Related Experiment Video
Updated: Sep 2, 2025

Protocol for Producing Three-Dimensional Infrared Video of Freezing in Plants
Published on: September 12, 2018
Promoting the preservation of strawberry by supercritical CO2 drying
Alessandro Zambon1, Pierantonio Facco1, Gianluca Morbiato1
1Department of Industrial Engineering, University of Padova, via Marzolo 9, 35131 Padova, Italy.
Abstract:
This work aimed to investigate the supercritical CO2 (ScCO2) drying of strawberries and its effect on enzymatic, chemical and microbial stability. Process conditions influenced the final weight loss (WL), water activity (aw) and the inactivation of polyphenol oxidase (PPO) and peroxidase (POD). At 40 °C, an efficient drying (WL > 92 %, aw < 0.34) and a complete enzymatic (POD and PPO activity) inactivation can be achieved using several combinations of pressure, time and flow rate. ScCO2 dried strawberry at 40 °C, 13.3 MPa, 7 h and 19 kg/h flow rate maintain the total content of Vitamin C (358.5 mg/100 g), 95 % of total anthocyanin (61.68 mg/100 g) and 76 % of total flavonoids (25.85 mg/100 g) in comparison with fresh samples. Foodborne pathogens (E.coli O157:H7, Salmonella enterica and Listeria monocytogenes) inoculated at high concentration (≥6 log CFU/g) were undetected after the process. Overall results are promising for the development of a novel low temperature drying process for the production of healthy and safe snack.
More Related Videos
Related Concept Videos
Sublimation
Supercritical Fluid Chromatography
SFC utilizes a supercritical fluid mobile phase,...
Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives
Methods of Sterilization II: Chemical Methods
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Drying Shrinkage
A portion of this drying shrinkage can be reversed; if the concrete is...
Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids

