Chromatography

2019
Chiral separations by countercurrent chromatography are mainly divided into two types: homogeneous chiral selector addition and interfacial chiral ligand exchange. In this chapter, we describe two methods for the enantioseparation of phenylsuccinic acid and α-hydroxy acids by high-speed countercurrent chromatography using hydroxypropyl-β-cyclodextrin ...
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Comparison of Countercurrent Chromatography with Flash Chromatography

Journal of Liquid Chromatography & Related Technologies, 1998
Abstract Studies of the separation of benzyl, phenylethyl and phenylpropyl alcohols by flash chromatography (FC) on 1.0 × 30 or 1.9 × 15 cm silica gel columns are compared with separation by countercurrent chromatography (CCC) on a 1.68 mm × 24 m, 56 mL, PTFE multilayer coil.
W. D. Conway, E. L. Bachert, A. M. Sarlo, C. W. Chan   +3 more
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Trends in countercurrent chromatography

TrAC Trends in Analytical Chemistry, 1986
Abstract Since the early 1970s countercurrent chromatography has achieved a remarkable advance and is currently yielding rapid and efficient chromatographic separations that are comparable with those obtained with preparative high-performance liquid chromatography.
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Development of High-Speed Countercurrent Chromatography

2021
The preparative capability of the multilayer coil has been demonstrated in the separation of 1 g of the DNP amino acid mixture under the optimal operational conditions determined by the preliminary studies on short coils as described above. These centrifuge schemes are equipped with a novel flow-through mechanism which entirely eliminates the need for ...
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