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Search Results: 1 - 10 of 205890 matches for " Pérsio;Nunes "
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Foraging Activity in Plebeia remota, a Stingless Bees Species, Is Influenced by the Reproductive State of a Colony
Patrícia Nunes-Silva,Sergio Dias Hilário,Pérsio de Souza Santos Filho,Vera Lucia Imperatriz-Fonseca
Psyche , 2010, DOI: 10.1155/2010/241204
Abstract: Colonies of the Brazilian stingless bee Plebeia remota show a reproductive diapause in autumn and winter. Therefore, they present two distinct reproductive states, during which colony needs are putatively different. Consequently, foraging should be adapted to the different needs. We recorded the foraging activity of two colonies for 30 days in both phases. Indeed, it presented different patterns during the two phases. In the reproductive diapause, the resource predominantly collected by the foragers was nectar. The majority of the bees were nectar foragers, and the peak of collecting activity occurred around noon. Instead, in the reproductive phase, the predominantly collected resource was pollen, and the peak of activity occurred around 10:00?am. Although the majority of the foragers were not specialized in this phase, there were a larger number of pollen foragers compared to the phase of reproductive diapause. The temperature and relative humidity also influenced the foraging activity. 1. Introduction Stingless bees collect several types of material on their foraging flights. Most of these materials have vegetal origin, as pollen, nectar, resin, latex, leaves, trichomes, fragrances, oils, seeds, and so forth. In addition, stingless bees also collect materials of other origins, as animal feces, clay, water, and fungi spores, for example [1–3]. Among all these resources, pollen, and nectar are the ones used as food [4]. In some bee species oil is also used to provision brood cells, as in Centris (Hemisiella) tarsata [5] and C. (H.) trigonoides [6]. The other materials can be used for several purposes, especially construction and protection [2, 4]. The flight activity includes waste removal, namely, to remove garbage (detritus) from the colony, besides foraging. The detritus comprise feces, old combs, dead bees, larval and pupal exuvia, among others [1, 2, 7]. The foraging behavior varies seasonally throughout the year, especially in relation to the amount of pollen collected by the colonies. Climatic factors such as temperature, light intensity, wind, rain, and relative humidity, as well as plant resource availability, influence foraging. Colony internal factors, such as population size and amount of stored food, also influence the foraging behavior of the individual bees and of the colony [2, 4, 8–12]. Several aspects of the flight and foraging activity of some stingless bee species have already been studied: (i) the influence of external and internal factors, (ii) the size and the physiology of the bees, and (iii) the effect of daily and seasonal
Opportunistic infections in patients with aids admitted to an university hospital of the Southeast of Brazil
Nobre, Vandack;Braga, Emanuella;Rayes, Abdunnabi;Serufo, José Carlos;Godoy, Pérsio;Nunes, Nívea;Antunes, Carlos Maurício;Lambertucci, José Roberto;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2003, DOI: 10.1590/S0036-46652003000200003
Abstract: opportunistic diseases in hiv-infected patients have changed since the introduction of highly active anti-retroviral therapy (haart). this study aims at evaluating the frequency of associated diseases in patients with aids admitted to an university hospital of brazil, before and after haart. the medical records of 342 hiv-infected patients were reviewed and divided into two groups: group 1 comprised 247 patients before haart and, group 2, 95 patients after haart. the male-to-female rate dropped from 5:1 to 2:1for hiv infection. there was an increase in the prevalence of tuberculosis and toxoplasmosis, with a decrease in kaposi's sarcoma, histoplasmosis and cryptococcosis. a reduction of in-hospital mortality (42.0% vs. 16.9%; p = 0.00002) has also occurred. an agreement between the main clinical diagnoses and autopsy findings was observed in 10 out of 20 cases (50%). two patients with disseminated schistosomiasis and 2 with paracoccidioidomycosis are reported. overall, except for cerebral toxoplasmosis, it has been noticed a smaller proportion of opportunistic conditions related to severe immunosuppression in the post haart group. there was also a significant reduction in the in-hospital mortality, possibly reflecting improvement in the treatment of the hiv infection.
Imunodeficiências primárias: aspectos relevantes para o pneumologista
Roxo Júnior, Pérsio;
Jornal Brasileiro de Pneumologia , 2009, DOI: 10.1590/S1806-37132009001000010
Abstract: primary immunodeficiency diseases comprise a genetically heterogeneous group of disorders that affect distinct components of the innate and adaptive immune system, such as neutrophils, macrophages, dendritic cells, complement proteins and natural killer cells, as well as t and b lymphocytes. the study of these diseases has provided essential insights into the functioning of the immune system. primary immunodeficiency diseases have been linked to over 120 different genes, abnormalities in which account for approximately 180 different forms of these diseases. patients with primary immunodeficiency diseases are most often recognized because of their increased susceptibility to infections. however, these patients can also present with a variety of other manifestations, such as autoimmune diseases, inflammatory diseases and cancer. the purpose of this article is to update the main aspects of primary immunodeficiency diseases, especially regarding the clinical manifestations related to the diagnosis, emphasizing the need for the early recognition of warning signs for these diseases.
New flavonoids and coumarins from Platymiscium floribundum Vogel
Veloso, Pérsio A.;Pimenta, Antonia T. A.;Francisco M. de, Sousa;Falc?o, Maria José C.;Gramosa, Nilce V.;Silva Junior, José Nunes da;Silveira, Edilberto R.;Lima, Mary Anne S.;
Journal of the Brazilian Chemical Society , 2012, DOI: 10.1590/S0103-50532012000700007
Abstract: two new flavonoids, 3,4,10-trihydroxy-9-methoxypterocarpan and 2',4'-dihydroxy-4-methoxy-b-hydroxychacanonol, were isolated from platymiscium floribundum, in addition to the homopterocarpin, 2',4',4-trihydroxychalcone, 7,3',5'-trihydroxyflavanone, 7,3'-dihydroxy-8,5'-dimethoxyisoflavanone, 8-hydroxy-5,6,7,-trimethoxycoumarin, 6-hydroxy-7,8-dimethoxycoumarin, 6,7,8-trimethoxycoumarin, 6,7-dimethoxycoumarin, 8-hydroxy-6,7-dimethoxycoumarin, 3β-acetoxy-28-hydroxyolean-12-ene, 1,2,3-trimethoxy-5-allyl-benzene, 3,4-dimethoxycinnamaldehyde, and β-sitosterol and stigmasterol as a mixture. structural characterization of all compounds was established on the basis of spectroscopic methods, particularly 1d and 2d nuclear magnetic resonance (nmr) and comparison with data from literature.
Estudo sobre a contribui??o da autópsia como método diagnóstico
Moreira, Daniel Ribeiro;Lana, Ana Maria Arruda;Godoy, Pérsio;
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2009, DOI: 10.1590/S1676-24442009000300009
Abstract: background: hospital autopsy rates have declined worldwide and non-perinatal autopsies have reached extremely low numbers at the university hospital of federal university of minas gerais (hc-ufmg). objectives: to determine if there has been a decrease in the relevance of autopsy at hc-ufmg. methods: a comparative study between clinical diagnoses and autopsy findings was conducted, establishing discrepancy rates with therapeutic or prognostic impact on two random samples from 80 autopsies performed at hc-ufmg in the mid 1970’s and 80 autopsies in the 1990’s, both including perinatal and non-perinatal procedures. results: non-perinatal (adult and pediatric) autopsies predominated in the 1970’s. perinatal autopsies (stillbirth and neonatal mortality) predominated in the 1990’s, with a discrepancy rate of 56%. partial discrepancies, with correct classification of congenital malformations by autopsy, were the most frequent. there were no discrepancies in most pediatric autopsies from the 1970’s. however, most pediatric autopsies from the 1990’s revealed discrepancies. as to the adults, the frequency of diagnostic errors did not change significantly from 1970’s (68%) to 1990’s (57%). bacterial infections and pulmonary embolism were common conditions that were not clinically diagnosed in the 1970’s; in the 1990s, the post mortem diagnoses comprised a heterogeneous group of diseases. conclusion: autopsies remain as a useful diagnostic tool in spite of its restricted use currently. the rates of non-perinatal autopsies need urgent improving in order to avoid deleterious effects on medical education, research and quality control of medical care.
Studies on the acid activation of Brazilian smectitic clays
Valenzuela Díaz, Francisco R.;Santos, Pérsio de Souza;
Química Nova , 2001, DOI: 10.1590/S0100-40422001000300011
Abstract: fuller's earth and acid activated smectitic clays are largely used as bleaching earth for the industrial processing of vegetable, animal and mineral oils and waxes. the paper comments about the nomenclature used for these materials, the nature of the acid activation of smectitic clays (bentonites), activation laboratory procedures and presents a review of the acid activation of bentonites from 20 deposits from several regions of brazil. the activated clays were tested and show good decolorizing power for soybean, castor, cottonseed, corn and sunflower oils.
Hipertens?o Portopulmonar e Gravidez
Godoy, Pérsio;Martins, Guilherme Milhomem;Lauria, Márcio Weissheimer;
Revista Brasileira de Ginecologia e Obstetrícia , 2002, DOI: 10.1590/S0100-72032002000400009
Abstract: the severity of the association of pulmonary hypertension with pregnancy is well known. pulmonary arterial hypertension constitutes one of the highest risk conditions for maternal mortality in late pregnancy and postpartum. patients with portal hypertension of varying etiology may develop pulmonary arterial hypertension (portopulmonary hypertension) and most cases present cirrhosis as the underlying disease; however, a few cases of noncirrhotic etiology have been described. clinical and pathological findings in two cases of portopulmonary hypertension and pregnancy are presented here. the two patients (30 and 24 years old) developed severe right heart failure and shock just after the delivery and the disease progressed rapidly to death. autopsy demonstrated fibrosis in hepatic portal tracts, as has been described in cases of idiopathic portal hypertension. also, pulmonary hypertension classified as plexogenic was reported.
Um estudo das tendências e incertezas do setor de transportes rodoviários de cargas no Brasil por meio da stakeholder analysis
Martins,Pérsio; Boaventura,Jo?o; Costa,Benny; Donaire,Denis;
Revista Portuguesa e Brasileira de Gest?o , 2009,
Abstract: the objective of this study is to present a panorama of the freight highway transportation industry in brazil that shows how the different agents of this sector are engaged. the focus of this analysis is transportation companies. the transportation infrastructure of a nation is a vital element in terms of its developments, and in the brazilian case the freight highway transportation is one of the most relevant transport modes. the method employed in the study was the stakeholder analysis and the data collection was mostly through in-depth structured interviews with experts of the different agents involved in the transportation industry belonging to different stakeholder groups. the founding showed that the stakeholder analysis is an operational method for this kind of study. regarding to the industry, the research revealed the main stakeholders are the government, the logistic operators, the customers, and the industry associations. the more relevant uncertainties of the industry regards to the government policies, the customers actions and the logistics operators strategy.
Associa??o de leishmaniose visceral e hepatite B de curso fulminante: relato de um caso
Godoy, Pérsio;Salles, Paulo Guilherme de Oliveira;
Revista da Sociedade Brasileira de Medicina Tropical , 2002, DOI: 10.1590/S0037-86822002000500015
Abstract: the case of a 20-year-old man with hepatoesplenomegaly, fever and severe hepatic insufficiency is reported. histopathological and immunohistochemical studies of tissue specimens obtained at autopsy led to diagnosis of visceral leishmaniasis and fulminant hepatitis b. the authors pointed out a possible influence of immunological response related with visceral leishmaniasis in development of severe hepatic involvement by hepatitis b virus
Hipertens o Portopulmonar e Gravidez
Godoy Pérsio,Martins Guilherme Milhomem,Lauria Márcio Weissheimer
Revista Brasileira de Ginecologia e Obstetrícia , 2002,
Abstract: A gravidade da coexistência de hipertens o pulmonar e gravidez está bem estabelecida. A hipertens o arterial pulmonar constitui condi o com elevado risco de morte materna no final da gravidez e pós-parto. Pacientes portadores de hipertens o portal de várias etiologias podem desenvolver hipertens o arterial pulmonar (hipertens o portopulmonar), sendo a maioria dos casos relatados na cirrose hepática, entretanto uns poucos casos foram descritos na hipertens o portal n o cirrótica. S o apresentados o quadro clínico e anatomopatológico em dois casos de hipertens o portopulmonar e gravidez. Tratava-se de pacientes com 30 e 24 anos de idade, que desenvolveram insuficiência cardíaca direita grave e choque no puerpério imediato, evoluindo rapidamente para o óbito. A necropsia demonstrou em ambos os casos fibrose nos espa os portais, correspondendo ao relatado na hipertens o portal idiopática, além de hipertens o pulmonar classificada como plexogênica.
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