Theoretical study of the competition between folding and contact interactions on the properties of polymers using self-avoid random walk algorithm

The self-avoid random walk algorithm has been extensively used in the study of polymers. In this work we study the basic properties of the trajectories generated with this algorithm when two interactions are added to it: contact and folding interaction. These interactions represent the internal forces of the polymer as well as the effect of the solvent. When independently added to the algorithm, the contact interaction creates the compact phase while the folding one creates the extended phase. These are the consequences of the typical event of each interaction. On the other hand, when this typical event is avoided there is no established phase on the system. When simultaneously added, there is a competition between the interactions and the folding one is dominant over the contact one. The resulting phase is always the extended one with and without the contact interaction.Comment: 8 pages, 7 figure

A case report

Benign transient hyperphosphatasemia of infancy and early childhood is a self-limiting condition characte-rized by transiently increased serum alkaline phosphatase in the absence of liver, kidney or metabolic bone diseases. It is often accidentally found in children under five years old and it might be associated with a variety of underlying clinical disorders. Its pathophysiology remains unclear. Herein, we report a case of a 4-year-old girl with a 1-year history of persistent oligoarticular Juvenile Idiopathic Arthritis, who was found to have transient hyperphosphatasemia during a periodic check-up. This clinical case underlines the importance of promptly recognizing this benign condition, which avoids unnecessary extensive investigations.publishersversionpublishe

Frequency independent patterns from double shell lenses fed by leaky wave feeders

This work aims at designing a wideband leaky lens antenna capable of providing frequency independent patterns over a wide frequency band of operation, about one octave, using connected array of leaky slots as lens feeder in presence of a double shell lens. In addition to on-axis feeding, offset feeding is also studied in order to increase the scanning performance of the antenna system within the proposed frequency band of operation. Improvement in terms of pattern stability and scan loss have been demonstrated in the paper.info:eu-repo/semantics/publishedVersio

Criação de bovinos de corte no Estado do Pará.

Análise retrospectiva, situação atual e visão prospectiva. Alimentação e nutrição do rebanho. Manejo de plantas daninhas de áreas de pastagens cultivadas. Estratégias de recuperação de pastagens no Estado do Pará. Reprodução animal. Manejo reprodutivo de bonivos de corte. Melhoramento animal; Manejo sanitário. Instalações zootécnicas. Coeficientes técnicos, custos, rendimentos e rentabilidade. Mercado e comercialização. Cadeia produtiva da pecuária de corte no Estado do Pará.bitstream/item/125632/1/SIST-PROD-3-ON-LINE.pd

A non extensive approach for DNA breaking by ionizing radiation

Tsallis entropy and a maximum entropy principle allows to reproduce experimental data of DNA double strand breaking by electron and neutron radiation. Analytic results for the probability of finding a DNA segment of length l are obtained reproducing quite well the fragment distribution function experimentally obtained

Recomendação do tratamento químico de sementes de soja (Glycine max (L.) Merrill.

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A Hidden Complication of Pigtail Catheter Insertion

Pigtail catheters have emerged as an effective and less morbid alternative to traditional chest tubes for evacuation of pleural air. Rare complications in the literature have been reported. We report a case of a 92-year-old male who presented with dyspnea and shock, noted to have a pneumothorax requiring tube thoracostomy. Computed tomography demonstrated pigtail within the lung parenchyma. We discuss the implications of this occurrence