Results 31 to 40 of about 1,008 (176)

Théorie de la circonvolution : le corpus comme un dispositif

open access: yesNouvelle Revue Synergies Canada, 2022
L’enjeu de cet article, dans un premier temps, est d’esquisser les contours théoriques de la notion de circonvolution telle qu’elle est conçue dans ce numéro.
Daniel Vaillancourt
doaj   +1 more source

Mechanochemical Upcycling of Polyvinylidene Fluoride: Lewis Acid Induced Generation of Sodium Aluminium Fluorides

open access: yesChemSusChem, Volume 19, Issue 12, 26 June 2026.
A solvent‐free mechanochemical process to upcycle PVDF waste into sodium aluminium fluorides, which are essential for aluminium production, was developed. By ball milling PVDF with AlCl3 and NaCl, the polymer degrades into chiolite and graphitic materials. Subsequent calcination then yields cryolite.
Minh Bui   +9 more
wiley   +1 more source

Green Ceramic Machining: Influence of the Cutting Speed and the Binder Percentage on the Y-TZP Behavior

open access: yesJournal of Manufacturing and Materials Processing, 2020
The demand for inert bioceramics is always increasing in the dental field. Yttrium oxide tetragonal zirconia polycrystals (Y-TZP) are oxide ceramics which are currently used because of their interesting mechanical properties due to a toughening ...
Anthonin Demarbaix   +4 more
doaj   +1 more source

Extralimital records of the Macaroni Penguin in East Antarctica at multiple locations during the molting season

open access: yesEcosphere, Volume 17, Issue 6, June 2026.
Abstract Macaroni Penguins (Eudyptes chrysolophus) are abundant across sub‐Antarctic islands but occur only rarely in East Antarctica. Here, we report three concurrent extralimital records of Macaroni Penguins well south of their typical distribution during the austral summer of 2023–2024.
Benjamin Viola   +4 more
wiley   +1 more source

Verstehen lehren aus gestaltpsychologischer Sicht

open access: yesBeiträge zur Lehrerinnen- und Lehrerbildung, 1989
Der Gouverneur meines Staates, Colorado, Roy Romer, stellte am 12. Januar 1989 in einer Rede über den heutigen Zustand des Staates fest, dass es nötig sei, unsere Kinder besser auszubilden.
Michael Wertheimer
doaj   +1 more source

Théâtre et exil entre le Río de la Plata et le Pacifique (1835-1855)

open access: yesAmérica, 2021
L’importance de la sphère publique habermassienne pour les jeunes romantiques du Río de la Plata et des pays voisins a reçu une attention particulière depuis quelques décennies.
Edward Blumenthal
doaj   +1 more source

Gestion participative des forêts au Burkina Faso: analyse de la mise en œuvre selon les perceptions locales

open access: yesCanadian Geographies / Géographies canadiennes, Volume 70, Issue 3, Autumn / automne 2026.
Résumé La gestion participative constitue un pilier fondamental de la politique forestière nationale du Burkina Faso. Pourtant, dans la forêt de Bontioli, sa mise en œuvre révèle un décalage persistant entre les ambitions institutionnelles et les pratiques effectives, dans un contexte marqué par de fortes pressions sur les ressources, des capacités ...
Mohamed Awalo Traoré   +1 more
wiley   +1 more source

Investigating the Reactivity and Selectivity in Nucleophilic Fluorination of Secondary Alkyl Bromides and Mesylates: Assessment of the Effect of Counterion and Bulky Alcohols

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 17, 5 May 2026.
Hydrogen bonding provided by pinacol or 2‐trifluoromethyl‐2‐propanol enhances the selectivity of nucleophilic fluorination of several secondary alkyl bromides or mesylates. Synthesis of secondary alkyl fluorides via nucleophilic substitution faces the problem of high competition with E2 processes. This competition depends on the chemical environment of
Eloah P. Ávila   +3 more
wiley   +1 more source

Easier, Safer, and Greener: Unlocking the Power of Solid Reagents in Organic Reactions by Mechanochemistry

open access: yesChemistryEurope, Volume 4, Issue 2, February 2026.
This review highlights the powerful synergy between mechanochemistry and solid reagents to replace hazardous substances traditionally used in organic synthesis. Such an approach offers a safer and more sustainable pathway for conducting organic reactions, with potential benefits in both reactivity and selectivity. The use of solid bases, acids, and gas
Adrien Gallego   +4 more
wiley   +1 more source

Puncte comune şi contradicţii între partidele politice româneşti din Bucovina (1911-1914) [PDF]

open access: yesCodrul Cosminului, 2006
La première guerre mondiale trouvait les roumains de Bucowine divisés en plan politique et partinique. Cette situation a été accentuée par les mesures du gouverneur militaire autrichien, Fischer, qui a commencé des actions brutales contre les toutes ...
Vlad Gafiţa
doaj  

Home - About - Disclaimer - Privacy