| 1. |
- Apaydin, Dogukan H., et al.
(författare)
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Electrochemical Capture and Release of CO2 in Aqueous Electrolytes Using an Organic Semiconductor Electrode
- 2017
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Ingår i: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 9:15, s. 12919-12923
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Tidskriftsartikel (refereegranskat)abstract
- Developing efficient methods for capture and controlled release of carbon dioxide is crucial to any carbon. capture and utilization technology. Herein we present an approach using an organic. semiconductor electrode to electrochemically capture dissolved CO2 in aqueous electrolytes. The process relies on electrochemical reduction of a thin film of a naphthalene bisimide derivative, 2,7,bis (4-(2- (2-ethylhexyl)thiazol-4-yl)phenyObenzo [lmn][3,8] phenanthroline-1,3,6,8(2H,7H)-tetraone (NBIT). This molecule is specifically tailored to afford one-electron reversible and one-electron quasi-reversible reduction in aqueous conditions while, not dissolving or degrading. The reduced NBIT reacts with CO2 to form a stable aemicarbonate salt, which can be subsequently oxidized electrochemically to release CO2. The semicarbonate structure is confirmed by in situ IR spectroelectrochemistry. This process of capturing and releasing carbon dioxide can be realized in an oxygen-free environment under ambient pressure and temperature, with uptake efficiency for CO2 capture of similar to 2.3 mmol g(-1). This is on par with the best solution-phase amine chemical capture technologies available today.
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| 2. |
- Bandolin, Gunilla, et al.
(författare)
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How much for a tree? : How planning goes wild and the values of trees
- 2015
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Ingår i: Proceedings of Nordes No 6, 2015. - Stockholm : Konstfack. - 9789185549191
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Konferensbidrag (refereegranskat)abstract
- This exhibition item contains a book, “How much for a tree” and a 4 channel video installation. The book investigates a planning process in Malmö, that turns out as a disaster. A hundred year old park is destroyed. The investigation of the process is done in the form of a drama, where all the people involved get to tell their version. The question that is posed is: What are the values that are destroyed by this planning disaster? The video installation tries to give an answer to the question from the authors’ point of view. What are the values of trees? There are numerous ways of valuing trees, from biologic estimation on the value for insects and other plants, from the perspective of the property owner, from the importance for the air quality in the city, etc. For telling the values of trees from non-anthropocentric view, the trees importance for humans is not important. A non-anthropocentric view values what trees are in themselves, as far as it is possible for human beings to identify. The authors, both artists, suggest that through artistic means it is possible to touch upon and communicate the real non-anthropocentric values of trees.
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| 3. |
- Karlberg, Tobias, et al.
(författare)
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Metal Binding to Saccharomyces cerevisiae Ferrochelatase
- 2002
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Ingår i: Biochemistry. - : American Chemical Society (ACS). - 0006-2960 .- 1520-4995. ; 41:46, s. 13499-13506
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Tidskriftsartikel (refereegranskat)abstract
- Ferrochelatase is the terminal enzyme in the heme biosynthetic pathway. It catalyzes the insertion of ferrous iron into protoporphyrin IX to produce protoheme IX. The crystal structures of ferrochelatase from Saccharomyces cerevisiae in free form, in complex with Co(II), a substrate metal ion, and in complex with two inhibitors, Cd(II) and Hg(I), are presented in this work. The enzyme is a homodimer, with clear asymmetry between the monomers with regard to the porphyrin binding cleft and the mode of metal binding. The Co(II) and Cd(II) complexes reveal the metal binding site which consists of the invariant amino acids H235, E314, and S275 and solvent molecules. The shortest distance to the metal reveals that amino acid H235 is the primary metal binding residue. A second site with bound Cd(II) was found close to the surface of the molecule, approximately 14 Å from H235, with E97, H317, and E326 participating in metal coordination. It is suggested that this site corresponds to the magnesium binding site in Bacillus subtilis ferrochelatase. The latter site is also located at the surface of the molecule and thought to be involved in initial metal binding and regulation.
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| 4. |
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- 2019
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Tidskriftsartikel (refereegranskat)
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