Produção Nacional
Revisado por pares
Karen Segala, Rosilene Linhares Dutra, César V. Franco, Ângela S. Pereira, Tito Trindade,
Nanosized semiconductor particles are of great scientific and technological interest because of their size-dependent electronic and optical properties. Semiconductor nanocrystals have been investigated, for example, as nano-fillers for diverse polymer matrices in order to produce new optically active materials. Here we report, for the first time, results concerning the preparation of nanocomposites made of ZnO nanocrystals (NCs) incorporated in the co-polymer poly-{trans-[RuCl2(vpy)4]/sty (sty = styrene ...
Tópico(s): Advanced Polymer Synthesis and Characterization
2010 - Brazilian Chemical Society | Journal of the Brazilian Chemical Society
Produção Nacional
Revisado por pares
Thiago Dutra, César J. Deschamps,
Gas superheating is responsible for almost half of the thermodynamic energy loss in small reciprocating compressors adopted for household refrigeration. This is a direct effect of heat transfer between the gas and solid components along the suction system and inside the compression chamber. An experimental study was conducted into heat transfer in the components of a small reciprocating compressor under three operating conditions. Measurements were carried out with thin film heat flux sensors and ...
Tópico(s): Heat Transfer and Boiling Studies
2013 - Elsevier BV | Applied Thermal Engineering
Produção Nacional
Revisado por pares
Thiago Dutra, César J. Deschamps,
The design of a high-efficiency reciprocating compressor requires an understanding of the interactions between different phenomena occurring inside the compressor. This paper describes a comprehensive simulation approach for hermetic reciprocating compressors including modeling of the electrical motor. The simulation of the compression cycle follows an integral control volume formulation for mass and energy conservation. A thermal model is adopted with steady-state thermal energy balances applied ...
Tópico(s): Heat Transfer and Optimization
2015 - Elsevier BV | International Journal of Refrigeration
Produção Nacional
Revisado por pares
O. Lourenço, M. Dutra, César H. Lenzi, César V. Flores, Débora P. Menezes,
We have obtained the Love number and corresponding tidal deformabilites ($\Lambda$) associated with the relativistic mean-field parametrizations shown to be consistent (CRMF) with the nuclear matter, pure neutron matter, symmetry energy and its derivatives [Dutra, et al., Phys. Rev. C 90, 055203 (2014)]. Our results show that CRMF models present very good agreement with the recent data from binary neutron star merger event GW170817. They also confirm the strong correlation between $\Lambda_{1.4}$ and the ...
Tópico(s): High-pressure geophysics and materials
2019 - American Physical Society | Physical review. C
Produção Nacional
Revisado por pares
O. Lourenço, M. Dutra, César H. Lenzi, M. Bhuyan, S. K. Biswal, B. M. Santos,
Abstract We propose a density-dependent function for the attractive interaction in the original van der Waals model to correctly describe the flow constraint at the high-density regime of the symmetric nuclear matter. After a generalization to asymmetric nuclear matter, it was also possible to study the stellar matter regime from this new model. The mass–radius relation for neutron stars under β -equilibrium is found to agree with recent X-ray observations. The neutron-star masses supported against ...
Tópico(s): High-pressure geophysics and materials
2019 - IOP Publishing | The Astrophysical Journal
Produção Nacional
Revisado por pares
Claudio J. Santos, Thiago Dutra, César J. Deschamps,
The piston of linear compressors is subjected to low side loads and metal contact can be avoided by feeding high-pressure refrigerant gas from the discharge system into the piston-cylinder clearance. This paper reports a thorough study on the inefficiencies associated with leakage and viscous friction brought about by the transient compressible fluid flow in the piston-cylinder clearance of an oil-free linear compressor. The main objective is to understand the effect of design parameters, such as ...
Tópico(s): Hydraulic and Pneumatic Systems
2019 - Elsevier BV | International Journal of Refrigeration
Produção Nacional
Revisado por pares
L. A. Souza, M. Dutra, César H. Lenzi, O. Lourenço,
In the present work, we investigate the effects of short-range correlations (SRC) on the dimensionless deformability of the binary neutron system related to the GW170817 event. We implemented phenomenological SRC in a relativistic mean-field model in which the bulk parameters, namely, incompressibility (${K}_{0}$), effective nucleon mass ratio (${m}^{*}$), symmetry energy ($J$), and its slope (${L}_{0}$), are independently controlled. Our results point out that the SRC favor the model to pass through the constraints, ...
Tópico(s): Astrophysical Phenomena and Observations
2020 - American Physical Society | Physical review. C
Produção Nacional
Revisado por pares
O. Lourenço, M. Dutra, César H. Lenzi, S. K. Biswal, M. Bhuyan, Débora P. Menezes,
The high-density behavior of the stellar matter composed of nucleons and leptons under $\beta$~equilibrium and charge neutrality conditions is studied with the Skyrme parametrizations shown to be consistent (CSkP) with the nuclear matter, pure neutron matter, symmetry energy and its derivatives in a set of $11$ constraints [Dutra {\it et al.}, Phys. Rev. C 85, 035201 (2012)]. The predictions of these parametrizations on the tidal deformabilities related to the GW170817 event are also examined. The CSkP ...
Tópico(s): Nuclear physics research studies
2020 - Springer Science+Business Media | The European Physical Journal A
Produção Nacional
Revisado por pares
M. Dutra, César H. Lenzi, O. Lourenço,
ABSTRACT In this work we study a relativistic mean-field (RMF) hadronic model, with nucleonic short-range correlations (SRC) included, coupled to dark matter (DM) through the Higgs boson. We study different parametrizations of this model by running the dark particle Fermi momentum, and its mass in the range of 50GeV ≤ Mχ ≤ 500GeV, compatible with experimental spin-independent scattering cross-sections. By using this RMF-SRC-DM model, we calculate some neutron star quantities, namely, mass–radius profiles, ...
Tópico(s): Cosmology and Gravitation Theories
2022 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Produção Nacional
Revisado por pares
Antônio J. S. Castro, César Koppe Grisólia, Bruna Araújo, C.D. Dias, Elaine Silvia Dutra, Júlio César Nepomuceno,
Caryocar brasiliense Camb. is a tree popularly known in Central Brazil as pequi. Its fruit contains carotenes, retinols, vitamin C, and polyphenols. These compounds possess antioxidant properties preventing excessive free radical formation and modulating the genotoxicity of physical and chemical agents in the body. However, at high concentrations these compounds can have recombinogenic and mutagenic effects, because they can act as pro-oxidants. We examined the genotoxic effects of aqueous extracts ...
Tópico(s): Animal and Plant Science Education
2008 - Research Foundation of Ribeirão Preto | Genetics and Molecular Research
Produção Nacional
Revisado por pares
Tatiana Pádua Tavares de Freitas, Alexine Keuroghlian, Donald P. Eaton, Emanuel Barbosa de Freitas, Aline de Oliveira Figueiredo, Luciano Nakazato, Jacqueline M. de Oliveira, Flávia Regina Miranda, R. C. S. Paes, Letícia Almeida Retumba Carneiro Monteiro, José Vergílio Bernardes Lima, Aparecida A. da C. Neto, Valéria Dutra, Júlio César de Freitas,
Tópico(s): Leptospirosis research and findings
2010 - Springer Science+Business Media | Tropical Animal Health and Production
Produção Nacional
Revisado por pares
Emmanoel Vilaça Costa, Lívia Macedo Dutra, Hugo César Ramos de Jesus, Paulo César de Lima Nogueira, Valéria Regina de Souza Moraes, Marcos José Salvador, Sócrates Cabral de Holanda Cavalcanti, Roseli La Corte dos Santos, Ana Paula do Nacimento Prata,
The essential oils from the leaves of Annona salzmannii and A. pickelii (Annonaceae) growing in Sergipe, northeastern region of Brazil, were obtained by hydrodistillation using a Clevenger-type apparatus, and analyzed by GC/MS and GC/FID. Thirty-four compounds were identified in the essential oil of A. salzmannii and twenty-seven in that of A. pickelii; sesquiterpenes predominated in both essential oils. Bicyclogermacrene (20.3%), ( E)-caryophyllene (19.9%), δ-cadinene (15.3%), α-copaene (10.0%), and allo- ...
Tópico(s): Insect Pest Control Strategies
2011 - SAGE Publishing | Natural Product Communications
Produção Nacional
Revisado por pares
Emmanoel Vilaça Costa, Lívia Macedo Dutra, Paulo César de Lima Nogueira, Valéria Regina de Souza Moraes, Marcos José Salvador, Luis Henrique Gonzaga Ribeiro, Fernanda Ramos Gadelha,
The essential oil from the leaves of Annona vepretorun was obtained by hydrodistillation using a Clevenger-type apparatus and analyzed by GC-MS and GC-FID. Eighteen compounds representing 98.1% of the crude essential oil were identified. The major compounds identified were bicyclogermacrene (43.7%), spathulenol (11.4%), alpha-felandrene (10.0%), alpha-pinene (7.1%), (E)-beta-ocimene (6.8%), germacrene D (5.8%), and p-cymene (4.2%). The trypanocidal activity against Trypanosoma cruzi epimastigote forms, ...
Tópico(s): Insect Pest Control Strategies
2012 - SAGE Publishing | Natural Product Communications
Produção Nacional
Revisado por pares
Silvino Intra Moreira, Deiziane da Consolação Dutra, Augusto César Evelin Rodrigues, José Rogério de Oliveira, O. D. Dhingra, Olinto Liparini Pereira,
Tópico(s): Ginger and Zingiberaceae research
2013 - Springer Science+Business Media | Tropical Plant Pathology
Produção Nacional
Revisado por pares
Rose Marie Meinicke Bühler, Anderson Cesar Dutra, Francielo Vendruscolo, Denise Esteves Moritz, Jorge Luiz Ninow,
The study and use of natural pigments in food industries have increased in recent years due to the toxicity presented by artificial pigments. Monascus ruber is a filamentous fungus that produces red, orange, and yellow pigments under different growing conditions. The growth of health food market has increased in parallel with the growth in biofuels production, such as biodiesel, which generates a concomitant increase in the production of glycerin that can be used in bioprocesses. The objective of ...
Tópico(s): Fungal Biology and Applications
2013 - Sociedade Brasileira de Ciência e Tecnologia de Alimentos | Food Science and Technology
Produção Nacional
Revisado por pares
Talita Tuon, Priscila S. Souza, Marcela Farias dos Santos, Fernanda T. Pereira, Giulia S. Pedroso, Thais F. Luciano, Cláudio Teodoro de Souza, Rafael C. Dutra, Paulo César Lock Silveira, Ricardo A. Pinho,
This study aimed to evaluate the effects of two different protocols for physical exercise (strength and aerobic training) on mitochondrial and inflammatory parameters in the 6-OHDA experimental model of Parkinson's disease. Six experimental groups were used (n = 12 per group): untrained + vehicle (Sham), strength training + vehicle (STR), treadmill training + vehicle (TTR), untrained + 6-OHDA (U + 6-OHDA), strength training + 6-OHDA (STR + 6-OHDA), and treadmill training + 6-OHDA (TTR + 6-OHDA). The mice were subjected to ...
Tópico(s): Amyotrophic Lateral Sclerosis Research
2015 - Hindawi Publishing Corporation | Oxidative Medicine and Cellular Longevity
Produção Nacional
Revisado por pares
Alecssandro Regal Dutra, Augusto César de Queiroz, José Carlos Pereira, Sebastião de Campos Valadares Filho, José Tarcísio L Thiébaut, Fernando Nascimento Matos, Cláudio Vaz Di Mambro Ribeiro,
Tópico(s): Agricultural and Food Sciences
1997 - Sociedade Brasileira de Zootecnia | Revista Brasileira de Zootecnia
Lionel Helfer, Thaïs Dutra Vieira, César Praz, Jean Marie Fayard, Mathieu Thaunat, Adnan Saithna, Bertrand Sonnery‐Cottet,
Tópico(s): Shoulder Injury and Treatment
2019 - Springer Science+Business Media | Knee Surgery Sports Traumatology Arthroscopy
Produção Nacional
Revisado por pares
C.D. Dias, B.C. Arajo, Elaine Silvia Dutra, Júlio César Nepomuceno,
beta-carotene (BC), pro-vitamin A, is an efficient antioxidant, effective in the neutralization of oxygen reactive species, which cause serious damage to DNA. Various studies have been conducted on the effectiveness of BC for chemoprevention of cancer and heart disease. Doxorubicin is a chemotherapeutic agent used for cancer treatment that generates free radicals. We examined the effects of BC (1, 2 and 4 mg/mL) on the genotoxicity of doxorubicin (0.125 mg/mL), using the wing spot test in Drosophila ...
Tópico(s): Bioactive Compounds and Antitumor Agents
2009 - Research Foundation of Ribeirão Preto | Genetics and Molecular Research
Rosa F. Dutra, Cesar M. Castro, Christophe Azevedo, Ester Vinhas, E Malagueño, E. H. M. Melo, J. L. Lima Filho, John F. Kennedy,
One the most important aspects of a biosensor is related to immobilization and maintenance of specific reference compounds on sensing surfaces. A method for the immobilization of polysaccharides to a silicon oxide surface intended for Surface Acoustical Waves (SAW) sensors is described. Silicon oxide is a hydrophobic inorganic support used for the fabrication of many electronic devices. The pneumococcal polysaccharide (PPS) vaccine is immobilized via Protein A after pre-treatment of the surface with ...
Tópico(s): Biosensors and Analytical Detection
2000 - Elsevier BV | Biosensors and Bioelectronics
Produção Nacional
Revisado por pares
Ananda Sampaio Lamenha Falcão de Melo, Juliana Louise Dias Lima, Maria Carolina Silva Malta, Natália França Marroquim, Álvaro Rivelli Moreira, Isabelle de Almeida Ladeia, Fabrízio dos Santos Cardoso, Daniel Buzaglo Gonçalves, Bruna Guimarães Dutra, Júlio César Claudino dos Santos,
Creutzfeldt-Jakob disease (CJD) is a rare and fatal condition that leads to progressive neurodegeneration due to gliosis, vacuolation of central nervous system tissue, and loss of neurons. Microglia play a crucial role in maintaining Central Nervous System (CNS) homoeostasis, both in health and disease, through phagocytosis and cytokine production. In the context of CJD, the immunomodulatory function of microglia turns it into a cell of particular interest. Microglia would be activated by infectious ...
Tópico(s): Nuclear Receptors and Signaling
2021 - Landes Bioscience | Prion
Eloísa Dutra Caldas, Luiz César Kenupp R de Souza,
The objective was to conduct a dietary risk assessment of pesticides registered in Brazil up to 14 January 2004. The theoretical maximum daily intake (TMDI) was calculated for 275 compounds using the Brazilian maximum residue limits (MRL) and food consumption. The chronic dietary risk assessment was conducted by comparing the TMDI with the Brazilian acceptable daily intake (ADI) or, when not available, with the ADI from other sources. The TMDI was higher than the ADI (%ADI>100) in at least one Brazilian ...
Tópico(s): Toxic Organic Pollutants Impact
2004 - Taylor & Francis | Food Additives & Contaminants
Produção Nacional
Revisado por pares
Eloísa Dutra Caldas, Luiz César Kenupp R de Souza,
OBJETIVO: Avaliar o risco crônico da ingestão de pesticidas pela dieta, em compostos registrados no Brasil para uso agrícola até 1999. MÉTODOS: Foi calculada a Ingestão Diária Máxima Teórica (IDMT) para cada pesticida, utilizando limites máximos de resíduos estabelecidos pela legislação brasileira e dados de consumo alimentar. A caracterização do risco foi feita comparando-se a IDMT com as doses diárias aceitáveis (IDA) de vários países e do Codex Alimentarius. RESULTADOS: A IDTM ultrapassou a IDA (% ...
Tópico(s): Pesticide Exposure and Toxicity
2000 - UNIVERSIDADE DE SÃO PAULO | Revista de Saúde Pública
Produção Nacional
Revisado por pares
Rubens Fazan, Gustavo Ballejo, Maria Cristina O. Salgado, Márcio Flávio Dutra Moraes, Hélio César Salgado,
Abstract In conscious chronic (12 to 18 weeks) streptozotocin diabetic rats, we examined the changes in basal heart rate, with particular attention to heart rate variability assessed by evaluating the standard deviation (bpm) of the lengths of adjacent pulse pressure. We also investigated in anesthetized rats the ability of the aortic baroreceptors to acutely (30 minutes) reset to hypertensive levels. For this purpose, pressure-nerve activity curves for the baroreceptors were obtained, and gain (slope ...
Tópico(s): Non-Invasive Vital Sign Monitoring
1997 - Lippincott Williams & Wilkins | Hypertension
Produção Nacional
Revisado por pares
Denise Anete Madureira de Alvarenga, Richard Culleton, Anielle de Pina-Costa, Danielle Fonseca Rodrigues, Cesare Bianco, Sidnei Silva, Ana Júlia Dutra Nunes, Júlio César de Souza, Zelinda Maria Braga Hirano, Sílvia Bahadian Moreira, Alcides Pissinatti, Filipe Vieira Santos de Abreu, André Luiz Lisboa Areas, Ricardo Lourenço‐de‐Oliveira, Mariano Zalis, Maria de Fátima Ferreira‐da‐Cruz, Patrícia Brasil, Cláudio Tadeu Daniel‐Ribeiro, Cristiana Ferreira Alves de Brito,
Abstract Zoonotic malaria poses a unique problem for malaria control. Autochthonous cases of human malaria in the Atlantic Forest have recently been attributed to Plasmodium simium , a parasite that commonly infects non-human primates in this Brazilian biome. However, due to its close similarity at both the morphological and molecular level to Plasmodium vivax , the diagnosis of P. simium in this region remains problematic. Therefore, a diagnostic assay able to accurately identify P. simium is important ...
Tópico(s): Bird parasitology and diseases
2018 - Nature Portfolio | Scientific Reports
Produção Nacional
Revisado por pares
Júlio César Dutra, Fulvio Siciliano, Angelo Fernando Padilha,
The continuing development of stainless steels has resulted in complex steel compositions with substantial amounts of alloying elements. The benefits of such additions invariably come attached to unavoidable disadvantages. One of the most critical item is the potential microstructural instability of the material. Alloying elements may be in a supersaturated solid solution, in which the precipitation of carbides, nitrides, borides and intermetallic phases occurs in a wide range of temperatures. In ...
Tópico(s): High-Temperature Coating Behaviors
2002 - Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer | Materials Research
Produção Nacional
Revisado por pares
Angelo Fernando Padilha, Júlio César Dutra, Valerie Randlè,
With the aid of various complementary methods of microstructural analysis, the precipitation, grain growth, and secondary recrystallisation behaviour of an 15Cr–15Ni–1·2Mo–Ti–B (wt-%) austenitic stainless steel were studied over prolonged periods of time in the temperature range 600–1300°C. The experimental results showed that several types of precipitates were present in the material, and that the dissolution temperatures of each of these correlated with the type and extent of grain growth which ...
Tópico(s): Microstructure and mechanical properties
1999 - Maney Publishing | Materials Science and Technology
Produção Nacional
Revisado por pares
Thiago Feital, Uwe Krüger, Júlio César Sampaio Dutra, José Carlos Pinto, Enrique Luis Lima,
A multimodal modeling and monitoring approach based on maximum likelihood principal component analysis and a component‐wise identification of operating modes are presented. Analyzing each principal component individually allows separating components describing the variation within the individual modes from those capturing variation which the modes commonly share. On the basis of the former set, a Gaussian mixture model produces a statistical fingerprint that describes the production modes. The advantage ...
Tópico(s): Advanced Statistical Process Monitoring
2012 - Wiley | AIChE Journal
Produção Nacional
Revisado por pares
José Carlos Nicolau, Marcelo Franken, Paulo A. Lotufo, Antônio Carlos Carvalho, José Antônio Marin‐Neto, Felipe Gallego Lima, Óscar Pereira Dutra, Elias Knobel, César Cardoso de Oliveira, Sérgio Timerman, Edson Stefanini,
FUNDAMENTO: Pouco se sabe, em nosso meio, sobre diferenças regionais no tratamento da coronariopatia aguda. OBJETIVO: Analisar o comportamento regional relativamente à utilização de terapêuticas comprovadamente úteis na coronariopatia aguda. MÉTODOS: Foram selecionados aleatoriamente 71 hospitais, respeitando-se a proporcionalidade do país em relação à localização geográfica, entre outros critérios. Na população global, foi analisada regionalmente a utilização de AAS, clopidogrel, inibidor da ECA/ ...
Tópico(s): Healthcare Regulation
2012 - Sociedade Brasileira de Cardiologia (SBC) | Arquivos Brasileiros de Cardiologia
Produção Nacional
Revisado por pares
Flávio Dutra de Resende, Augusto César de Queiróz, José Victor de Oliveira, José Carlos Pereira, Antônio Bento Mâncio,
Os objetivos deste trabalho foram avaliar os efeitos da relação volumoso: concentrado sobre ganho de peso e conversão alimentar e determinar a digestibilidade aparente dos nutrientes de 25 e 20 novilhos mestiços, com 310 kg PV médio inicial, respectivamente. Cinco dietas foram fornecidas à vontade, à base de feno de capim-tanzânia e concentrado, em diferentes proporções de volumoso:concentrado (85:15; 70:30; 55:45; 40:60; e 25:75). A análise de regressão dos coeficientes de digestibilidade aparente ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
2001 - Sociedade Brasileira de Zootecnia | Revista Brasileira de Zootecnia