L. Frisón, María Zoé Rivas, Carolina Chiericatti, A. Piagentini
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引用次数: 0
摘要
模拟了UV-C辐射（体外试验：4 W m-2，持续20分钟）对从蓝莓中分离的四种更常见和更丰富的霉菌（黑曲霉、斑节孢霉、卧青霉和白三叶草）的分生孢子的影响。霉菌数量的减少发生在处理的10分钟内。将所选择的处理应用于用两种最具抗性霉菌的分生孢子接种的蓝莓样品（体内测试：黑曲霉和斑节孢霉）。UV-C辐射（2,4kJ m-2，10分钟）略微增加了pH值，但没有显著改变蓝莓的可溶性固形物含量、硬度和颜色。与未处理的样品相比，用UV-C处理增加了蓝莓的总酚浓度（13%）和抗氧化能力（8%）。识别污染菌群以正确实施处理至关重要。UV-C选择的剂量保持了与蓝莓的感官质量、酚类化合物含量增加和抗氧化能力有关的属性。
Efecto de la radiación UV-C sobre la calidad y la flora fúngica contaminante natural de arándanos (Vaccinium corymbosum L., variedad O’Neal)
The effect of UV-C radiation (in vitro tests: 4 W m-2, for 20 min) on the conidia of the four more frequent and abundant molds isolated from blueberry (Aspergillus niger, Arthrinium phaeospermun, Penicillium decumbens, and Eurotium repens) was modeled. The reduction in mold counts occurred up to 10 minutes of treatment. The selected treatment was applied to the blueberry samples inoculated with the conidia of the two most resistant molds (in vivo tests: Aspergillus niger and Arthrinium phaeospermun). UV-C radiation (2,4 kJ m-2, 10 minutes) slightly increased the pH value without significantly modifying the soluble solids content, firmness, and color of blueberries. Treatment with UV-C increased the concentration of total phenols (13%) and the antioxidant capacity of blueberries (8%) compared to the untreated sample. It is essential to identify the contaminating microflora to correctly apply the treatment. The UV-C selected dose maintained the attributes related to sensory quality, increasing the content of phenolic compounds, and the antioxidant capacity of blueberries.
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