Application of pretreatment methods such as ultrasound and edible coatings is used to reduce processing time and/or preserve food product quality in drying technology.
The aim of this research from Department of Food Science and Technology, Bu-Ali Sina University, Hamedan (Iran), was to measure the impacts of gum-based coatings (guar, sodium alginate, and basil seed gums) in combination with sonication before drying on total phenolic content (TPC), antioxidant capacity (AC), effective water diffusivity (Deff), total color difference (ΔE), surface shrinkage (SS), and rehydration ratio (RR) of sour cherries.
Ultrasonic pretreatment (40 kHz, 150 W, at 25 °C, for 12 min) increased the TPC, AC, Deff, and RR, and decreased the drying time, ΔE, and SS values of sour cherries. Edible coating increased the TPC, AC, drying time, and RR, and decreased the Deff, ΔE, and SS values of sonicated sour cherries.
The TPC for untreated, uncoated-sonicated, guar gum-coated, sodium alginate-coated, and basil seed gum-coated sour cherries were 2965.9, 3398.1, 3480.8, 3511.0, and 3898.3 µg gallic acid equivalent/g dry, respectively. The highest value of AC (71.2±3.7 %) was observed on coated sour cherries by basil seed gum.
The experimental data for drying curves were fitted to several widely used models, and the Midilli model using the experimental constants that best represent the drying rate of sour cherries.
The edible coatings significantly reduced the color changes and shrinkage of dried sour cherries, with the lowest ΔE and SS values in the basil seed gum-coated samples (p < 0.05).
Fonte: Fakhreddin Salehi, Moein Inanloodoghouz, Effects of gum-based coatings combined with ultrasonic pretreatment before drying on quality of sour cherries, Ultrasonic Sonochemistry, vol. 100, 2023, https://doi.org/10.1016/j.ultsonch.2023.106633.
09 Jul 2025
Poland’s cherry output is forecast at just 115,000 tons in 2025/26, marking a 30% drop due to severe spring frosts. Early varieties were worst hit, with some orchards losing up to 90%. Imports rise sharply while domestic inventories vanish, tightening the EU market.
20 Nov 2025
The 2025 cherry season in Washington delivered top-tier fruit, but growers faced severe market setbacks. Despite high volumes and great quality, prices dropped. CFS reviews the challenges, market delays, and future strategies to support orchard investors.
23 Jan 2026
Two clinical studies confirm that daily intake of concentrated tart cherry extracts significantly reduces inflammatory markers such as CRP and blood urate levels, opening new perspectives for the functional role of tart cherry in supporting long-term metabolic health.
23 Jan 2026
A study from Chile proves that controlled atmosphere with 10-15% CO2 and 10% O2 extends Regina cherries' shelf life up to 40 days while preserving quality and flavor—an effective solution to improve logistics for long-distance exports, especially to Asia.
