Articles
Effect of wheat gluten-based edible coating and irradiation on quality of fresh-cut pineapple
Article number
1111_31
Pages
212 – 220
Language
English
Abstract
The aim of this research was to study the effect of calcium chloride (CaCl2), wheat gluten-based edible coating and irradiation on the quality of ‘Perola’ fresh-cut pineapple.
Slices of pineapple were treated and packed in rigid polyethylene terephthalate (PET) trays.
The packages were irradiated with 2.3 kGy h-1 and the samples were stored at 5 ± 1°C. Analyses were carried out every two days for 12 days.
The CaCl2 + 2.3 kGy treatment had the lowest activity of polyphenoloxidase (PPO: 19.3 U g-1 min-1) and peroxidase (PDO: 36.6 U g-1 min-1). The highest respiratory activity and ethylene production was observed for samples treated with CaCl2 + gluten + 2.3 kGy.
Browning occurred for all treatments over the storage period of 12 days, with CaCl2 + gluten + 2.3 kGy showing the darkest colour (lightness: 59.7, chroma: 14.4, hue angle: 98.2). However, these same samples showed the lowest psychrotrophic (3.59 log CFU g-1 NDASH Colony Forming Units per gram), mesophiles (4.32 log CFU g-1), and molds and yeasts (4.04 log CFU g-1) counts. Salmonella and total and fecal coliforms were not found in this experiment for any treatment.
CaCl2 + 2.3 kGy and CaCl2 + gluten + 2.3 kGy treatments were effective in maintaining the physicochemical and microbiological quality, respectively.
Slices of pineapple were treated and packed in rigid polyethylene terephthalate (PET) trays.
The packages were irradiated with 2.3 kGy h-1 and the samples were stored at 5 ± 1°C. Analyses were carried out every two days for 12 days.
The CaCl2 + 2.3 kGy treatment had the lowest activity of polyphenoloxidase (PPO: 19.3 U g-1 min-1) and peroxidase (PDO: 36.6 U g-1 min-1). The highest respiratory activity and ethylene production was observed for samples treated with CaCl2 + gluten + 2.3 kGy.
Browning occurred for all treatments over the storage period of 12 days, with CaCl2 + gluten + 2.3 kGy showing the darkest colour (lightness: 59.7, chroma: 14.4, hue angle: 98.2). However, these same samples showed the lowest psychrotrophic (3.59 log CFU g-1 NDASH Colony Forming Units per gram), mesophiles (4.32 log CFU g-1), and molds and yeasts (4.04 log CFU g-1) counts. Salmonella and total and fecal coliforms were not found in this experiment for any treatment.
CaCl2 + 2.3 kGy and CaCl2 + gluten + 2.3 kGy treatments were effective in maintaining the physicochemical and microbiological quality, respectively.
Authors
L. Pilon, M.C. Tetelboim, C.R. Gallo, S.B.S. Sarmento, M.H.F. Spoto
Keywords
color, microorganisms, enzymes, CO2, ethylene
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