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Search Results: 1 - 10 of 62 matches for " Bracarense "
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Ano novo!?: Vida nova?!
Alexandre Queiroz Bracarense
Soldagem & Inspe??o , 2011, DOI: 10.1590/s0104-92242011000100001
Abstract:
Proposta metodológica de cobran?a pelo uso dos recursos hídricos usando o valor de Shapley: uma aplica??o à bacia do rio Paraíba do Sul
Leite, Gil Bracarense;Vieira, Wilson da Cruz;
Estudos Econ?micos (S?o Paulo) , 2010, DOI: 10.1590/S0101-41612010000300006
Abstract: this study aimed to propose a methodology for charging for the use of water resources based on the allocation of costs - among sectors that demand water - of projects related to improvements in a river basin. this methodology consists of a rule of allocation known as shapley value, belonging to the theory of cooperative games, and to show its applicability, we performed a case study in a sub-basin of the paraíba do sul river basin. as criteria for allocation of costs, we used the volumes of water withdrawn and consumed, and the amount of effluent discharged into the river. in applying the methodology, we considered three different scenarios: "clean" basin, polluted basin, and an intermediate situation, closer to real situation now found in the sub-basin analyzed. the obtained results showed high dependence of the cost allocation criteria (weights assigned to the volumes of water withdrawn and consumed, and the quantity of effluent discharged), and, in the case of intermediate scenario considered, the values found indicate that the urban users should pay the greatest part of the costs when compared to the fees currently in use, since these users are among those that greatly discharge effluents, being the deterioration of water quality the most relevant problem in this basin.
Comparative Verification of Fatigue in Steel Using Bending Tension Tests Carried Through Different Environments
Castro C. A. C,Bracarense A. Q
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
Estudo sobre o correlacionamento do fen meno das bolhas e sinais elétricos na soldagem subaquática molhada com eletrodos revestidos Correlating study of bubble phenomenon and electrical signals in underwater wet welding with covered electrodes
Frederico de Rosa Oliveira,William Rodrigues Soares,Alexandre Queiroz Bracarense
Soldagem & Inspe??o , 2013,
Abstract: O fen meno das bolhas no processo de soldagem subaquática molhada é de vital influência na qualidade final das soldas. O bom entendimento da forma o e colapso das bolhas juntamente com o conhecimento do comportamento dos parametros de soldagem no decorrer do processo podem proporcionar melhorias nas práticas utilizadas na soldagem subaquática e, consequentemente, melhorias na qualidade final da solda. Para entender e tentar correlacionar o fen meno de crescimento, destacamento e frequência das bolhas com os sinais elétricos ao longo do processo de soldagem, este trabalho foi desenvolvido. Foram feitos cord es sobre chapa a 0,50 m de profundidade com três tipos de eletrodos revestidos comerciais, E6013, E7018 e E7024. Para visualiza o da forma o, destacamento e contagem das bolhas foi realizada a filmagem em alta velocidade do processo, juntamente com a aquisi o dos sinais elétricos do mesmo. P de-se ent o tentar correlacionar a frequência das bolhas com varia es dos sinais elétricos observados durante o process. Observou-se nos dados de corrente que o número médio de varia es abaixo de 5% da corrente média assemelha-se com o a taxa média de destacamento das bolhas. Assim concluiu-se a possibilidade de haver uma rela o entre o destacamento das bolhas com determinada varia o na corrente. The bubble phenomenon in underwater wet welding is very important in the weld's final quality. A good understanding of the formation and collapse of the bubbles with the knowledge of the welding parameters behavior along the process can improve the practices used in the underwater welding and, consequently, improve the final weld quality. To understand and try to correlate the phenomenon of growth, detachment and frequency of the bubbles with the electrical signals along the welding process this work was done. Three commercial covered electrodes, E6013, E7024 e E7018 were used to made beds on plate in a depth of 0,50 m. To visualize the formation, detachment and counting of the bubbles a high speed camera was used to record the process, together with electrical signals acquisition. So it was possible try to correlate the bubble frequency with the electrical signals observed along the process. That was observed in the currents data that the average number of variations under 5% of the average current is similar with the average rate of bubbles detachment. Therefore was concluded the possible relationship of the bubble detachment with a determined variation in the current.
Use of polymerase chain reaction and enzymatic cleavage in the identification of Helicobacter spp. in gastric mucosa of human beings from North Paraná, Brazil
Camargo PL,Alfieri AA,Bracarense APFRL,Menoli R
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: Helicobacter pylori is the most common gastric bacteria of human beings. Animal-borne helicobacter have been associated with gastritis, ulceration, and gastric mucosa-associated lymphoid-tissue lymphoma in people. We attempted to identify the species of Helicobacter spp. that infect human beings in north Paraná, Brazil. Samples of gastric mucosa from 38 dyspeptic patients were analyzed by optic microscopy on silver stained slides, polimerase chain reaction (PCR), and enzymatic cleavage. Genus and species-specific primers to H. pylori, H. heilmannii, H. felis, and consensual primers to H. bizzozeronii or H. salomonis were used. The PCR products were submitted to enzymatic cleavage by VspI (Helicobacter spp. product) and HinfI (species products) enzymes. Thirty-two out of 38 patients evaluated had 3.2 to 5 μm long bacteria that resembled H. pylori in Warthin-Starry stained slides and were positive to the genus Helicobacter by PCR. In 30 of these patients the bacteria were identified as H. pylori. Two samples positive by silver stain were negative to all species tested by PCR. None of the 38 samples was positive to animal-origin helicobacter species. These results show that PCR and enzymatic restriction are practical methods to identify the species of helicobacters present in gastric mucosa of human beings. People in north Paraná appear to be infected mostly with H. pylori.
Role of bracken fern (Pteridium aquilinum (L.) Kuhn) in animal and human heath/ Toxicidade da samambaia (Pteridium aquilinum (L.) Kuhn) para a saúde animal e humana
Guilherme Durante Cruz,Ana Paula F. R. L. Bracarense
Semina : Ciências Agrárias , 2004,
Abstract: The article reviews some of the main characteristics of Pteridium aquilinum (bracken fern) and the main consequences of its ingestion by livestock animals, laboratory animals and man. Ptaquiloside is considered the main responsible for the neoplasias in these cases. Three main routes may lead to human exposure to the toxic effects of bracken fern: eating the plant, physical contact (inhalation of the spores or ingestion of contaminated water) and ingestion of raw milk from affected animals. O artigo revisa algumas das principais características da planta Pteridium aquilinum (samambaia) bem como as conseqüências da sua ingest o por animais de produ o, animais de laboratório e pelo próprio homem. O composto ptaquilosídeo encontrado na planta é considerado atualmente o principal responsável pelo aparecimento de neoplasias. No homem, existem três maneiras pelo qual este pode ser intoxicado: ingest o da planta, contato físico (inala o dos esporos ou ingest o de água contaminada) e ingest o de leite cru de animais que ingeriram a planta.
Deoxynivanelol and Fumonisin, Alone or in Combination, Induce Changes on Intestinal Junction Complexes and in E-Cadherin Expression
Karina Basso,Fernando Gomes,Ana Paula Loureiro Bracarense
Toxins , 2013, DOI: 10.3390/toxins5122341
Abstract: Fusariotoxins such as fumonisin B1 (FB1) and deoxynivalenol (DON) cause deleterious effects on the intestine of pigs. The aim of this study was to evaluate the effect of these mycotoxins, alone and in combination, on jejunal explants from piglets, using histological, immunohistochemical and ultrastructural assays. Five 24-day old pigs were used for sampling the explants. Forty-eight explants were sampled from each animal. Explants were incubated for 4 hours in culture medium and medium containing FB1 (100 μM), DON (10 μM) and both mycotoxins (100 μM FB1 plus 10 μM DON). Exposure to all treatments induced a significant decrease in the normal intestinal morphology and in the number of goblet cells, which were more severe in explants exposed to DON and both mycotoxins. A significant reduction in villus height occurred in groups treated with DON and with co-contamination. Expression of E-cadherin was significantly reduced in explants exposed to FB1 (40%), DON (93%) and FB1 plus DON (100%). The ultrastructural assay showed increased intercellular spaces and no junction complexes on enterocytes exposed to mycotoxins. The present data indicate that FB1 and DON induce changes in cell junction complexes that could contribute to increase paracellular permeability. The ex vivo model was adequate for assessing intestinal toxicity induced by exposure of isolated or associated concentrations of 100 μM of FB1 and 10 μM of DON.
Use of polymerase chain reaction and enzymatic cleavage in the identification of Helicobacter spp. in gastric mucosa of human beings from North Paraná, Brazil
Camargo, PL;Alfieri, AA;Bracarense, APFRL;Menoli, R;Spinosa, SR;Hagiwara, MK;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000200016
Abstract: helicobacter pylori is the most common gastric bacteria of human beings. animal-borne helicobacter have been associated with gastritis, ulceration, and gastric mucosa-associated lymphoid-tissue lymphoma in people. we attempted to identify the species of helicobacter spp. that infect human beings in north paraná, brazil. samples of gastric mucosa from 38 dyspeptic patients were analyzed by optic microscopy on silver stained slides, polimerase chain reaction (pcr), and enzymatic cleavage. genus and species-specific primers to h. pylori, h. heilmannii, h. felis, and consensual primers to h. bizzozeronii or h. salomonis were used. the pcr products were submitted to enzymatic cleavage by vspi (helicobacter spp. product) and hinfi (species products) enzymes. thirty-two out of 38 patients evaluated had 3.2 to 5 μm long bacteria that resembled h. pylori in warthin-starry stained slides and were positive to the genus helicobacter by pcr. in 30 of these patients the bacteria were identified as h. pylori. two samples positive by silver stain were negative to all species tested by pcr. none of the 38 samples was positive to animal-origin helicobacter species. these results show that pcr and enzymatic restriction are practical methods to identify the species of helicobacters present in gastric mucosa of human beings. people in north paraná appear to be infected mostly with h. pylori.
Transmiss?o congênita de Babesia bovis
Bracarense, A.P.F.L.;Vidotto, O.;Cruz, G.D.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001, DOI: 10.1590/S0102-09352001000400017
Abstract: a case of prenatal babesia bovis infection in brazil in a 17 year-old holstein ′ brown swiss cow which aborted at approximately eight months of gestation is described and discussed. the newborn calf outlived for few minutes and then died. at necropsy, the thoracic and abdominal cavities were filled by a great volume of a transparent liquid and petechial hemorrhages in oral mucosa and epicardium were observed. histopathologic examination stained by haematoxylin-eosin of lungs, spleen, liver, kidneys, brain and cerebellum revealed variable degrees of congestion and edema, particularly in the liver and brain. in the liver, inflammatory multi-nucleated cells were seen surrounding the portal area and a reasonable degeneration was noted. the brain also revealed endothelium reaction, multi-located hemorrhagic areas in blood vessels and neuronal degeneration. the diagnosis was based on necropsy and microscopic examination of brain that showed b. bovis in the capillary vessels in imprints by giemsa.
Avuls?o do plexo braquial em c?es - 2: biópsia fascicular e histologia dos nervos radial, mediano, ulnar e musculocutaneo
Arias, M?nica Vicky Bahr;Bracarense, Ana Paula Frederico Loureiro;Stopiglia, ?ngelo Jo?o;
Ciência Rural , 1997, DOI: 10.1590/S0103-84781997000100015
Abstract: the main purposes of this work were the neurological evaluation of dogs with brachial plexus avulsion and correlation of these findings with the results of histology of the radial, median, and ulnar and muscle cutaneous nerves. fascicular nerve biopsy was performed after surgical approach of medial and lateral aspect of the arm. ali the submitted fascicles presented histologic alterations compatible with wallerian degeneration, axonal swelling, and inflammatory infiltrate ranging from mild to pronounced, with endoneural collagen proliferation mainly in radial, median and ulnar nerves. the association of these results with neurological and electroneurostimulation exams (respectively described in part 1 and 3 of this work) suggested in all cases an almost total involvement of brachial plexus roots.
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