Objetivou-se, com o presente trabalho, avaliar a qualidade de cerejas cv. Ambrunés ("picotas"), cobertas com películas comestíveis à base de zeína e cera de carnaúba, aplicadas na forma de imersão e pulverização, e armazenadas em ambiente controlado a 5 ºC ± 0,5 ºC e umidade relativa de 90 - 95 %. Os parâmetros usados para avaliar a qualidade dos frutos foram: sólidos solúveis totais (SST), acidez total titulável (ATT), perda de peso, relação SST/ATT e deterioração fúngica. Os frutos foram avaliados até o 52º dia de conservação. A emulsão de cera de carnaúba mostrou-se superior em todos os parâmetros, quando comparados com os frutos-testemunha e os cobertos com zeína. A cobertura à base de zeína provocou a aceleração da maturação dos frutos e apresentou deterioração fúngica a partir do 24º dia de armazenamento. Foi observado que a forma de comercialização das cerejas sem o pedúnculo ("picotas") representa maior possibilidade de contaminação fúngica através da área lesionada. A emulsão de cera de carnaúba aplicada na forma de imersão retardou a podridão até o 45º dia de conservação, apresentando-se como o melhor tratamento.

O objetivo deste trabalho foi avaliar as propriedades mecânicas de cerejas (testes de simulação de impactos, punção e compressão da epiderme), usando zeína e emulsão de cera de carnaúba como coberturas comestíveis. Em todos os ensaios executados, os frutos tratados a base de cera de carnaúba (CERAI e CERAP) apresentaram os melhores resultados de resistência mecânica. Os frutos submetidos à cobertura ZEÍNA 500 não evidenciaram ganho de resistência e tiveram seu metabolismo de maturação acelerado, quando comparados com os outros tratamentos. Conclui-se que os frutos tratados com a emulsão de cera de carnaúba, aplicada na forma de imersão, adquiriram maior resistência (firmeza e simulação de impactos) para enfrentar as etapas de beneficiamento e transporte. MECHANICAL PROPERTIES OF CHERRIES (Prunus avium L.), CV. AMBRUNÉS, COVERED WITH CARNAÚBA WAX AND ZEINA EMULSIONS Abstract The objective of this work was to evaluate the cherries mechanical properties (the simulation of impacts, puncture and epidermis compression) by using zeína and an emulsion of carnaúba wax as edible coatings. In all of the attempts performed, the fruits treated with carnaúba wax (CERAI & CERAP) presented the best results of mechanical resistance. These fruits submitted to ZEÍNA 500 coating didn’t evidence resistance gain and the ripening metabolism was accelerated, when compared to the other treatments. It was concluded that the fruits treated with the emulsion of carnaúba wax, applied in the immersion form, acquired a bigger resistance to face the phases of manufacture and transportation.

3D_Mec is a GPL-ed application for the solution of problems related to Mechanics. It is specially well suited for the direct kinematic and dynamic simulation of general systems. Is has been used during the last 10 years as a practical complement of the “Mechanics” Bachelor Course in Mechanical Engineering at the Public University of Nabarre-Spain. The main focus of the application is teaching Classical Mechanical principles and their applications. To that end 3D_Mec is constructed over an underlying Symbolic Algebra Kernel that allows the user to express itself in a language that closely resembles that of the mechanics and its level of abstraction. Classical kinematical primitives: Point, Basis and Reference, and set of operators acting upon them; support for vector and tensors, automatic basis change, ... relieve the user from the tedious algebraic manipulations directing his focus at the concept. A set of OpenGL based graphical primitives allow to represent the system and its simulation, and to create clips from them, it also represents a valuable way to check for the validity of the defined vectors and equations. 3D_Mec can also be used as a preprocessor or postprocessor, this is accomplished exporting the defined variables and different sets of equations in the popular language MatLab [3], where the integration or a different problem can be readily made based on well formed tested equations, results can be easily imported back from files containing a temporal series of the different variables. The program is also being used successfully in this way in “Dynamics of MultiBody Systems” PhD. course.

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The properties of a modified coaxial transmission line by periodic inclusions will be discussed. The introduction of split ring resonators, conductor stubs, air gaps, and combination of these gives rise to new frequency selective properties, such as stopband or passband behavior, observable in planar as well as volumetric metamaterial structures. These results envisage new potential applications and implementation of devices in coaxial transmission line technology.