scholarly journals Layer-by-Layer Assembly of Polysaccharides and 6,10-Ionene for Separation of Nitrogen-Containing Pharmaceuticals and Their Enantiorecognition by Capillary Electrophoresis

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Anna Ioutsi ◽  
Elena Shapovalova ◽  
Aleksandra Prokhorova ◽  
Oleg Shpigun
Keyword(s):  
Dextran Sulfate ◽  
Background Electrolyte ◽  
Channel Blockers ◽  
Layer By Layer ◽  
Dynamic Coating ◽  
Rapid Separation ◽  
Sample Matrix ◽  
Silica Capillaries ◽  
Modified Layer ◽  
Layer Assembly

Two silica capillaries modified layer-by-layer with 6,10-ionene and N-(3-sulfo-3-carboxy)-propionylchitosan (SCPC) and with 6,10-ionene and dextran sulfate (DS) were prepared and investigated. Dynamic coating of the capillary efficiently reduces the adsorption of the background electrolyte, sample matrix components, and analytes on its inner wall. Such coatings effect good reproducibility and sensitivity of determination. We demonstrate that separation of betablockers, calcium channel blockers, alpha-adrenergic agonists, H1-blockers, and diuretics was the most efficient and rapid separation with a capillary modified with dextran sulfate. Tetrahydrozoline, carbinoxamine, and furacilin, which are commonly employed as treatments for allergic rhinitis, were identified in human urea. Their concentrations, independently verified by HPLC, were found to be5.3±0.8,6.6±0.5, and0.9±0.2 μg mL−1, withLOD=0.07, 0.03, 0.10 μg mL−1, andLOQ=1.0, 0.8, 0.6 μg mL−1, respectively.

Enzymatic Hydrolysis of a Layer-by-Layer Assembly Prepared from Chitosan and Dextran Sulfate

2002 ◽  
Vol 35 (23) ◽  
pp. 8656-8658 ◽  
Author(s):  
Takeshi Serizawa ◽  
Miyuki Yamaguchi ◽  
Mitsuru Akashi
Keyword(s):  
Enzymatic Hydrolysis ◽  
Dextran Sulfate ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Hydrolysis Of ◽  
Layer Assembly

Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 29-35 ◽  
Author(s):  
PEDRAM FATEHI ◽  
LIYING QIAN ◽  
RATTANA KITITERAKUN ◽  
THIRASAK RIRKSOMBOON ◽  
HUINING XIAO
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polymer System ◽  
Layer By Layer ◽  
Paper Strength ◽  
Anionic Polymer ◽  
Paper Properties ◽  
Modified Chitosan ◽  
Layer By Layer Assembly ◽  
Polyelectrolyte Titration ◽  
Layer Assembly

The application of an oppositely charged dual polymer system is a promising approach to enhance paper strength. In this work, modified chitosan (MCN), a cationic polymer, and carboxymethyl cellulose (CMC), an anionic polymer, were used sequentially to improve paper strength. The adsorption of MCN on cellulose fibers was analyzed via polyelectrolyte titration. The formation of MCN/CMC complex in water and the deposition of this complex on silicon wafers were investigated by means of atomic force microscope and quasi-elastic light scattering techniques. The results showed that paper strength was enhanced slightly with a layer-by-layer assembly of the polymers. However, if the washing stage, which was required for layer-by-layer assembly, was eliminated, the MCN/CMC complex was deposited on fibers more efficiently, and the paper strength was improved more significantly. The significant improvement was attributed to the extra development of fiber bonding, confirmed further by scanning electron microscope observation of the bonding area of fibers treated with or without washing. However, the brightness of papers was somewhat decreased by the deposition of the complex on fibers. Higher paper strength also was achieved using rapid drying rather than air drying.

Stabilization of starch-based microgel-lysozyme complexes using a layer-by-layer assembly technique

2017 ◽  
Vol 214 ◽  
pp. 213-217 ◽  
Author(s):  
Bao Zhang ◽  
Yi Pan ◽  
Hanqing Chen ◽  
Tengfei Liu ◽  
Han Tao ◽  
...  
Keyword(s):  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Assembly Technique ◽  
Layer Assembly

Layer-by-layer assembly of hemoglobin and gold nanoparticles for enhancing the ability of oxygen carrying

2016 ◽  
Vol 363 ◽  
pp. 566-571 ◽  
Author(s):  
Lijun Sun ◽  
Xiaojun Liu ◽  
Qiaoling Sun ◽  
Meng Cai ◽  
Jiajing Zhou ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Layer Assembly
Sign in / Sign up

Export Citation Format

Share Document