Results 11 to 20 of about 974,689 (293)

PREPARATIVE SEPARATION OF ISOQUINOLINE ALKALOIDS FROM PHELLODENDRI CORTEX BY PH-ZONE-REFINING COUNTER-CURRENT CHROMATOGRAPHY

open access: yesQuímica Nova, 2018
pH-Zone-refining counter-current chromatography (PZRCCC) was successfully used for preparative separation isoquinoline alkaloids from Phellodendri Cortex.
Daijie Wang   +7 more
doaj   +3 more sources

Separation of organochlorsilanes by preparative gas chromatography

open access: yesТонкие химические технологии, 2013
The preparative gas chromatography method has been used for isolation and analysis of the organochlorsilanes isomers. The reaction of the organochlorsilanes with vapour of the water in the air has been studied.
G. N. Turkeltaub, E. A. Chernyshev
doaj   +1 more source

Fixed-bed and simulated moving bed chromatography using achiral and chiral adsorbents for the complete preparative separation of a quaternary mixture [PDF]

open access: yes, 2022
Nadolol is a nonselective beta-adrenergic receptor antagonist (beta-blocker) pharmaceutical drug, widely used in the treatment of cardiovascular diseases, such as hypertension, ischemic heart disease (angina pectoris), congestive heart failure and ...
Pais, Luís S.   +3 more
core   +3 more sources

Separation of Molar Weight-Distributed Polyethylene Glycols by Reversed-Phase Chromatography—II. Preparative Isolation of Pure Single Homologs [PDF]

open access: yes, 2023
The isolation of single homologs of polyethylene glycol by preparative reversed-phase chromatography is investigated. A thermodynamic model developed accurately previously describes the retention times of individual homologs as function of their size ...
Bornschein, Benedikt   +7 more
core   +1 more source

Complete separation of the quaternary mixture of nadolol stereoisomers using preparative and simulated moving bed chromatography [PDF]

open access: yes, 2021
The separation and purification of high added value products by liquid chromatography is a very popular technique. The development of more stable and efficient stationary phases, together with the design of innovative and more flexible separation ...
Pais, Luís S.   +3 more
core   +1 more source

Evaluation of Inter-Apparatus Separation Method Transferability in Countercurrent Chromatography and Centrifugal Partition Chromatography

open access: yesSeparations, 2019
In the countercurrent chromatography and centrifugal partition chromatography, separation method transfer and scale-up is often described as an easy and straightforward procedure.
Simon Roehrer, Mirjana Minceva
doaj   +1 more source

Optimization of Automatic Synthesis and Separation of [18F] AV-45 and Quality Control

open access: yesFrontiers in Chemistry, 2022
Objective: Based on the Tracerlab FXF-N platform, a synthesis program and preparative high-performance liquid chromatography (HPLC) purification program edited by us can stably and repeatedly produce [18F] AV-45 without changing the process. The [18F] AV-
Qi-Zhou Zhang   +5 more
doaj   +1 more source

Separation and Identification of Antioxidants and Aldose Reductase Inhibitors in Lepechinia meyenii (Walp.) Epling

open access: yesPlants, 2021
We previously reported that Lepechinia meyenii (Walp.) Epling has antioxidant and aldose reductase (AR) inhibitory activities. In this study, L. meyenii was extracted in a 50% MeOH and CH2Cl2/MeOH system.
Guanglei Zuo   +7 more
doaj   +1 more source

Absolute Configuration of Bromofluoroiodomethane after Preparative Gas Chromatographic Separation [PDF]

open access: yes, 2021
The enantiomers of bromofluoroiodomethane (CHBrFI) were separated on a preparative scale using gas chromatography (GC). The collected single enantiomers were analysed by vibrational circular dichroism spectroscopy and polarimetry in combination with ab ...
Benjamin, Spenger   +3 more
core   +1 more source

Preparative-scale isoelectric trapping separations in a multicompartmental electrolyzer: implementation and monitoring [PDF]

open access: yes, 2009
Preparative-scale protein separations have always been critical to the advancement of the life sciences. Among preparative-scale separation techniques, isoelectric trapping (IET) promises efficient separations and high production rates.
Sinajon, Joseph Brian Montejo
core   +3 more sources

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