Results 251 to 260 of about 2,527,192 (329)

Preparative Separation of Enantiomers

2020
Charles M. Grill, John R. Kern, Scott R. Perrin   +2 more
openaire   +2 more sources

Efficient strategies for preparative separation of iridoid glycosides and flavonoid glycosides from Hedyotis diffusa.

Journal of Separation Science, 2023
Efficient strategies for preparative separation of iridoid glycosides and flavonoid glycosides from Hedyotis diffusa using preparative HPLC combining with appropriate pretreatment technologies were developed. Four fractions (Fr.1-1, Fr.1-2, Fr.1-3 and Fr.
Yingping Dai, Hongzhi Zhang, Xinhe Wang, Yanchun Chen, Qing Fu, Yu Jin, Xinmiao Liang   +6 more
semanticscholar   +1 more source

Unlimited recycling counter-current chromatography for the preparative separation of natural products: Naphthaquinones as examples.

Journal of Chromatography A, 2020
Recycling counter-current chromatography (CCC) has been developed and widely used in preparative separation. Due to increasingly broader peaks with longer elution times, recycling elution must be stopped before a peak overlap occurs, resulting in the ...
Jian-ming He, Jiao Huang, Wei-lin Wu, Q. Mu   +3 more
semanticscholar   +1 more source

Preparative separation of isoquinoline alkaloids from Corydalis impatiens using middle chromatogram isolated gel column coupled with positively charged reversed-phase liquid chromatography.

Journal of Separation Science, 2020
Positively charged reversed-phase liquid chromatography was employed for the efficient preparative separation of isoquinoline alkaloids from Corydalis impatiens. Ten commercially available columns were compared for isoquinoline alkaloids analysis.
Qi Wang, Wenjie Chen, Qilan Wang, Y. Tao, Ruitao Yu, Guoqing Pan, J. Dang   +6 more
semanticscholar   +1 more source

HPLC semi-preparative separation of diclazuril enantiomers and racemization in solution.

Journal of Separation Science, 2020
Diclazuril has been widely used in poultry feed for prevention and treatment of coccidiosis, and its chiral separation is rarely reported. Herein, semi-preparative separation method of diclazuril enantiomers has been developed through normal-phase HPLC ...
Zhan Huang, Dong Guo, Jun Fan, Yujing Zhong, Meiyu Zhang, Limin He, Weiguang Zhang   +6 more
semanticscholar   +1 more source

Bottom‐Up Preparation of Phase‐Separated Polymersomes

Macromolecular Bioscience, 2023
AbstractA bottom‐up approach to fabricating monodisperse, two‐component polymersomes that possess phase‐separated (“patchy”) chemical topology is presented. This approach is compared with already‐existing top‐down preparation methods for patchy polymer vesicles, such as film rehydration.
Safa Almadhi, Joe Forth, Laura Rodriguez‐Arco, Aroa Duro‐Castano, Ian Williams, Lorena Ruiz‐Pérez, Giuseppe Battaglia   +6 more
openaire   +2 more sources

Preparative chromatographic separation of enantiomers

Journal of Chromatography B: Biomedical Sciences and Applications, 1992
The potential of the chromatographic separation of enantiomers on a preparative scale as a tool for the isolation of optically pure compounds is gaining increasing recognition. This review surveys the different chiral stationary phases (CSPs) used for preparative chromatography, emphasizing the advantages and drawbacks of each.
E, Francotte, A, Junker-Buchheit
openaire   +2 more sources

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
openaire   +2 more sources