Results 11 to 20 of about 18,310 (180)

Alterações na composição físico-química de pinhões (Araucaria angustifolia) armazenados em diferentes embalagens e ambientes

Pesquisa Florestal Brasileira, 2023
O pinhão é um alimento de grande importância econômica e gastronômica no Brasil, mas com dificuldade de conservação pós-colheita. No presente estudo avaliou-se as características dos pinhões armazenados no ambiente doméstico, utilizando-se embalagens de
Fernanda Janaína Oliveira Gomes da Costa, Rossana Catie Bueno de Godoy, Carolina Lopes Leivas, Leticia Oelke Pereira, Nina Waszczynskyj   +4 more
doaj   +1 more source

Synthesis of polyacrylamide in aqueous solution: solubility

Orbital: 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

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

Em 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 , William Barbosa Vianna, Adilson Luiz Pinto   +2 more
doaj   +1 more source

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

Journal 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., Carreras Alberto, Iglesias Miguel   +2 more
doaj   +1 more source

Readequação da prática de laboratório de engenharia química: projeto de um sedimentador [PDF]

, 2022
Pesquisa sem auxílio de agências de fomentoTrabalho de Conclusão de Curso (Graduação)O objetivo deste trabalho é a readequação da prática da disciplina Laboratório de Engenharia Química II, denominada sedimentação, através da implementação de uma ...
Silva, Patrik Ferreira
core  

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

Electrochemistry 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, Luisa Chiavassa, Tiago D. Martins, Maryna Taryba, Carlos Baleizão, Teresa M. Silva, M.F. Montemor   +6 more
doaj   +1 more source

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

Chemical 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, Diógenes Thalles Senna, Hori Eponina Carla, Lobato Romanielo Lucienne   +3 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

Grasas 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, R. M. Rossi, M. L. Gimenes, S. Jagadevan, W. Machado Giufrida, S. T. Davantel de Barros   +5 more
doaj   +1 more source

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

AMB 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, Ângela Vilas-Boas, Cátia A. Sousa, Helena M. V. M. Soares, Eduardo V. Soares   +4 more
doaj   +1 more source

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

U.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, André Cruz, Luís Marques, Rui Pereira   +3 more
doaj   +1 more source