文章基本信息

标题：Blanching Effect on the Quality and Shelf-Life Characteristics of Fresh Cowpea Grains [ Vigna unguiculata (L.) Walp.]
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作者：Romayana Medeiros de Oliveira Tavares ; Cristiane Fernandes de Assis ; Patrícia de Oliveira Lima 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2022
卷号：11
期号：9
DOI：10.3390/foods11091295
语种：English
出版社：MDPI Publishing
摘要：The high perishability of fresh cowpeas impairs its commercialization. Thus, this study aims to determine the temperature–time binomial for blanching fresh cowpea [ Vigna unguiculata (L.) Walp] by evaluating the effects of heat treatment and kinetic behavior on the peroxidase (POD) activity and on the physical characteristics (firmness, color, mass gain). A factorial design (3 × 6) with temperature (70, 80, and 90 °C) and time (1, 2, 4, 6, 8, and 10 min) was implemented. Physicochemical, microbiological, and enzymatic (POD) changes, in addition to photographic monitoring, were evaluated throughout the storage period (4.90 °C). With regard to the effects of the independent variables and the first-order kinetic model, it was determined that 70 °C for 4 min of blanching maintained and/or improved the physical characteristics of the raw material. The pH and the acidity of the blanched fresh cowpea changed little during the storage period; the microbiological load and POD activity reduced with blanching and remained stable until the eighth day of storage, and provided an increase of 5 days in shelf-life under refrigeration when compared to non-blanched. Blanching is shown as an alternative for improving fresh cowpeas, favoring an economic increase in production with guaranteed quality and safety attributes.
关键词：enheat treatmentquality controlenzymatic activitylegumeshelf life