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.
17 Aug 2023
This study examined the relationship between stocking rates and honeybee and mason bee abundance in 17 sweet cherry orchards in central Germany. Also, an experiment was conducted to investigate the influence of mason bees and honeybees on fruit set of sweet cherry trees.
19 Aug 2024
The success of these intelligent greenhouses lies in their sophisticated monitoring and control systems. A large screen in the control room displays real-time data on temperature, humidity, light and carbon dioxide levels inside the greenhouse.
30 Jan 2025
For an in-depth look at the topics of varietal innovation and modern commercial development strategies for new cherry varieties, Stefano Lugli of Cherry Times interviewed James Calissi, owner of Calissi Farm, a company specialising in nursery and management of new varieties.
30 Jan 2025
Specialists agree that the new varieties have great potential. However, ‘we have to keep working,’ says Walter Masman. ‘It is essential that growers know the specific characteristics of each variety and handle them appropriately.’
