Results 41 to 50 of about 518,765 (252)

QUÍMICA - FACULTAD DE QUÍMICA

, 2003
PROGRAMA DE UNIDAD DE APRENDIZAJE DE QUÍMICA INORGÁNICA - FACULTAD DE ...
QUÍMICA
core  

Visible‐Light‐Mediated Lewis Acid‐Catalyzed Diradical Hydrogen Atom Transfer Reaction of Enamides

Advanced Science, EarlyView.
The Lewis acid catalysis was crucial for the success of the DHAT reaction of enamides by lowering the energy of the triplet excited state and modulating the reactivity of the formed diradical intermediate in a carbon‐to‐carbon 1,5‐DHAT and consequent cyclization that allows the functionalization of C(sp3)−H bonds to construct a variety of novel β ...
Yao Huang, Baoyu Yang, Xiang Zhou, Israel Fernández, Kexue Xia, Yang Xiong   +5 more
wiley   +1 more source

Pyridinium Cations Act as Charge Reservoirs in Expanded Halide Perovskite Analogs at High Pressure

Angewandte Chemie, EarlyView.
Redox‐innocent pyridinium derivatives can act as charge reservoirs in expanded tin‐iodide perovskite analogs. Material compression reduces the energy gap between the pyridinium π* acceptor orbital and the valence‐band maximum, facilitating electron transfer from the framework to the molecules and thereby significantly increasing electronic conductivity
Christina R. Deschene, Feng Ke, Kostas Fykouras, Alexander C. Su, Yu Lin, Linn Leppert, Hemamala I. Karunadasa, Roc Matheu   +7 more
wiley   +2 more sources

Influência das castrações cirúrgica e química na produção e qualidade de carne de bovinos de corte

Boletim de Indústria Animal, 2014
Em delineamento experimental Inteiramente casualizado, 21 bovinos machos da raça santa-gertrúdis, com idade inicial de trinta dias, foram distribuídos em três tratamentos e sete repetições. Os tratamentos foram: castração química, castração cirúrgica e ausência da prática. A castração química consistiu na aplicação intratesticular de
João Carlos Aguiar de Mattos, Milton Gorni, Antonio Ãlvaro Duarte de Oliveira, Paulo Gastão da Cunha, Odair O. Corte   +4 more
openaire   +5 more sources

Polymer‐Grafted Cu(II) Metal–Organic Polyhedra as Scalable, Melt‐Processable Porous Materials

Advanced Science, EarlyView.
The use of a direct synthetic route to obtain polymer‐grafted Cu(II)‐based metal–organic polyhedra gives rise to a low‐cost and scalable cage. This material combines low‐temperature melting, achieving phase changes while preserving cage integrity, and high CO2 uptake exceeding 0.6 mmol g−1.
Alba Cortés‐Martínez, Francisco Sánchez‐Férez, José A. Suárez del Pino, Sergio Royuela, Félix Zamora, Daniel Maspoch, Arnau Carné‐Sánchez   +6 more
wiley   +1 more source

Isolable C‐Phosphonio‐Boratavinyl Anion

Angewandte Chemie, EarlyView.
A persistent C‐phosphonio boratavinyl anion was successfully synthesized. This boron‐containing vinyl lithium, featuring a vinyl carbon with an excessively high negative charge, exhibits remarkable nucleophilic and basic character, which was demonstrated by the result of a rapid reaction with H2 at RT.
Huihui Xu, Aurora Rodríguez‐Álvarez, Md Jabed Hossain, Antoine Baceiredo, Eddy Maerten, Nathalie Saffon‐Merceron, Vicenç Branchadell, Tsuyoshi Kato   +7 more
wiley   +2 more sources

Relações entre as composições químicas das 9-10-11a costelas com a carcaça e o corpo vazio de tourinhos Nelore

Boletim de Indústria Animal, 2013
O artigo não apresenta resumo em português.
Luiz Henrique Olivera Silva, Sarah Figueiredo Martins Bonilha, Renata Helena Branco, Eduardo Figueiredo Martins Bonilha, Fabiana Lana de Araújo, Joslaine Noely dos Santos Gonçalves Cyrillo   +5 more
openaire   +5 more sources

Magnetoelectric BaTiO3/CoFe2O4 Thin‐Film Meshes for Neuronal Differentiation

Advanced Science, EarlyView.
We engineer an epitaxial BaTiO3/CoFe2O4 magnetoelectric mesh that overcomes boundary‐induced mechanical clamping. Progressively reducing the mechanical constraint, from substrate‐clamped to PDMS‐transferred and ultimately freestanding, enhances magnetic‐to‐electric transduction and strengthens magnetoelectric coupling.
Mathieu Mirjolet, Hao Ye, Abderrahim Lahlahi Attalhaoui, Donghoon Kim, Vitaly Pustovalov, Elric Zhang, Marc Tudela‐Pi, Bastian Gebauer, Juan Bautista Carda Castelló, Anton Guimerà‐Brunet, Josep Puigmartí‐Luis, Xiang‐Zhong Chen, Minsoo Kim, Salvador Pané   +13 more
wiley   +1 more source

Introducing Diradicaloid Thiele's Hydrocarbon Derivatives as Ligand in Transition Metal Chemistry

Angewandte Chemie, EarlyView.
N‐doped Thiele's hydrocarbon derivative is introduced as a ligand for the synthesis of mono‐ and bimetallic rhodium complexes as well as cyclometalated iridium complexes. These compounds constitute the first metal complexes based on a Thiele's hydrocarbon (or p‐quinodimethane) derivative and, to the best of our knowledge, the first cyclometalated ...
Alok Mahata, Nicolás. I. Neuman, Biprajit Sarkar   +2 more
wiley   +2 more sources

Composição físico-química de amostra de méis de Apis mellifera L. do Estado de Tocantins, Brasil

Boletim de Indústria Animal, 2013
A presente pesquisa, desenvolvida com amostras de méis de Apis mellifera coletadas diretamente dos produtores de diversos municípios do Estado de Tocantins, Brasil, teve o objetivo de verificar, com base em características físico-químicas, como se agrupam as amostras de méis.
Luís Carlos Marchini, Geni da Silva Sodré, Augusta Carolina de Camargo Carmello Moreti, Ivani Pozar Otsuk   +3 more
openaire   +4 more sources