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  1. Article ; Online: Bio-based matrix photocatalysts for photodegradation of antibiotics.

    Maldonado-Carmona, Nidia / Piccirillo, Giusi / Godard, Jérémy / Heuzé, Karine / Genin, Emilie / Villandier, Nicolas / Calvete, Mário J F / Leroy-Lhez, Stéphanie

    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

    2024  Volume 23, Issue 3, Page(s) 587–627

    Abstract: Antibiotics development during the last century permitted unprecedent medical advances. However, it is undeniable that there has been an abuse and misuse of antimicrobials in medicine and cosmetics, food production and food processing, in the last ... ...

    Abstract Antibiotics development during the last century permitted unprecedent medical advances. However, it is undeniable that there has been an abuse and misuse of antimicrobials in medicine and cosmetics, food production and food processing, in the last decades. The pay toll for human development and consumism is the emergence of extended antimicrobial resistance and omnipresent contamination of the biosphere. The One Health concept recognizes the interconnection of human, environmental and animal health, being impossible alter one without affecting the others. In this context, antibiotic decontamination from water-sources is of upmost importance, with new and more efficient strategies needed. In this framework, light-driven antibiotic degradation has gained interest in the last few years, strongly relying in semiconductor photocatalysts. To improve the semiconductor properties (i.e., efficiency, recovery, bandgap width, dispersibility, wavelength excitation, etc.), bio-based supporting material as photocatalysts matrices have been thoroughly studied, exploring synergetic effects as operating parameters that could improve the photodegradation of antibiotics. The present work describes some of the most relevant advances of the last 5 years on photodegradation of antibiotics and other antimicrobial molecules. It presents the conjugation of semiconductor photocatalysts to different organic scaffolds (biochar and biopolymers), then to describe hybrid systems based on g-C
    MeSH term(s) Animals ; Humans ; Anti-Bacterial Agents ; Photolysis ; Catalysis ; Anti-Infective Agents
    Chemical Substances Anti-Bacterial Agents ; Anti-Infective Agents
    Language English
    Publishing date 2024-02-24
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2072584-X
    ISSN 1474-9092 ; 1474-905X
    ISSN (online) 1474-9092
    ISSN 1474-905X
    DOI 10.1007/s43630-024-00536-3
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  2. Article: Modulation of laccase catalysed oxidations at the surface of magnetic nanoparticles

    Ren, Lu / Ji, Hongtao / Heuzé, Karine / Faure, Bruno / Genin, Emilie / Rousselot Pailley, Pierre / Tron, Thierry

    Colloids and surfaces. 2021 Oct., v. 206

    2021  

    Abstract: We explored the coupling of laccases to magnetic nanoparticles (MNPs) with different surface chemical coating. Two laccase variants offering two opposite and precise orientations of the substrate oxidation site were immobilised onto core-shell MNPs ... ...

    Abstract We explored the coupling of laccases to magnetic nanoparticles (MNPs) with different surface chemical coating. Two laccase variants offering two opposite and precise orientations of the substrate oxidation site were immobilised onto core-shell MNPs presenting either aliphatic aldehyde, aromatic aldehyde or azide functional groups at the particles surface. Oxidation capabilities of the six-resulting laccase-MNP hybrids were compared on ABTS and coniferyl alcohol. Herein, we show that the original interfaces created differ substantially in their reactivities with an amplitude from 1 to > 4 folds depending on the nature of the substrate. Taking enzyme orientation into account in the design of surface modification represents a way to introduce selectivity in laccase catalysed reactions.
    Keywords aldehydes ; azides ; catalytic activity ; coniferyl alcohol ; laccase ; magnetism ; oxidation
    Language English
    Dates of publication 2021-10
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1500523-9
    ISSN 1873-4367 ; 0927-7765
    ISSN (online) 1873-4367
    ISSN 0927-7765
    DOI 10.1016/j.colsurfb.2021.111963
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  3. Article ; Online: Optically Sensitive and Magnetically Identifiable Supraparticles as Indicators of Surface Abrasion.

    Wenderoth, Sarah / Müssig, Stephan / Prieschl, Johannes / Genin, Emilie / Heuzé, Karine / Fidler, Florian / Haddad, Daniel / Wintzheimer, Susanne / Mandel, Karl

    Nano letters

    2022  Volume 22, Issue 7, Page(s) 2762–2768

    Abstract: Identifying and ensuring the integrity of products plays an important role in today's globalized world. Miniaturized information taggants in the packaging surface are therefore required to monitor the product itself instead of applying external labels. ... ...

    Abstract Identifying and ensuring the integrity of products plays an important role in today's globalized world. Miniaturized information taggants in the packaging surface are therefore required to monitor the product itself instead of applying external labels. Ideally, multiple types of information are stored in such additives. In this work, micrometer-sized core-shell particles (supraparticles) were developed to provide material surfaces with both an identifier and a surface abrasion indication functionality. The core of the supraparticles contains iron oxide nanoparticles that allow identification of the surface with a spectral magnetic code resolved by magnetic particle spectroscopy. The fluorescent silica nanoparticles in the supraparticle shell can be abraded by mechanical stress and resolved by fluorescence spectroscopy. This provides information about the mechanical integrity of the system. The application as surfaces, that contain several types of information in one supraparticle, was demonstrated here by incorporating such bifunctional supraparticles as additives in a surface coating.
    MeSH term(s) Magnetics ; Nanoparticles/chemistry ; Physical Phenomena ; Silicon Dioxide/chemistry ; Surface Properties
    Chemical Substances Silicon Dioxide (7631-86-9)
    Language English
    Publishing date 2022-03-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.1c04773
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Modulation of laccase catalysed oxidations at the surface of magnetic nanoparticles.

    Ren, Lu / Ji, Hongtao / Heuzé, Karine / Faure, Bruno / Genin, Emilie / Rousselot Pailley, Pierre / Tron, Thierry

    Colloids and surfaces. B, Biointerfaces

    2021  Volume 206, Page(s) 111963

    Abstract: We explored the coupling of laccases to magnetic nanoparticles (MNPs) with different surface chemical coating. Two laccase variants offering two opposite and precise orientations of the substrate oxidation site were immobilised onto core-shell MNPs ... ...

    Abstract We explored the coupling of laccases to magnetic nanoparticles (MNPs) with different surface chemical coating. Two laccase variants offering two opposite and precise orientations of the substrate oxidation site were immobilised onto core-shell MNPs presenting either aliphatic aldehyde, aromatic aldehyde or azide functional groups at the particles surface. Oxidation capabilities of the six-resulting laccase-MNP hybrids were compared on ABTS and coniferyl alcohol. Herein, we show that the original interfaces created differ substantially in their reactivities with an amplitude from 1 to > 4 folds depending on the nature of the substrate. Taking enzyme orientation into account in the design of surface modification represents a way to introduce selectivity in laccase catalysed reactions.
    MeSH term(s) Catalysis ; Laccase/genetics ; Laccase/metabolism ; Magnetics ; Magnetite Nanoparticles ; Oxidation-Reduction
    Chemical Substances Magnetite Nanoparticles ; Laccase (EC 1.10.3.2)
    Language English
    Publishing date 2021-07-09
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1500523-9
    ISSN 1873-4367 ; 0927-7765
    ISSN (online) 1873-4367
    ISSN 0927-7765
    DOI 10.1016/j.colsurfb.2021.111963
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Immobilization of cryptophane derivatives onto SiO2/Au and Au substrates.

    Siurdyban, Elise / Brotin, Thierry / Heuzé, Karine / Vellutini, Luc / Buffeteau, Thierry

    Langmuir : the ACS journal of surfaces and colloids

    2014  Volume 30, Issue 49, Page(s) 14859–14867

    Abstract: The synthesis of a cryptophane molecule bearing five methoxy substituents and an alkanethiol chain, 4, as well as its subsequent grafting onto a gold surface, is reported. Immobilization of cryptophane derivatives onto silica (SiO2/Au) surfaces was also ... ...

    Abstract The synthesis of a cryptophane molecule bearing five methoxy substituents and an alkanethiol chain, 4, as well as its subsequent grafting onto a gold surface, is reported. Immobilization of cryptophane derivatives onto silica (SiO2/Au) surfaces was also performed by reacting a cryptophane molecule bearing one or six acid functions, 5 or 6, respectively, with an amino-terminated self-assembled monolayer (SAM). Polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS) was used to characterize the two types of cryptophane monolayers. Surface coverage of cryptophane monolayers was estimated by comparing the PM-IRRAS intensity of cryptophane bands with that calculated from the optical constants of pentamethoxy-cryptophane for a compact monolayer. A very efficient grafting of 4 onto a gold surface was found, with a surface coverage close to 100%. On the other hand, the reaction of mono-acid, 5, or hexa-acid, 6, cryptophanes with amino-terminated SAM was less efficient, since the surface coverage did not exceed 15%. Finally, a good surface coverage (75%) was also obtained by using a cysteamine coupling agent to modify 5 before its grafting onto a gold surface.
    Language English
    Publishing date 2014-12-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/la5039156
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  6. Article ; Online: Magnetically recoverable catalysts based on mono- or bis-(NHC) complexes of palladium for the Suzuki-Miyaura reaction in aqueous media: two NHC-Pd linkages are better than one.

    Martínez-Olid, Francisco / Andrés, Román / de Jesús, Ernesto / Flores, Juan C / Gómez-Sal, Pilar / Heuzé, Karine / Vellutini, Luc

    Dalton transactions (Cambridge, England : 2003)

    2016  Volume 45, Issue 29, Page(s) 11633–11638

    Abstract: Pre-synthesized mono- and bis(NHC) palladium complexes have been grafted onto magnetic core/shell γ-Fe2O3/silica particles and tested as catalysts in model Suzuki-Miyaura coupling reactions. The bis(NHC) immobilized complex was found to be a robust ... ...

    Abstract Pre-synthesized mono- and bis(NHC) palladium complexes have been grafted onto magnetic core/shell γ-Fe2O3/silica particles and tested as catalysts in model Suzuki-Miyaura coupling reactions. The bis(NHC) immobilized complex was found to be a robust catalyst that can operate under mild conditions in aqueous media, even for the activation of chloroarene, whereas the mono(NHC) counterpart rapidly deactivates. Moreover, it can be readily recovered by magnetic separation and reused many times, providing very high productivities, and with so low leaching of palladium that the crude products obtained contain ≤10 ppm Pd.
    Language English
    Publishing date 2016-08-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/c6dt01330a
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  7. Conference proceedings: Photoaktivierbare Nanopartikel in der Kopf-Hals-Onkologie: Effektivitätssteigerung durch Dispersionsoptimierung

    Hackenberg, Stephan / Scherzad, Agmal / Koch, Susanne / Kleinsasser, Norbert / Heuzé, Karine / Dembski, Sofia

    2016  , Page(s) 16hnod155

    Event/congress 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie; Düsseldorf; Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie; 2016
    Keywords Medizin, Gesundheit
    Publishing date 2016-03-30
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/16hnod155
    Database German Medical Science

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  8. Article ; Online: Photoaktivierbare Nanopartikel in der Kopf-Hals-Onkologie: Effektivitätssteigerung durch Dispersionsoptimierung

    Hackenberg, Stephan / Scherzad, Agmal / Koch, Susanne / Kleinsasser, Norbert / Heuzé, Karine / Dembski, Sofia

    GMS Current Posters in Otorhinolaryngology - Head and Neck Surgery

    2016  Volume 12, Page(s) 137

    Keywords Medizin, Gesundheit ; Onkologie
    Publishing date 2016-04-11
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Article ; Online
    ISSN 1865-1038
    ISSN (online) 1865-1038
    DOI 10.3205/cpo001488
    Database German Medical Science

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  9. Article ; Online: Polycarboxylate ethers

    Koch, Susanne / Keßler, Michael S. / Mandel, Karl / Dembski, Sofia / Heuzé, Karine / Hackenberg, Stephan

    The key towards non-toxic TiO2 nanoparticle stabilisation in physiological solutions

    2016  

    Abstract: S.7-14 ... Stable, non-agglomerated TiO2 nanoparticle (NP) dispersions are a crucial requirement for an accurate NP dosing in in vitro and in vivo experiments. In this study self-synthesised TiO2 NPs were stabilised in three different cell culture media ( ... ...

    Abstract S.7-14

    Stable, non-agglomerated TiO2 nanoparticle (NP) dispersions are a crucial requirement for an accurate NP dosing in in vitro and in vivo experiments. In this study self-synthesised TiO2 NPs were stabilised in three different cell culture media (DMEM, RPMI, BEGM) with the help of stabilising agents. Cell culture tested stabilisers (bovine serum albumin, fetal bovine serum) were compared to non-tested commercial products which are commonly utilized in the cement industry (Melflux® 4930 F, Melpers® 4343, Sika® ViscoCrete®-10110178). For a quantitative evaluation and comparison of the degree of stabilisation, a sedimentation study using UV absorbance spectroscopy was carried out and the agglomerate size was measured via dynamic light scattering. The cytotoxicity of the novel surfactants and stabilised NPs was examined in a head and neck squamous cell carcinoma-derived FaDu cell line and in human mesenchymal stem cells. We successfully stabilised TiO2 NPs with Melflux® 4930 F in each cell culture medium, achieving perfect stability over at least one day and agglomerate sizes of less than 100 nm, while the cytotoxicity of the NPs was not affected.

    143
    Keywords Nanopartikel ; Titandioxid (TiO2) ; Zellen ; Stabilisierung ; 541
    Subject code 571
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article: Efficient and recyclable dendritic Buchwald-type catalyst for the Suzuki reaction

    Lemo, Julietta / Heuzé, Karine / Astruc, Didier

    Chemical communications. 2007 Oct. 23, , no. 42

    2007  

    Abstract: A Buchwald-type ligand attached to a star-shape molecule was synthesized in high yield, and its catalytic properties for the Suzuki reactions are shown to be excellent (down to 50 ppm with a simple chloroarene) including recovery/re-use of this hexa ... ...

    Abstract A Buchwald-type ligand attached to a star-shape molecule was synthesized in high yield, and its catalytic properties for the Suzuki reactions are shown to be excellent (down to 50 ppm with a simple chloroarene) including recovery/re-use of this hexa ligand.
    Keywords Suzuki reaction ; catalysts ; catalytic activity ; ligands
    Language English
    Dates of publication 2007-1023
    Size p. 4351-4353.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/b710289e
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