Produção Nacional
Revisado por pares
Leonora Rios de Souza Moreira, Gaspar Virgilio Ferreira, Sheila Sousa Thurler Santos, Ana Paula Souza Ribeiro, Félix Gonçalves de Siqueira, Edivaldo Ximenes Ferreira Filho,
Holocellulose structures from agro-industrial residues rely on main and side chain attacking enzymes with different specificities for complete hydrolysis. Combinations of crude enzymatic extracts from different fungal species, including Aspergillus terreus, Aspergillus oryzae, Aspergillus niger and Trichoderma longibrachiatum, were applied to sugar cane bagasse, banana stem and dirty cotton residue to investigate the hydrolysis of holocellulose structures. A. terreus and A. oryzae were the best ...
Tópico(s): Enzyme Catalysis and Immobilization
2012 - Springer Nature | Brazilian Journal of Microbiology
Produção Nacional
Revisado por pares
Verônica F. Amaral, Vanessa A.O. Ransatto, Fátima Conceição‐Silva, Etelcia Moraes Molinaro, Virgilio Ferreira, S. G. Coutinho, Diane McMahon‐Pratt, Gabriel Grimaldi,
As a means of assessing the usefulness of the Rhesus macaque (Macaca mulatta) as a nonhuman primate model for studying cutaneous leishmaniasis, monkeys were infected withLeishmania amazonensis.Variation in the level of susceptibility was found; however, animals inoculated with 108promastigotes provided consistent results as indicated by an earlier onset and/or larger size of lesions. Three monkeys, which had recovered from skin lesions, were challenge-infected using the same parasite strain/dose; ...
Tópico(s): Trypanosoma species research and implications
1996 - Elsevier BV | Experimental Parasitology
Produção Nacional
Revisado por pares
Márcia Cristina Ribeiro Andrade, Carlos Torres Ribeiro, Virgílio Ferreira da Silva, Etelcia Moraes Molinaro, Miguel Ângelo Brück Gonçalves, Marcos Antônio Pereira Marques, Pedro Hernán Cabello, José Paulo Gagliardi Leite,
Physiological parameters of laboratory animals used for biomedical research is crucial for following several experimental procedures. With the intent to establish baseline biologic parameters for non-human primates held in closed colonies, hematological and morphometric data of captive monkeys were determined. Data of clinically healthy rhesus macaques (Macaca mulatta), cynomolgus monkeys (Macaca fascicularis), and squirrel monkeys (Saimiri sciureus) were collected over a period of five years. Animals ...
Tópico(s): Wildlife Ecology and Conservation
2004 - Instituto Oswaldo Cruz, Ministério da Saúde | Memórias do Instituto Oswaldo Cruz
Produção Nacional
Revisado por pares
Renato Sérgio Marchevsky, Jennifer Mariano, Virgilio Ferreira, Édina Caroline Ferreira Almeida, Maíara Cerqueira, Ricardo de Souza Carvalho, J.W. Pissurno, Annachiara Rosa, Marisol Simões, Cláudia Nunes dos Santos,
A thorough phenotypic characterization of yellow fever (YF) virus generated from cDNA is a necessary prerequisite for mapping virulence/attenuation determinants and exploring the potential of YF attenuated virus 17D as a carrier for heterologous protective epitopes. In this study, YF virus was produced from 17D cDNA clones after lipofectin-mediated RNA transfection of certified primary cultures of chicken embryo fibroblasts (YFiv5.2/SL). This virus was passaged once in embryonated chicken eggs according ...
Tópico(s): Viral Infections and Outbreaks Research
1995 - American Society of Tropical Medicine and Hygiene | American Journal of Tropical Medicine and Hygiene
O estudo busca, primeiramente, refletir sobre os perfis da literatura de introspecção, dando um enfoque especial para a escrita diarística do autor português Vergílio Ferreira. Depois, intenciona mapear a proposta doubrovskiana de autoficção enquanto variante pós-moderna da autobiografia, a partir da análise da conceitualização do gênero feita por Doubrovsky e daquele que seria considerado o primeiro romance autoficcional – Fils (1977), também escrito pelo teórico francês, em resposta à lacuna existente ...
Tópico(s): French Literature and Critical Theory
2013 - | Revista Desassossego
Produção Nacional
Revisado por pares
Virgílio Moraes Ferreira, Tânia Ruiz,
OBJETIVO: Analisar as relações entre agentes comunitários de saúde e os cuidados prestados a idosos. MÉTODOS: Estudo transversal descritivo, com 213 agentes comunitários das 12 unidades básicas de saúde e das 29 unidades de saúde da família de Marília em 2010. Os dados foram coletados por meio de um questionário sociodemográfico, um instrumento de escala de atitudes em relação à velhice (Escala de Neri) e um questionário para avaliar conhecimentos gerontológicos (Questionário Palmore-Neri-Cachioni). ...
Tópico(s): Aging and Gerontology Research
2012 - UNIVERSIDADE DE SÃO PAULO | Revista de Saúde Pública
Produção Nacional
Revisado por pares
André Cristiano Silva Melo, Maria Netto, Virgílio José Martins Ferreira Filho, Elton Fernandes,
This paper presents an organizational analysis methodology aimed at knowledge capitalization with a view to improving business processes. Based on a real problem in a large electric sector firm, this methodology is applied to managing the transport of indivisible exceptional cargo (IEC). In the firm in question, intellectual capital is a critical asset for service performance and is fundamental for achieving business excellence. Applied to the firm's transport management process, the approach proved ...
Tópico(s): Information Technology Governance and Strategy
2010 - Sociedade Brasileira de Pesquisa Operacional | Pesquisa Operacional
Produção Nacional
Revisado por pares
Aníbal Alberto Vilcapoma Ignácio, Virgílio José Martins Ferreira Filho, Roberto D. Galvão,
In this paper a two-level hierarchical model for the location of concentrators and routers in computers networks is presented. Given a set of candidate locations and the capacities of concentrators and routers the problem is to determine how many concentrators and routers should be used, where they should be located and which users to assign to each concentrator and which concentrators to allocate to each router. A Lagrangean relaxation is used to provide lower bounds for this problem, which are ...
Tópico(s): Optimization and Search Problems
2006 - Elsevier BV | Computers & Operations Research
Produção Nacional
Revisado por pares
Hugo Vinícius Bassi, Virgílio José Martins Ferreira Filho, Laura Bahiense,
Some of the most important and expensive activities in the oil field development and production phases relate to using rigs. These can be used for drilling wells, or for maintenance activities. As rigs are usually scarce compared to the number of wells requiring service, a schedule of wells to be drilled or repaired must be devised. The objective is to minimize opportunity costs within certain operating constraints. This paper present the first stochastic approach to deals with the problem of planning ...
Tópico(s): Advanced Manufacturing and Logistics Optimization
2012 - Elsevier BV | Computers & Industrial Engineering
Produção Nacional
Revisado por pares
Nathália da Silva Sena Hermeto, Virgílio José Martins Ferreira Filho, Laura Bahiense,
Oil discoveries of recent years, especially in the pre-salt Santos Basin, reflect a large increase in petroleum exploration and production in Brazil. Accordingly, drilling rig and production platform crew transport demands will increase. This transport will also become more complex as average distance between fields and Brazil's coast increases. The helicopter, the modal most used for this purpose, is the most efficient means of transport in terms of speed and safety, but also entails high costs. ...
Tópico(s): Maritime Ports and Logistics
2014 - Elsevier BV | Computers & Industrial Engineering
Produção Nacional
Revisado por pares
Erito Marques de Souza Filho, Laura Bahiense, Virgílio José Martins Ferreira Filho,
► We proposed an efficient tool for scheduling multi-product pipeline networks. ► The methodology combines an efficient MILP model with a post-processing heuristic. ► Knapsack Cascading constraints were a important structure to the success of the model. ► Constraints on products in pipeline were also important structure in the model. ► The model allows solving larger problems and obtains results better than those known. Daily some millions barrels of oil are moved around the world in imports and exports and ...
Tópico(s): Catalysis and Hydrodesulfurization Studies
2013 - Elsevier BV | Computers & Chemical Engineering
Produção Nacional
Virgílio José Martins Ferreira Filho, Roberto D. Galvão,
The concentrator location problem (CLP) is a classical problem in the network design literature. Given a set of candidate locations and the concentrator capacities, the problem is to answer the following related questions. How many concentrators should be used? Where should they be located? Which users are to be assigned to each concentrator? A Lagrangian relaxation is used to obtain lower bounds for this problem. The Lagrangian relaxation is complemented by a tabu search (TS) metaheuristic. Computational ...
Tópico(s): Optimization and Search Problems
1998 - Elsevier BV | Location Science
Produção Nacional
Revisado por pares
Vinícius Ramos Rosa, Eduardo Camponogara, Virgílio José Martins Ferreira Filho,
This paper presents a practical and effective optimization method to design subsea production networks, which accounts for the number of manifolds and platforms, their location, well assignment to these gathering systems, and pipeline diameter. It brings a fast solution that can be easily implemented as a tool for layout design optimization and simulation-based analysis. The proposed model comprises reservoir dynamics and multiphase flow, relying on multidimensional piecewise linearization to formulate ...
Tópico(s): Oil and Gas Production Techniques
2017 - Elsevier BV | Computers & Chemical Engineering
Produção Nacional
Revisado por pares
Cláudio Ernesto Taveira Parente, Adan Santos Lino, Gabriel Oliveira de Carvalho, Ana Carolina Pizzochero, Cláudio E. Azevedo-Silva, Matheus Oliveira Freitas, Cláudia Teixeira, Rodrigo L. Moura, Virgílio José Martins Ferreira Filho, Olaf Malm,
On January 2019, the B1 iron ore tailings' dam collapsed in Brumadinho, Brazil, being one of the worst mining-related disasters, with 270 human deaths (11 of them still missing) and 12.106 m3 of tailings released to the environment. The tailings devastated the Córrego do Feijão brook and reached the adjacent Paraopeba River, the region's main watercourse and a major tributary of the São Francisco basin. Although physicochemical parameters of the river were strongly impacted, and acute toxicological ...
Tópico(s): Heavy Metal Exposure and Toxicity
2020 - Elsevier BV | Environmental Research
Produção Nacional
Revisado por pares
Danielle de Oliveira Monteiro, M. M. Duque, Gabriela Souza Chaves, Virgílio José Martins Ferreira Filho, Juliana Souza Baioco,
In general, flow measurement systems in production units only report the daily total production rates. As there is no precise control of individual production of each well, the current well flow rates and their parameters are determined when production tests are conducted. Because production tests are performed periodically (e.g., once a month), information about the wells is limited and operational decisions are made using data that are not updated. Meanwhile, well properties and parameters from ...
Tópico(s): Oil and Gas Production Techniques
2020 - EDP Sciences | Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles
Produção Nacional
Revisado por pares
Gabriela Souza Chaves, Hamidreza Karami, Virgílio José Martins Ferreira Filho, Bruno Ferreira Vieira,
Tópico(s): Drilling and Well Engineering
2021 - Elsevier BV | Journal of Petroleum Science and Engineering
Produção Nacional
Revisado por pares
Gustavo Cunha de Bittencourt, Rennan Danilo Seimetz Chagas, Victor Anselmo Silva, Igor Girão Peres Vianna, Rafael Pedro Longhi, Paulo César Ribas, Virgílio José Martins Ferreira Filho,
In order to support deep-sea oil and gas exploration and production operations, platform supply vessel plays a critical role, being the main transport resource to meet the demand of supplies ordered by maritime units. This leads to problems in efficiently allocating supplies to vessels and cost-effectively assessing the fleet size. Aiming to solve these problems, we propose a framework based on the integration of a mixed-integer programming model, which selects the supply set each vessel should ...
Tópico(s): Urban and Freight Transport Logistics
2021 - Elsevier BV | Computers & Industrial Engineering
Leonardo Ricotti, Alessandro Polini, Giada Graziana Genchi, Gianni Ciofani, Donata Iandolo, Helena Vazão, Virgilio Mattoli, Lino Ferreira, Arianna Menciassi, Dario Pisignano,
This study aims at investigating the behavior in terms of the proliferation and skeletal muscle differentiation capability of two myoblastic cell lines, C2C12 and H9c2, on both isotropic and anisotropic electrospun nanofibrous poly(hydroxybutyrate) (PHB) scaffolds, as well as on PHB films and polystyrene controls. After a careful characterization of the matrices in terms of surface morphology, surface roughness and mechanical properties, the proliferation rate and the capability of the two cell lines ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2012 - IOP Publishing | Biomedical Materials
Produção Nacional
Revisado por pares
Fernando dos Santos Virgilio, Camila Pontes Ferreira, Mariana R. Dominguez, Jonatan Ersching, Maurício M. Rodrigues, José Ronnie Vasconcelos,
MHC-restricted CD8(+) T cells are important during infection with the intracellular protozoan parasite Trypanosoma cruzi, the causative agent of Chagas disease. Experimental studies performed in the past 25 years have elucidated a number of features related to the immune response mediated by these T cells, which are important for establishing the parasite/host equilibrium leading to chronic infection. CD8(+) T cells are specific for highly immunodominant antigens expressed by members of the trans- ...
Tópico(s): Plant Virus Research Studies
2014 - Hindawi Publishing Corporation | Mediators of Inflammation
Leonardo Ricotti, Toshinori Fujie, Helena Vazão, Gianni Ciofani, Roberto Marotta, Rosaria Brescia, Carlo Filippeschi, Irene Corradini, Michela Matteoli, Virgilio Mattoli, Lino Ferreira, Arianna Menciassi,
In this paper, we describe the effects of the combination of topographical, mechanical, chemical and intracellular electrical stimuli on a co-culture of fibroblasts and skeletal muscle cells. The co-culture was anisotropically grown onto an engineered micro-grooved (10 µm-wide grooves) polyacrylamide substrate, showing a precisely tuned Young's modulus (∼ 14 kPa) and a small thickness (∼ 12 µm). We enhanced the co-culture properties through intracellular stimulation produced by piezoelectric nanostructures ( ...
Tópico(s): Bone Tissue Engineering Materials
2013 - Public Library of Science | PLoS ONE
Produção Nacional
Revisado por pares
Alan Lima Vieira, Daniel A. Gonçalves, Alex Virgílio, Edilene Cristina Ferreira, Bradley T. Jones, George L. Donati, José Anchieta Gomes Neto,
Spectra of diatomic molecules are rich in fine structures which may be used for different analytical applications in high-resolution continuum source molecular absorption spectrometry (HR-CS MAS).
Tópico(s): Analytical Chemistry and Chromatography
2019 - Royal Society of Chemistry | Journal of Analytical Atomic Spectrometry
Produção Nacional
Revisado por pares
André Cristiano da Silva Melo, Virgílio José Martins Ferreira Filho,
Tópico(s): Advanced Manufacturing and Logistics Optimization
2001 - Sociedade Brasileira de Pesquisa Operacional | Pesquisa Operacional
Produção Nacional
Revisado por pares
Daniel Barry Fuller, Virgílio José Martins Ferreira Filho, Edilson F. Arruda,
Simulation is an important tool to evaluate many systems, but it often requires detailed knowledge of each specific system and a long time to generate useful results and insights. A large portion of the required time stems from the need to define operational rules and build valid models that represent them properly. To shorten this model construction time, a learning-agent-based model is proposed. This technique is recommended for cases where optimal policies are not known or hard and costly to ...
Tópico(s): Scheduling and Optimization Algorithms
2018 - Elsevier BV | Computers & Chemical Engineering
H. G. Ferreira, Virgilio L. Lew,
Tópico(s): Lipid Membrane Structure and Behavior
1976 - Nature Portfolio | Nature
Produção Nacional
Revisado por pares
Carolina Cruz Ferreira, Virgilio Pereira Ricci, Lucíola Lucena de Sousa, Neide Aparecida Mariano, Maria Gabriela Nogueira Campos,
Heart diseases affect part of world population and generally involves the functioning of valves. Valves replacement is the most common treatment and the choice between synthetic or natural/biological implants depends on several factors. Synthetic implants have greater durability, whereas biological ones are more biocompatible. This work proposes the use of polymeric coating on titanium metal surface to increase implant biocompatibility. Poly-caprolactone (PCL) has demonstrated greater efficacy for ...
Tópico(s): Cardiac Valve Diseases and Treatments
2018 - Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer | Materials Research
Produção Nacional
Revisado por pares
Roberto Alves Lourenço, Virgílio Garcia Moreira, Eliane Ferreira Carvalho Banhato, Danielle Viveiros Guedes, Kelly Cristina Atalaia da Silva, Francisco Eduardo da Fonseca Delgado, Cláudia Helena Cerqueira Mármora,
Resumo Fragilidade é um estado de vulnerabilidade fisiológica multissistêmica relacionada à idade e a um risco aumentado de desfechos adversos. O objetivo do presente estudo foi avaliar a prevalência e os fatores associados à fragilidade no estudo FIBRA em Minas Gerais, Brasil. Selecionou-se uma amostra aleatória, estratificada por unidade territorial, sexo e idade, de 461 indivíduos, com 65 anos ou mais. A fragilidade foi estabelecida pela presença de três ou mais de cinco itens: sensação de exaustão, ...
Tópico(s): Health Systems, Economic Evaluations, Quality of Life
2019 - ASSOCIAÇÃO BRASILEIRA DE SAÚDE COLETIVA | Ciência & Saúde Coletiva
Georges Snounou, L Pinheiro, Ana Maria Antunes, Conceição Ferreira, Virgilio E do Rosario,
Malaria parasite species circulating in immune inhabitants of the Democratic Republic of São Tomé e Principe (DRSTP) and those acquired by non-immune travellers returning from this country have been compared. Using sensitive detection and species identification by PCR, Plasmodium parasites were found in the blood of 16 of the 43 travellers, who reported during the first 8 months of 1995 to a clinical diagnosis laboratory in Lisbon. Plasmodium vivax was found in four (25%) and Plasmodium ovale in ten ( ...
Tópico(s): Mosquito-borne diseases and control
1998 - Elsevier BV | Acta Tropica
Produção Nacional
Revisado por pares
Virgílio José Martins Ferreira Neto, Thiago de Souza Belan Costa, André L.L. Magalhães, Alexandre B. Gaspar, P.G. Pries de Oliveira, Fabiana Magalhães Teixeira Mendes,
A high surface area activated carbon was obtained from sugar cane straw by chemical activation with phosphoric acid and was used for the first time as a support for vanadium catalysts. This work aims to investigate the vanadium oxide species in a low surface density (up to 1 V atom nm−2) on this new support, especially applied to propane oxidation reaction. Moreover, commercial activated carbon materials were used as support for comparison. The discussion is conducted in terms of catalyst textural ...
Tópico(s): Mesoporous Materials and Catalysis
2017 - Elsevier BV | Molecular Catalysis
Produção Nacional
Revisado por pares
Kelber Miranda, Alan Lima Vieira, Marcos André Bechlin, Felipe Manfroi Fortunato, Alex Virgílio, Edilene Cristina Ferreira, José Anchieta Gomes Neto,
Establishing fast, simple, low-cost, and efficient sample preparation procedures to determine elements in foodstuffs is a relevant aspect for nutritional and health purposes. For this reason, the recently proposed closed-vessel conductively heated digestion system (CHDS) was evaluated for the digestion of milk powder, chocolate powder, and soluble coffee samples aiming for Ca, Cu, Fe, K, Mg, Mn, Na, and Zn determinations by high-resolution continuum source flame atomic absorption spectrometry (HR- ...
Tópico(s): Heavy Metals in Plants
2015 - Springer Science+Business Media | Food Analytical Methods
Virgilio L. Lew, H. G. Ferreira,
Tópico(s): Lipid Membrane Structure and Behavior
1978 - Elsevier BV | Current topics in membranes and transport