Influence of the type of packaging on textural properties of minimally processed yellow Peruvian roots

ABSTRACT The textural properties of minimally processed products indicate its quality, and the package is fundamental to maintain the conservation of these foods. The aim of this study was to evaluate texture alterations that occur during the storage period of minimally processed yellow Peruvian roo...

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Published in:Revista Ceres Vol. 63; no. 3; pp. 291 - 296
Main Authors: Fernandes, Lara Santana, Corrêa, Paulo Cesar, Junqueira, Mateus da Silva, Finger, Fernando Luiz, Cecon, Paulo Roberto
Format: Journal Article
Language:English
Published: Universidade Federal de Viçosa 01-06-2016
Universidade Federal De Viçosa
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Summary:ABSTRACT The textural properties of minimally processed products indicate its quality, and the package is fundamental to maintain the conservation of these foods. The aim of this study was to evaluate texture alterations that occur during the storage period of minimally processed yellow Peruvian roots, using texture profile analysis (TPA) and relaxation, in function of four types of plastic packaging, combined to refrigeration. The roots were selected, sanitized, peeled and sliced. The processing continued with final sanitization, rinsing and immersion in ascorbic and citric acid solution. The slices were centrifuged and packed in expanded polystyrene trays covered with PVC film, and in high-density polyethylene bags (HDPE), polypropylene bags (PP) and multilayer polyolefin bags for vacuum, and stored at 5 ± 2 ºC and 90 ± 5% relative humidity during 12 days. For the TPA, the parameters of interest were hardness and adhesiveness, automatically calculated from the force curves (F) x time (s). For modeling the relaxation process, the generalized Maxwell model was used. The slices packed in PP and vacuum showed higher hardness and normalized force in the balance (0.7502 and 0.7580, respectively), indicating that they were more elastic, better preserving the quality during storage than slices packed in other packaging. RESUMO As propriedades texturais dos produtos minimamente processados indicam a sua qualidade, sendo a embalagem fundamental para manter a conservação destes alimentos. Objetivou-se com este trabalho avaliar as alterações de textura que ocorrem durante o armazenamento das batatas baroa minimamente processadas através da análise do perfil de textura (TPA) e relaxação, em função de 4 tipos de embalagens plásticas, combinadas à refrigeração. As batatas baroa foram selecionadas, lavadas, sanitizadas, descascadas e cortadas em rodelas. O processamento prosseguiu com sanitização final, enxágue e imersão em solução de ácido ascórbico e ácido cítrico. As rodelas foram centrifugadas e acondicionadas em bandejas de poliestireno expandido revestidas com filme de PVC e em sacos de polietileno de alta densidade (PEAD), de polipropileno (PP) e de poliolefina multicamadas para vácuo e foram mantidas a 5 ± 2 ºC e 90 ± 5% de umidade relativa, durante 12 dias. Para o TPA, os parâmetros de interesse foram dureza e adesividade, calculados a partir das curvas de força (N) x tempo (s). Para a modelagem da relaxação utilizou-se o modelo generalizado de Maxwell. As rodelas acondicionadas nas embalagens de PP e à vácuo apresentaram valor mais elevado de dureza e maior força normalizada no equilíbrio (0,7502 e 0,7580, respectivamente) indicando que foram mais elásticas, preservando melhor a qualidade durante o armazenamento que as rodelas acondicionadas nas demais embalagens.
ISSN:0034-737X
2177-3491
0034-737X
DOI:10.1590/0034-737X201663030003