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Search Results: 1 - 10 of 223419 matches for " Luiz P Figueiredo "
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Pyrolysis Oil from the Fruit and Cake of Jatropha curcas Produced Using a Low Temperature Conversion (LTC) Process: Analysis of a Pyrolysis Oil-Diesel Blend  [PDF]
Monique Kort-Kamp Figueiredo, Gilberto Alves Romeiro, Raquel Vieira Santana Silva, Priscila Alvares Pinto, Raimundo Nonato Damasceno, Luiz Antonio d`Avila, Amanda P. Franco
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.33041
Abstract: Background: The LTC process is a technique that consists of heating solid residues at a temperature of 380oC - 420oC in an inert atmosphere and their products are evaluated individually: these products include pyrolysis oil, pyrolytic char, gas and water. The objective of this study was to compare the effects of the use of oils obtained by pyrolysis of Jatropha curcas as an additive for diesel in different proportions. Results: A Low Temperature Conversion (LTC) process carried out on samples of Jatropha curcas fruit and generated pyrolysis oil, pyrolyic char, gas and aqueous fractions in relative amounts of 23, 37, 16 and 14% [w/w] respectively for Jatropha curcas fruit and 19, 47, 12 and 22% [w/w] respectively for Jatropha curcas cake. The oil fractions were analyzed by FTIR, 1H NMR, 13C NMR, GCMS and physicochemical analysis. The pyrolysis oil was added to final concentrations of 2, 5, 10 and 20% [w/w] to commercial diesel fuel. The density, viscosity, sulfur content and flash point of the mixtures were determined. Conclusions: The results indicated that the addition of the pyrolysis oil maintained the mixtures within the standards of the diesel directive, National Petroleum Agency (ANP no 15, of 19. 7. 2006), with the exception of the viscosity of the mixtures containing 20% pyrolysis oil.
Review on Infections of the Central Nervous System by St. Louis Encephalitis, Rocio and West Nile Flaviviruses in Brazil, 2004-2014  [PDF]
Mario Luis Garcia de Figueiredo, Luiz Tadeu Moraes Figueiredo
Advances in Microbiology (AiM) , 2014, DOI: 10.4236/aim.2014.413106
Abstract: Rocio (ROCV), Saint Louis encephalitis (SLEV) and West Nile (WNV) are Flavivirus (Flaviviridae) probably carried by birds and transmitted by Culex mosquitoes. We show here a review on infections of the central nervous system by St. Louis Encephalitis, Rocio and West Nile Flaviviruses in Brazil, 2004-2014. In the last 10 years, serologic surveys in horses showed high proportions of seropositive animals which point out that SLEV and ROCV have circulated infecting horses in west-central, southeast and other regions of Brazil and that WNV has been introduced into Brazil and circulates mostly in Pantanal region. However humans infected by WNV have not been reported. In the State of Sao Paulo: SLEV was isolated from a case clinically diagnosed as dengue in 2004; in 2006, 6 SLEV patients including 3 cases of menigoencephalitis were reported in the middle of a large epidemic of dengue type 3; and in 2008, 1 patient with acute febrile illness that was IgM-positive for dengue was found infected by SLEV by detection of the virus genome. In 2010, ROCV genome was detected in the cerebrospinal fluids of 2 patients from the northern region with meningoenchephalitis and also AIDS. This was the first report of infections by ROCV in the last 34 years and curiously, it occured more than 2000 km from where the virus was firstly found. It is necessary to improve the surveillance of SLEV, ROCV and WNV in Brazil.
Jatobal virus antigenic characterization by ELISA and neutralization test using EIA as indicator, on tissue culture
Figueiredo, Luiz Tadeu M.;Rosa, Amélia P. A. Travassos da;
Memórias do Instituto Oswaldo Cruz , 1988, DOI: 10.1590/S0074-02761988000200003
Abstract: a virus antigenic characterization methodology using an indirect method of antibody detection elisa with virus-infected cultured cells as antigen and a micro virus neutralisation test using eia (nt-eia) as an aid to reading were used for antigenic characterization of jatobal (bean 423380). jatobal virus was characterized as a bunyaviridae, bunyavirus genus, simbu serogroup virus. elisa using infected cultured cells as antigen is a sensitive and reliable method for identification of viruses and has many advantages over conventional antibody capture elisa's and other tests: it eliminates solid phase coating with virus and laborious antigen preparation; it permits screening of large numbers of virus antisera faster and more easily than by cf, hai, or plaque reduction nt. elisa and nt using eia as an aid to reading can be applicable to viruses which do not produce cytopathogenic effect. both techniques are applicable to identification of viruses which grow in mosquito cells.
Intensidade-dura??o-frequência de chuvas para o Estado de Mato Grosso do Sul
Santos, Glenio G.;Figueiredo, Cícero C. de;Oliveira, Luiz F. C. de;Griebeler, Nori P.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2009, DOI: 10.1590/S1415-43662009000700012
Abstract: rain intensity data are necessary to increase security of hydraulic projects. the objective of this study was to determine the rain storm equations and the spatial distribution of rain intensity for the state of mato grosso do sul, brazil. the equations were obtained by disaggregation of 24 h rain data from 109 pluviometric stations available in the national water agency (ana) data bank. these equations resulted in coefficients of determination above 0,99 for all localities. the adjusted parameters showed high variability, resulting from different rain intensities in different places of the state. the interpolation of data allowed good visualization of the differences, evidencing higher intensities of rains in the central and northern regions and lower intensities in the southeastern and southwestern regions of the state. these results demonstrated the importance of intensity-duration-frequency relationship and its use for studies and hydraulic projects based on data from each place.
Níveis de anticorpos para arbovírus em indivíduos da regi?o de Ribeir?o Preto, SP (Brasil)
Figueiredo,Luiz Tadeu Moraes; Rosa,Amélia P.A. Travassos da; Fiorillo,Adhemar Mário;
Revista de Saúde Pública , 1986, DOI: 10.1590/S0034-89101986000300003
Abstract: the area of ribeir?o preto is located in the north of s.paulo state - brazil. the population is 611,742. the climate is sub-tropical warm and humid. the area of ribeir?o preto is almost completely deforested and covered by extensive plantations of sugar cane and coffee and pasture. with the purpose of discovering the arbovirus antibody levels, a serologic survey was carried out among people of the ribeir?o preto area living in different geographical environments. fifty two inhabitants located close to natural landscap, 38 in places with landscape modified by agriculture and cattle raising, and 93 in urban communities were studied. serologic tests for hemagglutination inhibition by 20 togaviridae and bunyaviridae arbovirus, and neutralization and complement fixation tests on piry rhabdoviridae were carried out. it was discovered that 19.9% of the sample population presented antibodies against arbovirus. the flavivirus togaviridae antibodies were the most frequent among inhabitants from urban communities (8.5%). anti amarilic vaccination, carried out 8 years ago, explains this fact. piry rhabdoviridae obtained 12.5%, the most significant population in proportion of antibodies detected. thirty two percent of inhabitants in a place close to natural landscape, 11.5% of inhabitants in places with landscape modified by agriculture and cattle raising, and 7,5% of inhabitants in urban communities presented piry antibodies. this virus has never before been discovered in the south of brazil. the highest risk of infection by piry virus was found in men, especially older than forty: agricultural workers, forestry wardens and river workers. these conclusions are typical of a virus related to a natural environment. geographical space is changeable, and organized according to the characteristics of a civilization at a particular point in time. the geographical space approach is more advantageous than a purely ecological view on zoonoses research in populated and organized areas in
Compara??o eletromiográfica do exercício abdominal dentro e fora da água
Müller,Evelyn S. M.; Black,Gabriela L.; Figueiredo,Paulo P.; Kruel,Luiz F. M.; Hanisch,Claudia; Appell,Hans J.;
Revista Portuguesa de Ciências do Desporto , 2005,
Abstract: the electric activity of the obliqus externus abdominis, rectus femoris and the upper and lower portions of the rectus abdominis muscles were monitored during the "sit up" exercise in two different conditions land and water. twenty women aged 21-29 year were studied. the electric activity was measured with surface electrodes. the value root mean square (rms) of the ascending phase of this exercise was used for the normalization of the signal amplitude that was collected during the other variations of speed and conditions. the exercise was performed in a standard rhythm and at maximum speed. for each muscle, anova was used for the factors phase, speed, and condition. the shapiro-wilk test of normality was applied. when the exercise was performed at maximum speed, the observed emg activity was stronger than at standard speed, both in water and on land. the emg activity of the rectus femoris at maximum speed in water was lower than on land. when analyzing the ascending phase in water at maximum speed, the abdominal muscles showed as much as emg on land. these results demonstrate that the instability of the horizontal position and the resistance against the movement compensate the reduction of the weight by the effect hydrostatic pressure when the exercise is executed at maximum speed. the same pattern did not occur at standard speed.
Pneumonias virais: aspectos epidemiológicos, clínicos, fisiopatológicos e tratamento
Figueiredo, Luiz Tadeu Moraes;
Jornal Brasileiro de Pneumologia , 2009, DOI: 10.1590/S1806-37132009000900012
Abstract: in humans, the most common types of infection are respiratory tract infections, among which viral infections predominate. viruses can also infect the low respiratory tract, causing bronchiolitis, bronchitis and pneumonia. the objective of this review article was to show epidemiological, pathophysiological, clinical and therapeutic aspects of viral community-acquired pneumonia. these types of pneumonia are commonly caused by influenza a and b; parainfluenza 1, 2 and 3; respiratory syncytial virus; or adenovirus. we also address the types of pneumonia caused by hantaviruses, metapneumoviruses and rhinoviruses.
Emergent arboviruses in Brazil
Figueiredo, Luiz Tadeu Moraes;
Revista da Sociedade Brasileira de Medicina Tropical , 2007, DOI: 10.1590/S0037-86822007000200016
Abstract: brazil is a large tropical country (8,514,215km2) with 185,360,000 inhabitants. more than one third of its territory is covered by tropical forests or other natural ecosystems. these provide ideal conditions for the existence of many arboviruses, which are maintained in a large variety of zoonotic cycles. the risk that new arboviruses might emerge in brazil is related to the existence of large, densely populated cities that are infested by mosquitoes such as culex and the highly anthropophilic aedes aegypti. infected humans or animals may come into these cities from ecological-epidemiological settings where arbovirus zoonoses occur. this study analyzes the risk of emergence of the alphaviruses mayaro, venezuelan equine encephalitis, eastern equine encephalitis and chikungunya; the flaviviruses yellow fever, rocio, saint louis encephalitis and west nile; and the orthobunyavirus oropouche.
Febres hemorrágicas por vírus no Brasil
Figueiredo, Luiz Tadeu Moraes;
Revista da Sociedade Brasileira de Medicina Tropical , 2006, DOI: 10.1590/S0037-86822006000200014
Abstract: to call atention to viral hemorrhagic fevers, diseases that are mostly underdivulged and, probably, undereported, we present here case reports of the 4 diseases of this kind that occur in brazil: yellow fever, dengue haemorrhagic fever/dengue shock syndrome, arenavirus haemorrhagic fever and hantavirus cardiopulmonary syndrome. relevant clinical, epidemiological and laboratorial diagnostic aspects of these viral haemorrhagic fevers are also shown here. these diseases have a high case fatality rate, induce capillary leaking and blood coagulation disturbances that are evidenced by hemoconcentrantion and thrombocytopenia. an early clinical diagnosis and treatment is fundamental for patient survival.
Considera es a respeito da Escrava Isaura
Luiz Antonio de Figueiredo
Alfa : Revista de Linguística , 2001,
Abstract:
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