Institute of Food Engineering and Biology Technique, Tianjin University of Science and Technology, Tianjin 300457, People's Republic of China.
Carbohydr Polym. 2013 Jun 5;95(1):371-8. doi: 10.1016/j.carbpol.2013.03.029. Epub 2013 Mar 13.
Surface coatings and films are prospective alternatives for extending the postharvest life of fresh fruits and vegetables. In this study, freshly harvested grapes were treated with chitosan, glucose, chitosan-glucose complex (CGC), or water (control) for up to 60 days at 0 °C in 95% relative humidity followed by 3 days in the air at 20 °C. The results showed that coated samples were effective in terms of senescence inhibition and postharvest diseases prevention. Chitosan-glucose complex showed better effects on delaying the declines of total soluble solids, ascorbic acid and titratable acidity, decreasing decay and weight loss, suppressing respiration rate, inducing POD and SOD activities, in comparison with pure chitosan or glucose. In addition, CGC coating treatment ensured better berry texture and higher sensory scores, compared with those treated with chitosan or glucose alone. The results indicated that CGC may be a promising strategy for improving the postharvest quality and extending the shelf life of table grapes.
表面涂层和薄膜是延长新鲜水果和蔬菜采后寿命的有前途的替代品。在这项研究中，新鲜收获的葡萄用壳聚糖、葡萄糖、壳聚糖-葡萄糖复合物（CGC）或水（对照）处理，在 0°C 下相对湿度为 95%的条件下处理长达 60 天，然后在 20°C 的空气中处理 3 天。结果表明，涂层样品在抑制衰老和预防产后疾病方面有效。与纯壳聚糖或葡萄糖相比，壳聚糖-葡萄糖复合物在延缓总可溶性固体、抗坏血酸和可滴定酸度的下降、降低腐烂和失重、抑制呼吸速率、诱导过氧化物酶和超氧化物歧化酶活性方面表现出更好的效果。此外，与单独用壳聚糖或葡萄糖处理的浆果相比，CGC 涂层处理确保了更好的浆果质地和更高的感官评分。结果表明，CGC 可能是提高鲜食葡萄采后品质和延长货架寿命的一种有前途的策略。
