726 research outputs found
Associação Rara Entre Intussuscepção E Doença Celíaca Em Criança
Intussusception is a common cause of acute intestinal obstruction in the pediatric population and it is normally idiopathic. Rare cases of chronic intussusception require investigation with greater attention. CASE REPORT: We present a clinical case of a three-year-old boy with aqueous diarrhea, abdominal distension, vomiting and weight loss over a two-month period. During the investigation, abdominal ultrasound showed imaging of intussusception. The intraoperative findings showed the intussusception had resolved spontaneously. In further investigation, it was found that the diarrhea was malabsorptive and, after the patient underwent upper gastrointestinal endoscopy, a diagnosis of celiac disease was made. After a gluten-free diet was introduced, the patient showed complete remission of symptoms and regained weight, and normal growth was reestablished. CONCLUSION: If the clinical presentation of intussusception is unusual, etiological investigation should be undertaken. In this case report, celiac disease was the underlying cause. © 2016, Sao Paulo Medical Journal. All rights reserved.134545746
A Comparison between Dual Phase Steel and Interstitial Free Steel Due To the Springback Effect
International audienceThis is a study of the springback effect on two kinds of high strength steel, which are: dualphase and interstitial free, currently used as feedstock in the production of vehicles. The mechanical characterization of the springback effect was performed by means of a mechanical conformation test, called three-point air bending, performed by adapting it to the unconstrained cylindrical bending test. It was also evaluated the mechanical properties of the material defined by the tensile test in order to determine its tensile strength, yield strength, and elongation. Furthermore, it was performed a microstructural characterization of advanced steels by identifying and quantifying the present phases in coexistence by means of digital image processing. The results indicate that the springback effect in the dual-phase steel has the highest springback rates due to its high mechanical strength, and it causes a decrease in the aspect ratio of the grains that suffered mechanical conformation attempting to return it to its original form. On the other hand, the springback effect has the lowest rates, and the change in aspect ratio depends only on the interstitial free steel elongation capacity due to its lower mechanical strength
Green manure legumes affect seasonal soil and leaf CO2 exchange rates in an olive rainfed orchard
Management methods that decrease requirement for agricultural chemicals are needed
to reduce adverse environmental impacts. Moreover, they can play an important role in
atmospheric C02 emission and fixation. We propose green manure legumes to reduce
erosion, soil compaction and nitrate pollution, to improve biodiversity, soil carbon sink
and fertility, to save fossil fuels and to increase yield and the nutritional value of food
products. The research was carried out near Mirandela, Northeast Portugal, on a 15-
year commercial olive orchard (Olea europaea L. cv. Cobrançosa), grown under
rainfed conditions
Sustainable management of olive rainfed orchards by the introduction of leguminous cover crops
The olive sector has a crucial economic, social, cultural and ecological relevance in the
Mediterranean region, where tillage and herbicides application are still generalized practices.
However, these practices oppose the recommendations of UE Common Agricultural Policy and thus,
management methods that decrease requirement for agricultural chemicals are needed to reduce
adverse environmental impacts. Moreover, they can play an important role in atmospheric C01
emission and fixation. We propose green manure legumes to reduce erosion, soil compaction and
nih·ate pollution, to improve biodiversity, soil carbon sink and fertility, to save fossil fuels and to
increase yield and the safety and nutritional value of food products. The 3-yearfield study carried out
in Northeast Portugal revealed that self-reseeding annual legumes is a promising strategy since
increase the summer soil water content, the vegetative growth and the physiological tree pe1jormance,
that was reflected in a 38% higher cumulative yield then tillage techniques.PTDC-AGR-AAM/098326/200
Sequestro de carbono no olival: mito ou realidade?
O homem, através de diversas atividades econom1cas, tem contribuído para o
aumento da concentração de dióxido de carbono (C02) na atmosfera. A queima de
combustíveis fósseis, o fabrico de cimento a partir de carbonatos e a desflorestação com
expansão da área agrícola são as principais atividades humanas associadas à emissão de C02
para a atmosfera . O C02 é um gás com efeito de estufa, capaz de reter radiação térmica,
contribuindo para o aquecimento global. Para mitiga r o aquecimento global têm vindo a ser
promovidos mecanismos que retirem carbono (C) da atmosfera e o fixem em formas inertes
nos ecossistemas terrestres. O sequestro de carbono ocorre principalmente através da
fotossíntese em que organismos fotossintéticos como as plantas fixam carbono e libertam
oxigénio para a atmosfera. A vegetação terrestre e os solos podem, assim, constituir-se
como importantes reservatórios de carbono e contrariar a tendência de aumento da
concentração de C02 na atmosfera.
Atendendo a que os apoios comunitários na nova PAC serão sobretudo concedidos
em função dos serviços ecossistémicos que os diferentes setores prestarem à sociedade e
que o sequestro de carbono é um dos principais serviços ecossistémicos que a agricultura
pode prestar, apresenta-se uma estimativa do carbono que um olival tradicional de sequeiro
(árvores mais solo) pode fixar nos primeiros 10 anos de vida a seguir à instalação. Foi tido
em conta a quantidade de folhas, raminhos, casca e lenho de cada um dos diversos
componentes da árvore, a percentagem de matéria orgânica e o teor de carbono na matéria
orgânica de cada um daqueles componentes. No solo, foi tido em conta o potencial de
acumulação de carbono no solo estimado a partir de uma situação inicial de solo mobilizado
passando para uma situação em que se permite o desenvolvimento de vegetação herbácea
no coberto.
Assim, uma árvore bem desenvolvida com 10 anos de idade representa uma
quantidade de carbono de 9, 71 kg árvore·1 [75% na parte aérea (medida) e 25% na parte
radicular (estimada)], o que representa 2,0 t C _ha·1
• No solo, se durante 10 anos forem
implementadas medidas que promovam o acréscimo em 1% no teor de matéria orgânica do
solo (profundidade 0-20 cm) relativamente à massa total do solo, serão fixadas 14 t C ha-1
Comparing N recovery from legumes grown as green manures in olive orchards
Green manuring is probably the only option for extending on a great scale the acreage of organic
fanning in the perennial crops of the Mediterranean basin such as olive groves. Olive growers, in
general, do not have animals so the availability of organic manures is not sufficient to maintain soil
fertility. In addition, the organic composts approved for organic farming on the market have high
prices and are sometimes speculative, in relation to their fertiliser value (Rodrigues et al., 2006). In
NE Portugal there is a long tradition in the cultivation of white lupin (Lupinus a/bus) as a means of
improving soil fertility. However, little is known about the dry matter yield and N fixation potential
of lupin in these agrosystems, and also of the transfer of fixed N to the trees. In this work the results
of dry matter yield and N recovery by lupin, vetch (Vicia villosa) and a mixture of self-reseeding
annual legumes are presented. The trial also included plots of oats (Avena saliva) and natural
vegetation
Were equatorial regions less affected by the 2009 influenza pandemic? The Brazilian experience
Although it is in the Tropics where nearly half of the world population lives and infectious disease burden is highest, little is known about the impact of influenza pandemics in this area. We investigated the mortality impact of the 2009 influenza pandemic relative to mortality rates from various outcomes in pre-pandemic years throughout a wide range of latitudes encompassing the entire tropical, and part of the subtropical, zone of the Southern Hemisphere (+5°N to −35°S) by focusing on a country with relatively uniform health care, disease surveillance, immunization and mitigation policies: Brazil. To this end, we analyzed laboratory-confirmed deaths and vital statistics mortality beyond pre-pandemic levels for each Brazilian state. Pneumonia, influenza and respiratory mortality were significantly higher during the pandemic, affecting predominantly adults aged 25 to 65 years. Overall, there were 2,273 and 2,787 additional P&I- and respiratory deaths during the pandemic, corresponding to a 5.2% and 2.7% increase, respectively, over average pre-pandemic annual mortality. However, there was a marked spatial structure in mortality that was independent of socio-demographic indicators and inversely related with income: mortality was progressively lower towards equatorial regions, where low or no difference from pre-pandemic mortality levels was identified. Additionally, the onset of pandemic-associated mortality was progressively delayed in equatorial states. Unexpectedly, there was no additional mortality from circulatory causes. Comparing disease burden reliably across regions is critical in those areas marked by competing health priorities and limited resources. Our results suggest, however, that tropical regions of the Southern Hemisphere may have been disproportionally less affected by the pandemic, and that climate may have played a key role in this regard. These findings have a direct bearing on global estimates of pandemic burden and the assessment of the role of immunological, socioeconomic and environmental drivers of the transmissibility and severity of this pandemic
Estudos sobre a nutrição mineral do arroz: XV. absorção radicular e foliar do radiofosforo pelas variedades IAC-47 e IAC-435
Foram estudados os efeitos do tempo e da concentração iônica externa na absorção do radiofósforo por raízes destacadas e por plantas inteiras de arroz das variedades IAC-47 (sequeiro) e IAC-435 (irrigado). No intervalo de 30 a 180 min. houve linearidade na absorção. O valor de km para as duas variedades foi o mesmo sendo, porém, menor quando se empregaram raízes destacadas. Não se encontrou diferença significativa na absorção foliar do fosfato monoamônico ou diamônico em ausência ou em presença de uréia.Root uptake either by excised roots or by intact young plants (3-4 week old) showed linearity in the period from 30 to 180 minutes of contact with the solution. Km values were the same for both varieties being, however, slightly lower in the case of excised roots. Foliar uptake was affect neither by source (monoammonium against diammonium phosphate) nor by the presence of urea in the same solution
Goats in a comfortable and stressed environment consuming saline water: performance, digestibility, nitrogen balance, and urinary mineral concentrations
ABSTRACT The objective was to evaluate the effect of water salinity and environmental temperature on the nutrient consumption, digestibility, nitrogen balance, and mineral excretion of creole goats. Thirty-six males with an average age of 5.0±0.6 months and an average weight of 20.0±2.3kg were housed in metabolic cages. They are distributed in a completely randomized design, with a 2×3 type crossover (2 temperatures (T1 = 26±0.6ºC and T2 = 32±1.2ºC) and three levels of salinity (1.0, 6.0, and 12.0 dS m-1). The temperature influenced (P0.05) of temperatures or water salinity levels; the animals consumed and retained averages of 10.31 and 4.19 g day-1 of nitrogen in the body, respectively. The different water salinity levels influenced (P<0.05) water intake and increased the excretions of potassium and sodium in urine. Total solids levels ranging from 640 to 9,600mg L-1 in water for goats increase water consumption, as does urine potassium and sodium excretion in urine
Integration of DFDs into a UML - based model-driven engineering approach
The main aim of this article is to discuss how the functional and the object-oriented views can be inter-played to represent the various modeling perspectives of embedded systems.We discuss whether the object-oriented modeling paradigm, the predominant one to develop software at the present time, is also adequate for modeling embedded software and how it can be used with the functional paradigm.More specifically, we present how the main modeling tool of the traditional structured methods, data flow diagrams, can be integrated in an object-oriented development strategy based on the unified modeling language. The rationale behind the approach is that both views are important for modeling purposes in embedded systems environments, and thus a combined and integrated model is not only useful, but also fundamental for developing complex systems. The approach was integrated in amodel-driven engineering process, where tool support for the models used was provided. In addition, model transformations have been specified and implemented to automate the process.We exemplify the approach with an IPv6 router case study.FEDER -Fundação para a Ciência e a Tecnologia(HH-02-383
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