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Search Results: 1 - 10 of 491021 matches for " DINIZ Fábio M. "
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Decomposition of trimethylamine oxide related to the use of sulfites in shrimp
CINTRA, Israel H.A.;OGAWA, Norma B.P.;SOUZA, Maria R.;DINIZ, Fábio M.;OGAWA, Masayoshi;
Ciência e Tecnologia de Alimentos , 1999, DOI: 10.1590/S0101-20611999000300003
Abstract: currently, sulfites are employed on board to inhibit melanosis (blackspot) on crustaceans. however, when used in excess this chemical compound not only can cause adverse reactions in so2-sensitive individuals, but also favors the decomposition of trimethylamine oxide (tmao) into dimethylamine (dma) and formaldehyde (fa), thus compromising the quality of the product, which can be observed mainly through the texture change of the meat after cooking. this study was conducted to verify the increase of the contents of dma and fa by the excessive use of sodium metabisulfite in white shrimp (penaeus schmitti). for laboratory trials, shrimp were beheaded, washed and immersed in a 2% sodium metabisulfite solution for 10 minutes. specimens were stored either on ice and maintained for 48 hours in refrigeration, or stored in a freezer for 48 hours. samples were collected at intervals of 0, 24 and 48 hours, and analyzed for residual so2, tmao, tma, dma and fa. the immersion of shrimp in a 2% sodium metabisulfite for 10 minutes favored the decomposition of tmao which greatly increased the contents of dma and fa. the fa and dma measured in fresh shrimp was low. moreover, the storage of shrimp tails on ice resulted in a significant reduction of the tma, dma, fa and residual so2 contents compared to the specimens under frozen storage.
Decomposition of trimethylamine oxide related to the use of sulfites in shrimp
CINTRA Israel H.A.,OGAWA Norma B.P.,SOUZA Maria R.,DINIZ Fábio M.
Ciência e Tecnologia de Alimentos , 1999,
Abstract: Currently, sulfites are employed on board to inhibit melanosis (blackspot) on crustaceans. However, when used in excess this chemical compound not only can cause adverse reactions in SO2-sensitive individuals, but also favors the decomposition of trimethylamine oxide (TMAO) into dimethylamine (DMA) and formaldehyde (FA), thus compromising the quality of the product, which can be observed mainly through the texture change of the meat after cooking. This study was conducted to verify the increase of the contents of DMA and FA by the excessive use of sodium metabisulfite in white shrimp (Penaeus schmitti). For laboratory trials, shrimp were beheaded, washed and immersed in a 2% sodium metabisulfite solution for 10 minutes. Specimens were stored either on ice and maintained for 48 hours in refrigeration, or stored in a freezer for 48 hours. Samples were collected at intervals of 0, 24 and 48 hours, and analyzed for residual SO2, TMAO, TMA, DMA and FA. The immersion of shrimp in a 2% sodium metabisulfite for 10 minutes favored the decomposition of TMAO which greatly increased the contents of DMA and FA. The FA and DMA measured in fresh shrimp was low. Moreover, the storage of shrimp tails on ice resulted in a significant reduction of the TMA, DMA, FA and residual SO2 contents compared to the specimens under frozen storage.
Aspectos de imagem na tendinite calcária pré-vertebral
Grassi, Caio Giometti;Diniz, Fábio de Vilhena;Garcia, Márcio Ricardo Taveira;Gomes, Regina Lúcia Elia;Daniel, Mauro Miguel;Funari, Marcelo Buarque de Gusm?o;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000500012
Abstract: acute calcific prevertebral tendinitis is a benign and rare condition that presents calcification of the superior oblique fibers of longus colli muscle with local inflammatory reaction. such condition is one of the less common presentations of calcium hydroxyapatite deposition disease. clinical signs are usually acute neck pain and odynophagia, and it may be misdiagnosed as retropharyngeal abscess, spondylodiscitis or traumatic injury. the imaging findings in calcific prevertebral tendinitis are pathognomonic. the knowledge of such findings is extremely important to avoid unnecessary interventions in a patient presenting a condition with a good response to conservative treatment.
Composi o e estrutura da comunidade vegetal em regenera o sob plantios de Pinus spp. (Pinaceae) em Rio Claro, SP. Composition and structure of regenerating plant community under Pinus spp. (Pinaceae) plantations in Rio Claro, State of S o Paulo, Brazil.
Fábio Vicentin DINIZ,Reinaldo MONTEIRO
Revista do Instituto Florestal , 2008,
Abstract: Florestas plantadas com espécies exóticass o freqüentemente consideradas como ambientesde baixa diversidade. No entanto, estudos recentestêm mostrado que isso n o é verdadeiro. No presenteestudo procurou-se analisar a composi o florísticae a estrutura das comunidades vegetais emregenera o sob plantios de Pinus. Para tanto,foram instaladas 48 parcelas de 10 x 10 mdistribuídas em duas diferentes áreas de plantiocom Pinus na Floresta Estadual “Edmundo Navarrode Andrade” - FEENA, município de Rio Claro,SP. Todos os indivíduos com 10 cm ou mais deperímetro do tronco no nível do solo - PAS foramincluídos na amostragem. Foram calculados osparametros fitossociológicos e a estratifica overtical das comunidades vegetais amostradas,bem como as similaridades florísticas e estruturaiscom outras comunidades regenerantes estudadas naFEENA. As comunidades vegetais estudadasmostraram uma alta riqueza de espécies para umaárea com plantio silvicultural, porém com baixadiversidade, uma vez que foram poucas as espéciesdominantes e muitas as espécies raras amostradas.O estudo de similaridade florística indicou baixasimilaridade entre os talh es estudados e as demaisáreas estudadas na FEENA. A grande maioriados indivíduos amostrados encontra-se nosestratos mais inferiores da regenera o, sendoraros os que se aproximam do dossel e nenhumemergente. Por fim, o estudo serviu de subsídiopara mostrar a utiliza o de espécies de Pinuscomo pioneiras no processo de recupera o deáreas degradadas, uma vez que é possível,a longo prazo, o desenvolvimento de comunidadesvegetais relativamente diversificadas no sub-bosquede florestas plantadas com estas espécies.Understorey of forests planted withexotic species has been taken as a low diversityenvironment, but some recent papers have showna different scenario. This paper brings an analysisof the floristic composition and the structure ofplant communities growing as regeneration underPinus spp. stands. The survey comprised 48 plots(10 x 10 m) distributed in two areas with Pinus inthe State Forest “Edmundo Navarro de Andrade -FEENA”, in the municipality of Rio Claro, state ofS o Paulo, Brazil. The sampling included allindividuals with the minimum of 10 cm of trunkperimeter at the ground level, for which taxonomicidentification was obtained. The standard populationparameters and the vertical stratification werecalculated. Both stands were compared to all otheravailable studies for the FEENA, whether theyincluded Pinus or Eucalyptus spp. understorey.The results show a high species richness in thestudied areas, although with low diversity due
Estudo da contamina o biológica por Pinus spp. em três diferentes áreas na Esta o Ecológica de Itirapina (SP, Brasil). Study on Pinus spp. biological contamination in three different areas within the Itirapina Ecological Station (S o Paulo, Brazil).
Denise ZANCHETTA,Fábio Vicentin DINIZ
Revista do Instituto Florestal , 2006,
Abstract: Constituída por cerrado em suas diversasexpress es fision micas, a Esta o Ecológica deItirapina sofre com a dissemina o de espécies dePinus provenientes da Esta o Experimental deItirapina, com a qual faz divisa. Este trabalho tevecomo objetivo analisar o processo de invas obiológica dessas espécies de Pinus na área daEsta o Ecológica, procurando avaliar os seguintesfatores: qual espécie é a mais invasiva na área, quaiss o os possíveis sítios de dissemina o e quais s o asáreas mais atingidas pela invas o. Tal avalia oprocura dar subsídios para uma estratégia de manejoda área, visando minimizar o processo decontamina o da vegeta o nativa por Pinus spp.Verificou-se que a espécie Pinus elliottii é a maisinvasiva na área, sendo os talh es da Esta oExperimental os principais sítios de dissemina odesta espécie. As áreas úmidas da Esta o Ecológicas o as mais afetadas, havendo nestes locais umaalta densidade de indivíduos de Pinus elliottii.Os resultados sugerem a necessidade de se instalaruma barreira biológica, principalmente nos talh es daEsta o Experimental contíguos à Esta o Ecológica,visando minimizar a dispers o de sementes destestalh es, além de procurar alternativas de remo odos indivíduos que já se instalaram nessa Unidadede Conserva o do grupo de prote o integral.The Itirapina Ecological Station,protecting the Cerrado in its different physiognomicaltypes, is suffering the continuous pressure of Pinusinvasion (dissemination) coming from its neighborarea, the Experimental Station. The objective ofthis paper was to analyze the process of thisbiological invasion forward to quantify thefollowing factors: which species is the mostaggressive; which are the possible sites responsiblefor this dissemination and which areas are themost affected by the invasion. This evaluationintends to support a strategy for management inorder to minimize the impact of this Pinus spp.contamination process. It was identified that Pinuselliottii is the most invasive species of all and thatthe main source of this invasion is located into theExperimental Station. It is concluded that the wetareas of the Ecological Station are the mostaffected sites, still having the Pinus elliottii as thespecies with the highest population density. The resultssuggest the need for a biological barrier betweenboth Stations, looking to minimize the seeddissemination from the closest forest blocks, besidesthe mechanical cutting of the trees already installedin this restricted protection Conservation Unit.
Ecophysiology of tropical tree crops: an introduction
DaMatta, Fábio M.;
Brazilian Journal of Plant Physiology , 2007, DOI: 10.1590/S1677-04202007000400001
Abstract: in this special issue, ecophysiology of major tropical tree crops, considered here on a broader sense and including species such as banana, cashew, cassava, citrus, cocoa, coconut, coffee, mango, papaya, rubber, and tea, are examined. for most of these crops, photosynthesis is treated as a central process affecting growth and crop performance. the crop physiological responses to environmental factors such as water availability and temperature are highlighted. several gaps in our database concerning ecophysiology of tropical tree crops are indicated, major advances are examined, and needs of further researches are delineated.
Emprego de metilfenidato para o tratamento de déficit cognitivo em paciente com seqüela de traumatismo cranioencefálico
Rocha, Fábio Lopes;Malloy-Diniz, Leandro F.;Hara, Cláudia;
Jornal Brasileiro de Psiquiatria , 2006, DOI: 10.1590/S0047-20852006000100012
Abstract: traumatic brain injury is the main cause of death and disability among young people. attention deficits and executive dysfunction occur frequently after prefrontal cortex damage. the authors report a case of methylphenidate use for the treatment of cognitive deficits in a patient with a two-year evolution of traumatic brain injury. after two months, the patient reported significant improvement in his cognitive deficits, with increased ability to pay attention to reading, talking, watching films and reduction in the frequency of losing objects. as a side effect, he complained of a small increase in irritability in the first two weeks. the neuropsychological assessment showed a substantial improvement in the mental processing speed, in the omission errors and in the commission errors.
Application of a double-enrichment procedure for microsatellite isolation and the use of tailed primers for high throughput genotyping
Diniz, Fábio Mendon?a;Iyengar, Arati;Lima, Paulo Sarmanho da Costa;Maclean, Norman;Bentzen, Paul;
Genetics and Molecular Biology , 2007, DOI: 10.1590/S1415-47572007000300014
Abstract: the number of microsatellite loci and their allelic diversity contribute to increase accuracy and informativity of genetic estimates, however, the isolation of microsatellite loci is not only laborious but also quite expensive. we used (gata)n and (gaca)n tetranucleotide probes and single- and double-enrichment hybridization to construct and screen a genomic library with an increased proportion of dna fragments containing repeat motifs. repeats were found using both types of hybridization but the double-enrichment procedure recovered sequences of which 100% contained (gata)n and (gaca)n motifs. microsatellite loci primers were then designed with an m13r-tail or cag-tag to produce scorable pcr products with minimal stutter. the approach used in this study suggests that double-enrichment is a worthwhile strategy when isolating repeat motifs from eukaryotic genomes. moreover, the use of tailed microsatellite primers provides increased resolution for compound microsatellite loci, with a significant decrease in costs.
Analysis of direct costs of anesthesia-related materials between spinal and venous anesthesia with propofol associated with local perianal block in hemorrhoidectomy
Kotze, Paulo Gustavo;Froehner Junior, Ilario;Freitas, Cristiano Denoni;Diniz, Fábio;Steckert-Filho, álvaro;
Journal of Coloproctology (Rio de Janeiro) , 2011, DOI: 10.1590/S2237-93632011000300007
Abstract: there is no consensus on the ideal anesthesia for hemorrhoidectomy in ambulatory facilities. spinal anesthesia and venous propofol associated with local perianal block (combined anesthesia) are frequently used, and their direct costs may be crucial for the anesthesia type selection. the objective of this study was to compare the direct costs of anesthesia-related materials in hemorrhoidectomy between these two anesthetic techniques.retrospective and cross-section analysis, comparing the direct costs of the materials of spinal and venous anesthesia with propofol associated with local perianal block, in hemorrhoidectomy. twenty patients were included, ten submitted to each anesthesia type (five from each gender). the mean age in the spinal anesthesia group was 46.5 years and in the combined anesthesia group, 42.5 years (p=0.334). the mean cost of anesthesia-related materials was r$ 58.50 (r$ 36.48 - r$ 85.79) in the first group versus r$ 190.31 (r$ 98.16 - r$ 358.51) in the second - 69.27% difference between them (p<0.001). the mean costs according to gender analysis were r$ 50.32 and r$ 66.69 (p=0.263) in the spinal anesthesia group versus r$ 222.52 and r$ 158.10 (p=0.221) in the combined anesthesia group, respectively. the direct costs of anesthesia-related materials were significantly lower in patients submitted to hemorrhoidectomy using spinal anesthesia. no difference was observed between the genders in each group analyzed.
Germina??o de sementes de Senna siamea (Lam.) H.S. Irwin E Barneby: Caesalpinoideae
Dutra, Alek Sandro;Medeiros Filho, Sebasti?o;Teófilo, Elizita Maria;Diniz, Fábio Oliveira;
Revista Brasileira de Sementes , 2007, DOI: 10.1590/S0101-31222007000100022
Abstract: senna siamea is a tree from thailand that has adapted well to the climatic conditions of the northeast of brazil, that has been used for arborization, hedges and timber production. this research was divided in two experiments that aimed to identify methods to break dormancy and verify how temperature and light can affect germination of its seeds. in the experiment the germination percentages of hard and dead s. siamea seeds were determined using the treatments: humid heat, immersion in sulfuric acid and hot water, mechanical scarification, aiming at breaking dormancy and the control. in the second experiment, s. siamea seeds that had been immersed in sulfuric acid were placed on filter paper and submitted to five light period/temperature combinations: continuous light and constant temperature (25oc), continuous light and two different temperatures (35oc/8h and 20oc/16h), continuous dark and constant temperature (25oc), continuous dark and two different temperatures (35oc/8h and 20oc/16h), and different light periods and temperatures (light/35oc/8h and dark/20oc/16h). from the experiments it was concluded that s. siamea seeds present dormancy. the best treatments for breaking dormancy were mechanical scarification and sulfuric acid. the seeds were indifferent to the light and their germination was not influenced by the tested temperatures.
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