Related Experiment Video
Updated: Dec 26, 2025

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
Published on: May 19, 2019
Improving quality and quantity attributes of grape juice concentrate (molasses) using ohmic heating
Hosain Darvishi1, Mahmoud Koushesh Saba2, Nasser Behroozi-Khazaei1
11Department of Biosystems Engineering, Faculty of Agriculture, University of Kurdistan, P.O. Box: 416, Sanandaj, Kurdistan Iran.
Abstract:
The effect of ohmic heating method (OHM) on quality and quantity attributes of black grape molasses was investigated and compared with the conventional heating method (CHM). Results showed that the samples prepared by OHM had the highest antioxidant activity than CHM. Increasing of voltage gradient had a positive effect on the saving of antioxidant activity. Changes in pH for OHM were lower than CHM. Heating methods had no significant effect on phenol content. Antioxidant capacity and phenol content of treated samples were lower than the fresh sample at the same water content. The titratable acidity of treated samples using CHM was higher than the OHM. The OHM saved about 2.4-7.2-fold of processing time and 6.3-fold of energy consumption than the CHM. Heat generation and electrical conductivity depended on sample moisture content. OHM provides minimal damage to the sensory characteristics. As a final result, the OHM significantly improved the quality and saved the quantity parameters of the grape molasses processing than the CHM.
More Related Videos
07:07Controlled-release of Chlorine Dioxide in a Perforated Packaging System to Extend the Storage Life and Improve the Safety of Grape Tomatoes
Published on: April 7, 2017
11:06Comparison of Tobacco Host Cell Protein Removal Methods by Blanching Intact Plants or by Heat Treatment of Extracts
Published on: August 8, 2016
Related Concept Videos
Physical Methods for Controlling Microbial Growth: Temperature
Quantifying Heat
Precipitation Processes
Aqueous Solutions and Heats of Hydration
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
Calorimetry
Physical Methods for Controlling Microbial Growth: Radiation and Filtration