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Accès public à partir du 3 nov. 2019
Université de Neuchâtel

Making borders from below: the emergence of the Turkish–Iraqi Frontier, 1918–1925

Tejel Gorgas, Jordi

In: Middle Eastern Studies, 2018, vol. 54, no. 5, p. 811-826

This article proposes to re-examine the Turkish–Iraqi Frontier dispute by observing the strategies and attitudes of local populations, in particular in the border areas, between 1918 and 1925, a time when the region became a battleground of British and Turkish agents seeking to secure the loyalties of the local community leaders. The latter played a relevant role in two fundamental and...

Université de Fribourg

Heptacoordinate Co(II) catalyst for light-driven hydrogen production in fully aqueous medium

Lucarini, Fiorella ; Ruggi, Albert

In: CHIMIA International Journal for Chemistry, 2018, vol. 72, no. 4, p. 203–206

Photocatalytic hydrogen production is an appealing way to store solar energy as chemical fuel. The most studied molecular catalysts for H2 production are based on earth-abundant metals such as Ni, Co and Fe. Efforts have been recently focused on the design of Co complexes with distorted octahedral geometries induced by tetra- or pentapyridyl ligands. We synthesized a new Co(II) complex based...

Université de Fribourg

Synthesis of telechelic poly(p-benzamide)s

Alizadeh, Mahshid ; Kilbinger, Andreas F. M.

In: Macromolecules, 2018, vol. 51, no. 11, p. 4363–4369

Well-defined telechelic poly(benzamide)s were synthesized by chain-growth polycondensation of phenyl-4-amino benzoate and pentafluorophenyl-4-amino benzoate derivatives with a bifunctional initiator in the presence of LiTMP as base. The polymerization was carried out at −70 °C to prevent self-initiated polymerization. To confirm the control over molecular weight, different defined...

Université de Fribourg

Trithiocarbonate-functionalized PNiPAAm-based nanocomposites for antimicrobial properties

Tan, Milène ; Horvàth, Lenke ; Brunetto, Priscilla S. ; Fromm, Katharina M.

In: Polymers, 2018, vol. 10, no. 6, p. 665

In this study, four trithiocarbonate-functionalized PNiPAAms with different molecular weights were synthesized and used as a matrix to form composites with silver nanoparticles. Nanocomposites with several polymer-to-silver ratios P:Ag+ were prepared in order to evaluate the influence of silver loading. UV studies showed a thermoresponsive behavior of the nanocomposites with a...

Université de Fribourg

Early-stage sustainability evaluation of nanoscale cathode materials for lithium ion batteries

Hischier, Roland ; Kwon, Nam Hee ; Brog, Jean?Pierre ; Fromm, Katharina M.

In: ChemSusChem, 2018, vol. 11, no. 13, p. 2068–2076

Results of an early-stage sustainability evaluation of two development strategies for new nanoscale cathode materials for Li-ion batteries are reported: (i) a new production pathway for an existing material (LiCoO2) and (ii) a new nanomaterial (LiMnPO4). Nano-LiCoO2 was synthesized by a single-source precursor route at a low temperature with a short reaction time, which results in a smaller...

Université de Fribourg

A concept for stimulated proton transfer in 1-(phenyldiazenyl)naphthalen-2-ols

Hristova, S. ; Deneva, Vera V. ; Pittelkow, M. ; Crochet, Aurélien ; Kamounah, Fadhil S. . ; Fromm, Katharina M. ; Hansen, P. E. ; Antonov, Liudmil M.

In: Dyes and Pigments, 2018, vol. 156, p. 91–99

A series of aryl azo derivatives of naphthols (1–3) were studied by means of UV–Vis and NMR spectroscopy in different solvents as well as by quantum chemical calculations and X-ray analysis. Previous studies have shown that Sudan I (1) exists as a tautomeric mixture. The effect of the solvents is minimized by the existing intramolecular hydrogen bond. Therefore, the influence on the...

Université de Fribourg

Ag Nanoencapsulation for Antimicrobial Applications

Abram, Sarah-Luise ; Gagnon, Jacinthe ; Priebe, Magdalena ; Hérault, Nelly ; Fromm, Katharina M.

In: CHIMIA International Journal for Chemistry, 2018, vol. 72, no. 4, p. 249–252

Biomaterial-related infections remain a significant challenge in medicine. Antimicrobial materials on the basis of Ag nanoparticles represent a promising solution for this issue. Therefore several Ag-containing nanocontainers and nanorattles have been synthesized and characterized that exhibit remarkable control over the release of Ag+ as antimicrobial active species. Their biological...

Université de Fribourg

Distribution of polymer-coated gold nanoparticles in a 3D lung model and indication of apoptosis after repeated exposure

Chortarea, Savvina ; Fytianos, Kleanthis ; Rodriguez-Lorenzo, Laura ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara

In: Nanomedicine, 2018, vol. 13, no. 10, p. 1169–1185

Aim: The distribution and impact of aerosol-delivered gold nanoparticles (AuNPs) functionalized with a mixture of aminated-polyvinyl alcohol and amino-PEG ([polyvinyl alcohol/PEG]-NH2) upon repeated administration onto a 3D lung model were explored. Materials & methods: AuNPs were aerosolized and uptake and epithelial translocation was assessed by inductively coupled plasma optical-emission ...

Université de Fribourg

Biological response of an in vitro human 3D lung cell model exposed to brake wear debris varies based on brake pad formulation

Barosova, Hana ; Chortarea, Savvina ; Peikertova, Pavlina ; J. D. Clift, Martin ; Petri-Fink, Alke ; Kukutschova, Jana ; Rothen-Rutishauser, Barbara

In: Archives of Toxicology, 2018, vol. 92, no. 7, p. 2339–2351

Wear particles from automotive friction brake pads of various sizes, morphology, and chemical composition are significant contributors towards particulate matter. Knowledge concerning the potential adverse effects following inhalation exposure to brake wear debris is limited. Our aim was, therefore, to generate brake wear particles released from commercial low-metallic and non-asbestos organic...

Université de Fribourg

Synthesis of different glutathione–sulfur mustard adducts of verified and potential biomarkers

Bielmann, Andreas ; Sambiagio, Nicolas ; Wehr, Nathalie ; Gerber-Lemaire, Sandrine ; Bochet, Christian G. ; Curty, Christophe

In: RSC Advances, 2018, vol. 8, no. 42, p. 23881–23890

Sulfur Mustard (SM) is a blistering agent used as a chemical weapon. Glutathione (GSH) is involved in the β-lyase degradation pathway of SM and recently, bioadducts between SM and GSH were observed in vitro. While these bioadducts have never been isolated from in vivo tests or real poisoning with SM, they could be of interest as potential future biomarkers for the retrospective validation of...