1,445 research outputs found

    The rise of the Chinrest and shoulder rest : their influence on violin performance practice

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    In recent decades there has been a growing interest in the performance practice of the 19th-century repertoire for violin, both in academia and within the HIP movement (Historically Informed Performance Practice). Recent research lacks a demonstrable link between playing positions and the specific techniques regarding the use of the left hand in nineteenth-century violin playing. This is, however, an integral consideration for this topic. Only through practice based research can the link between the intrinsic raison d’ĂȘtre of the postures that are reported in the historical documentation be tested for their effect on playing methods and on their interpretative and rhetorical consequences. Historical documentation is not consistently applied in current practice. While some violinists stubbornly use a chin-off position with repertoire from the early 19th century, others use the chin rest for the same repertoire (perhaps out of convenience). Practice based research is, therefore, a necessary step to arrive at informed conclusions about how nineteenth-century violinists played, as well as what this contributes to the interpretation and execution of works historically associated with specific violinists or violin schools

    Ictiofauna de uma planície de maré adjacente a Gamboa do Baguaçu, Baia de Paranaguå,PR

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    Orientadores: Henry Louis Spach, Marco FĂĄbio M. CorreaMonografia (Bacharelado) - Universidade Federal do ParanĂĄ. Setor de Ciencias BiolĂłgicas. Curso de Graduaçao em Ciencias BiolĂłgicasResumo: As amostras foram obtidas mensalmente na baixa-mar de quadratura em uma planĂ­cie de marĂ©, utilizando-se para tal uma rede tipo picarĂ© de 30,0 x 3,0 m e 1 mm de malhagem 65,0 x 2,Om e 10 mm de malhagem. Simultaneamente aos arrastos, foram obtidos dados de salinidade, temperatura e de pH da ĂĄgua de superfĂ­cie. Foram capturados 8.890 exemplares, pesando 53.326 g, pertencentes a 53 espĂ©cies e 24 famĂ­lias. Duas espĂ©cies Harengula clupeola e Atherinella brasiliensis constituĂ­ram 63,40% e 62,98% da captura em nĂșmero e peso respectivamente. A comunidade local amostrada, esteve constituĂ­da por 49,65% de juvenis e 50,26% de adultos. O comprimento padrĂŁo mĂ©dio dos peixes foi de 73,31 mm, indicando o predomĂ­nio de espĂ©cies de pequeno porte, com mĂ©dias mensais menores em fevereiro, março e maio e maiores na primavera. Observou-se um padrĂŁo sazonal na abundĂąncia, com as menores ocorrĂȘncias numĂ©ricas no inverno e em parte da primavera. Uma menor quantidade de espĂ©cies foi coletada em junho, julho, agosto e setembro, sendo consideravelmente maior em janeiro, fevereiro e março. A sazonal idade tambĂ©m foi evidente na riqueza de espĂ©cies, com menores valores entre junho e setembro e maiores valores entre janeiro e março. As flutuaçÔes na diversidade em espĂ©cies e equitabiliade tambĂ©m apresentaram uma tendĂȘncia sazonal. A anĂĄlise de Cluster revelou 4 grupos de amostra, com considerĂĄvel similaridade com respeito ao nĂșmero de exemplares, nĂșmero de espĂ©cies, diversidade e riqueza de espĂ©cies. JĂĄ a anĂĄlise de similaridade entre os padrĂ”es de abundĂąncia das espĂ©cies mostrou 4 grupos de espĂ©cies, definidos por caracterĂ­sticas ecolĂłgicas das mesmas. A atividade reprodutiva Ă© maior na primavera e verĂŁo, menor no inverno e reduzida no outono. Em termos relativos, ocorre um aumento no recrutamento a partir de fevereiro, com os maiores valores percentuais em março, abril e maio

    Avaliaçăo do efeito do metilmercĂșrio (CH3Hg+) em Hoplias malabaricus atravĂ©s da frequęncia de aberraçƑes cromossĂŽmicas e dos ensaios cometa e micronĂșcleo /

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    Orientadora : Marta Margarete CestariCo-orientador : Alberto SĂ©rgio FenocchioDissertaçăo (mestrado) - Universidade Federal do ParanĂĄ, Setor de Cięncias BiolĂłgicas, Programa de PĂłs-Graduaçăo em GenĂ©tica. Defesa: Curitiba, 2004Inclui bibliografi

    Glucagon-Like Peptide-1 Agonists Protect Pancreatic ÎČ-Cells From Lipotoxic Endoplasmic Reticulum Stress Through Upregulation of BiP and JunB

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    Chronic exposure of pancreatic beta-cells to saturated free fatty acids (FFAs) causes endoplasmic reticulum (ER) stress and apoptosis and may contribute to beta-cell loss in type 2 diabetes. Here, we evaluated the molecular mechanisms involved in the protection of beta-cells from lipotoxic ER stress by glucagon-like peptide (GLP)-1 agonists utilized in the treatment of type 2 diabetes.info:eu-repo/semantics/publishe

    Cellular, molecular and functional characterisation of YAC transgenic mouse models of Friedreich Ataxia

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    Copyright © 2014 Anjomani Virmouni et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.This article has been made available through the Brunel Open Access Publishing Fund.Background - Friedreich ataxia (FRDA) is an autosomal recessive neurodegenerative disorder, caused by a GAA repeat expansion mutation within intron 1 of the FXN gene. We have previously established and performed preliminary characterisation of several human FXN yeast artificial chromosome (YAC) transgenic FRDA mouse models containing GAA repeat expansions, Y47R (9 GAA repeats), YG8R (90 and 190 GAA repeats) and YG22R (190 GAA repeats). Methodology/Principal Findings - We now report extended cellular, molecular and functional characterisation of these FXN YAC transgenic mouse models. FXN transgene copy number analysis of the FRDA mice demonstrated that the YG22R and Y47R lines each have a single copy of the FXN transgene while the YG8R line has two copies. Single integration sites of all transgenes were confirmed by fluorescence in situ hybridisation (FISH) analysis of metaphase and interphase chromosomes. We identified significant functional deficits, together with a degree of glucose intolerance and insulin hypersensitivity, in YG8R and YG22R FRDA mice compared to Y47R and wild-type control mice. We also confirmed increased somatic GAA repeat instability in the cerebellum and brain of YG22R and YG8R mice, together with significantly reduced levels of FXN mRNA and protein in the brain and liver of YG8R and YG22R compared to Y47R. Conclusions/Significance - Together these studies provide a detailed characterisation of our GAA repeat expansion-based YAC transgenic FRDA mouse models that will help investigations of FRDA disease mechanisms and therapy.European Union, Ataxia UK and FARA
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