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The effect of dynamic high-pressure microfluidization (DHPM) treatment on vitamin C, the total polyphenol content and the antioxidant activity of fresh pineapple juice was studied. Results indicated that the vitamin C content decreased after DHPM treatment. Under the pressure of 30 MPa, the loss of vitamin C was most. The total polyphenol content in fresh pineapple juice showed different degree of reduction after DHPM treatment. Under the pressure of 60 MPa, the total polyphenol content was the lowest, which was about 383.19 mg/L. The antioxidant capacity of pineapple juice decreased after the different DHPM pressure treatment compared to the untreated one by phosphomolybdenum method and ferric reducing/antioxidant power assay.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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