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Mikami T, Matsumura S, Ichikawa R, Kato R, Uchida J, Nishimura T, Kato T. Bioinspired macromolecular templates for crystallographic orientation control of ZnO thin films through zinc hydroxide carbonate. Polym J 2022. [DOI: 10.1038/s41428-022-00661-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AbstractThe biomineralization-inspired preparation of inorganic hybrid materials has attracted attention. Here, we report a new approach to the orientation control of zinc oxide (ZnO) thin-film crystals through the preparation of zinc hydroxide carbonate (ZHC) by the macromolecular templates of poly(2-hydroxyethyl methacrylate) (PHEMA) and poly(vinyl alcohol) (PVA). Using 100-nm-thick PHEMA templates, ZHC thin films with the c-axis oriented parallel to the substrate were obtained, while ZHC thin films prepared by 100-nm-thick PVA templates showed perpendicular orientation. After the thermal treatment of ZHC, the crystal orientations of the ZnO thin films were maintained. The effects of the thickness and annealing time for the polymer templates on the morphologies of the ZnO thin films were examined.
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Zänker H, Heine K, Weiss S, Brendler V, Husar R, Bernhard G, Gloe K, Henle T, Barkleit A. Strong Uranium(VI) Binding onto Bovine Milk Proteins, Selected Protein Sequences, and Model Peptides. Inorg Chem 2019; 58:4173-4189. [PMID: 30860361 DOI: 10.1021/acs.inorgchem.8b03231] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hexavalent uranium is ubiquitous in the environment. In view of the chemical and radiochemical toxicity of uranium(VI), a good knowledge of its possible interactions in the environment is crucial. The aim of this work was to identify typical binding and sorption characteristics of uranium(VI) with both the pure bovine milk protein β-casein and diverse related protein mixtures (caseins, whey proteins). For comparison, selected model peptides representing the amino acid sequence 13-16 of β-casein and dephosphorylated β-casein were also studied. Complexation studies using potentiometric titration and time-resolved laser-induced fluorescence spectroscopy revealed that the phosphoryl-containing proteins form uranium(VI) complexes of higher stability than the structure-analog phosphoryl-free proteins. That is in agreement with the sorption experiments showing a significantly higher affinity of caseins toward uranium(VI) in comparison to whey proteins. On the other hand, the total sorption capacity of caseins is lower than that of whey proteins. The discussed binding behavior of milk proteins to uranium(VI) might open up interesting perspectives for sustainable techniques of uranium(VI) removal from aqueous solutions. This was further demonstrated by batch experiments on the removal of uranium(VI) from mineral water samples.
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Affiliation(s)
- Harald Zänker
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Katja Heine
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany.,Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Stephan Weiss
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Vinzenz Brendler
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Richard Husar
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Gert Bernhard
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
| | - Karsten Gloe
- Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Thomas Henle
- Faculty of Chemistry and Food Chemistry , Technische Universität Dresden , 01062 Dresden , Germany
| | - Astrid Barkleit
- Institute of Resource Ecology , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstraße 400 , 01328 Dresden , Germany
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Yamada M, Tohyama C, Yamada T. Preparation of water-insoluble and biochemically stable RNA hybrid material. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Masanori Yamada
- Department of Chemistry, Faculty of Science; Okayama University of Science; Ridaicho, Kita-ku Okayama 700-0005 Japan
| | - Chika Tohyama
- Department of Chemistry, Faculty of Science; Okayama University of Science; Ridaicho, Kita-ku Okayama 700-0005 Japan
| | - Tetsuya Yamada
- Research Faculty of Agriculture; Hokkaido University; Sapporo 060-8589 Japan
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Byambaa M, Dolgor E, Shiomori K, Suzuki Y. Removal and Recovery of Heavy Metals from Industrial Wastewater by Precipitation and Foam Separation Using Lime and Casein. ACTA ACUST UNITED AC 2017. [DOI: 10.3923/jest.2018.1.9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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