https://ri.ufs.br/jspui/handle/riufs/135 Mon, 06 Jul 2026 23:41:07 GMT 2026-07-06T23:41:07Z https://ri.ufs.br/jspui/handle/riufs/25228 Título: Optimization of MCM-48 synthesis using factorial design Autor(es): Nascimento, Alexsandra Rodrigues do; Medeiros, Rodolfo Luiz Bezerra de Araújo; Melo, Marcus Antonio de Freitas; Melo, Dulce Maria de Araújo; Souza, Marcelo José Barros de Abstract: O material mesoporoso MCM-48 foi sintetizado hidrotermicamente de acordo com o planejamento fatorial 22 , variando-se a temperatura e o tempo de cristalização do gel de síntese, e caracterizado através de análise por difração de raios X e adsorção de N2 . Nas condições de temperatura e tempo de cristalização utilizadas, foram obtidas áreas específicas entre 924 a 1102 m2 .g-1, volumes de poros entre 0,015 a 0,087 cm3 .g-1 e diâmetros de poros entre 3,2 a 4,0 nm. Observou-se que, para as sínteses realizadas com temperatura elevada, deve-se reduzir o tempo de cristalização para que a estrutura do material seja formada. Fri, 01 Jan 2016 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/25228 2016-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/25127 Título: Optimization of a pultrusion process using finite difference and particle swarm algorithms Autor(es): Santos, Lizandro de Sousa; Pagano, Rogério Luz; Calado, Veronica Maria de Araújo; Biscaia Junior, Evaristo Chalbaud Mon, 01 Jun 2015 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/25127 2015-06-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24773 Título: Effect of the acid treatment of montmorillonite clay in the oleic acid esterification reaction Autor(es): Nascimento, Alexsandra Rodrigues do; Alves, José Antônio Barros Leal Reis; Reis, José Antônio Barros Leal; Mel, Dulce Maria de Araújo; Souza, Marcelo José Barros de; Pedrosa, Anne Michelle Garrido Thu, 01 Jan 2015 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24773 2015-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24706 Título: Simulación del proceso de biodegradación de aguas residuales de la industria de carne mediante una red neuronal artificial perceptrón multicapa Autor(es): Santana, José Carlos Curvelo; Araújo, Sidnei Alves de; Biazus, Joana Paula Menezes; Souza, Roberto Rodrigues de Abstract: In this paper, the use of a multilayer perceptron (MLP) artificial neural network (ANN) is proposed to simulate the variation of protein concentration according to the time and also to determine the end and optimal conditions of the biodegradation process of wastewater from meat industry. To reduce the protein concentration, papains from Carica papaya latex have been used at controlled condition of pH (5 and 7) and temperature (25 and 30 °C). Results showed that a reduction of 82 to 91% of protein concentration by the action of papains for 30 to 40 h of process time. Simulations showed that the best condition of the process occurred at pH 5, 30 °C and 35 h, in which a maximum biodegradation of 91% was obtained. Thu, 01 Jan 2015 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24706 2015-01-01T00:00:00Z