Galactic Nonlinear Dynamic Model

We develop a model for spiral galaxies based on a nonlinear realization of the Newtonian dynamics starting from the momentum and mass conservations in the phase space. The radial solution exhibits a rotation curve in qualitative accordance with the observational data.Comment: 6 pages, 1 figure. Talk given in the 7th Alexander Friedmann International Seminar, June 29 to July 5, 2008, Joao Pessoa, PB, Brazi

Giant congenital melanocytic nevi and neurocutaneous melanosis

Introduction. The major medical concern with giant congenital melanocytic nevi CMN is high risk of developing cutaneous melanoma, leptomeningeal melanoma, and neurocutaneous melanocytosis. Case Report. A 30-year-old woman with a giant congenital melanocytic nevus covering nearly the entire right thoracodorsal region and multiple disseminated melanocytic nevi presented with neurological symptoms. Cerebral magnetic resonance imaging revealed a large expansive lesion in the left frontal region. Postsurgically pathological diagnosis revealed characteristics of melanoma. Immunohistochemical examination showed S100(+), HMB45(+), MelanA(+), and MiTF(+). She received radiotherapy with temozolomide followed by two more chemotherapy cycles with temozolomide. She followed a rapidly progressive course, reflecting widespread leptomeningeal infiltration, and she died of multiorgan failure seven months after diagnosis of cerebral melanoma. Discussion. This patient was diagnosed as having a neurocutaneous melanosis with malignant widespread leptomeningeal infiltration. Diffuse spinal involvement is unusual and is described in only another patient

Leg ulcer as a manifestation of eosinophilic vasculitis in a patient with hepatitis C virus infection, medicated with pegylated interferon/ribavirin.

Cryoglobulinaemic vasculitis is a complication of hepatitis C virus (HCV) infection, responding to treatment with pegylated interferon (peg-IFN)/ribavirin (RIB), but vasculitis may first appear after treatment with peg-IFN/RIB. A 35-year-old man with HCV infection presented to our department with a 2-month history of a 3.3×3 cm ulcer localised on the right shin, with a regular border, on a violaceous base. Histopathological examination revealed a leucocytoclastic vasculitis, rich in eosinophils. The patient had been treated with peg-IFN/RIB 10 months prior and treatment was discontinued after 2 months because of the appearance of arthralgias and neuropathy. Laboratory investigations revealed positive cryoglobulins, elevation of rheumatoid factor and reduction of C4 after treatment with peg-IFN/RIB. Dressings with a hydrocellular foam were placed and after 2 months the ulcer resolved. We presented this case because of the rarity of development of a cryoglobulinaemic vasculitis in a patient with HCV infection, previously treated with peg-IFN/RIB

Seleção genômica ampla.

Introdução; Genética de associação; Seleção genômica ampla; Definição; Tipos de população; Validação cruzada; Fatores que afetam a seleção genômica ampla; Métodos estatísticos na seleção genômica ampla; RR-BLUP; Bayes A; Bayes B; LASSO Bayesiano; Estimação dos efeitos genéticos genômicos na população de seleção; Exemplos; Aplicação da seleção genômica ampla em diferentes organismos; Aplicações da seleção genômica no melhoramento animal; Aplicações da seleção genômica no melhoramento de plantas; Perspectivas; Referências

Schimmelpenning syndrome

Schimmelpenning syndrome (SS) includes an organoid nevus that follows the lines of Blaschko and defects of brain, eyes, bones, or other systems. We report a case of a 3-month old female infant, who presented with several thin plaques, with irregular borders, yellowish color, which had a verrucous appearance, following the lines of Blaschko, mainly occupying the left side of posterior trunk, the left face, the right side of the anterior trunk, and the right upper limb. These plaques had been present since birth. In addition, she had a flat salmon to yellow nevus on the left parietal and temporal region of the scalp, with a bald patch. She was diagnosed after birth with an interauricular communication. The skin biopsy from the lesion of the right arm revealed an epidermal nevus that occupied the epidermis completely. Routine and other complementary laboratory blood tests, including platelet count, thyroid function tests, 25-hydroxy-vitamin D, parathyroid hormone, and plasma and urinary levels of calcium and phosphorus were negative. Cerebral magnetic resonance and renal ultrasound were normal. The diagnosis of SS was established. She is being followed in the clinics of Dermatology, Cardiology, Pediatrics, and Pediatric Neurology. We report this case to point out the importance of investigating patients with epidermal nevus to identify associated conditions

A importância da calagem para a agropecuária.

bitstream/item/35596/1/Importancia-calagem.pd

Mineralogia da argila de latossolos estimada por alocação a partir do teor total de óxidos do ataque sulfúrico.

E apresentado um metodo de alocacao que estima a composicao mineralogica da argila de latossolos a partir dos teores de oxidos pelos metodos do ataque sulfurico e da difracao de raios X. Esse metodo e adequado para latossolos cuja fracao argila e constituida predominantemente decaulinita, gibbsita, hematita e goethita

Comparison between full and fast simulations in top physics

All analyses performed in the top quark sector with a full simulation of the ATLAS detector show a good agreement with fast simulation results. The purpose of this note is to understand why detailed detector effects are not so crucial in these studies. A systematic comparison, based on a ``Rome'' Data Challenge fully simulated data sample and an ATLFAST simulated one, is done on all top event objects, electrons, muons, neutrinos, light and b-jets. A very good agreement on reconstructed top kinematics variables is shown. This assess the robustness of the results obtained with fast simulations in the top quark sector, and more particularly the detailed estimates of the related systematic uncertainties, which are the key points of most of these analyses

Relation between phosphorus adsorption and clay mineralogical components of latosols of the Central Plateau of Brazil.

Com o objetivo de verificar o comportamento adsortivo de fosforo dos componentes mineralogicos da fracao argila, foram coletados amostras superficiais de oito solos, com textura e mineralogia variaveis. A goethita foi o principal componente dessa fracao responsavel pelas variacoes observadas na capacidade tampao maxima e na adsorcao maxima de fosforo