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Search Results: 1 - 10 of 212424 matches for " Adriane L. Brito "
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Projecting Extreme Changes in Summer Rainfall in South America by the Middle of the 21st Century  [PDF]
Paula Andrea M. Fonseca, José Augusto P. Veiga, Francis Wagner S. Correia, Adriane L. Brito, M?nica R. Queiroz, André A. Lyra, Sin Chan Chou
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.44067
Abstract:

Extreme rainfall events can be considered a natural manifestation of the environment in which they are embedded and foreknowledge about their future behavior is very important, especially for decision makers. In this context, we aimed to explore the future behavior of extreme rainfall intensity through numerical simulations with the ETA model. The model was forced with a scenario of high greenhouse gas emissions for the middle of the 21st Century as described for A1B emission scenario. We detailed the main changes in accumulated rainfall produced by heavy events, very heavy events and rare events over a broad area of South America with a focus on the tropical sector. The methodology applied here is capable of separating extreme events and establishing the quantity of rainfall yielded by them. We have found that in the near future (2041-2050) rare events will tend to increase over the Amazon basin, followed by reductions in heavy and very heavy events. Conversely, heavy, very heavy and rare events are expected to decline over north-east Brazil. Furthermore, increases were found for heavy, very heavy and rare events over southern Brazil.

Extreme Rainfall Events over the Amazon Basin Produce Significant Quantities of Rain Relative to the Rainfall Climatology  [PDF]
Adriane Lima Brito, José Augusto Paix?o Veiga, Marcos Cezar Yoshida
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.42021
Abstract:

Although much effort has been made to characterize and understand extreme rainfall’s causes and effects, little is known about their frequency and intensity. Moreover, knowledge about their contribution to the total rainfall climatology is still minimal, especially over the Amazon where rainfall data are very scarce. In this paper we propose to classify extreme rainfall events by type and analyze their frequency and intensity over South America with a focus on the Amazon basin. Gridded daily data from the MERGE/CPTEC product over a period of 15 years (1998–2013) was used. An adaptation of Rx5d climate index was applied to select different kinds of extreme rainfall for the purpose of quantifying their frequency and intensity as well as their contribution to the accumulated rainfall climatology. According to the results, all kinds of extreme rainfall events can be observed over the studied area. However, the quantity of rainfall produced by each type is different, and consequently their percent contributions to the total accumulated rainfall climatology also differ. For example: in the Amazon region EET-I is responsible for 15% - 40% of the total accumulated rainfall. Moreover, in the Brazilian northeast there are regions where EET-I exceeds 40% of the total rainfall. In northeast Brazil EET-II is responsible up to 30% of the total accumulated rainfall. EET-III is responsible for 5% - 15% in the Amazon basin, 25% - 45% in northeast Brazil and 10% - 45% over Roraima State. Area-mean time variation shows that the quantity of rainfall extremes over the Amazon basin was reduced during the El Nino years of 2002, 2005, 2007 and 2010, while during the La Ni?a episodes of 1999, 2008

Maxillofacial sarcomas: a ugandan epidemiological survey  [PDF]
Kamulegeya Adriane
Open Journal of Stomatology (OJST) , 2011, DOI: 10.4236/ojst.2011.12009
Abstract: We reviewed the case notes of 203 patients who were treated for sarcomas of the oral and maxillofacial region over a period of 5 years. There were 98 male cases (mean age 31.4 ± 12.8 years) and 105 female cases (mean age 29.3 ± 10.4). Kaposi’s sarcoma accounted for 82.8% cases, and rhabdomyosarcoma 6.9% followed by osteosarcoma and chondrosarcoma at 2.5% each. Except for Kaposi’s sarcoma, surgery in combination with radiotherapy and/or chemothe- rapy was the main stay of treatment. Survival data was not available for most of our patients.
Microbial biomass and enzyme activity of a Cerrado Oxisol under agroecological production system
Ferreira, Enderson Petr?nio de Brito;Wendland, Adriane;Didonet, Agostinho Dirceu;
Bragantia , 2011, DOI: 10.1590/S0006-87052011000400024
Abstract: aiming to evaluate the effects of soil management and cover crops on microbial indicators of soil quality, an experiment was carried out under field conditions in which common bean and corn were cropped under no-tillage (nt) and conventional tillage (ct) after sunnhemp, velvet bean, pigeon pea, jack bean, sorghum and fallow (weeds). the basal soil respiration (bsr), c and n of the microbial biomass (cmic and nmic), metabolic quotient (qco2), total enzymatic activity (tea), β-glycosidase (β-ga) activity and acid phosphatase activity (apa) were evaluated in samples collected in 0-0.10 m depth. cmic, qco2, tea, β-ga and apa were more sensitive in determining the effects caused by tillage and cover crops. although the cover crops had not provided a remarkably influence on the studied indicators, in general, the highest values of cmic, nmic, bsr, tea, β-ga and apa and the lowest values of qco2 were observed under nt compared to ct. cmic and tea values were 35% and 13% higher under nt when compared to ct, respectively. in addition, nt showed values closer to those found under "cerrado" area for the studied parameters, indicating a greater sustainability under this soil management system compared to ct management.
Central activities of Pimenta pseudocaryophyllus (Gomes) L.R. Landrum
James Oluwagbamigbe FAJEMIROYE,José Luís Rodrigues MARTINS,Adriane Ferreira de BRITO,Pablinny Moreira GALDINO
International Journal of Medicinal and Aromatic Plants , 2012,
Abstract: Folkloric medicinal application of Pimenta pseudocaryophyllus popularly known as “craveiro” as calming agent is a commonplace in Campos do Jord o, SP, Brazil. Pharmacological screening of ethanolic leaf extract of Pimenta pseudocaryophyllus (EEPp) and its active fraction (s) for possible anxiolytic like effect became necessary in order to confirm its therapeutic claims by the populace. Preliminary investigation with oral administration of EEPp (0.5, 1.0 and 2.0 g/kg) was devoid of any sign of neurotoxicity. In barbiturate induced – hypnosis, EEPp 1.0 g/kg potentiated the pentobarbital-induced sleep (32% reduction in sleep latency and 20% increase in sleep duration) while only dichloromethane and aqueous fractions increases sleep duration. Based on the parameters evaluated in both the open field and light dark box models, only dichloromethane fraction among others showed consistent anxiolytic like effect.
Presencia del tiburón martillo Sphyrna zygaena (Carchariniformes: Sphyrnidae) y nuevo registro del tiburón espinudo Echinorhinus cookei (Squaliformes: Squalidae) en San Antonio, Chile central
Brito,José L.;
Investigaciones marinas , 2004, DOI: 10.4067/S0717-71782004000200014
Abstract: the sighting of sphyrna zygaena (linnaeus, 1758) based on the capture of a specimen in the bay of san antonio (33°35's) and a specimen of echinorhinus cookei pietschmann, 1928 captured to the west of the coast of santo domingo (33°35's). the former case, the known geographic distribution is increased from region to the north to san antonio, in central chile and in the alter, a fifth sighting is noted for the species in chilean waters, confirming its presence in the central region of chile
Nuevos registros de Balistes polylepis (Balistidae), Sphoeroides lobatus (Tetraodontidae), Mola mola y M. ramsayi (Molidae) en San Antonio, Chile (Pisces, Tetraodontiformes)
Brito,José L.;
Investigaciones marinas , 2003, DOI: 10.4067/S0717-71782003000100008
Abstract: the finding of three specimens of balistes polylepis steindachner, 1876, in san antonio (33o35`s), santo domingo (33o37`s) and cartagena (33o32`s) and one specimen of sphoeroides lobatus steindachner, 1870 in matanza (33o58`s) and one specimen of mola mola linnaeus, 1758 and three specimens of m. ramsayi (giglioli, 1833), to the west of las cruces (33o31`s) increases the known geographic distribution for these species from northern chile to central chile. their presence is associated to el ni?o phenomena of 1982-1983 and 1997-1998
Hallazgo de Somniosus pacificus Bigelow & Schroeder, 1944 (Squaliformes: Squalidae) en San Antonio, Chile central
Brito,José L.;
Investigaciones marinas , 2004, DOI: 10.4067/S0717-71782004000200013
Abstract: the finding of a male somniosus pacificus, beached in the san antonio bay (33°35's) is hereby reported. this record confirm of its presence in central chile and is the second record for the genus in chilean waters
Ferritas Ni-Zn: breve revis?o sobre o processo convencional de fabrica??o e as propriedades permeabilidade magnética e constante dielétrica
Brito, V. L. O.;
Ceramica , 2006, DOI: 10.1590/S0366-69132006000400002
Abstract: ni-zn ferrites are magnetic ceramics that have been widely used on the fabrication of electrical and electronic components. such materials have been studied for many years by several researchers and their magnetic and electrical properties have been assessed in relation to many factors, such as chemical composition, fabrication methods, and microstructure. this work makes a review of the main factors influencing the properties of ni-zn ferrites. it is emphasized the magnetic permeability and dielectric constant, as well as the characteristics of the conventional ceramic method on the fabrication of these ferrites.
Nuevos registros de Balistes polylepis (Balistidae), Sphoeroides lobatus (Tetraodontidae), Mola mola y M. ramsayi (Molidae) en San Antonio, Chile (Pisces, Tetraodontiformes) New records of Balistes polylepis (Balistidae), Sphoeroides lobatus (Tetraodontidae), Mola mola and M. ramsayi (Molidae) from San Antonio, Chile (Pisces, Tetraodontiformes)
José L. Brito
Investigaciones Marinas , 2003,
Abstract: El hallazgo de tres ejemplares de Balistes polylepis Steindachner, 1876; un ejemplar de Sphoeroides lobatus Steindachner, 1870 y un ejemplar de Mola mola Linnaeus, 1758, en la costa de San Antonio y tres ejemplares de M. ramsayi (Giglioli, 1833), permite aumentar la distribución geográfica conocida de estas especies desde el norte hasta la costa central de Chile. La presencia de estas especies está asociada con los efectos de los fenómenos El Ni o 1982-83 y 1997-98 The finding of three specimens of Balistes polylepis Steindachner, 1876, in San Antonio (33o35`S), Santo Domingo (33o37`S) and Cartagena (33o32`S) and one specimen of Sphoeroides lobatus Steindachner, 1870 in Matanza (33o58`S) and one specimen of Mola mola Linnaeus, 1758 and three specimens of M. ramsayi (Giglioli, 1833), to the west of Las Cruces (33o31`S) increases the known geographic distribution for these species from northern Chile to central Chile. Their presence is associated to El Ni o phenomena of 1982-1983 and 1997-1998
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