Navegação Produção Científica por Título
Resultados 76331-76350 de 83512
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Synthesis, characterization and photophysical properties of ESIPT reactive triazine derivatives
(2012) [Artigo de periódico]Uma série de quatro compostos fotoativos derivados da triazina foi obtida a partir da substituição nucleofílica aromática no cloreto cianúrico. Os compostos foram caracterizados por espectroscopia de infravermelho (IR) e ... -
Synthesis of 2,4-disubstituted thiazole combinatorial unit on solid-phase : microwave assisted conversion of alcohol to amine monitored by ft-ir
(2005) [Artigo de periódico]Síntese em fase sólida com auxílio de radiação de microondas do tiazol 2,4-dissubstituído 3 com Resina Merrifield é descrita. As reações envolveram a conversão do grupo hidroxila em amina em cinco etapas – incluindo ... -
Synthesis of 5-hydroxymethylfurfural from dehydration of fructose and glucose using ionic liquids
(2014) [Artigo de periódico]The production of 5-hydroxymethylfurfural (HMF) from sugars dehydration is an alternative for obtaining starting materials for the production of polyesters, polyamides and polyurethanes, due to the development of the new ... -
Synthesis of alkylseleno-carbohydrates and evaluation of their antioxidant properties
(2015) [Artigo de periódico]In the present study, we describe the synthesis of alkylseleno carbohydrates with different sugar scaffolds and the evaluation of their antioxidant activity profile. A compound possessing a C8 alkyl chain presented the ... -
Synthesis of Bi2FexNbO7 films applied as a catalyst for hydrogen production using visible-light photo-electrolysis
(2019) [Artigo de periódico]The seek for feasible sustainable mobility alternatives is a major concern of the society nowadays. By its turn, the production of hydrogen represents one of the main lines of study on clean energy, since hydrogen presents ... -
Synthesis of cobalt ferrite (CoFe2O4) by combustion with different concentrations of glycine
(2019) [Artigo de periódico]Among the wide range of applications of Cobalt Ferrite (CoFe2O4), its usage for the manufacturing of modern electronic devices such as solar panels, capacitors and batteries has been studied´ lately. Hence, solar-powered ... -
Synthesis of Controllers for Continuous-Time Delay Systems with Saturating Controls via LMI's
(2000) [Artigo de periódico]The stabilization of linear continuous-time systems with time delay in the state and subject to saturating controls is addressed. Sufficient conditions obtained via a linear matrix inequality (LMI) formulation are stated ... -
Synthesis of dihydropyrimidin-2-one/thione library and cytotoxic activity against the human U138-MG and rat C6 glioma cell lines
(2011) [Artigo de periódico]Duas séries de 4-aril-3,4-diidropirimidin-2(1H)-(tio)onas incluindo monastrol (1a), foram sintetizadas por uma metodologia não agressiva ao meio ambiente baseada no uso combinado de ácido cítrico ou ácido oxálico na presença ... -
Synthesis of GaN by N ion implantation in GaAs (001)
(1995) [Artigo de periódico]Both the hexagonal and cubic GaN phases were synthesized in GaAs ~001! by 50 keV N ion implantation at 380 °C and subsequent furnace annealing at 850–950 °C for 10 min–2 h. For a fluence of 1.531017 cm22, transmission ... -
Synthesis of hydro-sodalite as a heterogeneous catalyst for reaction kinetics of soybean oil trans-esterification
(2018) [Artigo de periódico]coal fly ash as a catalyst, under reaction conditions with different temperatures and reaction times. The catalyst characterization revealed that zeolite type hydro-sodalite was synthesized and consists of mesoporous ... -
Synthesis of imidazole-derived ionic liquids from monoterpenes by means of the sonogashira reaction
(2012) [Artigo de periódico]This work reports the functionalization of monoterpenoids with 2-iodo-1-methyl-1H-imidazole using Sonogashira crosscoupling reactions. Natural monoterpenes were also modified to obtain the corresponding alkynes which were ... -
Synthesis of limonene B-amino alcohol derivatives in support of new antileishmanial therapies
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Synthesis of magnetic nanoparticles functionalized with histidine and nickel to immobilize His-tagged enzymes using β-galactosidase as a model
(2021) [Artigo de periódico]The aim of this study was to synthesize iron magnetic nanoparticles functionalized with histidine and nickel (Fe3O4-His-Ni) to be used as support materials for oriented immobilization of His-tagged recombinant enzymes of ... -
Synthesis of nanocrystalline nickel oxide powders via glycine-nitrate combustion
(2005) [Artigo de periódico]NiO is a candidate material for a variety of potential applications, for example, active optical filters, antiferromagnetic layers, coloring agents for enamel, pigments, catalysts, cathode materials for alkaline batteries ... -
Synthesis of new family of thiazoline and thiazole esters and investigation of their thermal properties
(2014) [Artigo de periódico]A new family of thiazoline and thiazole esters has been synthesized and their thermal properties are presented and discussed. Thiazoline esters were obtained by cyclization reaction from 4-substituted benzenenitrile and ... -
Synthesis of silica xerogels with high surface area using acetic acid as catalyst
(2007) [Artigo de periódico]Nesse trabalho foi estudada a influência do ácido acético na estrutura de poros e na área superficial de sílicas preparadas pelo método sol-gel. Condições experimentais de síntese, tais como temperatura de policondensação ... -
Synthesis of stimuli-sensitive copolymers by RAFT polymerization : potential candidates as drug delivery systems
(2014) [Artigo de periódico]Poly(2-(dimethylamino)ethylmethacrylate-b-methymethacrylate) (PDMAEMA-b-PMMA) poly(2- (dimethylamino)ethylmethacrylate-b-vinylcaprolactam-b-(2-(dimethylamino)ethyl methacrylate) (PDMAEMA-b-PVCL-b-PDMAEMA) and poly(vinylc ... -
Synthesis of tacrine-lophine hybrids via one-pot four component reaction and biological evaluation as acetyl- and butyrylcholinesterase inhibitors
(2013) [Artigo de periódico]A novel series of tacrine-lophine hybrids was synthesized and tested for their ability to inhibit acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) with IC50 in the nanomolar concentration scale. The key step ... -
Synthesis of the integrated spectrum of metal-rich globular clusters using the hr diagram and a stellar library
(1995) [Artigo de periódico]An average integrated spectrum of the nearlysolar metallicity globular clusters NGC 6528, NGC 6553 and NGC 6440 is synthesized in the range 3500 < λ < 9750Å with a library of stellar spectra and constraints provided by the ... -
Synthesis of WC-12wt%Co nanocomposites by high energy ball milling and their morphological characterization
(2015) [Artigo de periódico]In this work micrometric particles of WC and Co were processed by high energy ball milling in a planetary ball mill. We evaluated the phase formation and changes in microstructure of WC-12wt%Co as a result of the following ...