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Mostrando ítems 11-20 de 13589
Aplicação de peneiras moleculares contendo cátions orgânicos em catálise básica
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQ, 2008-12-12)
This thesis was aimed at studying novel basic catalysts based on molecular sieves containing alkylammonium cations. The studied molecular sieves were faujasite zeolites (FAU) and mesoporous silicate (like MCM-41). The ...
Ressonância não-sincronizada em íons não-clássicos.
(Programa de Pós-Graduação em Química da UFBA, 2004)
O propósito deste trabalho é mostrar que a ressonância não-sincronizada pode representar a deslocalização das ligações sigma em carbocátions, possibilitando uma descrição dos carbocátions com ponte mais articulada com ...
Arenium cation or radical cation? An insight into the cyclodehydrogenation reaction of 2-substituted binaphthyls mediated by Lewis acids
(Royal Society of Chemistry, 2020-06)
Perylene and its derivatives are some of the most interesting chromophores in the field of molecular design. One of the most employed methodologies for their synthesis is the cyclodehydrogenation of binaphthyls mediated ...
Structural features of protic ionic liquids and their impact on pretreatment performance for 2G ethanol production
(2021-11-15)
Biomass pretreatment with protic ionic liquids (PILs) is a promising source of renewable energy and bioproducts, in which different cation/anion combinations may present different behavior towards biomass modification such ...
Preparação e propriedades de zeólitas faujasita contendo cátions amônio
(Sociedade Brasileira de Química, 2015)
Regulación de la fructosa-1,6-bisfosfatasa de riñon de cerdo por fructosa-2,6-bisfosfato y cationes monovalentes.
(Universidad de Chile., 1990)
Se estudiaron probables cambios conformacionales de la enzima, inducidos por cationes monovalentes. Los estudios de proteólisis limitada de la bisfosfatasa con tripsina.
Preparação e propriedades de zeólitas faujasita contendo cátions amônioPreparation and properties of faujasite zeolites containing ammonium cations
(Sociedade Brasileira de Química, 2015)
Cationic nanoparticles for delivery of amphotericin B: preparation, characterization and activity in vitro
(2008-05)
Abstract
Background
Particulate systems are well known to be able to deliver drugs with high efficiency and fewer adverse ...
Rationalizing the influence of α-cationic phospholes on π-catalysis
(Royal Society of Chemistry, 2021-11)
The physical factors behind the experimentally observed high activity of gold(i)-catalysts having an α-cationic phosphole as a ligand have been computationally explored. To this end, the gold(i)-catalysed hydroarylation ...
DFT study on the cycloreversion of thietane radical cations
(American Chemical Society, 2011-06)
The molecular mechanism of the cycloreversion (CR) of thietane radical cations has been analyzed in detail at the UB3LYP/6-31G* level of theory. Results have shown that the process takes place via a stepwise mechanism ...