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Effect of microwave processing on the nutritional properties and allergenic potential of kiwifruit
Jin Wang1, Lili Zhang2, Jialu Shi2
1Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, and Department of Nutrition and Food Hygiene, School of Public Health, Southeast University, Nanjing 210009, China; Department of Bioresource Engineering, Faculty of Agricultural and Environmental Sciences, McGill University, Sainte-Anne-de-Bellevue, QC H9X3V9, Canada.
Abstract:
Kiwifruit is an excellent source and has highly drawn attention due to its essential nutrients and health benefits. However, kiwifruit can trigger allergenic symptoms and cause health problems worldwide. This study aimed to evaluate the impact of microwave processing on the nutritional properties and allergenicity of kiwifruit. Samples were treated with microwave at 75 ℃ for 0-5 min. The microstructure, color attributes, allergen (Act d 2) content, in vitro digestibility, and secondary structure of kiwifruit protein were determined. The results found that microwave processing significantly increased the total antioxidant activity by disrupting the microstructure of kiwifruit tissues. The digestibility and peptide content of kiwifruit protein was improved. Whereas a negative effect on the color attributes and sugar content was observed. An 80 % reduction in Act d 2 content was observed after a 5-min microwave treatment. Therefore, microwave processing showed a potential application in reducing kiwifruit allergenicity.
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