251 research outputs found

    Classical myths in the Colombian poetess Meira Delmar

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    Análisis de tres poemas mitológicos en la obra de la colombiana Meira Delmar: "Dafne" y "Narciso" de Laúd memorioso, y "Orfeo" del posterior Alguien pasa. Los tres son lecturas poéticas siguiendo la formulación tradicional del mito plasmada sobre todo por Ovidio en diversos pasajes de las Metamorfosis, que contrastan con las diversas interpretaciones de poetas coetáneos de la autora.Analysis of three mythological poems in the work of the Colombian Meira Delmar: "Dafne" and "Narciso" from Laúd memorioso, and "Orfeo" from the later Alguien pasa. The three of them are poetic readings according to the traditional formulation of the myth mainly reflected above all in Ovidio in several passages from Las Metamorfosis, which contrast with the different interpretations of contemporary poets of the author

    Gap Junction Remodeling in the Failing Heart:

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    Entrepreneurial behavior and business performance [Elektronisk resurs]

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    How does the behavior of the entrepreneur affect the development and performance of the business venture? Why do some small business owner-managers remain small, when others wish to grow? In this dissertation the author tries to answer these questions by examining the importance of stable psychological characteristics of the entrepreneur on business performance and expected future performance. The author argues that the entrepreneurship research focus on the entrepreneurial personality is far too narrow, ignoring a crucial range of psychological factors such as intellectual ability and motivation that matter immensely in terms of how entrepreneurs act. Drawing on modern psychological and entrepreneurship research, the author shows how emotions, attitudes, values, IQ, and attribution affect the entrepreneurs’ behavior and subsequently the performance of the business. The author’s own research is presented and commented upon in six different research papers and in a comprehensive introduction chapter

    \"Differential proteomic analysis of the citrus sudden death disease\"

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    Este projeto teve como objetivo principal realizar um estudo proteômico diferencial aplicado às amostras de casca do caule de plantas cítricas sadias e infectadas pela morte súbita dos citros. Subsequentemente, a identificação de proteínas diferentemente expressas será de grande importância, uma vez que estas poderão servir não somente como candidatos a biomarcadores para a doenças, mas também auxiliarão no melhor compreensão da doença. À partir dos géis bidimensionais obtidos para amostras de porta-enxerto (limão cravo e limão volkameriano) e copa (laranja valência) foi possível verificar que existem dois conjuntos de proteínas sensivelmente sub-expressas em plantas doentes. Um desses conjuntos, constituído por 13 spots, apresenta valores de pI entre 4,5 e 5,2 e MM aproximadamente igual a 30 kDa. No outro conjunto, esse composto por 9 spots, valores de pI variando entre 6,1 e 9,6 e MM em torno de 20 kDa são observados. Por meio das técnicas de MALDI-TOF-TOF e LC-ESI-MS/MS, inúmeros spots foram inequivocamente identificados, incluindo os spots correspondentes às regiões diferentemente expressas. Os 13 spots correspondentes a região com valores de pI entre 4,5 e 5,2 e MM ~ 30 kDa foram todos identificados como sendo constituídos por três isoformas de quitinases. Por outro lado, os spots referentes a região com pI entre 6,1 e 9,6 e MM ~ 20 kDa foram identificados como proteína putativa similar a miraculina 2. A justificativa para o fato de diversos spots terem recebido a mesma identificação é atribuída às inúmeras e diferentes modificações pós-traducionais, comumente verificadas em plantas. Entretando, o aspecto mais relevante relacionado a essas identificações é o fato de que ambas as proteínas são conhecidas marcadoras de resistência de defesa em plantas e assim sendo, a priori, espera-se-ia que estivessem sendo super expressas em plantas doentes. Porém, um comportamento inverso foi verificado, o que reforça as evidências de que as quitinases não agem apenas como marcadores de defesa em plantas, possuindo assim outras funções. Além disso, no total, outras 19 proteínas puderam ser identificadas.The main goal of this project was to perform a differential proteomic analysis of bark tissues of healthy and CSD (citrus sudden death)- affected citrus plants. Subsequently, the identification of differently expressed proteins will be of great importance since they can be used not only as biomarkers for CSD but also as basic information for improving the knowledge about the disease. According to the 2D gels, obtained for bark tissues of both rootstock (rangpur lime and volkamerian lemon) and scion samples, there are two sets of proteins remarkably under expressed in CSD-affected samples. One of these sets is composed by 13 proteins, which presents MW around 30 kDa and pI ranging from 4.5 to 5.2. The other set includes 9 proteins with pI ranging from 6.1 to 9.6 and MW around 20 kDa. By using two mass spectrometry approaches (MALDI-TOF-TOF and LC-ESI-MS/MS), several proteins have been unequivocally identified, including the differentially expressed ones. Thirteen spots have been identified as a mixture of three chitinase isoforms. These spots are relative to the region with pI ranging from 4.5 to 5.2 and MW ~ 30 kDa. On the other hand, the 9 spots referent to the region with MW ~ 20 kDa and pI between 6.1 and 9.6 were identified as putative miraculin-like 2 protein. Several spots have been identified as the same protein most probably due to the occurrence of different post-translational modifications. The most valuable point regarding the identity of these proteins is the fact that they are well-known plant pathogen-related proteins and then they should be over expressed in affected plants. However, the opposite behavior was verified, which may indicate that chitinases and putative miraculin-like 2 protein perform unknown functions, besides the established ones. In addition, other 19 constitutive proteins have been identified

    Ionic Basis of the Wenckebach Phenomenon

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