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Search Results: 1 - 10 of 634127 matches for " Adriana de F. M. Oliveira "
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Obstru o e uniformidade de aplica o em sistemas de irriga o por gotejamento aplicando-se efluente da suinocultura Clogging and uniformity of application in drip irrigation systems operating with swine wastewater
Rafael O. Batista,Rubens A. Oliveira,Delfran B. dos Santos,Adriana de F. M. Oliveira
Revista Brasileira de Engenharia Agrícola e Ambiental , 2013,
Abstract: Neste trabalho buscou-se analisar o efeito de diferentes manejos de água residuária de suinocultura e de água de abastecimento na obstru o de emissores e na uniformidade de aplica o de sistemas de irriga o por gotejamento. O experimento foi realizado na Universidade Federal de Vi osa (UFV) e montado em esquema de parcelas subsubdivididas tendo, nas parcelas, os manejos (1E3A - uma hora de aplica o de efluente mais três horas de aplica o de água limpa, 2E2A - duas horas de aplica o de efluente mais duas horas de aplica o de água limpa, 3E1A - três horas de aplica o de efluente mais uma hora de aplica o de água limpa e 4E - quatro horas de aplica o de efluente), nas subparcelas os tipos de gotejador (G1, G2 e G3) e, nas subsubparcelas, os tempos das avalia es (0, 20, 40, 60, 80, 100, 120, 140 e 160 h) em delineamento inteiramente casualizado com três repeti es. Os resultados obtidos indicaram que na água residuária de suinocultura as características sólidos suspensos, ferro total e popula o bacteriana, representaram risco severo de entupimento de gotejadores e que houve redu o elevada da uniformidade de aplica o de efluente quando o tempo de aplica o de água residuária foi igual ou superior ao da água de abastecimento. This study aimed to evaluate the effect of different managments of swine wastewater and clean water on clogging of emitters and application uniformity of drip irrigation systems. The experiment was conducted in the experimental area of the Federal University of Vi osa (UFV) and mounted in a split split-plots, having in the plots the managments (1E3A - one hour of application of effluent and three hours of application of clean water, 2E2A - two hours of application of effluent and two hours of application of clean water, 3E1A - three hours of application of effluent and one hour of application of clean water and 4E - four hours of application of effluent), in the subplots the types of drippers (G1, G2 and G3) and in the subsubplots the evaluation times (0, 20, 40, 60, 80, 100, 120, 140 and 160 h) in a completely randomized design with three replications. The results indicated that in the swine wastewater the characteristics suspended solids, total iron and bacterial population represented severe risk of clogging of drippers; and that there was a high reduction of the uniformity of application of effluent when the time of application of wastewater is equal to or greater than the water supply.
Os histricomorfos sul-americanos: uma análise comparativa do desenvolvimento embriológico
Franciolli, André Luis Rezende;Ambrósio, Carlos E;Oliveira, Moacir F. de;Morini, Adriana C;Favaron, Phelipe O;Machado, Márcia Rita F;Miglino, Maria Angélica;
Pesquisa Veterinária Brasileira , 2011, DOI: 10.1590/S0100-736X2011000500012
Abstract: the aim of this study was to perform an embryology analysis of south-american hystricomorph rodents (paca, agouti, capybara, and rock cavy) to compare these data with the ones from other rodents and with the human embryologic morphogenesis. we used 8 samples of rodents, 2 embryos for each species, collected during early gestation. the embryos were removed from the pregnant uterus through partial ovarysalpingohysterectomy, followed by fixation in 4% paraformaldehyde solution. for crow-rump measurements, we had as reference the nuchal crest at one extremity and the last sacral vertebra on the opposite side. the embryos examined showed the following morphological characteristics: division of the branchial arches, the cranial neuropore open in some embryos studied, the cranial curvature developed, and the somites delimited and distinct. the hindlimb and forelimb were in development, and showed "row" form; so we found the cardiac impression and the liver region. in the caudal region we observed the head-flow curve, the optic vesicle with and without pigmentation of the retina, the opening of neural tube in the fourth ventricle region of the brain, the nasal cavity, and the encephalic vesicles formation. we conclude that the embryo development of hystricomorph rodents can be compared with the morphogenesis in rats, guinea pigs, rabbits and humans in the early stages of development, being aware of the particularities for each species, in addition to the implementation of reproductive technology, especially of embryos, what requires knowledge of the pre-implantation stages for the different development phases.
Produtividade da batata-doce em fun??o de doses de K2O em solo arenoso
Brito, Carlos Henrique de;Oliveira, Ademar P de;Alves, Adriana Ursulino;Dorneles, Carina S M;Santos, Jo?o F dos;Nóbrega, José P R;
Horticultura Brasileira , 2006, DOI: 10.1590/S0102-05362006000300010
Abstract: the response of sweet potato rainha branca cv., cultivated under different k2o levels was evaluated. the experiment was carried out in randomized blocks design with four replications in a quartz psamment soil at universidade federal da paraíba, paraiba state, brazil, from july to november/2004. the k2o levels applied were 0; 50; 100; 150; 200 and 250 kg ha-1). the plots consisted of 48 plants, spaced of 0.80x0.30 m. the maximum estimated values, 14.8 and 8.4 t ha-1 of total and commercial roots yield, were obtained with 194 and 174 kg ha-1 of k2o, respectively. however, the most economic level of commercial roots yield (6.0 t ha-1) was reached using 163 kg ha-1 of k2o. the k2o levels resulting in maximum roots yield and economic return, were correlated respectively with 125 and 121 mg dm-3 of available k with mehlich 1 extractor. the probability for sweet potato response under potassic fertilization in similar soils will be minimized if the level of available k in the soil were superior to 121 mg dm-3. for utilized soil in this study, 163 kg ha-1 of k2o can be recommended for sweet potato fertilization.
Placentation in Sigmodontinae: a rodent taxon native to South America
Phelipe O Favaron, Anthony M Carter, Carlos E Ambrósio, Adriana C Morini, Andrea M Mess, Moacir F de Oliveira, Maria A Miglino
Reproductive Biology and Endocrinology , 2011, DOI: 10.1186/1477-7827-9-55
Abstract: Placentas of various gestational ages ranging from early pregnancy to near term were obtained for five genera, i.e. Necromys, Euryoryzomys, Cerradomys, Hylaeamys, and Oligoryzomys. They were investigated by means of histology, immunohistochemistry, a proliferation marker, DBA-lectin staining and transmission electron microscopy.The chorioallantoic placenta was organized in a labyrinthine zone, spongy zone and decidua and an inverted yolk sac persisted until term. The chorioallantoic placenta was hemotrichorial. The interhemal barrier comprised fetal capillary endothelium and three layers of trophoblast, an outermost, cellular layer and two syncytial ones, with interspersed trophoblast giant cells (TGC). In addition, accumulations of TGC occurred below Reichert's membrane. The junctional zone contained syncytial trophoblast, proliferative cellular trophoblast, glycogen cells and TGC that were situated near to the maternal blood channels. In three of the genera, TGC were also accumulated in distinct areas at the placental periphery. PAS-positive glycogen cells derived from the junctional zone invaded the decidua. Abundant maternal uNK cells with positive response to PAS, vimentin and DBA-lectin were found in the decidua. The visceral yolk sac was completely inverted and villous.The general aspect of the fetal membranes in Sigmodontinae resembled that found in other cricetid rodents. Compared to murid rodents there were larger numbers of giant cells and in some genera these were seen to congregate at the periphery of the placental disk. Glycogen cells were found to invade the decidua but we did not identify trophoblast in the walls of the deeper decidual arteries. In contrast these vessels were surrounded by large numbers of uNK cells. This survey of wild-trapped specimens from five genera is a useful starting point for the study of placentation in an important subfamily of South American rodents. We note, however, that some of these rodents can be captive bred and rec
Report a possible correlation between necrotizing ulcerative gingivitis and mononucleosis
Francinne Miranda,Rosa; Jou,Adriana; Vieira de Miranda,Fábio; Varvaki Rados,Pantelis; Oliveira Gaiger,Márcia; Chaves Cecília Moraes,Anna;
Revista Cubana de Estomatolog?-a , 2011,
Abstract: necrotizing ulcerative gingivitis is a relatively uncommon periodontal disease, characterized by ulceration, necrosis, pain and gingival bleeding. factors often related to its occurrence include stress and systemic viral infections, such as those caused by cytomegalovirus and epstein-barr virus type 1, the latter being also considered the causative agent of infectious mononucleosis. this article aims to describe a clinical case of a female patient who presented with necrotizing ulcerative gingivitis associated with a clinical picture of infectious mononucleosis, as well as to review the literature concerning a possible correlation between these pathologies. this patient presented to our health care facility with necrotizing ulcerative gingivitis accompanied by lymphadenopathy, fever and prostration, after laboratory tests, epstein-barr virus type 1 infection was confirmed, as well as the co-occurrence of pathologies: necrotizing ulcerative gingivitis and infectious mononucleosis. symptom remission in both disorders also occurred concomitantly, after instruction in plaque control measures and palliative medication for control of systemic symptoms. therefore, although there is no scientific validation of an association between these two pathologies, it is imperative that all diagnostic alternatives be considered and investigated, in order to establish the therapeutic approach most appropriate to the patient.
Likely transmission of hepatitis C virus through sharing of cutting and perforating instruments in blood donors in the State of Pará, Northern Brazil
Oliveira-Filho, Aldemir Branco de;Pimenta, Adriana do Socorro Coelho;Rojas, Márcia de Fátima Maciel;Chagas, Márcia Cristina Munhoz;Crespo, Deborah Maia;Crescente, José ?ngelo Barletta;Lemos, José Alexandre Rodrigues de;
Cadernos de Saúde Pública , 2010, DOI: 10.1590/S0102-311X2010000400025
Abstract: we determined the risk factors for hcv infection in blood donors in the state of pará, northern brazil. we examined 256 blood donors seen at the blood bank of pará state between 2004 and 2006. they were divided into two groups, depending on whether they were infected with hcv or not; 116 donors were infected with hcv, while the other 140 were free of infection. the hcv-rna was detected by real-time pcr. all of the participants filled out a questionnaire about possible risk factors. the data were evaluated using simple and multiple logistic regressions. the main risk factors for hcv were found to be use of needles and syringes sterilized at home (or = 4.55), invasive dental treatment (or = 3.08), shared use of razors at home (or = 1.99), sharing of disposable razors in barbershops, beauty salons, etc. (or = 2.34), and sharing manicure and pedicure material (or = 3.45). local and regional health authorities should educate the public about sharing perforating and cutting materials at home, in barber/beauty shops, and in dental clinics as risk factors for hcv infection.
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters
Oliveira, Thiago M. B. F.;Ribeiro, Francisco W. P.;do Nascimento, Jefferson M.;Soares, Janete E. S.;Freire, Valder N.;Becker, Helena;Lima-Neto, Pedro de;Correia, Adriana N.;
Journal of the Brazilian Chemical Society , 2012, DOI: 10.1590/S0103-50532012000100016
Abstract: this paper describes an electroanalytical methodology using square-wave adsorptive voltammetry, which has been successfully applied for the direct determination of dexamethasone residues in raw natural waters used for the public supply of the ceará state, brazil. the obtained detection limits ranged from 7.47 × 10-9 to 1.80 × 10-8 mol l-1 for the three matrices of raw natural waters evaluated. high percentages of average recovery (98.86% ± 0.72), repeatability (0.32% ± 0.05) and reproducibility (0.91% ± 0.20) were obtained in these samples, reaffirming the sensitivity of the procedure. energy of the lumo orbitals and mülliken’s atomic charges were calculated using the functional blyp/dnp. the theoretical results allied to the diagnostic criteria of the square-wave voltammetry indicate that the dexamethasone redox mechanism is associated to the quasi-reversible and irreversible reduction process of the ketone groups located at c-20 and c-3, respectively.
Síntese, caracteriza??o e estudo da atividade inibitória de novas dialquilfosforilarilidrazonas sobre o crescimento de tripanossomatídeos
Nogueira, Andréa Janaina M.;Lima, Marco Edilson F. de;DaCosta, Jo?o Batista N.;Alves, Eliomara Sousa Sobral;Anjos, Danielle Oliveira dos;Vannier-Santos, Marcos André;Lanfredi-Rangel, Adriana;
Química Nova , 2011, DOI: 10.1590/S0100-40422011000800013
Abstract: a new series of dialkylphosphorylhydrazones was synthesized through the condensation of aromatic aldehydes with different phosphorylhydrazines. all synthesized compounds were characterized by ir, 1h-nmr, 13c-nmr and 31p-nmr spectroscopies. the in vitro investigation of the activity of these compounds against leishmania amazonensis promastigotes and epimastigotes of t. cruzi, showed an efficient inhibition of proliferation, at non toxic concentrations to mammalian cells. the results have shown some derivatives as potential antiparasitic agents against trypanosomatids.
Effects of Sea Level Variation on Biological and Chemical Concentrations in a Coastal Upwelling Ecosystem  [PDF]
Marilia M. F. de Oliveira, Gilberto C. Pereira, Jorge L. F. de Oliveira, Nelson F. F. Ebecken
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.411A008

Oscillations in sea level due to meteorological forces related to wind and pressure affect the regular tides and modify the sea level conditions, mainly in restricted waters such as bays. Investigations surrounding these variations and the biological and chemical response are important for monitoring coastal regions mainly where upwelling shelf systems occur. A spatial and temporal database from Quick Scatterometer satellite vector wind, surface stations from the Southeast coast of Brazil and surface seawater data collected in Anjos Bay, Arraial do Cabo city, northeast of Rio de Janeiro State were used to investigate the meteorological influences in the variability of the dissolved oxygen, nutrients, meroplankton larvae and chlorophyll-a concentrations. Multivariate statistical approaches such as Principal Component Analysis (PCA) and Clustering Analysis (CA) were applied to verify spatial and temporal variances. A correlation matrix was also verified for different water masses in order to identify the relationship between the above parameters. A seasonal variability of the meteorological residual presents a well-defined pattern with maximum peaks in autumn/winter and minimum during spring/summer with negative values, period of occurrence of upwelling in this region. This lowering of the sea level is in accordance with the increasing of nutrients and meroplankton larvae for the same period. CA showed six groups and an importance of the zonal and meridional wind variability, including these variables in a single cluster. PCA retained eight components, explaining 64.10% of the total variance of data set. Some clusters and loadings have the same variables, showing the importance of the sea-air interaction.

Desempenho de reatores anaeróbios de fluxo ascendente com manta de lodo em dois estágios tratando águas residuárias de suinocultura
Santana, Adriana M. de;Oliveira, Roberto A. de;
Engenharia Agrícola , 2005, DOI: 10.1590/S0100-69162005000300029
Abstract: the objective of this work was monitoring the performance of two up flow anaerobic sludge blanket reactors (uasb) in a pilot-scale testing with volumes of 908 l and 188 l, installed in series, loaded with swine wastewater with total suspended solids (tss) ranging from 2216 to 7131 mg l-1, submitted to an hydraulic detention time (hdt) of 62.3 and 31.1 h, in the first reactor, and 12.9 and 6.5 h, in the second reactor. the mean total cod removal efficiency varied from 74.0 to 89.6% in reactor 1, and from 34.3 to 45.1% in reactor 2, resulting average values ranging from 86.6 to 93.1% for the two-stage treatment system under organic volumetric load (ovl) of 3.40 to 14.44 kg codtotal m-3 reactor d-1 in the reactor 1. the methane concentration in biogas values was over 75% in reactor 1 and 80% in reactor 2. average ph values in the effluents ranged from 6.9 to 8.2 in reactor 1 and 7.0 to 8.3 for reactor 2. the amount of total volatile acids remained steady showing mean concentrations bellow 200 mg l-1. according to these results the organic loading conditions, concerning to the cod and vss imposed to the two-stage anaerobic treatment system were not limiting to the sludge blanket development of extremely active and adapted micro biota providing high mean values of organic matter removal, from 86.6 to 93.1 % to the codtotal and 85.6 to 88.2% to vss, and the rate of volumetric methane production from 0.156 to 0.289 m3 ch4 kg-1 cod removed.
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