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  1. Article ; Online: Relevance of extracellular electron uptake mechanisms for electromethanogenesis applications.

    Palacios, Paola Andrea / Philips, Jo / Bentien, Anders / Kofoed, Michael Vedel Wegener

    Biotechnology advances

    2024  Volume 73, Page(s) 108369

    Abstract: Electromethanogenesis has emerged as a biological branch of Power-to-X technologies that implements methanogenic microorganisms, as an alternative to chemical Power-to-X, to convert electrical power from renewable sources, and ... ...

    Abstract Electromethanogenesis has emerged as a biological branch of Power-to-X technologies that implements methanogenic microorganisms, as an alternative to chemical Power-to-X, to convert electrical power from renewable sources, and CO
    Language English
    Publishing date 2024-04-27
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 47165-3
    ISSN 1873-1899 ; 0734-9750
    ISSN (online) 1873-1899
    ISSN 0734-9750
    DOI 10.1016/j.biotechadv.2024.108369
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3730: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  2. Article ; Online: The Selenoproteome as a Dynamic Response Mechanism to Oxidative Stress in Hydrogenotrophic Methanogenic Communities.

    Kleikamp, Hugo B C / Palacios, Paola A / Kofoed, Michael V W / Papacharalampos, Georgios / Bentien, Anders / Nielsen, Jeppe L

    Environmental science & technology

    2024  Volume 58, Issue 15, Page(s) 6637–6646

    Abstract: Methanogenesis is a critical process in the carbon cycle that is applied industrially in anaerobic digestion and biogas production. While naturally occurring in diverse environments, methanogenesis requires anaerobic and reduced conditions, although ... ...

    Abstract Methanogenesis is a critical process in the carbon cycle that is applied industrially in anaerobic digestion and biogas production. While naturally occurring in diverse environments, methanogenesis requires anaerobic and reduced conditions, although varying degrees of oxygen tolerance have been described. Microaeration is suggested as the next step to increase methane production and improve hydrolysis in digestion processes; therefore, a deeper understanding of the methanogenic response to oxygen stress is needed. To explore the drivers of oxygen tolerance in methanogenesis, two parallel enrichments were performed under the addition of H
    MeSH term(s) Methane ; Proteomics ; Selenium ; Selenocysteine/metabolism ; Euryarchaeota/metabolism ; Oxidative Stress ; Oxygen ; Anaerobiosis ; Bioreactors
    Chemical Substances Methane (OP0UW79H66) ; Selenium (H6241UJ22B) ; Selenocysteine (0CH9049VIS) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2024-04-05
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.3c07725
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Direct Measurements of Electroviscous Phenomena in Nafion Membranes.

    Østedgaard-Munck, David Nicolas / Catalano, Jacopo / Bentien, Anders

    Membranes

    2020  Volume 10, Issue 11

    Abstract: Investigation of electroviscous effects is of interest to technologies that exploit transport of ions through ion exchange membranes, charged capillaries, and porous media. When ions move through such media due to a hydrostatic pressure difference, they ... ...

    Abstract Investigation of electroviscous effects is of interest to technologies that exploit transport of ions through ion exchange membranes, charged capillaries, and porous media. When ions move through such media due to a hydrostatic pressure difference, they interact with the fixed charges, leading to an increased hydraulic resistance. Experimentally this is observed as an apparent increase in the viscosity of the solution. Electroviscous effects are present in all electrochemical membrane-based processes ranging from nanofiltration to fuel-cells and redox flow batteries. Direct measurements of electroviscous effects varying the applied ionic current through Nafion membranes have, to the best of the authors' knowledge, not yet been reported in literature. In the current study, electroviscous phenomena in different Nafion ion exchange membranes are measured directly with a method where the volume permeation is measured under constant trans-membrane pressure difference while varying the ion current density in the membrane. The direct measurement of the electroviscous effect is compared to the one calculated from the phenomenological transport equations and measured transport coefficients. Within the experimental uncertainty, there is a good agreement between the two values for all membranes tested. We report here an electroviscous effect for all Nafion membranes tested to be κH?κH-1=1.15-0.052+0.035.
    Language English
    Publishing date 2020-10-25
    Publishing country Switzerland
    Document type Journal Article
    ISSN 2077-0375
    ISSN 2077-0375
    DOI 10.3390/membranes10110304
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Steady State and Dynamic Response of Voltage-Operated Membrane Gates.

    Stedgaard-Munck, David Nicolas / Catalano, Jacopo / Bentien, Anders

    Membranes

    2019  Volume 9, Issue 3

    Abstract: An electrochemical flow cell with Nafion 212, aqueous LiI/I 2 redox solution, and carbon paper electrode was operated as an electro-osmotic gate based on the Electrokinetic Energy Conversion (EKEC) principle. The gate was operated in different modes. ( ...

    Abstract An electrochemical flow cell with Nafion 212, aqueous LiI/I 2 redox solution, and carbon paper electrode was operated as an electro-osmotic gate based on the Electrokinetic Energy Conversion (EKEC) principle. The gate was operated in different modes. (
    Language English
    Publishing date 2019-03-02
    Publishing country Switzerland
    Document type Journal Article
    ISSN 2077-0375
    ISSN 2077-0375
    DOI 10.3390/membranes9030034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Strategies for synthesis of Prussian blue analogues.

    Kjeldgaard, Solveig / Dugulan, Iulian / Mamakhel, Aref / Wagemaker, Marnix / Iversen, Bo Brummerstedt / Bentien, Anders

    Royal Society open science

    2021  Volume 8, Issue 1, Page(s) 201779

    Abstract: We report a comparison of different common synthetic strategies for preparation of Prussian blue analogues (PBA). PBA are promising as cathode material for a number of different battery types, including K-ion and Na-ion batteries with both aqueous and ... ...

    Abstract We report a comparison of different common synthetic strategies for preparation of Prussian blue analogues (PBA). PBA are promising as cathode material for a number of different battery types, including K-ion and Na-ion batteries with both aqueous and non-aqueous electrolytes. PBA exhibit a significant degree of structural variation. The structure of the PBA determines the electrochemical performance, and it is, therefore, important to understand how synthesis parameters affect the structure of the obtained product. PBA are often synthesized by co-precipitation of a metal salt and a hexacyanoferrate complex, and parameters such as concentration and oxidation state of the precursors, flow rate, temperature and additional salts can all potentially affect the structure of the product. Here, we report 12 different syntheses and compare the structure of the obtained PBA materials.
    Language English
    Publishing date 2021-01-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2787755-3
    ISSN 2054-5703
    ISSN 2054-5703
    DOI 10.1098/rsos.201779
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Differential pH as a method for increasing cell potential in organic aqueous flow batteries

    Khataee, Amirreza / Wedege, Kristina / Dražević, Emil / Bentien, Anders

    Journal of materials chemistry A. 2017 Oct. 24, v. 5, no. 41

    2017  

    Abstract: In aqueous flow batteries, high battery cell potentials close to the electrochemical window of water are paramount for high cycle efficiency, power and energy density. The standard potential of many organic redox species has a strong dependence of pH and ...

    Abstract In aqueous flow batteries, high battery cell potentials close to the electrochemical window of water are paramount for high cycle efficiency, power and energy density. The standard potential of many organic redox species has a strong dependence of pH and opens the possibility for increasing the cell potential by pH tuning. In the present work, a differential pH aqueous flow battery is demonstrated. The positive side is based on bromine operated at pH ∼ 2, while the negative side is based on anthraquinone-2,7-disulfonate disodium operated at pH ∼ 8. This results in a cell potential of 1.3 V which is a significant increase from 0.86 V when operated under acidic conditions on both sides. Furthermore, the differential pH of the flow battery is remarkably stable and shows no significant change over a period of at least 14 days (∼100 cycles). The high stability is attributed to electrochemical buffer effects of the redox solutions on each side.
    Keywords batteries ; bromine ; electrochemistry ; energy density ; pH
    Language English
    Dates of publication 2017-1024
    Size p. 21875-21882.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/c7ta04975g
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Tailored energy level alignment at MoO

    Bae, Dowon / Kanellos, Gerasimos / Wedege, Kristina / Dražević, Emil / Bentien, Anders / Smith, Wilson A

    The Journal of chemical physics

    2020  Volume 152, Issue 12, Page(s) 124710

    Abstract: ... ...

    Abstract MoO
    Language English
    Publishing date 2020-04-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/1.5136252
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 49/16: Show issues

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  8. Article ; Online: Membrane fouling monitoring by 3ω sensing.

    Jørgensen, Mads Koustrup / Paulsen, Frederikke Kildeberg / Bentien, Anders / Kjul, Astrid Ræbild / Poulsen, Maiken / Mikkelsen, Louise Mailund / Thavaneswaran, Nikitha / Hansen, Simon Abildgaard / Jensen, Pernille Krogsager / Andersen, Jacob / Østedgaard-Munck, David N / Bendtsen, Jan Dimon / Christensen, Morten Lykkegaard

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 15237

    Abstract: Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of membrane fouling can potentially be used to reduce operation cost by optimizing operational parameters and cleaning conditions. In ...

    Abstract Membrane fouling significantly reduces membrane permeability, leading to higher operational expenses. In situ monitoring of membrane fouling can potentially be used to reduce operation cost by optimizing operational parameters and cleaning conditions. In this study, a platinum wire with a diameter of 20 µm was attached to the surface of a ceramic ultrafiltration membrane, and by measuring the voltage across the wire while applying an AC current, the amplitude of the third harmonic wave, the so-called 3ω signal, was obtained. Results showed increasing 3ω signals during formation of fouling layers, which correlates directly to the hydraulic resistance of the formed fouling layer in semi-dead end filtration of polymeric core shell particles and crossflow filtration of diluted milk. This is explained by the insulating effect of the fouling layers which reduces heat convection by crossflow and the different thermal conductivity in the fouling layer compared with the feed. After membrane cleaning, the permeability and the magnitude of the 3ω signal were partly restored, showing that the 3ω method can be used to monitor the effect of cleaning. The frequency of the AC current was varied so it was possible to measure the heat conductivity in the fouling layer (high frequency) and heat convection due to cross-flow (low frequency). This may potentially be used to get information of the type of fouling (heat conductivity) and thickness of the fouling layer (AC frequency where heat conductivity becomes dominating).
    Language English
    Publishing date 2023-09-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-42337-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: The 3-Omega Method for the Measurement of Fouling Thickness, the Liquid Flow Rate, and Surface Contact.

    Clausen, Casper / Pedersen, Tim / Bentien, Anders

    Sensors (Basel, Switzerland)

    2017  Volume 17, Issue 3

    Abstract: The 3-omega method is conventionally used for the measurement of thermal conductivity in solid samples. The present work includes the experimental characterization and proof-of-concept measurements of sensor concepts, based on the 3-omega method. It is ... ...

    Abstract The 3-omega method is conventionally used for the measurement of thermal conductivity in solid samples. The present work includes the experimental characterization and proof-of-concept measurements of sensor concepts, based on the 3-omega method. It is shown that this method can be used to measure fouling layers with a thickness of 10 to 400 μm, to conduct the measurement of flow rates with a high precision, and finally, as a simple on-off contact sensor with a fast response time.
    Language English
    Publishing date 2017-03-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s17030552
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Organic Redox Species in Aqueous Flow Batteries: Redox Potentials, Chemical Stability and Solubility.

    Wedege, Kristina / Dražević, Emil / Konya, Denes / Bentien, Anders

    Scientific reports

    2016  Volume 6, Page(s) 39101

    Abstract: Organic molecules are currently investigated as redox species for aqueous low-cost redox flow batteries (RFBs). The envisioned features of using organic redox species are low cost and increased flexibility with respect to tailoring redox potential and ... ...

    Abstract Organic molecules are currently investigated as redox species for aqueous low-cost redox flow batteries (RFBs). The envisioned features of using organic redox species are low cost and increased flexibility with respect to tailoring redox potential and solubility from molecular engineering of side groups on the organic redox-active species. In this paper 33, mainly quinone-based, compounds are studied experimentially in terms of pH dependent redox potential, solubility and stability, combined with single cell battery RFB tests on selected redox pairs. Data shows that both the solubility and redox potential are determined by the position of the side groups and only to a small extent by the number of side groups. Additionally, the chemical stability and possible degradation mechanisms leading to capacity loss over time are discussed. The main challenge for the development of all-organic RFBs is to identify a redox pair for the positive side with sufficiently high stability and redox potential that enables battery cell potentials above 1 V.
    Language English
    Publishing date 2016-12-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/srep39101
    Database MEDical Literature Analysis and Retrieval System OnLINE

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