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Yield and Quality Effects of Electroplasmolysis and Microwave Applications on Carrot Juice Production and Storage
Author(s) -
Rayman Ahsen,
Baysal Taner
Publication year - 2011
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1750-3841.2011.02156.x
Subject(s) - pectin , yield (engineering) , pasteurization , food science , microwave , chemistry , response surface methodology , microwave heating , fruit juice , pulp and paper industry , materials science , chromatography , composite material , physics , quantum mechanics , engineering
Electroplasmolysis as a pretreatment and microwave heating as an alternative to traditional heating were used in carrot juice production and the effects of these electrical methods on juice quality were investigated. Electroplasmolysis and microwave applications were optimized by response surface methodology. Optimum conditions were these: voltage gradient of 22.2 V/cm and treatment time of 60 s for electroplasmolysis, and flow rate of 90 mL/min with power of 900 W for microwave heating. Production of carrot juice was carried out by using these optimum conditions. After production, carrot juice samples were stored for 4 mo at +4 °C and analyses were performed at monthly intervals. As a result of electroplasmolysis, a 9.7% increase in juice yield was obtained. In addition, 100% pectin methylesterase inactivation was found with the microwave heating application. The results showed that the highest values for quality characteristics, such as antioxidant capacity and total pectin, total phenolic, and total carotenoid contents, were obtained with the combined applications of the electrical methods. In addition, these quality characteristics were protected better in the group of combined applications of the electrical methods (electroplasmolysis + microwave) during storage. Practical Application: Yield increase is a major objective in fruit and vegetable juice production. This study concluded that electroplasmolysis provided an increase in yield and also improved quality characteristics. Microwave heating was used as an alternative to traditional pasteurization. Applications can be adapted to production lines in industry.