壳聚糖涂膜结合冰温贮藏对蓝莓活性成分及抗氧化活性的影响

以蓝莓为试材，研究冷藏、壳聚糖涂膜、冰温和壳聚糖涂膜结合冰温贮藏对蓝莓活性成分含量及抗氧化活性的影响。结果表明，与直接冷藏相比，壳聚糖涂膜、冰温以及壳聚糖涂膜结合冰温贮藏都能有效延缓蓝莓果实贮藏过程中总花色苷、VC、总酚和总黄酮含量的下降，蓝莓果实中总花色苷、总酚和总黄酮含量与1,1-二苯基-2-三硝基苯肼自由基清除能力之间均呈显著正相关，能更好地保持蓝莓的抗氧化活性。而壳聚糖涂膜结合冰温贮藏的效果优于单独采用冰温或壳聚糖涂膜贮藏。因此，壳聚糖涂膜结合冰温贮藏能较好地保持蓝莓活性成分含量及抗氧化活性，是一种较为有效的蓝莓贮藏方法。

Effect of Chitosan Coating Combined with Freezing-Point Storage on Active Compounds and Antioxidant Capacity of Blueberry Fruits

This study was performed to investigate the effect of refrigeration, and freezing-point storage and chitosan coating
individually or in combination with each other on active components and antioxidant activity of blueberries. The results
showed that all freezing-point storage, chitosan coating and their combination effectively retarded the decrease in total
anthocyanins, vitamin C, total phenols and flavonoids and maintained antioxidant capacity in blueberries compared with the
control (direct refrigeration). There were positive correlations of 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) scavenging
capacity with the contents of total anthocyanins, total phenols and total flavonoids. The combined treatment was more
effective than either treatment alone. Therefore, chitosan coating combined with freezing-point storage can be the method of
choice for maintaining active components and antioxidant capacity of blueberries.