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Polyphenol oxidase activity and colour changes of ‘Starking’ Apple cubes coated...
Fernandes, Susana Daniela Sousa; Ribeiro, Catarina Araújo da Silva; Raposo, M. F.; Morais, R. M. S. C.; Morais, Alcina Maria Miranda Bernardo deThe objective was to study the effect of alginate coating on polyphenol oxidase (PPO) activity and colour of ‘Starking’ apple cubes during dehydration with hot air. Apple cubes were dehydrated at 20°C, 35°C or 40°C, with a parallel air-flow. Analysis of PPO activity, colour (L*, a*, b*) and dry matter were performed along the dehydration process at each temperature. All samples presented a peak in relative PPO ...
Vácuo para prolongar vida útil de cenoura de IV gama
Morais, Alcina Maria Miranda Bernardo de
Effects of controlled atmosphere on quality of minimally processed apple (cv. j...
Rocha, Ada Margarida Correia Nunes; Morais, Alcina Maria Miranda Bernardo deControlled atmosphere (2% O2+ 4% to 12% CO2) storage was found to be advantageous over air storage in terms of overall preservation of fresh-cut apple (cv. Jonagored). After 3 days, CA-stored apple cubes were firmer, showed better color and higher content of fructose and soluble solids content than air-stored cubes. In relation to color preservation this benefit was increased when CO2 in the atmosphere was incr...
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