Results 141 to 150 of about 1,064,069 (358)

Palladium Nanoparticles Dispersed in Alginate Beads as an Efficient, Eco‐friendly, and Sustainable Heteregeneous Catalyst: Testing in Carbon‐Sulfur and Carbon‐Carbon Cross‐Coupling Reactions

Asian Journal of Organic Chemistry, EarlyView.
Abstract The development of sustainable and efficient catalysts featuring palladium nanoparticles (Pd NPs) is highly sought after. In this context, sodium alginate, a natural polymer, presents a promising eco‐friendly support material for Pd NPs.
Ramesh Katla, Rakhi Katla, Daniel Rapachi, Marcos A. Gelesky, João Henrique Z. dos Santos, Gilber R. Rosa, Clarissa H. Rosa   +6 more
wiley   +1 more source

Nature of Anti‐Dissipative High‐Energy Excited States in Quaterpyridine‐Bridged Ruthenium Complexes

Angewandte Chemie, EarlyView.
Upon photoexcitation, meta‐connected quaterpyridine‐bridged Ru complexes undergo fast inter‐ligand electron transfer like typical chromophores, but unusually slow intra‐ligand electron transfer within bridge‐centered MLCT states. The energy saved was exploited for photoreductions and photooxidations with model electron donors and acceptors ...
Noémie Chantry, Agustina Cotic, Simon De Kreijger, Riccardo Di Forti, Benjamin Elias, Ludovic Troian‐Gautier, Alejandro Cadranel   +6 more
wiley   +2 more sources

Composição química da silagem de plantas de milho com e sem espigas

Boletim de Indústria Animal, 2007
A pesquisa foi realizada com o objetivo de avaliar algumas características das silagens das plantas de duas variedades de milho. Os tratamentos foram: T1 – silagem de milho variedade Cati Verde, plantas com espigas; T2 – silagem de milho variedade Cati Verde, plantas sem espigas; T3 – silagem de milho variedade Cati Verde, plantas sem espigas + 5% de ...
Josiane Aparecida de Lima, Antônio Ricardo Evangelista, Fernanda Lopes, Evaldo Ferrari Júnior, Romeu Fernandes Nardon, Ivani Pozar Otsuk, Hiromitsu Gervásio Ishikawa, João de Aguirre, Patrícia Helena Nogueira Turco, Joaquim Adelino de Azevedo Filho   +9 more
openaire   +6 more sources

Light‐Mediated Decomposition of Arylseleninic Acids in Aqueous Medium: A Green Alternative Toward Organoselenium‐Functionalized Imidazo[1,2‐a]pyridines

Asian Journal of Organic Chemistry, EarlyView.
A new protocol to prepare 2‐aryl‐3‐(arylselanyl)imidazo[1,2‐a]pyridines under blue light irradiation, using benzeneseleninic acid derivatives as selenium source, is described. The experimental design approach (DoE) was used to establish the best reaction conditions, which delivered fourteen derivatives in moderate to good yields (23%–75%) using water ...
Caroline S. Gomes, Carolina A. de Oliveira, João M. Anghinoni, Sabrina S. Ferreira, Márcio S. Silva, Filipe Penteado, Eder J. Lenardão   +6 more
wiley   +1 more source

Produção e características físico-químicas e celulares do leite oriundo de quartos mamários de vacas com e sem mastite subclínica em três diferentes fases de lactação

Boletim de Indústria Animal, 2013
O estágio de lactação e a mastite subclínica podem mudar as características do leite bovino, causando variações que acarretam conseqüências à qualidade e quantidade do produto e prejuízos à qualidade de subprodutos lácteos. Foram estudados animais entre a segunda e quinta lactações de uma propriedade leiteira produtora de leite C ...
Luiz Francisco Zafalon, Antônio Nader Filho, Luiz Augusto do Amaral, José Victor de Oliveira, Flávio Dutra de Resende   +4 more
openaire   +4 more sources

New Silver Nanosensor for Nickel Traces. Part II: Urinary Nickel Determination Associated to Smoking Addiction [PDF]

, 2012
A new fluorescence silver nanosensor assisted by surfactant has been recently synthesized and applied to ultra trace nickel determination. The methodology was validated by the standard addition method and satisfactorily applied to nickel determination in
Fernandez, Liliana Patricia, Luconi, Marta Olga, Talio, María Carolina   +2 more
core  

Synthesis of Crosslinked Biopolyesters Catalyzed by Natural Amino Acids

Asian Journal of Organic Chemistry, EarlyView.
Highly crosslinked bio‐polyesters were synthesized via the ROCOP reaction between epoxidized sunflower oil and biobased cyclic anhydrides. The resulting materials were comprehensively characterized by FT‐IR, TGA, and DSC. A cross‐linked network in the bio‐based polymers has been confirmed by dynamic mechanical analysis.
Enrique Francés‐Poveda, Abigail Montiel, Oscar A. Douglas‐Gallardo, Carmen Moya‐López, Genesys L. Mahecha, Mario E. Flores, Felipe de la Cruz‐Martínez, Francisca Werlinger, Javier Martínez, Agustín Lara‐Sánchez   +9 more
wiley   +1 more source

Shaping of a Reactive Manganese Catalyst Enables Access to Polyfunctionalized Cyclohexanes via Enantioselective C(sp3)─H Bond Oxidation of 1,3‐meso Diethers

Angewandte Chemie, EarlyView.
Structural shaping of a highly reactive chiral Mn‐oxo species translates into exceptionally enantioselective C─H oxidation catalyst of cyclohexyl 1,3‐meso diethers (up to >99% ee) leading to polyfunctionalized cyclohexanes. Abstract Chiral polyoxygenated cyclohexanes are valuable constituents of biologically relevant products.
Andrea Palone, Arnau Call, Aleria Garcia‐Roca, Josep M. Luis, Matthew S. Sigman, Massimo Bietti, Cristina Nevado, Miquel Costas   +7 more
wiley   +2 more sources

Análise quantitativa de cloreto de cádmio nas vísceras e tecidos de bovinos submetidos à castração química

Boletim de Indústria Animal, 2014
O principal objetivo do presente trabalho foi verificar o conteúdo de cádmio nas vísceras e tecidos de 21 bovinos da raça santa-gertrudis, da Estação Experimental de Zootecnia de São José do Rio Preto, em complementação aos estudos de castração química desses animais, tendo sido utilizado na fórmula o cloreto de cádmio, considerado ...
Milton Gorni, Eidiomar Angelucci
openaire   +8 more sources

Reversal of Regioselectivity in the Nucleophilic Fluorination of 1,2‐Dimesylate with Potassium Fluoride and 18‐Crown‐6

Asian Journal of Organic Chemistry, EarlyView.
An unexpected regio‐ and chemoselectivity was found for nucleophilic fluorination of a terminal vicinal dimesylate. Theoretical calculations were used to explain the origin of this effect. Abstract The control of chemoselectivity and regioselectivity in chemical reactions is a crucial area of research, focused on achieving the desired product with high
Eloah P. Ávila, Karla L. Lopes, Mauro V. de Almeida, Josefredo R. Pliego   +3 more
wiley   +1 more source