Results 21 to 30 of about 21,538,884 (190)

Acetoacetates Derived From Vegetable Oils: A Platform for Tailor‐Made Vinylogous Urethane Foams

open access: yesAdvanced Functional Materials, EarlyView.
A renewable vegetable oil is converted into acetoacetate‐functionalized precursors for the preparation of catalyst‐free vinylogous urethane foams. Room‐temperature foaming with n‐pentane generates lightweight cellular materials, while the choice of amine enables control over foam structure and mechanical properties.
Krzysztof Polaczek   +8 more
wiley   +1 more source

Hydrophobic MFI‐Type Zeolites via Alkali‐Cation‐Induced Defect Healing: Implications for Adsorbent and Catalyst Design

open access: yesAdvanced Materials, EarlyView.
Sub‐stoichiometric amounts of Na+ or K+ enhance defect healing during Silicalite‐1 (MFI) and TS‐1 calcination by promoting Si–O–Si annealing and healing framework vacancies. The resulting defect‐free zeolites are more hydrophobic and show improved butanol/water separation and improved activity and selectivity in the epoxidation of 1‐hexene, offering a ...
Christos Kanteler   +14 more
wiley   +1 more source

Artificial Intelligence Meets Micro/Nanorobotics

open access: yesAdvanced Materials, EarlyView.
Artificial intelligence is transforming micro‐ and nanorobots from externally controlled, task‐specific machines into adaptive, autonomous systems. Machine learning, multimodal perception, digital twins, AI‐guided materials and geometry design enhance propulsion, localization, decision‐making, whichaccelerates clinical and environmental applications ...
Fatma M. Yurtsever   +6 more
wiley   +1 more source

França: una República que dubta ... i abdica

open access: yesDictatorships & Democracies, 2019
El Front Popular, fundat com a reacció a l’agressivitat amenaçadora dels contraris a Gueuse, va relligar les aspiracions cap a una república democràtica i social.
Phryné Pigenet, Michel Pigenet
doaj   +1 more source

Isomeric Ag14 Nanoclusters With Distinct Photophysical and Nanomechanical Properties

open access: yesAdvanced Science, EarlyView.
Ligand‐shell isomerism in atomically precise Ag14 nanoclusters is demonstrated to regulate core distortion, photoluminescence, and mechanical properties. Subtle changes in phosphine ligand arrangement drive a pronounced emission shift from green to red and alter crystal rigidity, revealing a direct structure‐property correlation that offers new design ...
Vivek Yadav   +14 more
wiley   +1 more source

O ANTIGO PAÇO EPISCOPAL DE ELVAS: AS ARTES DECORATIVAS E O SEU PERCURSO NO CONTEXTO DA I REPÚBLICA

open access: yesArt is on, 2015
A criação do novo bispado de Elvas no século XVI, exigia a construção de um Paço Episcopal que servisse de residência a todos os bispos que futuramente governassem a diocese.
Nuno Cruz Grancho
doaj  

Liderança e localismo na I República brasileira

open access: yesLer História, 2010
Through an approach based on micro-analysis and focused on the study of individual paths, this essay is aimed to discuss issues related to the phenomenon of localism in the First Brazilian Republic (1889-1930).
Américo Freire
doaj   +1 more source

Bypassing Heteronuclear MRI: Metal‐Free Organosilicon Nanotracers for Background‐Free Hotspot 1H Imaging on Clinical Hardware

open access: yesAdvanced Science, EarlyView.
Organosilicon micelles enable background‐free molecular magnetic resonance imaging (MRI) while remaining fully compatible with standard proton (1H) hardware. By exploiting a spectrally silent 1H window at ∼0 ppm, the silicone nanotracer allows hotspot detection by 1H chemical‐shift imaging (CSI) without metals or heteronuclei, enabling direct overlay ...
Martin Orsagh   +4 more
wiley   +1 more source

La cuestión religiosa en la I República

open access: yesHispania Sacra, 1998
Relato cronológico de la política anticlerical de los gobiernos republicanos españoles de 1873.
Francisco Martí Gilabert
doaj   +1 more source

La I República Portuguesa y la II República Española en perspectiva de género. Estudio comparado

open access: yesEx Aequo: Revista da Associação Portuguesa de Estudos sobre as Mulheres, 2021
Las conexiones entre los procesos políticos experimentados en Portugal y en España, a lo largo de su historia contemporánea, nos han llevado a preguntarnos si tales similitudes se producirían también entre la I República portuguesa y la II República ...
María de la Paz Pando Ballesteros
doaj   +1 more source

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