oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 4 )

2019 ( 309 )

2018 ( 357 )

2017 ( 304 )

Custom range...

Search Results: 1 - 10 of 161893 matches for " Fabiano Augusto Assun？？o Silva "
All listed articles are free for downloading (OA Articles)
Page 1 /161893
Display every page Item
An Online mtDNA Tool for Identification of Neotropical Psittacid Species and Taxonomic Issues: A Study Case of the Amazona ochrocephala Complex  [PDF]
Anderson Vieira Chaves, R.O.P. Queiroz-Filho, Fabiano Augusto Assun？？o Silva, Cristina Yumi Miyaki, Fabrício Rodrigues dos Santos
Natural Resources (NR) , 2014, DOI: 10.4236/nr.2014.511056
Abstract:
Parrots are among the most popular pets in the world and they are also some of the most illegally traded, particularly in Brazil. Some computational tools were recently developed by researchers based on molecular databases for taxonomy support, forensic identification and conservation purposes. In this study, the DNA Surveillance platform was used to build an online database tool for molecular identification of Brazilian Psittacids using DNA sequences of six mitochondrial genes. To illustrate possible taxonomic issues of the online tool due to interspecific hybridization or unresolved taxonomy, we focused on Amazona aestiva that is considered as one of the most common parrots in Brazil, commonly bred as pets, and considered to be part of a species complex with Amazona ochrocephala from South America. We provide three curated sequence databases, which allow the species identification of individuals or tissue samples of birds of the Psittacidae family using mitochondrial DNA markers, and a comprehensive description of a taxonomic issue involving the A. ochrocephala complex. The results obtained corroborate previous studies suggesting that these species are not reciprocally monophyletic, due to either an ancient hybridization in central Brazil, or, they maybe just are morpho-varieties of the same species. Alternatively, if A. aestiva and A. ochrocephala were considered as sister species, the data could be interpreted either as a result of secondary contact or incipient speciation. Beyond the use of mtDNA for species identification, the high mtDNA haplotype diversity observed in A. aestiva indicates its potential use in discrimination of lineages that could be an important auxiliary tool to certify the captive origin of legally commercialized parrots.
Spatial distribution of the Human T-Lymphotropic Virus types I and II (HTLV-I/II) infection among blood donors of Hemominas Foundation, Belo Horizonte, Minas Gerais State, Brazil, 1994-1996
Monteiro-de-Castro, M？nica Silva;Assun？？o, Renato Martins;Proietti, Fernando Augusto;
Cadernos de Saúde Pública , 2001, DOI: 10.1590/S0102-311X2001000500022
Abstract: we conducted a cross-sectional study of the spatial distribution of htlv-i/ii infection among blood donors of hemominas foundation, living in belo horizonte, from 1994 to 1996. study population (1,022) was composed by 533 cases (positive western blot (wb), indeterminate wb and elisa positive without wb result) and a random sample of 489 non-cases (htlv-i/ii serum negative). cases and non-cases were georeferenced using the exact or an approximation of the household address reported at the blood donation interview. using multivariate analysis, cases with wb result are less likely to be reposition blood donors compared to voluntary ones (or = 0.70; ci 95%: 0.50-0.99). using the difference between univariate k functions, we found no evidence that cases and non-cases differ in their spatial distribution. we found no evidence that cases with and without wb result differ in the distance between their residence and hemominas foundation. no donors without wb result were georeferenced by the exact address. these donors could not have received the hemominas letter inviting them to return to collect the second blood sample.
Spatial distribution of the Human T-Lymphotropic Virus types I and II (HTLV-I/II) infection among blood donors of Hemominas Foundation, Belo Horizonte, Minas Gerais State, Brazil, 1994-1996
Monteiro-de-Castro M？nica Silva,Assun？？o Renato Martins,Proietti Fernando Augusto
Cadernos de Saúde Pública , 2001,
Abstract: We conducted a cross-sectional study of the spatial distribution of HTLV-I/II infection among blood donors of Hemominas Foundation, living in Belo Horizonte, from 1994 to 1996. Study population (1,022) was composed by 533 cases (positive Western Blot (WB), indeterminate WB and ELISA positive without WB result) and a random sample of 489 non-cases (HTLV-I/II serum negative). Cases and non-cases were georeferenced using the exact or an approximation of the household address reported at the blood donation interview. Using multivariate analysis, cases with WB result are less likely to be reposition blood donors compared to voluntary ones (OR = 0.70; CI 95%: 0.50-0.99). Using the difference between univariate K functions, we found no evidence that cases and non-cases differ in their spatial distribution. We found no evidence that cases with and without WB result differ in the distance between their residence and Hemominas Foundation. No donors without WB result were georeferenced by the exact address. These donors could not have received the Hemominas letter inviting them to return to collect the second blood sample.
Estudo clínico aberto multicêntrico da efetividade e tolerabilidade do gel de adapaleno a 0,1%* em pacientes com acne vulgar
Ramos-e-Silva, Marcia;Carneiro, Sueli Coelho da Silva;Ponzio, Humberto Antonio;Assun？？o, Bernardo Faria Gontijo;Cardoso, Alberto Eduardo Cox;Almeida, Fernando Augusto de;Zaitz, Clarisse;Campbell, Iphis;
Anais Brasileiros de Dermatologia , 2003, DOI: 10.1590/S0365-05962003000200003
Abstract: background: adapalene, a naftoic acid derivative with biological properties similar to those of the retinoic acid, is indicated in the treatment of acne vulgaris. objectives: the present study was carried out to evaluate the therapeutic action of adapalene 0.1% gel and its tolerability in the treatment of mild to moderate acne vulgaris in patients living in brazil. material and methods: patients applied the gel at night for 12 weeks; and were evaluated regarding the efficacy and tolerability of the product according to the number of lesions observed at each of the 2-week and 12-week visits. results: out of 125 patients, 81.6% completed 12 weeks of therapy and 10.4% of the cases left the study before week 12 because they were found to be lesion-free. results allow us to confirm its effect upon keratinocyte cellular differentiation with antiinflammatory and antiproliferative properties. adapalene induces a marked decrease in comedos and inflammatory lesions. mild adverse events were reported in less than 10% of patients. conclusion: adapalene has been shown to be one of the best topical therapies for mild or moderate acne both in the present study and in previous studies.
Determination of sucrose concentration in lemon-type soft drinks by dispersive Raman spectroscopy
Landulfo Silveira Jr.,Leonardo Marmo Moreira,Viviane G. B. Concei o,Heliodora L. Casalechi,Ingrid S. Mu oz,Fabiano Fernandes Da Silva,Marcos Augusto S. R. Silva,Renato Aparecido De Souza,Marcos Tadeu T. Pacheco
Spectroscopy: An International Journal , 2009, DOI: 10.3233/spe-2009-0383
Abstract: The objective of this study was to quantify the sucrose amount in commercial lemon-type soft drinks through dispersive Raman spectroscopy, comparing the amount listed in the nutritional table of each product to the predicted by a least-square model, in order to obtain a method for quality assurance applied to soft drinks. A dispersive Raman spectrometer was employed using 830 nm laser and imaging spectrograph coupled to a CCD camera, and a total of 48 samples from four brands of lemon-type soft drinks were analyzed. A calibration curve using sucrose from refined sugar (sugarcane) diluted in spring water was elaborated in the range between 0 and 15.0 g/100 ml, and a quantification model based on Partial Least Squares (PLS) regression was developed to correlate the Raman spectra and the amount of sucrose in each dilution. Then, the sucrose in each soft drink sample was predicted employing the calibration curve. The mean error of calibration for the PLS method was 0.30 g/100 ml (3.0%). Results indicated that soft drinks samples have predicted sugar content ranging from 8.1 to 10.9 g/100 ml, with an error of the predicted value compared to the nutritional table ranged from 1.1% to 5.5%. Therefore, Raman spectroscopy in association with PLS regression was an effective method for quantifying the sucrose, with small prediction error. Thus, the present work allows to infer auspicious possibilities of Raman spectroscopy application in the quantification of relevant nutritional facts in beverages.
VaxcineTM: an oil-based adjuvant for influenza vaccines
Alves, Rosely Cabette Barbosa;New, Roger Randal Charles;Andrade, Gabrielle Ribeiro;Mendon？a, Rita Maria Zucatelli;Sant'Anna, Osvaldo Augusto Brasil Esteves;Mancini, Dalva Assun？？o Portari;Silva-Junior, Silvio Marciano da;Domingos, Marta de Oliveira;
Memórias do Instituto Oswaldo Cruz , 2011, DOI: 10.1590/S0074-02762011000800026
Abstract: vaccination is the method of choice for the prevention of influenza infection. however, the quantity of the antigen available, especially in the case of pandemics, often fails to meet the global demand. however, improved adjuvants can overcome this problem. preliminary results obtained in this study revealed that one year after a single subcutaneous immunisation with influenza a h3n2 virus in an oil-based carrier, vaxcinetm, outbreed mice produced a high immunoglobulin g response that lasted for up to one year and exhibited less variation in titre compared with the response of the control group treated with alum. the haemagglutination-inhibition titres induced by vaxcinetm were also higher than those generated by alum. these data indicate that vaxcinetm is a good adjuvant candidate for seasonal influenza vaccines.
Negocia？？es sociais para melhoria das condi？？es de trabalho no setor de teleatendimento: o descompasso entre a posi？？o das empresas e a realidade do trabalho
Silva, Airton Marinho;Assun？？o, Ada ávila;
Interface - Comunica？？o, Saúde, Educa？？o , 2005, DOI: 10.1590/S1414-32832005000300007
Abstract: this article studies the interaction between telemarketing companies, government bodies concerned with worker health (assisted by university researchers) and a union of telephone operators. it reveals a gap between the measures companies take to face their workers' health problems and the reality of this work. using the statements of these actors in a public prosecution service inquiry on labor, as well as the results of bibliographic research on telemarketing operators falling ill, we studied the position adopted by companies vis-à-vis the risks associated with telemarketing work. we concluded, based on the companies' declarations, that they adopt a position of denial of the risk factors that cause telemarketing operators to fall ill, while confronting the government's labor protection requirements, which evidences the insufficiency of the workers' actions and the limitations of government power in this field.
Effects of spin on the dynamics of the 2D Dirac oscillator in the magnetic cosmic string background
Fabiano M. Andrade,Edilberto O. Silva
Physics , 2014, DOI: 10.1140/epjc/s10052-014-3187-6
Abstract: In this work the dynamics of a 2D Dirac oscillator in the spacetime of a magnetic cosmic string is considered. It is shown that earlier approaches to this problem have neglected a $\delta$ function contribution to the full Hamiltonian, which comes from the Zeeman interaction. The inclusion of spin effects leads to results which confirm a modified dynamics. Based on the self-adjoint extension method, we determined the most relevant physical quantities, such as energy spectrum, wave functions and the self-adjoint extension parameter by applying boundary conditions allowed by the system.
Remarks on the Dirac oscillator in $(2+1)$ dimensions
Fabiano M. Andrade,Edilberto O. Silva
Physics , 2014, DOI: 10.1209/0295-5075/108/30003
Abstract: In this work the Dirac oscillator in $(2+1)$ dimensions is considered. We solve the problem in polar coordinates and discuss the dependence of the energy spectrum on the spin parameter $s$ and angular momentum quantum number $m$. Contrary to earlier attempts, we show that the degeneracy of the energy spectrum can occur for all possible values of $sm$. In an additional analysis, we also show that an isolated bound state solution, excluded from Sturm-Liouville problem, exists.
The 2D $κ$-Dirac oscillator
Fabiano M. Andrade,Edilberto O. Silva
Physics , 2014, DOI: 10.1016/j.physletb.2014.09.017
Abstract: In this Letter, 2D Dirac oscillator in the quantum deformed framework generated by the $\kappa$-Poincar\'{e}-Hopf algebra is considered. The problem is formulated using the $\kappa$-deformed Dirac equation. The resulting theory reveals that the energies and wave functions of the oscillator are modified by the deformation parameter.
Page 1 /161893
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.