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  • A Cultural History of the Avant-Gardes in the Nordic Countries 1925-50
  • 2019
  • Samlingsverk (redaktörskap) (refereegranskat)abstract
    • A Cultural History of the Avant-Garde in the Nordic Countries 1925-1950 is the first publication to deal with the avant-garde in the Nordic countries in this period. The essays cover a wide range of avant-garde manifestations: literature, visual arts, theatre, architecture and design, film, radio, body culture and magazines. It is the first major historical work to consider the Nordic avant-garde in a transnational perspective that includes all the arts and to discuss the role of the avant-garde not only within the aesthetic field but in a broader cultural and political context: the pre-war and wartime responses to international developments, the new cultural institutions, sexual politics, the impact of refugees and the new start after the war.
  • A. da Cruz, Marcia Gabriely, et al. (författare)
  • Biocoatings and additives as promising candidates for ultralow friction systems
  • 2021
  • Ingår i: Green Chemistry Letters and Reviews. - : Informa UK Limited. - 1751-8253 .- 1751-7192. ; 14:2, s. 356-379
  • Forskningsöversikt (refereegranskat)abstract
    • The achievement of frictionless systems, known as superlubricity, has become of great importance concerning energy saving and emission reduction. In parallel, the drive toward sustainability and environmental aspects has led to intense advances in the research and development of biobased materials. From the standpoint of Green Chemistry principles, this review presents a critical overview of the latest findings and future perspectives on the application of biobased materials aiming at superlubricant pursuits. The progress in the use of biomacromolecules, such as chitosan, cellulose, and lignin, as additives to lubricants or coating materials, are addressed, as well as the advances on sustainable coatings based on diamond-like carbon (DLC). Deeper investigations on the development of non-hazardous processes dedicated to the tribological properties of DLC, such as electrochemical synthesis using environment-friendly solvents to generate molecular precursors, widen the perspectives to achieve sustainable materials. Besides, the exploration of the tribochemical interactions between the DLC surface and lubricants containing biobased materials arises as a promising strategy to achieve green superlubricity as a viable and scalable process, through different pathways: by hydrogen bonds between lubricant and additives, via surface passivation of the functional groups present in these biomacromolecules or by biomimicking natural joints.
  • A. da Cruz, Márcia G., et al. (författare)
  • Electrochemical Depolymerization of Lignin in a Biomass-based Solvent
  • 2022
  • Ingår i: ChemSusChem. - : Wiley. - 1864-5631 .- 1864-564X. ; 15:15
  • Tidskriftsartikel (refereegranskat)abstract
    • Breaking down lignin into smaller units is the key to generate high value-added products. Nevertheless, dissolving this complex plant polyphenol in an environment-friendly way is often a challenge. Levulinic acid, which is formed during the hydrothermal processing of lignocellulosic biomass, has been shown to efficiently dissolve lignin. Herein, levulinic acid was evaluated as a medium for the reductive electrochemical depolymerization of the lignin macromolecule. Copper was chosen as the electrocatalyst due to the economic feasibility and low activity towards the hydrogen evolution reaction. After depolymerization, high-resolution mass spectrometry and nuclear magnetic resonance spectroscopy revealed lignin-derived monomers and dimers. A predominance of aryl ether and phenolic groups was observed. Depolymerized lignin was further evaluated as an anti-corrosion coating, revealing enhancements on the electrochemical stability of the metal. Via a simple depolymerization process of biomass waste in a biomass-based solvent, a straightforward approach to produce high value-added compounds or tailored biobased materials was demonstrated. 
  • A. da Cruz, Marcia Gabriely, et al. (författare)
  • On the product selectivity in the electrochemical reductive cleavage of 2-phenoxyacetophenone, a lignin model compound
  • 2022
  • Ingår i: Green Chemistry Letters and Reviews. - : Informa UK Limited. - 1751-8253 .- 1751-7192. ; 15:1, s. 151-159
  • Tidskriftsartikel (refereegranskat)abstract
    • Research towards the production of renewable chemicals for fuel and energy industries has found lignin valorization as key. With a high carbon content and aromaticity, a fine-tuning of the depolymerization process is required to convert lignin into valuable chemicals. In context, model compounds have been used to understand the electrocatalyzed depolymerization for mimicking the typical linkages of lignin. In this investigation, 2-phenoxyacetophenone, a model compound for lignin beta-O-4 linkage, was electro-catalytically hydrogenated (ECH) in distinct three-electrode setups: an open and a membrane cell. A deep eutectic solvent based on ethylene-glycol and choline chloride was used to pursue sustainable routes to dissolve lignin. Copper was used as electrocatalyst due to the economic feasibility and low activity towards hydrogen evolution reaction (HER), a side reaction of ECH. By varying the cell type, we demonstrate a simple ECH route for the generation of different monomers and oligomers from lignin. Gas chromatography of the products revealed a higher content of carbonyl groups in those using the membrane cell, whereas the open cell produced mostly hydroxyl-end chemicals. Aiming at high value-added products, our results disclose the cell type influence on electrochemical reductive depolymerization of lignin. This approach encompasses cheap transition metal electrodes and sustainable solvents.
  • A. da Cruz, Márcia G., et al. (författare)
  • Solvent-free synthesis of photoluminescent carbon nanoparticles from lignin-derived monomers as feedstock
  • 2023
  • Ingår i: Green Chemistry Letters and Reviews. - 1751-8253 .- 1751-7192. ; 16:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Photoluminescent carbon nanoparticles (CNPs), such as carbon dots (CDs), have attracted much attention owing to a unique set of properties, like high and tunable fluorescence. In this way, the use of carbon-rich lignin has been demonstrated to be a sustainable approach to producing a broad range of photoluminescent CNPs. However, the valorization of this complex polyphenol is limited when it comes to green and efficient ways of conversion. In addition, the existing solvothermal approaches using lignin often result in CDs with low photoluminescence, while flammable and/or toxic solvents are employed. Here, we depolymerized technical lignins, i.e. kraft and soda, through electroreductive cleavage in two different sustainable media: deep eutectic solvent and levulinic acid. After depolymerization, lignin-derived monomers were generated, with a predominance of aryl ether and phenolic groups, which were further combined with 1,2-Phenylenediamine to produce N-doped CNPs in a solvent-free approach. Photoluminescent CNPs with varied sizes were generated (5–50 nm), which presented a wide photoluminescence emission, from blue to red, depending on solvent polarity. These results demonstrate a feasible and sustainable route for the solvent-free synthesis of photoluminescent CNPs using lignin-derived monomers as carbon source, which may find applications in a wide range of fields.
  • A Lexicon of Medieval Nordic Law
  • 2019
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
    • A Lexicon of Medieval Nordic Law (LMNL) is a multilingual reference work designed to make terminology from several medieval legal texts more accessible to English-speaking audiences. It contains over 6000 Nordic headwords, more than 9000 English equivalents and approximately 13,200 cross-references. It is intended to function as a general lexicon of medieval Nordic legal terminology in use before the national laws. Where possible the editors have combined related terms in multiple languages under the same headword in order to highlight similarities throughout the Nordic region during the Middle Ages. The LMNL differs from other reference works, and in particular other lexica, by its presentation of related terms from multiple languages within a single entry in a manner similar to the Kulturhistoriskt lexikon för nordisk medeltid (KLNM). Around a quarter of the entries feature a brief text articulating how the term fits into the legal landscape. Creation of the LMNL has been made possible in large part due to a generous project grant from the Swedish Research Council (2014-2017) and the gracious cooperation of members of the ongoing Medieval Nordic Laws (MNL) project begun at the University of Aberdeen in 2009. Draft English translations supplied by them, along with a small number of published translations (see table below), form the basis of this lexicon. Additional support was provided by the Royal Swedish Academy of Letters, which supplied funding for translations and revisions of some MNL laws and for the LMNL colloquium held in Stockholm in November 2015.
  • A. Madsen, Kevin, et al. (författare)
  • Josephson effect in a Weyl SNS junction
  • 2017
  • Ingår i: Physical Review B. - 2469-9950 .- 2469-9969. ; 95:6
  • Tidskriftsartikel (refereegranskat)abstract
    • We calculate the Josephson current density j (phi) for a Weyl superconductor-normal-metal-superconductor junction for which the outer terminals are superconducting Weylmetals and the normal layer is a Weyl (semi) metal. We describe the Weyl (semi) metal using a simple model with two Weyl points. The model has broken time-reversal symmetry, but inversion symmetry is present. We calculate the Josephson current for both zero and finite temperature for the two pairing mechanisms inside the superconductors that have been proposed in the literature, zero-momentum BCS-like pairing and finite-momentum FFLO-like pairing, and assuming the short-junction limit. For both pairing types we find that the current is proportional to the normal-state junction conductivity, with a proportionality coefficient that shows quantitative differences between the two pairing mechanisms. The current for the BCS-like pairing is found to be independent of the chemical potential, whereas the current for the FFLO-like pairing is not.
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