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Evidências da eletrização de polímeros dielétricos durante a impressão 3D
(Universidade Federal de Santa Maria, 2024-01-23)
During the fused deposition (FDM) 3D printing process, several effects are observed on the deposited polymers. These effects include phase change, extrusion, voltage gradient, friction, contact between different ...
Determinação da bioacessibilidade de metais em suplementos alimentares por espectrometria de emissão óptica após protocolos in vitro
(Universidade Federal de Santa Maria, 2023-03-06)
Dietary supplements are defined as products to supplement the diet and provide essential nutrients for
the humans. They can contain vitamins, minerals, botanical products, amino acids, or any combination
of these. The ...
Emprego da microextração líquido-líquido dispersiva para extração de ferro em cerveja e determinação por espectrometria de absorção atômica com chama
(Universidade Federal de Santa Maria, 2023-03-09)
In this work, a sample preparation method based on dispersive liquid-liquid microextraction (DLLME) for the extraction and preconcentration of Fe in beer and subsequent determination by flame atomic absorption spectrometry ...
Síntese, elucidação estrutural e propriedades ópticas de 1,3,2-oxazaborininos diflúor-substituídos
(Universidade Federal de Santa Maria, 2023-08-25)
The present work presents the synthesis, spectroscopic structural characterization, microbiological and photophysical properties evaluation of new series of diflúoro-organoboro compounds, BODIPYs analogous, from β-enamino-α-keto ...
Estabelecimento de método multirresíduo de agrotóxicos em água para avaliação da potabilidade
(Universidade Federal de Santa Maria, 2024-02-26)
Water is an essential resource for life, playing a fundamental role in controlling organism temperature, dissolving essential substances, and facilitating physiological and biochemical processes such as nutrient transportation ...
Avaliação do emprego da radiação micro-ondas para a pirólise de casca de arroz e obtenção de produtos com maior valor agregado
(Universidade Federal de Santa Maria, 2024-03-28)
In the present study a microwave-assisted pyrolysis system was used for the production of bio-oil, biochar, and biogas using rice husk as raw material. A domestic microwave oven was employed, whose cavity was adapted ...