Results 241 to 250 of about 31,646 (297)

Preparation and separation of epothilones with anticancer activity

Chemical Biology & Drug Design, 2020
AbstractEpothilone is a kind of macrolide compound, which has anticancer activity and strong inhibitory effect on breast cancer and rectal cancer cells. Herein, the chemical and biological synthesis of epothilones and how to improve fermentation yield and separation methods were summarized and discussed.
Rong Long, Wenjian Yang, Gangliang Huang
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Preparative Separation of Mixtures by Mass Spectrometry

Analytical Chemistry, 2005
A specially designed mass spectrometer which allows for preparative separation of mixtures is described. This mass spectrometer allows for large ion currents, on the order of nanoamperes, to be produced by electrospray and transmitted into a high vacuum.
Philip S, Mayer, Frantisek, Turecek, Hak-No, Lee, Adi A, Scheidemann, Terry N, Olney, Frank, Schumacher, Petr, Strop, Martin, Smrcina, Marcel, Pátek, Daniel, Schirlin   +9 more
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A Chromatographic Method for the Preparative Separation of Phosphohistidines

Analytical Biochemistry, 1998
The driving force behind this new chromatographic technique was to develop a method for purifying preparative quantities of phosphohistidines in a single step that provided good resolution wit eluants that could be easily removed. The current method can provide milligram quantities of each phosphohistidine; however, the later 1H NMR analysis of the ...
P G, Besant, L, Byrne, G, Thomas, P V, Attwood   +3 more
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Two-dimensional preparative liquid chromatography system for preparative separation of minor amount components from complicated natural products

Analytica Chimica Acta, 2014
National Natural Science Foundation of China [81102333, 81072549]; Fundamental Research Funds for the Central Universities [2010121108]; Fujian Natural Science Foundation for Distinguished Young Scholars [2012J06020]An on-line comprehensive two ...
Ying-Kun Qiu, Fangfang Chen, Xia Yan
exaly   +1 more source

Separation methods for glycoprotein analysis and preparation

Journal of Chromatography B: Biomedical Sciences and Applications, 1997
Several chromatographic methods have been developed for the isolation and characterization of glycoproteins. In these methods, affinity chromatography, a single-step method, or combined use with general chromatographic methods have now become essential for the purification of many biologically important glycoproteins, including alpha1-acid glycoprotein,
S, Kishino, K, Miyazaki
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Ibuprofen Agglomerates Preparation by Phase Separation

Drug Development and Industrial Pharmacy, 1999
The compression ability and dissolution rate of ibuprofen are poor. There are many processes to optimize these properties through adapted formulations. However, it would be more satisfactory to obtain directly during the crystallization step crystalline particles that can be directly compressed and quickly dissolved.
M, Jbilou, A, Ettabia, A M, Guyot-Hermann, J C, Guyot   +3 more
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A convenient method for preparative peptide separation

Analytical Biochemistry, 1972
Abstract A chromatographic system has been developed for the separation of peptides on a preparative scale. The principle of the method is to use the peptide bond absorbance in the 200–250 nm wavelength range as the basis for the peptide detection, and therefore to use only inorganic buffers that are transparent at these low wavelengths ...
C C, Chin, F, Wold
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Study on preparation and separation of Konjac oligosaccharides

Carbohydrate Polymers, 2013
To study the preparation and separation of Konjac oligosaccharides, Konjac Glucomannan was degraded by the combination of γ-irradiation and β-mannanase, and then the degradation product was separated by ultrafiltration. To our interest, for most of Konjac oligosaccharides obtained by this method, the molecular mass was lower than 2200 Da.
Wenjie, Jian, Yuanming, Sun, Huan, Huang, Youhui, Yang, Shuhui, Peng, Bo, Xiong, Tingtiao, Pan, Zhenlin, Xu, Mingxiang, He, Jie, Pang   +9 more
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Separations of enantiomers by preparative capillary isotachophoresis

Electrophoresis, 1999
The use of capillary isotachophoresis (ITP), operating in a discontinuous fractionation mode, for preparative separations of enantiomers of chiral compounds was studied. The ITP separations were carried out in the column-coupling configuration of the separation unit provided with the preseparation column of a 1.0 mm ID and the trapping column of a 0.8 ...
D, Kaniansky, E, Simunicova, E, Olvecká, A, Ferancová   +3 more
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Preparation and separation of complexes prepared by template polymerization

Macromolecules, 1990
La polymerisation de l'acide acrylique amorcee par K 2 S 2 O 8 sur une matrice de poly(vinylpyrrolidone) en milieu aqueux donne un complexe des 2 polymeres interagissant par liaisons hydrogenes. La separation des 2 polymeres se fait avec complexe greffe.
Saeed Al-Alawi, N. A. Saeed
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