scholarly journals Chromatographic and Membrane Separation of Enantiomers Using Polysaccharide Derivatives.

MEMBRANE ◽  
1997 ◽  
Vol 22 (3) ◽  
pp. 120-125 ◽  
Author(s):  
Eiji Yashima ◽  
Yoshio Okamoto
Keyword(s):  
Membrane Separation ◽  
Separation Of Enantiomers ◽  
Polysaccharide Derivatives

Polyurea With L-Lysinyl Residues as Components: Application to Membrane Separation of Enantiomers

2011 ◽  
Vol 212 (13) ◽  
pp. 1351-1359 ◽  
Author(s):  
Makoto Hatanaka ◽  
Yuki Nishioka ◽  
Masakazu Yoshikawa
Keyword(s):  
Membrane Separation ◽  
Separation Of Enantiomers

Polysaccharide derivatives as useful chiral stationary phases in high-performance liquid chromatography

2007 ◽  
Vol 79 (9) ◽  
pp. 1561-1573 ◽  
Author(s):  
Xiaoming Chen ◽  
Chiyo Yamamoto ◽  
Yoshio Okamoto
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Silica Gel ◽  
Chromatographic Separation ◽  
High Performance ◽  
Stationary Phases ◽  
Chiral Stationary Phases ◽  
Separation Of Enantiomers ◽  
Polysaccharide Derivatives ◽  
New Generation

The chromatographic separation of enantiomers using chiral stationary phases (CSPs) has significantly advanced. The esters and carbamates of polysaccharides coated on silica gel have been extensively studied and widely used as CSPs for high-performance liquid chromatography (HPLC). In order to overcome the strict solvent limitation on these coated CSPs, the preparation of a new generation of CSPs consisting of immobilized polysaccharide derivatives has become increasingly important. The universal solvent compatibility of the new CSPs provides flexibility in both analytical and preparative chromatographies.

Synthesis of cationic polysaccharide derivatives and their hypocholesterolaemic capacity

2002 ◽  
Vol 35 (3) ◽  
pp. 181 ◽  
Author(s):  
Jung Kul Lee ◽  
Sang Yong Kim ◽  
Soo Un Kim ◽  
Jung Hoe Kim
Keyword(s):  
Polysaccharide Derivatives

Research Trends of Carbon Dioxide Capture using Ionic Liquids and Aqueous Amine-Ionic Liquids Mixtures

2016 ◽  
Vol 13 (1) ◽  
pp. 53
Author(s):  
Siti Nabihah Jamaludin ◽  
Ruzitah Mohd Salleh
Keyword(s):  
Ionic Liquids ◽  
Co2 Capture ◽  
Membrane Separation ◽  
Carbon Dioxide Capture ◽  
Global Climate ◽  
Research Trends ◽  
Co2 Absorption ◽  
Absorption Process ◽  
Chemical Absorption ◽  
Factors Influencing

Anthropogenic CO2 emissions has led to global climate change and widely contributed to global warming since its concentration has been increasing over time. It has attracted vast attention worldwide. Currently, the different CO2 capture technologies available include absorption, solid adsorption and membrane separation. Chemical absorption technology is regarded as the most mature technology and is commercially used in the industry. However, the key challenge is to find the most efficient solvent in capturing CO2. This paper reviews several types of CO2 capture technologies and the various factors influencing the CO2 absorption process, resulting in the development of a novel solvent for CO2 capture.

Experimental Studies Concerning the Semipermeable Membrane Separation Efficiency for 134Cs, 137Cs, 57Co, 58Co, 60Co, 54Mn in Liquid Radioactive Waste I. Treatment of secondary waste from POD decontamination procedure

2008 ◽  
Vol 59 (5) ◽  
Author(s):  
Mirela Dulama ◽  
Nicoleta Deneanu ◽  
Cristian Dulama ◽  
Margarit Pavelescu
Keyword(s):  
Membrane Separation ◽  
Separation Efficiency ◽  
Liquid Radioactive Waste ◽  
Experimental Studies ◽  
Experimental Tests ◽  
Suspended Solid ◽  
Process Efficiency ◽  
Active Charcoal ◽  
Precipitation Process ◽  
Pre Treatment

The paper presents the experimental tests concerning the treatment by membrane techniques of radioactive aqueous waste. Solutions, which have been treated by using the bench-scale installation, were radioactive simulated secondary wastes from the decontamination process with modified POD. Generally, an increasing of the retention is observed for most of the contaminants in the reverse osmosis experiments with pre-treatment steps. The main reason for taking a chemical treatment approach was to selectively remove soluble contaminants from the waste. In the optimization part of the precipitation step, several precipitation processes were compared. Based on this comparison, mixed [Fe(CN)6]4-/Al3+/Fe2+ was selected as a precipitation process applicable for precipitation of radionuclides and flocculation of suspended solid. Increased efficiencies for cesium radionuclides removal were obtained in natural zeolite adsorption pre-treatment stages and this was due to the fact that volcanic tuff used has a special affinity for this element. Usually, the addition of powdered active charcoal serves as an advanced purifying method used to remove organic compounds and residual radionuclides; thus by analyzing the experimental data (for POD wastes) one can observe a decreasing of about 50% for cobalt isotopes subsequently to the active charcoal adsorption.. The semipermeable membranes were used, which were prepared by the researchers from the Research Center for Macromolecular Materials and Membranes, Bucharest. The process efficiency was monitored by gamma spectrometry.

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