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In this study the surface of bio-based polyurethane foam was enriched with different contents of catalyst residue from the petroleum industry. The foams were prepared with different residue contents, 20, 50, and 80 wt% relative to the total mass of the polyols and were characterized by several techniques, with X-ray diffraction, X-ray fluorescence spectrometry, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, microtomography, Fourier transform infrared spectroscopy and thermogravimetric. To determine the removing process the effects of various operating parameters, pH of the solution (2–12), initial concentration of pesticides (5–50 mg L−1), contact time (15–1440 min), and amount of adsorbent (30–400 mg) were investigated in a batch adsorption technique. The specific surface area of the residue was determined by the BET method as up to 150 m2/g and mean pore diameter of 4.20 ± 0.42 nm (mesopore), which explains the excellent results of the materials in the adsorption process. The high adsorption capacity is probably due to the presence of highly concentrated catalyst residue on the foam surface. Trifluralin pesticide was removed in water using these polyurethane foams with 20.0 mg L−1 initial concentration of herbicide, 30.0 mg adsorbent mass of, 5.0 pH, and 25.0 °C temperature. The chemically prepared foams with 50 wt% residue (PURC50) have higher adsorption capacities (70%) and can be used to remove trifluralin from natural waters effectively. The efficiency of removing the herbicide increased to 83% with the use of 400.0 mg adsorbent mass. The adsorption efficiency of the pure catalyst residue reaches a maximum (95.3%). The established adsorption method was appropriate for adsorption of trifluralin in contaminated waters.

Cornstarch was processed on an extruder with glycerol and different contents of urea giving rise to samples named as SGU-0, SGU-1, SGU-5, and SGU-10. The gelatinization enthalpy ΔHgel, calculated by DSC, indicated that the mixture of glycerol and urea seems to better plasticize the starch than glycerol alone. XRD was used to identify the changes in the crystal structure of native starch after extrusion processing. XRD diffractograms indicated the presence of both residual native crystallinity and processing-induced crystallinity. The morphology observed by SEM was compatible with the presence of residual crystals and recrystallization, as suggested by XRD analysis. SAXS experiments pointed out the minute amount of B-type crystallites in the samples with urea, probably due to the hydrophilic character of urea, which contributes to starch hydration.

A EDUCAÇÃO EAD CONSOLIDA-SE CADA VEZ MAIS NO BRASIL, A MODALIDADE É PAUTADA PELO DESENVOLVIMENTO TECNOLÓGICO E REALIDADES DOS USUÁRIOS, QUE DEMANDAM POR BOAS EXPERIÊNCIAS, TANTO NOS PRODUTOS QUANTOS NOS SERVIÇOS CONSUMIDOS. NESTE CONTEXTO, A ABORDAGEM DO DESIGN EM PESQUISAS DE EDUCAÇÃO - E MAIS PRECISAMENTE DA EXPERIÊNCIA DO USUÁRIO (UX) - PODEM CONTRIBUIR NO MELHOR ENTENDIMENTO DAS NECESSIDADES, DESEJOS E MELHORIAS DAS INTERAÇÕES DOS ALUNOS COM OS AMBIENTES VIRTUAIS DE APRENDIZAGEM (AVAS), MAS TAMBÉM NA ESTRUTURAÇÃO DE CURSOS SUPERIORES, EM ESTRATÉGIAS ATIVAS JUNTO À EQUIPE PEDAGÓGICA. APLICANDO OS CONCEITOS E MÉTODOS DO DESIGN UX (EX.: PESQUISAS DE SATISFAÇÃO COM OS ALUNOS, BENCHMARKING, DENTRE OUTROS) FOI DESENVOLVIDO UM NOVO FORMATO DE INTERAÇÃO COM OS ALUNOS, AS SESSÕES DE ESTUDO, PROPOSTA PARA O NOVO CURSO DA INSTITUIÇÃO DE ENSINO SUPERIOR, COM FOCO NA EXPERIÊNCIA DOS ALUNOS, DE ACORDO COM O PROJETO DE DESIGN VOLTADO PARA A EDUCAÇÃO. AS SESSÕES DE ESTUDO PERMITIRAM O DESENVOLVIMENTO DO MATERIAL, POR PARTE DOS PROFESSORES, CONSIDERANDO ESTRATÉGIAS QUE PERMITISSEM UM MELHOR PROCESSO DE APRENDIZADO. ENTRE AS BOAS PRÁTICAS PARA PRODUÇÃO DE SESSÕES DE ESTUDO PARA O AUMENTO DA RETENÇÃO DOS ALUNOS E MELHORIA DE SUA EXPERIÊNCIA ESTÃO: O USO COMBINADO DE MÍDIAS DIVERSAS (VÍDEOS, TEXTOS, LIVROS, APRESENTAÇÕES, ATIVIDADES) E A LIMITAÇÃO DO TEMPO DE CONSUMO DO CONTEÚDO, DE FORMA QUE POSSAM SER ESTUDADOS EM PERÍODOS DETERMINADOS, VARIANDO IDEALMENTE DE 15 A 30 MIN. DESTACA-SE QUE HOUVE UMA MELHORIA DA PERCEPÇÃO DOS ALUNOS CONSIDERANDO O NOVO FORMATO DESENVOLVIDO, SOBRETUDO ATRAVÉS DA MEDIÇÃO DO NET PROMOTER SCORE (NPS), QUE APRESENTA UM SCORE 21 PONTOS MAIOR DO QUE NO MODELO ANTERIOR.