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Search Results: 1 - 10 of 186945 matches for " Renata Osório de Faria "
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ESPOROTRICOSE FELINA: RELATO DE CASOS SCIENTIFIC REPORT:FELINE SPOROTRICHOSIS – CASE REPORTS
Ana Raquel Mano Meinerz,Patrícia da Silva Nascente,Luiz Filipe Damé Schuch,Renata Osório de Faria
Ciência Animal Brasileira , 2007,
Abstract: o felino doméstico com esporotricose representa um papel importante na transmiss o do S. schenckii a ou-tros animais e para o homem sendo crescente o aumento do número de casos zoonóticos da micose. o estudo des-creve três casos de esporotricose em gatos semidomicilia-dos, convivendo no mesmo bairro. os felinos apresenta-ram les es cutaneas ulceradas e crostosas, sendo realizada a confirma o do diagnóstico após a análise micológica com o isolamento do S. schenckii. o estudo ressalta a im-portancia dos felinos domésticos como propagadores da esporotricose para animais e para o homem. PALAVRAS-CHAVE: Esporotricose, zoonose, felino, Sporothrix schenckii. the domestic feline with sporotrichosis represents an important role in the transmission of the S. schenckii schenckii to other animal species and for the man being growing the increase of the number of zoonotic cases of the mycosis. the study reports three cases of feline sporo-trichosis in semi-domiciled cats, living together in the same neighborhood. the feline presented cutaneous ulcerated and crusted injuries being accomplished the confirmation of the diagnosis after the analysis micológica with the isolation of S. schenckii. the study emphasizes the importance of the domestic feline as diffuser of the sporotrichosis for other animals and for the man itself. KEY-WORDS: feline, sporotrichosis, zoonosis, Sporothrix schenckii.
Esporotricose cutanea experimental: Avalia??o in vivo do itraconazol e terbinafina
Antunes, Tatiana de ávila;Nobre, Márcia de Oliveira;Faria, Renata Osório de;Meinerz, Ana Raquel Mano;Martins, Anelise Afonso;Cleff, Marlete Brum;Fernandes, Cristina Gevehr;Meireles,rio Carlos Araújo;
Revista da Sociedade Brasileira de Medicina Tropical , 2009, DOI: 10.1590/S0037-86822009000600018
Abstract: the aim of this study was to evaluate the in vivo activity of itraconazole and terbinafine for treating experimental cutaneous sporotrichosis. eighty wistar rats were used, divided into four groups (terb20, terb30, itra and cont). they were inoculated in the left plantar pad with 0.2 ml of solution containing 2x103 cell/ml of sporothrix schenckii and treated with terbinafine (20 and 30 mg/kg), itraconazole (10 mg/kg) or placebo for 13 weeks. the lesions at the inoculation site were evaluated and measured weekly, along with their dissemination. mycological and histopathological analyses were performed subsequently. the results showed that the animals in the itra group differed statistically in all parameters evaluated, in relation to cont. for terbinafine, there were no statistical differences between the treated and control groups. it could be confirmed that itraconazole presented good activity for treating sporotrichosis, while terbinafine was ineffective for this disease at the doses used. however, more studies on the latter antifungal agent are needed.
CLSI broth microdilution method for testing susceptibility of Malasseziapachydermatis to thiabendazole
Nascente, Patrícia da Silva;Meinerz, Ana Raquel Mano;Faria, Renata Osório de;Schuch, Luiz Filipe Damé;Meireles,rio Carlos Araújo;Mello, Jo?o Roberto Braga de;
Brazilian Journal of Microbiology , 2009, DOI: 10.1590/S1517-83822009000200002
Abstract: thiabendazole, classified as antiparasitic and also used as an antifungal drug, can be found as otological solution indicated for treatment of parasitic and fungal external otitis in small animals. malassezia pachydermatis is a yeast recognized as a normal inhabitant on the skin and mucous membranes of dogs and cats. however, it is considered an opportunistic agent that causes external otitis and dermatitis in these animals. the aim of this study was to evaluate the in vitro effect of thiabendazole against 51 isolates of m. pachydermatis using the clsi broth microdilution method that has been adapted for this yeast species (nccls, 2002). based on this test, the minimum inhibitory concentrations (mic) of thiabendazol was calculated. subsequently, the susceptibility of each isolate against this antifungal was determined. it was observed that the mic of thiabendazole against m. pachydermatis ranged from 0.03 to > 4 μg/ml. a total of 13.7% of the isolates were found to be resistant, 47.1% were intermediate and 39.2% were sensitive to the drug. the rate of resistance of the yeasts against thiabendazole was similar to the results previously obtained with other antifungals, while the adapted broth microdilution technique used in this study proved to be efficient.
Isolation of Candida spp from vaginal microbiota of healthy canine females during estrous cycle
Cleff, Marlete Brum;Lima, Alzira Pacheco de;Faria, Renata Osório de;Meinerz, Ana Raquel Mano;Antunes, Tatiana de ávila;Araújo, Flávia Biasoli de;Nascente, Patrícia da Silva;Nobre, Márcia de Oliveira;Meireles,rio Carlos Araújo;
Brazilian Journal of Microbiology , 2005, DOI: 10.1590/S1517-83822005000200018
Abstract: yeasts are commensal organisms found in the skin, genital and gastrointestinal tracts, and other mucosa in mammalians. candida spp has been frequently isolated from domestic and sylvan animals. yeast isolation from vaginal mucus is frequent in women, especially of candida genus. in canine females, however, studies about vaginal fungal microbiota are rare and the connection with estrous cycle is unknown. the purpose of this study was to isolate yeast 5 of candida genus from healthy canine females and identify the isolated species, establishing their connection with estrous cycle phases. two hundred twenty-four samples taken from vaginal mucus of 14 canine females were analyzed in this study. candida spp was observed in 83 (37%) from these samples; nine samples were taken in proestrus, 14 in oestrus, 31 in dioestrus, 24 in anoestrus and five samples were obtained during pregnancy. candida parapsilosis the most frequently isolated specie (21.7%), followed by c. guillermondii (8.4%), c. kefir (6%) and c. albicans (4.8%). we concluded that candida spp is a commion component of healthy canine females' vaginal microbiota, and isolation varies according to the estrous cycle phase.
Ocorrência de Cryptococcus neoformans em excretas de pombos na cidade de Pelotas, Estado do Rio Grande do Sul
Faria, Renata Osório de;Nascente, Patrícia da Silva;Meinerz, Ana Raquel Mano;Cleff, Marlete Brum;Antunes, Tatiana de Avila;Silveira, érica da Silva;Nobre, Márcia de Oliveira;Meireles,rio Carlos Araújo;Mello, Jo?o Roberto Braga de;
Revista da Sociedade Brasileira de Medicina Tropical , 2010, DOI: 10.1590/S0037-86822010000200018
Abstract: introduction: cryptococcus neoformans is an encapsulated yeast and is the etiological agent for human and animal cryptococcosis. it is found in sources within the environment, including pigeon excrement, and is an important cause of mortality among immunocompromised individuals worldwide. methods: seventy different environments in the city of pelotas, rio grande do sul, were surveyed for the purpose of investigating cryptococcus neoformans occurrences in pigeon excreta. the environments included buildings, public squares and outdoor locations in the city. after collection, chloramphenicol saline solution was added to the excreta, which were then homogenized and seeded onto sabouraud agar with chloramphenicol and onto niger agar, and incubated at 32°c. identification was performed by direct examination and by means of the phenoloxidase and urease tests, carbohydrate assimilation and culturing in cgb medium. results: out of the sites investigated (n = 70), 26 (37.1%) of them contained pigeon excreta. these included historical buildings (n = 8), a church tower (n = 1), rice mills and warehouses (n = 7), a public square (n = 1) and outdoor locations (n = 9). cryptococcus neoformans was isolated from 26.9% (n = 7/26) of these locations. conclusions: this study draws attention to isolation of this fungus in urban areas that present large accumulations of pigeon excrement. this represents a risk to public health, especially for immunocompromised individuals.
Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
Gomes, Maria de Lourdes Ilha;Osório, Eduardo;Vilela, Ant?nio Cezar Faria;
Materials Research , 2006, DOI: 10.1590/S1516-14392006000100017
Abstract: pulverized coal injection (pci) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. coals typically used in this process in brazil are, at current time, exclusively imported from many countries, although economic important coal-measures occur in the southern part of the country. the brazilian coals have a low rank, higher contents of inert components, proportioning nocoking properties and an expected high reactivity. due to these caractheristics, these coals could be used for injection in the blast furnaces in order to decrease the dependency on high cost imported coals. the efficiency in the combustion and the coal reactivity are considered important parameters in the blast furnace, since a larger amount of char (unburned coal) causes severe problems to the furnace operation. the aim of the present work is to compare the reactivity of a south brazilian coal, obtained from faxinal mine, with two imported coals and the blends of the brazilian coal with the imported ones. the reactivity of these coals and their blends were evaluated in a thermogravimetric analyzer. in the experiments, various mass ratios of faxinal coal and the imported coals were used to compose the blends. the gasification reaction with pure co2 was conducted under isothermal conditions at 1050 °c and atmospheric pressure. the experimental results show the greater reactivity of the faxinal coal. the additive behavior was confirmed. the blends with a composition of up to 50% faxinal coal have parameters according to the usual limits used for pci.
Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
Gomes Maria de Lourdes Ilha,Osório Eduardo,Vilela Ant?nio Cezar Faria
Materials Research , 2006,
Abstract: Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively imported from many countries, although economic important coal-measures occur in the southern part of the country. The Brazilian coals have a low rank, higher contents of inert components, proportioning nocoking properties and an expected high reactivity. Due to these caractheristics, these coals could be used for injection in the blast furnaces in order to decrease the dependency on high cost imported coals. The efficiency in the combustion and the coal reactivity are considered important parameters in the blast furnace, since a larger amount of char (unburned coal) causes severe problems to the furnace operation. The aim of the present work is to compare the reactivity of a south Brazilian coal, obtained from Faxinal mine, with two imported coals and the blends of the Brazilian coal with the imported ones. The reactivity of these coals and their blends were evaluated in a thermogravimetric analyzer. In the experiments, various mass ratios of Faxinal coal and the imported coals were used to compose the blends. The gasification reaction with pure CO2 was conducted under isothermal conditions at 1050 degreesC and atmospheric pressure. The experimental results show the greater reactivity of the Faxinal coal. The additive behavior was confirmed. The blends with a composition of up to 50% Faxinal coal have parameters according to the usual limits used for PCI.
Uso de equa??es lineares na determina??o dos parametros de Michaelis-Menten
Carvalho, Nakédia M. F.;Pires, Bianca M.;Antunes, Octavio A. C.;Faria, Roberto B.;Osório, Renata E. H. M. B.;Piovezan, Clovis;Neves, Ademir;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000700033
Abstract: the michaelis-menten equation is used in many biochemical and bioinorganic kinetic studies involving homogeneous catalysis. otherwise, it is known that determination of michaelis-menten parameters km, vmax, and kcat by the well-known lineweaver-burk double reciprocal linear equation does not produce the best values for these parameters. in this paper we present a discussion on different linear equations which can be used to calculate these parameters and we compare their results with the values obtained by the more reliable nonlinear least-square fit.
Amylolytic Microorganism from S?o Paulo Zoo Composting: Isolation, Identification, and Amylase Production
Renata C. Pascon,Rogério Faria Bergamo,Rafael Xavier Spinelli,Elisangela Dutra de Souza,Diego Magno Assis,Luiz Juliano,Marcelo Afonso Vallim
Enzyme Research , 2011, DOI: 10.4061/2011/679624
Abstract: Composting is a way of transforming the organic waste into fertilizer, minimizing the use of inorganic compounds that may contaminate the environment. This transformation is the result of the microorganism action, converting complex carbon sources into energy. Enzymes that are exported by the microorganisms to the surrounding environment mediate this process. The aiming of the present work is to prospect the compost produced by the organic composting unit (OCU) of the Funda??o Parque Zoológico de S?o Paulo (FPZSP) to find novel starch hydrolyzing organisms (SHO) that secrete large amounts of amylases under harsh conditions, such as high temperature. We found five bacterial isolates that have amylolytic activity induced by soluble starch and 39°C temperature of growth. These bacterial strains were identified by MALDI-TOF (Matrix-assisted laser desorption/ionization-Time of Flight) analysis, a rapid and efficient methodology for microbe identification in large scale. Our results present amylolytic strains that belong to diverse taxonomic groups (Solibacillus silvestris, Arthrobacter arilaitensis, Isoptericola variabilis, and Acinetobacter calcoaceticus); some of them have never been associated with this kind of hydrolytic activity before. The information regarding enzyme induction will be important to optimize the production by the bacterial isolates, which may be a great value for biotechnological applications. 1. Introduction Amylases produced by plants, animals, and microorganisms have a wide range of industrial applications, such as pharmaceutical, animal feed, paper, textile, food industry, and renewable energy [1–3]. Most amylases used in industry are from microbial source due to several factors, for example, the great microbial genetic diversity present in the environment, high enzymatic activity in a wide range of conditions (extreme pH, temperature, osmolarity, pressure, etc.), and simple and cost effective production [4]. Industrial processes require robust enzymes, especially because large amounts of heat are generated during the process, accumulation of inhibitors, high salt concentrations, and so forth; therefore, hydrolytic microbes, which have their hydrolases induced by temperature, may produce thermotolerant enzymes and, consequently, are highly desirable [5, 6]. Composting is the transformation of residual organic matter into fertilizer accomplished by microorganism, which secrete, among other things, hydrolytic enzymes to assimilate diverse energy sources available in the substrate in order to survive. Compost piles can reach up to 80°C
Mandibular periosteal (juxtacortical) chondrosarcoma
Costa, Elisangela Maria Cunha;Lucas, Bárbara Lima;Silva, Mariana Reis;Vilarinho, Renata Hinhug;Faria, Paulo Rogério de;Loyola, Adriano Mota;
Brazilian Dental Journal , 2009, DOI: 10.1590/S0103-64402009000500013
Abstract: periosteal (juxtacortical) chondrosarcoma (pc) is a well-differentiated malignant cartilage-forming tumor arising from the external bone surface, especially in long bones. the therapy of choice is en-bloc resection and, in general, its prognosis is good. this paper reports a rare case of pc affecting the mandible of a 41-year-old man. the lesion presented as a slow-growing-painless swelling that lasted 2 months. computed tomography scan showed a tumoral mass arising from the external bone surface, extending into the adjacent soft tissue presenting patchy regions of popcorn-like calcifications. a final diagnosis of pc (grade ii) was rendered after biopsy. hemimandibulectomy was undertaken followed by complementary radiotherapy with 70 gy. although no episodes of recurrence or metastasis had been noticed after 18 months of follow-up, the patient died and causa mortis could not be established.
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