Effects of dispersants on dispersibility of titanium carbide aqueous suspension
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Keywords:
Zeta potential
Polyethylenimine
Suspension
Tetramethylammonium hydroxide
Polyelectrolyte adsorption
Protein Adsorption
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Polyethylenimine
Quantum yield
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polyethylenimine-modified mesoporous hybrid material with the polyethylenimine (PEI) containing 50 wt% was synthesized. It exhibits a high adsorption capacity of 210 mg/g-PEI.The adsorbed CO 2 could be desorbed completely from the sample at 150 oC.
Polyethylenimine
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Tetramethylammonium hydroxide
Tetramethylammonium
Ammonium hydroxide
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Abstract Polyethylenimine-containing cotton fabrics were prepared by reaction of 1-epoxyethyl-3, 4-epoxycyclohexane with cotton fabric impregnated with polyethylenimine of a moderately high molecular weight. Fabrics with a high unremovable polyethylenimine content and with a different degree of cross-linking were obtained. Adsorption of several heavy metal salts such as mercuric chloride and cupric sulfate by the fabrics was investigated. Adsorption was controlled by polyethylenimine content of the fabric, extent of cross-linking, and the pH of the solution.
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Polyethylenimine
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Existing theoretical approaches to polymer adsorption on heterogeneous surfaces are applied to the problems of polyelectrolyte and polyampholyte adsorption on randomly charged surfaces. Also, analytical estimates are developed for the critical pH at which weakly charged polyelectrolytes and globular proteins start forming soluble complexes. Below a critical salt concentration, soluble complexes form “on the wrong side” of the protein isoelectric point due to the heterogeneity of the protein surface charge distribution. The analytical estimates are consistent with experimental data on soluble complexes in mixtures of gum arabic and whey protein isolate.
Polyelectrolyte adsorption
Surface charge
Globular protein
Protein Adsorption
Charge density
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Polyelectrolyte adsorption
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Polymeric-DNA complexes (polyplexes) are constructed with multiple layers of counter-polyions as DNA/polyethylenimine/poly(acrylic acid)/polyethylenimine. The increased association of polyethylenimine achieved by the multilayer approach leads to substantial increases in expression of transgene for reporter plasmids without the need for excess free polymer typically required for non-viral gene delivery. This method of polyplex preparation provides the opportunity to improve transgene expression for gene therapy approaches to disease treatment. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2008/c0633_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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Polyethylenimine
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Dispersity
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