Effects of ultrasound pretreatment assisted drying methods on drying characteristics, physical and bioactive properties of windfall apples


Journal of the Science of Food and Agriculture, vol.103, no.2, pp.534-547, 2023 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 103 Issue: 2
  • Publication Date: 2023
  • Doi Number: 10.1002/jsfa.12164
  • Journal Name: Journal of the Science of Food and Agriculture
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Periodicals Index Online, Aerospace Database, Agricultural & Environmental Science Database, Analytical Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, EMBASE, Food Science & Technology Abstracts, INSPEC, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.534-547
  • Keywords: apple, ultrasound, texture, ascorbic acid, phenolic content, color, ANTIOXIDANT CAPACITY, HOT-AIR, BIOCHEMICAL PARAMETERS, VITAMIN-C, KINETICS, FRUITS, COLOR, TEMPERATURE, L., TEXTURE
  • Kayseri University Affiliated: No


© 2022 Society of Chemical Industry.BACKGROUND: Drying is one of the most important post-harvest processes in order to ensure that the products harvested in certain periods are consumed throughout the year. In this study, Golden Delicious, Oregon Spur and Granny Smith apple cultivars (fallen apples) were dried in open-sun, a controlled glasshouse, microwave oven (200 W), hybrid system (100 W + 60 °C), convective greenhouse (70 °C) and freeze-dryer (−55 °C) with and without ultrasound pretreatments. RESULTS: Present findings revealed that the longest drying duration was observed in freeze-drying and the shortest in microwave drying. The greatest color change (ΔE) was observed in ultrasound pretreated Oregon Spur apples dried in a controlled glasshouse. The greatest total phenolics (40.08 mg GAE g−1), DPPH (2,2-diphenyl-1-picrylhydrazyl) inhibition activity (46.96%), FRAP (ferric reducing ability of plasma) antioxidant activity (68.01 μg Trolox g−1) and ascorbic acid content (1.52 mg AAE g−1) were observed in open sun-dried Granny Smith apples without ultrasound pretreatment. CONCLUSIONS: Generally, microwave and hybrid drying yielded better outcomes for bioactive, HMF (5-hydroxymethyl-2-furfural) and drying characteristics of windfall apples. © 2022 Society of Chemical Industry.