Encontrados 42 documentos, a visualizar página 1 de 5
Distúrbios alimentares
Silva, Bruna Loureiro Oliveira de Sousa eTrabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária ; Os distúrbios alimentares traduzem-se em comportamentos, quer pela falta, quer pelo excesso da ingestão de alimentos O crescente aumento destes distúrbios, nomeadamente a obsessão pelos corpos magros, relaciona-se com o impacto que os media tem na sociedade, uma vez que a magreza...
Evaluation of ion exchange-modified Y and ZSM5 zeolites in Cr(VI) biosorption a...
Silva, Bruna; Figueiredo, Hugo; Soares, O. S. G. P.; Pereira, M. F. R.; Figueiredo, J. L.; Lewandowska, A. E.; Bañares, M. A.; Bañares, M. A.The aim of this work was the evaluation of the performance of two zeolites with different structures (FAU and MFI) and acidity properties in the biosorption of Cr(VI) and catalytic oxidation of ethyl acetate. The starting zeolites, Y (FAU) and ZSM5 (MFI), were modified by ion exchange treatments with NaNO3 in order to obtain zeolites with different acidity and sodium content. A biosorption system consisting of ...
Improved biosorption for Cr(VI) reduction and removal by Arthrobacter viscosus ...
Silva, Bruna; Figueiredo, Hugo; Quintelas, C.; Neves, Isabel C.; Tavares, T.The aim of the present work was to optimize the reduction and removal of chromium from aqueous solutions by a biosorption system consisting of a bacteria supported on a zeolite. The system proposed combines the biosorption properties of Arthrobacter viscosus, with the ion exchange capacity of NaY zeolite. Experiments were also performed without the zeolite for comparison purposes. Experimental parameters such a...
Evaluation of ion exchange-modified Y and ZSM5 zeolites in Cr(VI) biosorption a...
Silva, Bruna; Figueiredo, Hugo; Soares, O. S. G. P.; Pereira, M. F. R.; Figueiredo, J. L.; Lewandowska, A. E.; Bañares, M. A.; Neves, Isabel C.The aim of this work is the evaluation of the performance of two zeolites with different structures (FAU and MFI) and acidity properties in the biosorption of Cr(VI) and catalytic oxidation of ethyl acetate. The starting zeolites, Y (FAU) and ZSM5 (MFI), were modified by ion exchange treatments with NaNO3 in order to obtain zeolites with different acidity and sodium content. A biosorption system consisting of a...
Planeamento e implementação de um sistema de gestão da segurança da informação
Silva, Bruna Patrícia Ribeiro Alves daTese de mestrado integrado. Ciência da Informação. Faculdade de Engenharia. Universidade do Porto. 2011
Dinâmica folicular de vacas de corte tratadas com três protocolos de sincroniza...
Melo, Luciano Cavalheiro; Beskow, Andrei; Silva, Bruna Velho Costa e; Evangelista, Gustavo Tagliari; Gregory, Joana; Marques, Pablo RochaBackground: Artificial insemination is an established and viable technique to accelerate the genetic advancement and economic return of the cattle. However, compromises the efficiency of detection of estrus results in low insemination rates. To avoid these problems in beef herd, synchronization protocols have been developed that allow inseminate large number of animals within a set period of time. These treatme...
Intragenomic variation in the second internal transcribed spacer of the ribosom...
Vesgueiro,Fabiana Tavares; Demari-Silva,Bruna; Malafronte,Rosely dos Santos; Sallum,Maria Anice Mureb; Marrelli,Mauro ToledoCulex is the largest genus of Culicini and includes vectors of several arboviruses and filarial worms. Many species of Culex are morphologically similar, which makes their identification difficult, particularly when using female specimens. To aid evolutionary studies and species distinction, molecular techniques are often used. Sequences of the second internal transcribed spacer (ITS2) of ribosomal DNA (rDNA) f...
Influence of gamma radiation on the antimicrobial activity of crude extracts of...
Santos,Gustavo H. F.; Silva,Edvane B.; Silva,Bruna L.; Sena,Kêsia X. F. R.; Lima,Cláudia S. A.Anacardium occidentale L. Anacardiaceae, known as cashew, commonly found in northeastern of Brazil, has high levels of secondary metabolites, particularly tannins, used as raw material for herbal medicines. An efficient alternative to decontaminate plant products is the total sterilization or reduction of the initial microbial count, the process of gamma irradiation with 60Co. The objective of this study was to...
Optimization of production of extracellular polymeric substances by Arthrobacte...
Quintelas, C.; Silva, Vitor B. da; Silva, Bruna; Figueiredo, Hugo; Tavares, M. T.In this work we aimed to optimize the production of extracellular polymeric substances (EPS) by an Arthrobacter viscosus biofilm supported on 13X zeolite to be used in the biosorption of Cr(VI). The optimization parameters were agitation rate, work volume, pH and glucose concentration. Following the optimization of EPS production, the biofilm was used in the biosorption of hexavalent Cr from liquid solutions. D...
Reutilization of Cr-Y zeolite obtained by biosorption in the catalytic oxidatio...
Silva, Bruna; Figueiredo, Hugo; Santos, V. P.; Pereira, M. F. R.; Figueiredo, J. L.; Lewandowska, A. E.; Bañares, M. A.; Neves, Isabel C.This work aims at the reutilization of a Cr-loaded NaY zeolite obtained by biorecovery of chromium from water as catalyst in the oxidation of volatile organic compounds (VOC). Cr-NaY catalysts were obtained after biosorption of Cr(VI) using a bacterium, Arthrobacter viscosus, supported on the zeolite. The biosorption experiments were conducted at different pH values in the range 1–4. The catalysts were characte...
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