Peritoneal Dialysis-Related Peritonitis Due to Staphylococcus aureus: A Single-Center Experience over 15 Years

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Study of the evolution of the placenta and fetal pancreas in the pathophysiology of growth retardation intrauterine due to restricted maternal diet

CONTEXTO: O retardo do crescimento intra-uterino (RCIU) continua sendo importante problema em perinatologia neste final de século. A natureza do agente etiológico, o período da gestação em que ocorreu o insulto e a sua duração influenciam o tipo de RCIU. OBJETIVO: Estudar a fisiopatologia do retardo de crescimento intrauterino (RCIU) em ratas, decorrente da restrição protéico-calórica materna, em relação à evolução do pâncreas fetal e placenta entre o 18o e 21o dias de prenhez. TIPO DE ESTUDO: Ensaio clínico randomizado em animal de laboratório. PARTICIPANTES: 41 ratas prenhes, normoglicêmicas, da raça Wistar. INTERVENÇÃO: Constituíram-se seis grupos experimentais: controle, com dieta ad libitum e cesárea, respectivamente, no 18º e 21º dias; grupos dieta restritiva a 25% introduzida no 1o dia da prenhez e cesárea no 18o e 21o dias; grupos com a mesma restrição, porém iniciada no 3o dia, com cesárea no 18o e 21o dias. VARIÁVEIS ESTUDADAS: Os recém-nascidos foram classificados, em relação à média mais ou menos um desvio padrão do grupo controle, em peso pequeno (PIP), adequado (AIP) e grande (GIP) para a idade de prenhez; as placentas foram pesadas e processadas para estudo histopatológico, incluindo morfologia e histoquímica, e os pâncreas fetais, para estudo morfológico. RESULTADOS: A desnutrição protéico-calórica materna causou RCIU após o 18o dia da prenhez. Antes desse período não ocorreu RCIU, porque a desnutrição materna diminuiu o número da prole e a placenta tornou-se vicariante. A restrição alimentar não interferiu com a morfologia do pâncreas fetal, e o estudo imunohistoquímico da placenta mostrou que, quando a restrição é introduzida no 1o dia de prenhez, os estoques de glicogênio também não sofrem alterações, diminuindo entre o 18o e 21o dias, como na prenhez normal. A restrição no 3o dia cursou com baixas concentrações de glicogênio placentário no 18o dia e desaparecimento no 21o dia. CONCLUSÃO: A fisiopatologia do RCIU, decorrente da restrição protéico-calórica materna em ratas, está relacionada com menor peso placentário e baixos estoques de glicogênio placentário.

Facial and dental injuries due to dog bite in a 15-month-old child with sequelae in permanent teeth: a case report

This article reports a longitudinal follow-up of a 15-month-old child with dental trauma resulting from an attack by a dog. The injury consisted of laceration of the facial tissues and loss of the upper central deciduous incisors, in addition to loss of bone tissue in the same area. A malformation of the crown of the right central permanent incisor and complete change of the shape of the left central permanent incisor were observed. The etiological factors of childhood injuries as well as the importance of dental emergency care are discussed and the 14-year clinical and radiographic follow up of the case is presented.

Biological effects of Ocimum gratissimum L. are due to synergic action among multiple compounds present in essential oil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Anaphylaxis Due to Pachycondyla goeldii Ant: A Case Report

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fish community alterations due to pollution and damming in Tiete and Paranapanema rivers (Brazil)

The Tiete River crosses the metropolitan region of São Paulo (Brazil) and receives a large amount of pollution, in contrast to Paranapanema River which runs in a less populated area. In the inferior portions of the basins of these rivers, a series of reservoirs has been built for hydroelectric energy generation which improve the water quality due to the decantation of suspended soils and aeration in the water spills.Twenty-nine sampling sites were established along the two rivers and in each sampling site, two groups of eight gillnets were used with standardized sizes in two seasons: winter (dry season: June-September 1994) and summer (rainy season: December-March 1995). The fishes were measured and weighed.Twenty-five parameters related. to the water were recorded. PCA and cluster analysis helped to identify two groups of sampling sites. The first one corresponds to the rainy season samples, while the second corresponds to the dry season samples, so evidencing strong seasonal environmental variation. However, the dry season group is still divided into polluted and non-polluted sites, showing that during drought there are larger effects of pollutant concentration due to the decreased flow.A total of 415 kg of fish were caught, corresponding to 8324 individuals belonging to 64 different species, in 22 families and four orders of Teleostei. The largest catches occurred in the middle Tiete River. The catches in the reservoirs of the Tiete River, during the rainy season are superior to those of the dry season. on the other hand, sampling sites located in running water presented an inverse pattern with the largest catches in the dry-season. In river Paranapanema, catches are lower than in the Tiete River, except in Rosana Reservoir during the rainy season. Fish diversity was shown to be a good-indicator of environmental stress. In Tiete River an expressive fall in species richness was detected in the polluted stretches, with dominance of one or two species. In the intermediary stretches, the presence of rapids increases the amount of dissolved oxygen, allowing the development of the most abundant and diverse fish community of the river. Fish communities in the reservoirs of the inferior stretch of Tiete River are more diverse. on the other hand, the damming of the superior reaches of Paranapanema River provoked a decrease in diversity. 0 the whole, types of local fish communities detected, showing different compositions and specific abundances, revealed different ecological situations. A discriminant analysis revealed that the parameters of the water influencing the fish community were: dissolved oxygen, conductivity, nitrogen (nitrate, ammoniacal and albuminoid), phosphate, alkalinity, hardness and iron. Copyright (C) 2003 John Wiley Sons, Ltd.

Microhardness change of enamel due to bleaching with in-office bleaching gels of different acidity

Objective. The aim of this study was to assess the enamel microhardness treated with three in-office bleaching agents, containing 35% hydrogen peroxide with different acidity. Materials and methods. Bovine incisors were divided into three groups that received the following bleaching agents: Whiteness HP, Total Bleach and Opalescence Xtra. Three gel applications/10-min each, totaling 30-min of bleaching treatment, were made on the teeth and activated with a blue LED (1000 mW/470 nm) combined to a LASER (120 mW/795 nm) device (Easy Bleach-Clean Line). Vickers hardness (VH) was evaluated at baseline and after the bleaching procedure. The values of Hardness loss [HNL] (% reduction) were calculated. The two-sample t-test was used for comparison of the HNL of the three bleaching products (5% level of significance). Results. The Opalescence Xtra, which had the lowest pH value (pH = 4.30), showed a significant increase of HNL when compared with Total Bleach bleaching agent, which had the highest pH value (pH = 6.62). Conclusions. The 35% hydrogen peroxide bleaching agents resulted in a reduction in surface enamel microhardness and bleaching with the most acid agent resulted in a significant enamel hardness loss compared to the less acid agent (4.30 vs 6.62). Strategies proposed to reduce the enamel loss after bleaching treatment may include the use of daily fluoride therapy, mouth rinsing (fluoride, milk and sodium bicarbonate solution), fluoride/bicarbonate dentifrices without abrasives, do not toothbrush immediately after bleaching, fluorides and calcium add to bleaching agents.

Lepton transverse polarization in the B -> Dl nu(l) decay due to the electromagnetic final state interaction

The effect of lepton transverse polarization in B-0-->D(-)l(+)nu(l), B+-->(D) over bar (0)l(+)nu(l) decays (l=tau,mu) is analyzed within the framework of the standard model in the leading order of heavy quark effective theory. It is shown that a nonzero transverse polarization appears due to the electromagnetic final state interaction. The diagrams with intermediate D,D* mesons contributing to the nonvanishing P-T are considered. Regarding only the contribution of these mesons, the values of the tau-lepton transverse polarization averaged over the physical region in the B-0-->D(-)tau(+)nu(l) and B+-->(D) over bar (0)tau(+)nu(l) decays are equal to 2.60x10(-3) and -1.59x10(-3), respectively. In the case of muon decay modes the values of [P-T] are equal to 2.97x10(-4) and -6.79x10(-4).

Increase of temperature of an ideal nondegenerate quantum gas in a suddenly expanding box due to energy quantization

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Particle creation due to tachyonic instability in relativistic stars

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

A review of new vibration issues due to non-ideal energy sources

We analyze the dynamical coupling between energy sources and structural response that must not be ignored in real engineering problems, since real motors have limited output power. We present models of certain problems that render descriptions that are closer to real situations encountered in practice.

Variation of the Equator due to a Highly Inclined and Eccentric Disturber

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Degradation of the surface of a metasilicate glass due to atmosphere moisture

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Induced polarization, resistivity, and self-potential: a case history of contamination evaluation due to landfill leakage

This article compares the efficiency of induced polarization (IP) and resistivity in characterizing a contamination plume due to landfill leakage in a typical tropical environment. The resistivity survey revealed denser electrical current flow that induced lower resistivity values due to the high ionic content. The increased ionic concentration diminished the distance of the ionic charges close to the membrane, causing a decrease in the IP phenomena. In addition, the self-potential (SP) method was used to characterize the preferential flow direction of the area. The SP method proved to be effective at determining the flow direction; it is also fast and economical. In this study, the resistivity results were better correlated with the presence of contamination (lower resistivity) than the IP (lower chargeability) data.