Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/73184
Type: Artigo de periódico
Title: VARIABILITY OF FIG FIRMNESS INDEXES USING CYLINDRICAL PROBE AND PARALLEL PLATES COMPRESSION
Author: Souza, FC
Ferraz, ACD
Abstract: 'Roxo de Valinhos' fig is a perishable handling sensitive product. The low mechanical resistance of the mature fig fruit demands special care during harvesting, packing, transportation and commercialization. Firmness is an important textural attribute for vegetables, expressing the tension-strain measure useful to evaluating harvesting point and temporal quality. However, the non existence of a standard for measuring firmness may lead to inadequate decisions in choosing the proper index. In this work, four firmness indexes extracted from force-deformation curves as result of mechanical penetration tests with cylindrical probe and compression tests between flat and parallel plates were compared aiming to identify the index with least variability to be used in figs. Results indicated that previous force-deformation curves inspection is important to establishing firmness evaluation intervals. Among the considered firmness indexes, the deformation energy LIP to 10% deformation, using flat plate compression is the best index to evaluate fig firmness since it showed the lowest coefficient of variation.
Subject: Ficus carica L.
mechanical resistance
quality evaluation
texture
deformation energy
Country: Brasil
Editor: Soc Brasileira Fruticultura
Rights: aberto
Date Issue: 2009
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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