Results 301 to 310 of about 536,774 (369)

Ion Exchange in Paper Chromatography

Nature, 1953
IT has been shown by Schute that several mixtures of alkaloids can be separated by chromatography on paper using aqueous ammonia1. Because the chromatograms have the characteristics of a partition chromatogram, it is probable that the above separation is due to partition between an aqueous imbibition phase and an aqueous mobile phase.
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[24] Ion-exchange chromatography

1990
Publisher Summary This chapter introduces ion-exchange chromatography (IEC) as a method for the purification of proteins and enzymes. When proteins are to be purified by IEC, some problems arise because proteins have unique origins. Proteins are derived from biological sources and their extraction often requires the use of detergents and chaotropic ...
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Ion-Exchange Chromatography in Alcohol

Nature, 1955
IN the technique of ion-exchange chromatography, the order in which compounds are eluted from a column depends basically upon differences in their ionization constants; but other factors modify and in many instances reverse the expected order1. This is illustrated in Fig.
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Model‐Based Process Challenge of an Industrial Ion‐Exchange Chromatography Step

, 2012
The separation of one weakly and one strongly binding impurity from a therapeutic protein by ion-exchange chromatography was studied with a mechanistic model.
Karin Westerberg, E. Hansen, M. Degerman, T. B. Hansen, B. Nilsson   +4 more
semanticscholar   +1 more source

Optimal Integration of Directly Combined Hydrophobic Interaction and Ion Exchange Chromatography Purification Processes

, 2012
Hydrophobic interaction and ion exchange chromatography are basic steps in purification of fermentative biopharmaceuticals. An optimization by statistical design of experiments requires a huge amount of feed. An alternative approach is the combination of
C. Helling, C. Borrmann, J. Strube
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Ion exchange paper chromatography

Journal of Chemical Education, 1961
Describes an experiment/demonstration in ion exchange paper chromatography separating amino acids.
Alan T. Thomas, J. P. Phillips
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Advantages of ion-exchange chromatography for oligonucleotide analysis.

Bioanalysis, 2011
The rapid development of therapeutic oligonucleotides (ONs) has created a need for in-depth characterization of ONs, beyond previous requirements. The natural migration to LC-MS requires the use of chromatography with MS-compatible eluents to introduce ...
K. Cook, J. Thayer
semanticscholar   +1 more source

Ion-exchange chromatography of nitrogen compounds

Journal of Chromatography A, 1974
Abstract The review presents a systematic survey of ion-exchange methods for the analysis of nitrogen-containing compounds. The main interest is in cation-exchange separations of amines, nitrogen-containing bases and related compounds by elution with solutions of acids, buffers and salts and aqueous organic solvents and in highspeed chromatography of
Pavel Jandera, Jaroslav Churáček
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Improved chromatographic performances of glycidyl methacrylate anion-exchange monolith for fast nano-ion exchange chromatography.

Journal of Separation Science, 2011
An efficient and reproducible photopolymerized poly(glycidyl methacrylate-co-ethylene dimethacrylate) was synthesized in Teflon-coated fused-silica capillaries (100 μm id) and functionalized by reaction of triethylamine with reactive epoxy groups.
Anthony Bruchet, V. Dugas, C. Mariet, F. Goutelard, J. Randon   +4 more
semanticscholar   +1 more source

Electromodulated ion exchange chromatography

Analytical Chemistry, 1986
On montre que les proprietes de la colonne peuvent etre controlees par l'intermediaire de l'etat electrochimique de la ...
Charles R. Martin, Amiya R. Ghatak-Roy
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