کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5132561 | 1492049 | 2018 | 10 صفحه PDF | دانلود رایگان |
- High pressure at 700â¯MPa caused colour change in purple kernel similar to steaming.
- Pressurized kernels had higher antioxidant activities than steamed kernels.
- High pressure resulted in the loss of anthocyanin in the purple kernels.
- Higher pressures, in range of 250-550â¯MPa, decreased the phytochemical contents.
- At 700â¯MPa, the anthocyanin content in the kernels was higher than that at 550â¯MPa.
High-pressure processing (HPP) at 250-700â¯MPa for 30-45â¯min affects the colour parameters, phytochemical contents and antioxidant activities of purple waxy corn kernels (pâ¯<â¯0.05). The higher pressure-level, the lower Lâ, aâ, bâ, Câ and ho (pâ¯<â¯0.05). However, pressure-treated kernels at 700â¯MPa showed a similar colour profile to steam-treated kernels. HPP caused a loss in the total phenolic, flavonoid, and anthocyanin contents and antioxidant activities. The pressure-treated kernels had a higher phytochemical content than the steam-treated kernels. The phytochemicals and antioxidant activities decreased as the pressure increased from 250 to 550â¯MPa, but the levels recovered at 700â¯MPa. The longer holding-time, the greater loss of the compounds and antioxidant activities (pâ¯<â¯0.05). Pressure treatment at 700â¯MPa yielded the highest total phenolic and anthocyanin contents (pâ¯<â¯0.05). Water-soluble compounds can leach from food materials due to cell rupture. Nevertheless, HPP is a potential process to preserve the phytochemicals in food.
Journal: Food Chemistry - Volume 243, 15 March 2018, Pages 328-337