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Compréhension des mécanismes de Biominéralisation de l'otolithe : quantification spatialisée des fractions minérale et organique et influence des facteurs environnementaux ArchiMer
Jolivet, Aurelie.
Despite numerous applications on the use of otoliths at both population and individual levels, knowledge regarding the mechanisms of the otolith and their variations with environmental and physiological factors has to be improved. In particular, the characterization of mineral and organic fractions of the otolith structures and the influence of their qualitative and quantitative composition on the opacity remain poorly documented. Yet this information is of key interest for the calibration of the archive "otolith" allowing a robust analysis of information. The first issue of this study focused on the analysis of the opacity and the effects of temperature, growth and metabolism through experiments in controlled conditions. Results led to the modelling of...
Tipo: Text Palavras-chave: Merluccius merluccius; Otolithe; Microstructures; Macrostructures; Opacité; Spectrométrie RAMAN; Merluccius merluccius; Otolith; Microstructures; Macrostructures; Opacity; RAMAN Spectrométry.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00035/14649/11937.pdf
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Influence of thickness on properties of plasticized oat starch films BABT
Galdeano,Melicia Cintia; Wilhelm,Allan Eduardo; Mali,Suzana; Grossmann,Maria Victória Eiras.
The aim of this study was to investigate the effect of thickness (between 80 and 120 µm) on apparent opacity, water vapor permeability and mechanical properties (tensile and puncture) of oat starch films plasticized with glycerol, sorbitol, glycerol:sorbitol mixture, urea and sucrose. Films were stored under 11, 57, 76 and 90% relative humidity (RH) to study the mechanical properties. It was observed that the higher the thickness, the higher was the opacity values. Films without the plasticizer were more opaque in comparison with the plasticized ones. Glycerol:sorbitol films presented increased elongation with increasing thickness at all RH. Puncture force showed a strong dependence on the film thickness, except for the films plasticized with sucrose. In...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plasticizers; Tensile; Puncture; Permeability; Opacity; Glycerol.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400014
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Performance of a diesel engine fueled with a preheated blend of soybean oil and petrodiesel REA
Delalibera,Hevandro C.; Campolina,Nilson; Weirich Neto,Pedro H.; Ralisch,Ricardo.
Brazil is doing a major effort to find alternatives to diesel oil as combustible. Some study lines are oriented to the development of vegetable oils used as fuel, as a source of getting cheaper and have higher energy density than the converted vegetable oils, and less risk of environmental contamination. The aim of this study was to evaluate the performance, the useful life of the lubricant and some components of a Diesel Cycle engine, with an electronic injection system, in a long-term test operating with a preheated blend (65°C) of 50% (v v-1) of soybean oil in petrodiesel. There was a reduction of the useful life of the injectors which presented failure because of high wear with 264 hours of operation and showed an increase in emissions of particulate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electronic injection; Opacity; Lubricant.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600007
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PERFORMANCE OF DIESEL ENGINE FUELLED WITH FOUR VEGETABLE OILS, PREHEATED AND AT ENGINE WORKING TEMPERATURE REA
Delalibera,Hevandro C.; Johann,André L.; Figueiredo,Paulo R. A. de; Toledo,Anderson de; Weirich Neto,Pedro H.; Ralisch,Ricardo.
ABSTRACT With the rise of restrictions imposed by law for gases emission, several technologies both for petrodiesel (PD) or diesel engines are been applied, such as the sulfur reduction and the injection electronic command, followed of gases recirculation and/or after-treatment. The utilization of biofuels is considered as an interesting option for pollutants reduction. In this study was evaluated the performance on short duration tests (minor period than the factory indication of the lubricant lifespan) of the Diesel engine fueled with four vegetable oils. With the aim to select the most interesting oils for future evaluations in long duration tests. The analyzed variables were fuel consumption, power relative loss and opacity, for oils of linseed,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Consumption; Brake power; Opacity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200302
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