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Search Results: 1 - 10 of 67031 matches for " José Ruivo "
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Tuberculose primária da mama: A propósito de um caso clinico
álvares,Emília; Furtado,Sofia; Valen?a,Jo?o; Gon?alves,José Rosal; Ruivo,A Pais;
Revista Portuguesa de Pneumologia , 2008,
Abstract: tuberculosis of the breast is an uncommon disease. the authors present a case of an asymptomatic 64 year-old patient whose mammography showed a right breast nodule which needed aetiological investigation. complementary diagnostic exams did not lead to a differential diagnosis between granulomatous lesion and breast carcinoma; nodule aspiration results suggested tuberculosis of the breast but were unclear and so tuberculosis antibiotics were initiated. no other tuberculosis infectious focus was found at clinical-laboratory evaluation. imagiology progress was favourable, so patient continued treatment. the authors highlight the low rate of primary tuberculosis of the breast and make a brief reference to the pathology, which has a low rate of microbiological and pathological-anatomical identification.
Gastroenterite eosinofílica: divertículo duodenal intraluminal como fator predisponente?
Lima,Jandira; Rebelo,Marta; Castellano,Amparo; Mota,Joana; Ruivo,Catarina; Dias,Patricia; Vieira,José; Silva,Mário; Costa,José;
Jornal Português de Gastrenterologia , 2012,
Abstract: eosinophilic gastroenteritis is a rare and heterogeneous disorder, with a variable clinical spectrum ranging between the presence of common gastrointestinal symptoms and occlusive pyloric or intestinal disease. it is characterized by inflammatory eosinophilic infiltration in at least one segment of the digestive tract and is probably underdiagnosed, as it poses some approach problems. intraluminal duodenal diverticulum, a rare congenital malformation, which is usually found incidentally in radiological studies, is a ‘‘cul de sac’’ structure projecting into de duodenal lumen. we revise these two entities, and a possible relation between them, by discussing a case presenting with fever of unknown origin, with scarce and uncharacteristic symptoms.
Microbial biomass and soil chemical properties under different land use systems in northeastern Pará
Lopes, Elessandra Laura Nogueira;Fernandes, Antonio Rodrigues;Lourdes Pinheiro Ruivo, Maria de;Cattanio, José Henrique;Souza, Gladys Ferreira de;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000400006
Abstract: the increase in agricultural production in the brazilian amazon region is mostly a result of the agricultural frontier expansion, into areas previously influenced by humans or of native vegetation. at the same time, burning is still used to clear areas in small-scale agricultural systems, leading to a loss of the soil productive capacity shortly after, forcing the opening of new areas. this study had the objective of evaluating the effect of soil preparation methods that involve plant residue shredding, left on the surface or incorporated to the soil, with or without chemical fertilization, on the soil chemical and biological properties. the experiment was conducted in 1995, in an experimental field of yellow latosol (oxisol) of the embrapa amaz?nia oriental, northeastern pará (brazil). the experiment was arranged in randomized blocks, in a 2x6 factorial design, with two management systems and six treatments evaluated twice. the management systems consisted of rice (oriza sativa), followed by cowpea (vigna unguiculata) with manioc (manihot esculenta). in the first system the crops were planted in two consecutive cycles, followed by a three-year fallow period (natural regrowth); the second system consisted of one cultivation cycle and was left fallow for three years. the following treatments were applied to the secondary forest vegetation: slash and burn, fertilized with npk (q+npk); slash and burn, without fertilizer npk (q-npk); cutting and shredding, leaving the residues on the soil surface, fertilized with npk (c+npk); cutting and shredding, leaving residues on the soil surface, without fertilizer (c-npk); cutting and shredding, with residue incorporation and fertilized with npk (i+npk); cutting and shredding, with residue incorporation and without npk fertilizer (i-npk). the soil was sampled in the rainier season (april 2006) and in the drier season (september 2006), in the 0-0.1 m layer. from each plot, 10 simple samples were collected in order to generate a co
Poderes locais em perspectiva comparada
Fernando Ruivo,Daniel Francisco
Revista Crítica de Ciências Sociais , 2012,
Abstract: “Os romances n o come am como queremos, mas como eles querem”, afirmou Gabriel Garcia Marquez. Similarmente, as nossas vidas nunca decorrem como individualmente as tínhamos pensado, desejado e planeado. Ora, tal como as nossas vidas, também as reformas político-administrativas e as políticas públicas territorializadas n o come am, deve dizer-se, como queremos, isto é, como pensámos, desejámos e planeámos, mas em boa parte como elas querem, como se tivessem, afinal, alguma vida própria, a qual...
Uso de resíduos de madeira como alternativa de melhorar as condi??es ambientais em sistema de reflorestamento
Monteiro, Kátia Fernanda Garcez;Kern, Dirse Clara;Ruivo, Maria de Lourdes Pinheiro;Rodrigues, Tarcísio Ewerton;Cometti, José Luis Said;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000300001
Abstract: a substantial portion of soils in the amazon has low fertility and high acidity indexes. the low levels of technology used in land management and in the use of fire has been pointed out as the main cause of alteration of areas covered by forests. inadequate soil management, either while planting forest species or agricultural crops, leads to environmental modifications, such as erosion, water pollution and loss of nutrients and biodiversity. despite the difficulty to measure the degree of recovery of those areas, we may assume that an altered area, whatever environment or land use type it is submitted, would be in recovery phase when the status of its organic matter is improving. this can be measured through soil biological indicators such as levels of organic matter and nutrients, and activity of the microbiological biomass. it also influences the quality of the planted specimens in terms of tree diameter and height, and aerial biomass. areas currently under recovery or recovered in their edaphological properties can be compared, through the use of bioindicators, to soils enriched with organic material from organic soil management in the past, such as forest systems planted in areas of black earths. this comparison, besides validating soil quality indicators, will be helpful in studies involving rational use of both natural and planted forests.
Influência de variáveis meteorológicas na produ??o de liteira na Esta??o Científica Ferreira Penna, Caxiuan?, Pará
Silva, Rosecélia Moreira da;Costa, José Maria Nogueira da;Ruivo, Maria de Lourdes Pinheiro;Costa, Antonio Carlos L?la da;Almeida, Samuel Soares;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000300012
Abstract: the evaluation of the influence on the exclusion of rainfall on the variation of litter production was done in caxiuan? forest reserve at ferreira penna scientific station (1o 42 ' s, 51o 31 ' w) during the period from march, 2001 to february, 2003 with the objective of identifying the main meteorological variables and the main components of the monthly water balance that affected the production and decomposition of litter. this work was part of the subproject experiment of drought in the forest (esecaflor), that aimed to study the long term impacts of drought on the water, energy and carbon dioxide fluxes in the amazon forest. the sazonality of total litter production and its components (leaves, brushwood and reproductive parts) was well established, with the occurrence of a greater litter production during the months with lower precipitation. the monthly litter production during the experimental period ranged from 294.78 kg.ha-1 to 1758.69 kg.ha-1, with an average of 777.70 kg.ha-1. the total litter production was partitioned in leaves (61.40 %), brushwoods (18.45 %) and reproductive parts (20.14 %). the results obtained in the undisturbed plot showed a higher litter production, about 25 %, compared to the litter production in the plot under the exclusion of water. the variables more strongly correlated with litter production and its components were wind speed, global solar radiation density flux, photosynthetic active radiation density flux, soil temperature at 5 cm depth, precipitation, soil water deficit and water surplus.
Kaons and pions in strange quark matter
Pedro Costa,Maria C. Ruivo
Physics , 2001, DOI: 10.1209/epl/i2002-00272-8
Abstract: The behavior of kaons and pions in strange quark matter in weak equilibrium, is investigated within the SU(3) Nambu-Jona-Lasinio [NJL] model. This work focuses a region of high densities where the behavior of mesons has not been explored in the framework of this model. It is found that above the density where strange valence quarks appear in the medium, $\rho = 3.8 \rho_0$, a change of behavior of different observables is observed indicating a tendency to the restoration of flavor symmetry. In particular, the splitting between charge multiplets, $K^+, K^-; K^0, {\bar K^0} {and} \pi^+, \pi^-$ decrease and the low energy modes with quantum numbers of $K^-, \bar K^0 {and} \pi^+$, which are excitations of the Fermi sea, are less relevant than for lower densities.
Preventive but Not Curative Efficacy of Celecoxib on Bladder Carcinogenesis in a Rat Model
José Sereno,Belmiro Parada,Flávio Reis,Fernanda X. Cunha,Edite Teixeira-Lemos,Patrícia Garrido,Rui Pinto,Petronila Rocha-Pereira,Paula Neto,José Ruivo,Paulo Rodrigues-Santos,Sara Nunes,Alfredo Mota,Arnaldo Figueiredo,Frederico Teixeira
Mediators of Inflammation , 2010, DOI: 10.1155/2010/380937
Abstract: To evaluate the effect of a cyclooxygenase 2 inhibitor, celecoxib (CEL), on bladder cancer inhibition in a rat model, when used as preventive versus as curative treatment. The study comprised 52 male Wistar rats, divided in 5 groups, during a 20-week protocol: control: vehicle, carcinogen: 0.05% of N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN), CEL: 10?mg/kg/day of the selective COX-2 inhibitor Celebrex, preventive CEL (CEL+BBN-P), and curative CEL (BBN+CEL-C) groups. Although tumor growth was markedly inhibited by the preventive application of CEL, it was even aggravated by the curative treatment. The incidence of gross bladder carcinoma was: control 0/8(0%), BBN 13/20(65%), CEL 0/8(0%), CEL+BBN-P 1/8(12.5%), and BBN+CEL-C 6/8(75%). The number and volume of carcinomas were significantly lower in the CEL+BBN-P versus BBN, accompanied by an ample reduction in hyperplasia, dysplasia, and papillary tumors as well as COX-2 immunostaining. In spite of the reduction of tumor volumes in the curative BBN+CEL-C group, tumor malignancy was augmented. An anti-inflammatory and antioxidant profile was encountered only in the group under preventive treatment. In conclusion, preventive, but not curative, celecoxib treatment promoted a striking inhibitory effect on bladder cancer development, reinforcing the potential role of chemopreventive strategies based on cyclooxygenase 2 inhibition. 1. Introduction Bladder cancer is a prevalent tumor, accounting for 5%–10% of all malignancies in Western countries [1, 2]. It has a high recurrence and progression rate and the prognosis, except for superficial forms, is poor [3]. Furthermore, it has high mortality rates and socioeconomic costs [4, 5]. The conventional surgical techniques and therapeutic options might cause discomfort to patients, especially in invasive and aggressive forms of cancer [6, 7]. Therefore, the improvement of bladder cancer management and treatment could rely on better preventive strategies. The identification of promising drugs remains dependent on a better elucidation of the molecular/cellular mechanisms underlying cancer appearance and progression [8, 9]. Apart from the genetic features and markers already characterized [10, 11], the cellular and molecular mechanisms for development and/or progression might involve inflammatory, proliferative, and oxidative stress phenomena that should be better elucidated. Inflammation through the cyclooxygenase (COX) pathway has been involved in cancer development [12]. While COX-1 is constitutively expressed in a huge range of tissues, playing a role in
Variabilidade sazonal da condutancia estomática em um ecossistema de manguezal amaz?nico e suas rela??es com variáveis meteorológicas
Rodrigues, Hernani José Braz?o;Costa, Rafael Ferreira da;Ribeiro, Jo?o Batista Miranda;Souza Filho, José Danilo da Costa;Ruivo, Maria de Lourdes Pinheiro;Silva Júnior, Jo?o de Athaydes;
Revista Brasileira de Meteorologia , 2011, DOI: 10.1590/S0102-77862011000200003
Abstract: this work investigated the variations of stomatal conductance (gs) in the rainy and dry seasons and its dependence relations with meteorological variables measured in an amazonian mangrove ecosystem. data were originated from the ecobioma project, part of the large scale biosphere-atmosphere experiment in amazon (lba). stomatal conductance followed the tendency of the radiation balance variation, reaching maximum values during the day and minimum values at night. the conductance showed greater fluctuations in the rainy season, with mean value of gs = 0.015 m s-1, however smaller in magnitude than in the dry season. during the dry season, the mean value was gs = 0.027 m s-1, with lower range, varying between 0.010 and 0.042 m s-1. the meteorological variables used for establishing the dependence relations with the daily variability of stomatal conductance were the following; specific moisture deficit (δq), vapor pressure deficit (pvd), net radiation (rn) and wind velocity (vv). the pvd showed the best correlation with gs, with r2 = 0.99 for both periods. in spite of the importance of vv in the gaseous changes between the vegetation and the atmosphere, it presented the smallest influence in the mean variation of the gs, with r2 = 0,44 for the rainy and r2 =0,51 for the dry period.
Hospital-Adapted Clonal Complex 17 Enterococcus Faecium Found among Sand Enterococcal Isolates  [PDF]
Daniela Pinto, Marta Ruivo, Peter Vandamme, Maria de F. S. Lopes
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.31010
Abstract: Though poorly studied, sand is an environment with an extended degree of interaction with man. Enterococcal strains can be found in sand but we do not know to what extent these ubiquitous opportunistic nosocomial pathogens isolated from sand carry antimicrobial resistances and virulence traits. In an attempt to fill in this knowledge gap, two distinct types of sand (beach and children playground) were examined concerning composition in enterococcal species, genetic diversity of isolates and abundance of resistance to antimicrobials and virulence traits. Five different species were found, namely Enterococcus faecium, Enterococcus faecalis, Enterococcus hirae, Enterococcus flavescens and Enterococcus casseliflavus. Although genetic diversity was evident, two different E. faecium clones, common to the two types of sand, were detected, suggesting the existence of clones well adapted to this specific environment or from a common source. E. faecium was associated with multiple antibiotic resistances, including to fluoroquinolones and tetracycline that are commonly used by veterinarians and clinicians. Among the multiresistant E. faecium strains from beach sand, two were from sequence type (ST) 442, which belongs to the wide-spread Hospital-adapted clade CC17. They both carried the esp gene and the genomic island associated with CC17. The other virulence factors screened were disseminated among E. faecalis strains, but seldom detected in the other species, evidencing the existence, in these environments, of E. faecalis strains carrying the same virulence factors as the clinical ones. The present work thus stresses the need to follow-up the presence and characterization of enterococcal strains from both beach and children playground sands and of including these environments in the epidemiological global analysis of enterococcal isolates.
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