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Vacuum impregnation of chitosan‐based edible coating in minimally processed pumpkin
Author(s) -
Soares Ariana de Souza,
Ramos Afonso Mota,
Vieira Érica Nascif Rufino,
Vanzela Ellen Silva Lago,
Oliveira Patrícia Martins,
Paula Daniele de Almeida
Publication year - 2018
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.13811
Subject(s) - chitosan , coating , food science , materials science , chemistry , composite material , organic chemistry
Summary The goal of this research was to evaluate the use of vacuum impregnation ( VI ) and soaking techniques ( ST ) in the application of edible coatings of chitosan and chitosan + lauric acid to minimally processed pumpkins ( MPP ). The vacuum impregnation method led to greater component incorporation (5.9% and 1.75%, respectively) in the pumpkins when compared to soaking and consequently the formation of more uniform, thicker coatings (25.6 and 22.3 μm, respectively). However, VI caused greater changes in pH , acidity, colour and firmness. Relating to water content and carotenoid content, noncoated pumpkins presented greater losses during the storage period, regardless of impregnation method. The pumpkins with edible coatings, regardless of method, presented lower numbers of psychrotrophic micro‐organisms and coliforms during the storage period. Therefore, soaking was considered the best method for the application of chitosan‐based edible coatings to minimally processed pumpkins, as it led to smaller changes in the properties of the product.