Portail HAL UHA (Université de Haute-Alsace)
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L’apprentissage transatlantique de Paul Kirchhoff : un ethnologue allemand à l’école de Malinowski et Boas
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Goal achievement in municipal strategic planning
No full textThème du congrès : « Managing with Purpose »International audienc
Elastoplastic and microstructural properties of layers and interfaces in metal-nitride multinanolayered coating using ab-initio methods and homogenized finite element model
No full textInternational audienceElastoplastic and microstructural properties of layers and interfaces in metal-nitride multinanolayered coating using ab-initio methods and homogenized finite element mode
“Egyptian Bacchanals” on the Mediterranean Sea in Three Contemporary Digital Theatre Broadcasts of Shakespeare’s Antony and Cleopatra (2.7)
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Around the World in Eight White Rot Species: Assessment of Enzymatic and Non-enzymatic Wood Decay Pathways of Worldwide Esca Complex of Diseases (ECD) Associated Basidiomycetes
No full textInternational audienceEsca Complex of Diseases (ECD) is widespread in viticultural areas worldwide, posing a serious risk to 24 modern viticulture. The role of basidiomycetes in the onset of foliar symptoms has recently been 25 reconsidered, highlighting a link between the reduction in these symptoms and the presence of 26 Fomitiporia mediterranea in vines. As several basidiomycetes have been associated with wood decay 27 in grapevine, understanding their degradation mechanisms could help unravel the role of wood 28 degradation in ECD. Thus, a collection of ECD-associated basidiomycetes, including F. capensis, F. 29 langloisii, F. polymorpha, F. australiensis, Tropicoporus texanus, Inonotus vitis, and Stereum 30 hirsutum, was examined in addition to F. mediterranea. Our study investigates the production and 31 activity of lignocellulosic enzymes (particularly class-II peroxidases and laccases), along with the low 32 molecular weight compounds (LMWC) in the secretome of these fungi, to assess their ability to 33 perform the Chelator-Mediated-Fenton (CMF) pathway. Results highlight the production of 34 ligninolytic enzymes with low production of active manganese peroxidases and a virtually total 35 absence of lignin peroxidase activity. Additionally, the study confirms that the CMF mechanism is 36 widespread among these fungi, with all LMW secretomes fulfilling the required steps of the CMF 37 mechanism. This study provides critical insights into the degradation strategies of ECD-associated 38 white rot agents, offering potential new perspectives on studying ECD symptomatology and developing 39 targeted control strategies. The findings emphasize the need to consider the CMF mechanism in the 40 context of fungal wood degradation and its potential role in ECD development
Oxidation of dihydrotetrazine triggered by near-infrared photocatalysis for photoclick chemistry
No full textInternational audienceUsing biocompatible near-infrared light to trigger click reactions offers a powerful approach for achieving spatiotemporal control in bioconjugate chemistry. This study demonstrates an 810-nm–wavelength photooxidation of dihydrotetrazine using cyanine as a photocatalyst to unlock the tetrazine function. This activation enables the inverse electron-demand Diels–Alder reaction with strained alkenes
Naturally Derived Donor‐π‐Acceptor Compounds for Efficient Long‐Wavelength LEDs/Sunlight‐Induced Polymerization and High‐Precision Multiple 3D Printing
No full textInternational audiencePhotopolymerization driven by long‐wavelength visible LEDs offers a promising approach for biocompatible, low‐energy 3D printing, minimizing light scattering and photodamage compared to conventional ultraviolet (UV) and near‐UV systems. However, the inherently slow polymerization kinetics of long‐wavelength photoinitiators (PIs) typically necessitate high light intensities, extended curing times, or excessive PI loadings, limiting their practical applications. To address these challenges, the design and synthesis of two novel donor‐π‐acceptor (D‐π‐A) PIs are reported, incorporating 2‐phenylnaphtho[2,3‐ d ]thiazole‐4,9‐dione as an electron acceptor and two naturally derived aldehydes (furfural and butyraldehyde) as electron donors. These compounds enable exceptionally rapid polymerization under blue and green light LEDs, as well as natural sunlight, even at low light intensities and minimal PI concentrations. The unprecedented curing speed and efficiency are further demonstrated through the fabrication of intricate 3D structures using three distinct printing techniques—direct laser writing (DLW), digital light processing (DLP), and liquid crystal display (LCD) printing. This work expands the frontiers of long‐wavelength photopolymerization by combining high efficiency with eco‐friendly, low‐energy activation, paving the way for advanced applications in biocompatible additive manufacturing
