Boghossian Magali, Brassesco María Emilia, Miller Fátima A, Silva Cristina L M, Brandão Teresa R S
CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.
Foods. 2023 Feb 1;12(3):622. doi: 10.3390/foods12030622.
The peels of many fruits are rich sources of nutrients, although they are not commonly consumed. If they are properly decontaminated, they can be used as healthy food ingredients reducing food waste. The objective was to apply thermosonication processes to kiwi peel and evaluate the impact on survival (a non-pathogenic surrogate of ) and key nutrients and quality indicators: proteins, fibers, minerals (Ca, K, Mg, Na, and P), chlorophylls, and phenolic contents. Kiwi peels were artificially inoculated with and thermal and thermosonication treatments were performed at 55 °C and 60 °C for 30 and 15 min maximum, respectively. Bacteria were enumerated through treatment time, and quality indicators were assessed before and at the end of treatments. A Weibull model with a decimal reduction time (D-value) was successfully used in survival data fits. Results showed that coupling temperature to ultrasound had a synergistic effect on bacteria inactivation with significant decreases in D-values. Thermosonication at 60 °C was the most effective in terms of protein, fiber, chlorophylls, and phenolics retention. Minerals were not significantly affected by all treatments. Applying thermosonication to kiwi peel was more effective for decontamination than thermal treatments at the same temperature while allowing the retention of healthy compounds.
许多水果的果皮富含营养成分，尽管通常不被食用。如果对其进行适当的去污处理，它们可以用作健康的食品成分，从而减少食物浪费。目的是将热超声处理应用于猕猴桃皮，并评估其对 （一种非致病性替代物）的存活以及关键营养成分和质量指标的影响：蛋白质、纤维、矿物质（钙、钾、镁、钠和磷）、叶绿素和酚类含量。猕猴桃皮人工接种 ，分别在55℃和60℃下进行热和热超声处理，最长处理时间分别为30分钟和15分钟。通过处理时间对细菌进行计数，并在处理前和处理结束时评估质量指标。具有十进制减少时间（D值）的威布尔模型成功用于 存活数据拟合。结果表明，将温度与超声耦合对细菌失活具有协同作用，D值显著降低。就蛋白质、纤维、叶绿素和酚类物质的保留而言，60℃的热超声处理最为有效。所有处理对矿物质均无显著影响。在相同温度下，对猕猴桃皮应用热超声处理比热处理更有效地进行去污，同时能保留健康化合物。
