Listar Ciencias Exactas y Naturales por título
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Synthesis, characterization and catalytic evaluation of magnetically recoverable SrO/CoFe2O4 nanocatalyst for biodiesel production from babassu oil transesterification
(2018) [Artículo de periódico]Biodiesel production has gained a lot of attention due to its environmental benefits and production from renewable sources. Here, it is reported a magnetically recoverable catalyst of SrO immobilized on a CoFe2O4 support ... -
Synthesis, characterization and ethylene oligomerization studies of chromium complexes bearing imino-furfural ligands
(2014) [Artículo de periódico]A series of chromium(III) complexes bearing imino-furfural ligands (Cr1-Cr4) were synthesized and characterized by high-resolution mass spectrometry (HRMS). All chromium precatalysts, activated with methylaluminoxane (MAO), ... -
Synthesis, characterization and photophysical properties of ESIPT reactive triazine derivatives
(2012) [Artículo 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 5-hydroxymethylfurfural from dehydration of fructose and glucose using ionic liquids
(2014) [Artículo 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) [Artículo 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 dihydropyrimidin-2-one/thione library and cytotoxic activity against the human U138-MG and rat C6 glioma cell lines
(2011) [Artículo 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) [Artículo 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 imidazole-derived ionic liquids from monoterpenes by means of the sonogashira reaction
(2012) [Artículo 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
(2008) [Artículo de periódico] -
Synthesis of magnetic nanoparticles functionalized with histidine and nickel to immobilize His-tagged enzymes using β-galactosidase as a model
(2021) [Artículo 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 new family of thiazoline and thiazole esters and investigation of their thermal properties
(2014) [Artículo 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) [Artículo 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) [Artículo 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) [Artículo 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) [Artículo 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 ... -
Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at √sNN = 2.76 TeV
(2018) [Artículo de periódico]The correlations between event-by-event fluctuations of anisotropic flow harmonic amplitudes have been measured in Pb-Pb collisions at √ sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The results are ... -
Systems Biology-Based Analysis Indicates Global Transcriptional Impairment in Lead-Treated Human Neural Progenitor Cells
(2017) [Artículo de periódico]Lead poisoning effects are wide and include nervous system impairment, peculiarly during development, leading to neural damage. Lead interaction with calcium and zinc-containing metalloproteins broadly affects cellular ... -
Systems chemo-biology analysis of DNA damage response and cell cycle effects induced by coal exposure
(2020) [Artículo de periódico]Cell cycle alterations are among the principle hallmarks of cancer. Consequently, the study of cell cycle regulators has emerged as an important topic in cancer research, particularly in relation to environmental exposure. ... -
System-size dependence of the charged-particle pseudorapidity density at √sNN = 5.02 TeV for pp, p–Pb, and Pb–Pb collisions
(2023) [Artículo de periódico]We present the first systematic comparison of the charged-particle pseudorapidity densities for three widely different collision systems, pp, p–Pb, and Pb–Pb, at the top energy of the Large Hadron Collider ( √sNN = 5.02 ... -
Systems of exchange values as tools for multi-agent organizations
(2005) [Artículo de periódico]This paper introduces systems of exchange values as tools for the organization of multi-agent systems. Systems of exchange values are defined on the basis of the theory of social exchanges, developed by Piaget and Homans. ...