Zhan Lijuan, Bulgari Roberta, Pignata Giuseppe, Casale Manuela, Nicola Silvana
College of Food Science and Technology, Henan Agricultural University (HAU), Wenhua Road 95, Zhengzhou 450002, China.
Department of Agricultural, Forest and Food Sciences (DISAFA), Vegetable Crops & Medicinal and Aromatic Plants, VEGMAP, University of Turin, UNITO, Largo Paolo Braccini 2, 10095 Grugliasco, TO, Italy.
Foods. 2022 Nov 4;11(21):3515. doi: 10.3390/foods11213515.
Different types of baby leaf vegetables (BLV) are often mixed and packaged as salad mixes. This work has evaluated the effects of BLV mixing ratios (100% lettuce 'Lollo Bionda', 100 LB; 75% lettuce + 25% rocket, 75 LB; 50% lettuce + 50% rocket, 50 LB) and the weight filling amount (125 g filling amount, 125F; 250 g, 250F) on the antioxidant properties and browning potential (BP) of lettuce and rocket baby leaves during storage for 9 days at 4 °C in the dark. The samples were packaged in thermos-sealed bags previously prepared using polypropylene film. The results showed that the 50 LB mix had preserved high amounts of chlorophylls and internal nutrients on d9, regardless of the filling amount. No visible browning symptoms were detected in the 50 LB samples. The 50 LB × 125F mix was found to be the most efficient strategy to maintain the antioxidant property of BLV. Thus, the optimisation of the mixing ratio and its combination with an appropriate filling amount could represent an effective postharvest practice.
不同类型的婴儿叶菜（BLV）通常混合包装成沙拉混合物。这项研究评估了BLV混合比例（100%生菜‘洛洛比昂达’，100 LB；75%生菜+25%芝麻菜，75 LB；50%生菜+50%芝麻菜，50 LB）以及重量填充量（125克填充量，125F；250克，250F）对生菜和芝麻菜婴儿叶在4℃黑暗条件下储存9天期间抗氧化特性和褐变潜力（BP）的影响。样品包装在先前用聚丙烯薄膜制备的热封袋中。结果表明，无论填充量如何，50 LB混合物在第9天保留了大量的叶绿素和内部营养成分。在50 LB样品中未检测到明显的褐变症状。发现50 LB×125F混合物是维持BLV抗氧化特性的最有效策略。因此，优化混合比例并将其与适当的填充量相结合可能是一种有效的采后处理方法。
