บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of postharvest ultraviolet irradiation on resveratrol and other phenolics of cv. Napoleon table grapes.

Cantos, E.; Garcia-Viguera, C.; Pascual-Teresa, S. de; Tomas-Barberan, F. A.;

Journal of Agricultural and Food Chemistry Year: 2000 Vol: 48 Issue: 10 Pages: 4606-4612 Ref: 22 ref.

2000

บทคัดย่อ

Effect of postharvest ultraviolet irradiation on resveratrol and other phenolics of cv. Napoleon table grapes.

In the skin of cv. Napoleon table grapes, the anthocyanins malvidin 3-glucoside (and its acetyl and p-coumaroyl derivatives), cyanidin 3-glucoside, peonidin 3-glucoside, cyanidin 3-glucoside, petunidin 3-glucoside, and delphinidin 3-glucoside were identified by HPLC-DAD-MS. In addition, quercetin 3-glucoside and 3-glucuronide, caffeoyltartaric, piceid, and resveratrol were also detected. The content of most phenolics remained quite constant during postharvest refrigerated storage (10 days at 0 deg C) while the resveratrol derivatives increased 2-fold. Postharvest treatments of grapes with UVC and UVB light induced a large increase in resveratrol derivatives (3- and 2-fold, respectively). This means that a serving of mature Napoleon grapes (200 g) provides approx equal to 1 mg of resveratrol, which is in the range of the amount supplied by a glass of red wine. This can be increased to 2 or 3 mg of resveratrol per serving in grapes that have been irradiated with UVB or UVC, respectively. These res

ults show that refrigerated storage and UV irradiation of table grapes can be beneficial in terms of increasing the content of potentially health-promoting phenolics.