Atmosfera modificada na qualidade e metabolismo antioxidante de abacaxi ‘pérola’ minimamente processado

Abstract

This work was conducted with the objective assess the general quality of metabolism and antioxidant pineapple 'Pérola' treated with ascorbic acid and storage in modified atmosphere packaging.. Solution was used ascorbic acid (AA) 1% (m/v) to chemical treatment. We used 4 different types of atmosphere for packaging: atmosphere unchanged (control), modified atmosphere, active modified atmosphere with gas composed of 3% O2 + 10% CO2 + 87% N2 (low oxygen), with active modified atmosphere composition 100% O2 (high oxygen). The storage occurred in 5±1 ºC. The samples were collected without replacement every two days for a total of 10 days of storage for physicochemical analyzes. And collected every 5 days for microbiological analyzes. It was determined mass loss, evaluation of color (L*, chroma, ºhue, ΔE*), pH, soluble solids (SS), titratable acidity (TA), ratio, vitamin C, total phenolics, antioxidant activity by DPPH kidnapping, enzyme activity of arcorbato peroxidase, catalase enzyme activity, psychrotrophic bacteria count and yeast and mold counts. Treatment with AA increased the levels of vitamin C and phenolic compounds and antioxidant activity by DPPH method. The high oxygen induces the increase of antioxidant enzyme activity, while treatment with AA reduces the activity. The high oxygen reduced the proliferation of psychrotrophic 10 days of storage.