Pulsed-field magnetization of drilled bulk high-temperature superconductors: flux front propagation in the volume and on the surface

We present a method for characterizing the propagation of the magnetic flux in an artificially drilled bulk high-temperature superconductor (HTS) during a pulsed-field magnetization. As the magnetic pulse penetrates the cylindrical sample, the magnetic flux density is measured simultaneously in 16 holes by means of microcoils that are placed across the median plane, i.e. at an equal distance from the top and bottom surfaces, and close to the surface of the sample. We discuss the time evolution of the magnetic flux density in the holes during a pulse and measure the time taken by the external magnetic flux to reach each hole. Our data show that the flux front moves faster in the median plane than on the surface when penetrating the sample edge; it then proceeds faster along the surface than in the bulk as it penetrates the sample further. Once the pulse is over, the trapped flux density inside the central hole is found to be about twice as large in the median plane than on the surface. This ratio is confirmed by modelling

Doping with a special carbohydrate, C9H11NO, to improve the Jc-B properties of MgB2 tapes

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Conditional disruption of synaptic transmission induces male–male courtship behavior in Drosophila

It is reported here that male–male courtship behavior is evoked instantaneously in the fruit fly Drosophila by conditional disruption of synaptic transmission. A temperature-sensitive allele of the Drosophila dynamin gene shibire (shi(ts1)) was expressed by using the GAL4/UAS system to disrupt synaptic transmission from GAL4-positive neurons in a temperature-dependent manner. An enhancer-trap GAL4 line C309 directing shi(ts1) expression in central and peripheral neurons (C309/UAS-shi(ts1)) initiated stereotypical precopulatory behavior toward other mature males immediately after a temperature shift from the permissive to restrictive temperature. At the restrictive temperature, C309/UAS-shi(ts1) males formed “courtship chains” and exhibited abnormally high levels of head-to-head interactions. The temperature-induced male–male courtship is attributable not to an increase in sexual attractiveness but to an increase in sexual activity of C309/UAS-shi(ts1) males. Interestingly, the temperature-induced increase in sexual activity is specific toward male partners, because C309/UAS-shi(ts1) males courted receptive virgin females less vigorously and copulated less efficiently after shifted to the restrictive temperature. Among the GAL4-positive neurons in C309, conditional disruption of certain cholinergic neurons but not the mushroom body intrinsic neurons plays a critical role in the induction of male–male courtship. These neurons may be involved in inhibitory systems that normally suppress aberrant male–male courtship. The presented strategy that can induce behavioral abnormalities by disrupting synaptic transmission in an acute and noninvasive manner will allow further exploration as to how distinct neuronal groups control sexual orientation and other aspects of reproductive behavior in Drosophila

Perfil da assistência farmacêutica na atenção primária do Sistema Único de Saúde Pharmacist care in the Brazilian Primary Health Care System

Este artigo apresenta uma revisão e análise da assistência farmacêutica como parte integrante do sistema de atenção primária à saúde, no qual a qualidade do uso de medicamentos está diretamente relacionada à qualidade do serviço de saúde e aos elementos para a avaliação desta. As Unidades Básicas de Saúde constituem a principal porta de entrada do sistema de assistência à saúde estatal em nosso país. Entretanto, o vínculo do serviço farmacêutico está relacionado com o modelo curativo, centrado na consulta médica e pronto atendimento, com a farmácia apenas atendendo a essas demandas. A atividade de orientação aos usuários na farmácia das Unidades Básicas de Saúde torna-se praticamente impossível, pois na farmácia deságuam quase todas as mazelas do sistema de saúde, por estar no elo final do processo de atendimento. A solução do problema, no âmbito geral, não será simples, se mantida a forma como o serviço está estruturado, pois grande parte das pressões de demanda não depende do serviço de saúde em si, mas de políticas sociais inclusivas, as quais têm impacto direto nas condições de saúde da população. No âmbito específico, é fundamental que os gestores racionalizem a utilização dos medicamentos desde a prescrição até a utilização por parte do usuário.<br>This paper presents a review and analysis of Pharmacist Care as an integrated part of the Primary Health Care System, in which quality use of medicines is directly related to quality health service and to elements for its evaluation. In our country the Basic Health Units represent the main entrance to the public health care system. The pharmaceutical services however are still linked to the care model centered in medical consultation and emergency care, with the pharmacy just satisfying their needs. Provide orientation to the users of a Basic Unit pharmacy is almost impossible because nearly all sore spots of the health system end up at the pharmacy as the final step in the care process. The solution of the problem will not be easy if the present structure of the service is maintained. Great part of the pressure resulting from the demand does not depend on the health service itself but on inclusive social policies with direct impact on the health conditions of the population. Rational use of medicines from the prescriber to the user is fundamental in this specific environment