Results 11 to 20 of about 2,630 (135)

Sustainable Synthesis, Antiproliferative and Acetylcholinesterase Inhibition of 1,4- and 1,2-Naphthoquinone Derivatives

open access: yesMolecules, 2023
This work describes the design, sustainable synthesis, evaluation of electrochemical and biological properties against HepG2 cell lines, and AChE enzymes of different substituted derivatives of 1,4- and 1,2-naphthoquinones (NQ).
Rafaela G. Cabral   +4 more
doaj   +1 more source

Áreas do conhecimento em que as universidades do Sul do Brasil possuem patentes concedidas

open access: yesEm Questão, 2019
O estudo tem como objetivo geral analisar as patentes concedidas nas universidades públicas do Sul do Brasil no que se refere às áreas do conhecimento – de onde provêm, e em quais áreas elas são classificadas de acordo com a Classificação Internacional ...
Adriana Stefani Cativelli   +2 more
doaj   +1 more source

Synthesis of polyacrylamide in aqueous solution: solubility

open access: yesOrbital: The Electronic Journal of Chemistry, 2012
The synthesis of aqueous polyacrylamide solution was evaluated for its solubility in water. The reactions were performed using the acrylamide monomer, solvent and initiator (K2S2O8), with the system under magnetic stirring and heating (60°C) for 4 hours.
Daniela T. Valente, Alcino P. de Aguiar
doaj   +1 more source

Influence of temperature on thermodynamics for binary mixtures of short aliphatic protic ionic liquids [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
Two binary mixtures of protic ionic liquids comprising formate, acetate and propionate anions and 2-hydroxyethyl ammonium, bis(2-hydroxyethyl) ammonium and tris(2-hydroxyethyl) ammonium cations have been studied in terms of volumetric and acoustic ...
Andrade Rebecca S.   +2 more
doaj   +1 more source

Retaining the specific capacitance under electrochemical stress: A pH-induced self-protection mechanism for manganese dioxide pseudocapacitive electrodes

open access: yesElectrochemistry Communications, 2023
In this study, we report the enhanced electrochemical performance of a MnO2 electrode modified with a pH-sensitive co-polymer, activated at acidic pH, and designed to counteract MnO2 degradation in aqueous aqueous pseudocapacitors.
A.C. Alves   +6 more
doaj   +1 more source

Extraction of passion fruit seed oil using supercritical CO2: a study of mass transfer and rheological property by Bayesian inference

open access: yesGrasas y Aceites, 2013
The extraction of oil from passion fruit seeds using supercritical CO2 was studied. Experimental data were obtained for extraction conducted at 15, 20 and 25 MPa; at temperatures of 40 and 50 °C with CO2 flow rates of 1.5 and 3.0 mL min–1. An increase in
R. Cardoso de Oliveira   +5 more
doaj   +1 more source

Adsorption of CO2, N2, CH4, and their mixtures on silicalite: A critical evaluation of force fields [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2020
The use of molecular simulation has been growing in the field of engineering, fueled not just by the advances in computational power but also on the availability of reliable software.
Arvelos Sarah   +3 more
doaj   +1 more source

Comparison of five bacterial strains producing siderophores with ability to chelate iron under alkaline conditions

open access: yesAMB Express, 2019
Iron deficiency is one of the main causes of chlorosis in plants, which leads to losses in field crops quality and yield. The use of synthetic chelates to prevent or correct iron-deficiency is not satisfactory mainly due to their poor biodegradability ...
Carlos M. H. Ferreira   +4 more
doaj   +1 more source

Valorization of Wastes from Wine Industry in the Production of Lightweight Clay Bricks

open access: yesU.Porto Journal of Engineering
Lightweight clay brick is an idea that arose from the need to reduce waste by giving grape pomace, a waste product from the Portuguese wine sector, a new use, promoting a circular economy.
José Matos   +3 more
doaj   +1 more source

A New Switchable Zr12 Oxocluster Based Large Pore Metal–Organic Framework Functionalized With Spin Crossover Complexes for Acetic Acid Colorimetric Sensing

open access: yesAngewandte Chemie International Edition, EarlyView.
We present here (1)⊂MIP‐216(Zr), a new hybrid material composed of an FeII spin crossover complex (1) loaded in the pores of a new hydrophobic metal–organic framework (MIP‐216(Zr), that presents a high affinity toward acetic acid and acts as a highly sensitive colorimetric sensor of acetic acid vapor due to a spin state switching of the encapsulated ...
Emmelyne Cuza   +8 more
wiley   +1 more source

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