| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Aseyev, Vladimir O.
University of Helsinki
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Clay Composites by In Situ Polymerization of Ionic Liquid-Based Dispersions
- 2023Amphoteric nano- and microgels with acrylamide backbone for potential application in oil recoverycitations
- 2023Clay Composites by In Situ Polymerization of Ionic Liquid-Based Dispersions
- 2022Well-dispersed clay in photopolymerized poly(ionic liquid) matrixcitations
- 2022Ophthalmic drug delivery system based on the complex of gellan and ofloxacincitations
- 2021Synthesis and characterization of novel thermo- and salt-sensitive amphoteric terpolymers based on acrylamide derivativescitations
- 2020Think Beyond the Corecitations
- 2016AuNP-Polymeric Ionic Liquid Composite Multicatalytic Nanoreactors for One-Pot Cascade Reactionscitations
- 2016Water-Dispersible Silica-Polyelectrolyte Nanocomposites Prepared via Acid-Triggered Polycondensation of Silicic Acid and Directed by Polycationscitations
- 2011Polyelectrolyte Brushes Grafted from Cellulose Nanocrystals Using Cu-Mediated Surface-Initiated Controlled Radical Polymerization.citations
- 2009Sorption of silicic acid from non-saturated aqueous solution by a complex of zinc ions with poly(vinylamine)citations
- 2004Complexation of DNA with Poly(methacryl oxyethyl trimethylammonium chloride) and Its Poly(oxyethylene) Grafted Analogue.citations
Places of action
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article
Sorption of silicic acid from non-saturated aqueous solution by a complex of zinc ions with poly(vinylamine)
Abstract
"Silicifying organisms (diatom algae, sponges, etc.) build multifarious silica and composite nano-structures which attracts rapt attention of specialists in nanotechnology. These organisms can capture monomeric silicic acid from diluted solutions (<1 mM) and molecular mechanism of this process is still unknown. Some hypotheses include mediatorial role of zinc ions coordinated with a special protein transporter. We have studied several basic hydrogels and their complexes with double charged metal ions in sorption of silicic acid from non-saturated solutions. Cross-linked poly(vinylamine) coordinated with Zn2+ was able to capture silicic acid from 0.1 to 1.7 mM solutions. The other ions (Cu2+, Fe2+, Ni2+, Co2+, Cd2+ and Mn2+) and less basic poly(1-vinylimiazole) were not active in the sorption. A mechanism included oligomerization of silicic acid and formation of triple complex poly(vinylamine)-Zn2+-oligosiloxane was proposed. FTIR. NMR and EDS data confirm this conclusion. The found capture of silicic acid from diluted solutions with polyamine-zinc complex shows possibility in principle of the zinc-mediated transmembrane transport of Si(OH)(4) in silicifying organisms. On the other hand, the ability of zinc ions immobilized on the polyamine support to capture oligosilicates could be used in directed assembly of nanocomposite structures by the ""bottom-up"" approaches. (C) 2009 Elsevier Ltd. All rights reserved."