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PEF assisted extraction of bioactive compounds from tomato by-products

STSM by Daniela Nikolovska Nedelkoska, Early-Stage Researcher

Period of mission: from 04/05/2015 to 23/05/2015

Home institution: Faculty of Technology and Technical Sciences, University “St. Kliment Ohridski”, Veles, Republic of Macedonia

Host institution: ProdAl Scarl, University of Salerno, Fisciano, Italy

Tomato by-products, namely peel and seeds, account for about 10-40% of the millions of tons of tomato fruit processed every year to produce different type of products. 

This by-products represent a cheap and reach source of the health-promoting phytonutrients, that are traditionally recovered by extraction with solvents which is a time consuming process and requires large quantities of solvents. 

The investigation was conducted to evaluate the effect of pulsed electric field (PEF) treatment for enhancing valuable compounds extraction from tomato by-products. The process was based on the application a PEF pre-treatment at electric field strengths in the range 0.5-5 kV/cm and energy input between 10 and 40 kJ/kg to tomato peels. The effects of the different PEF processing conditions were defined, and the extraction yield of lycopene, total carotenoids and total phenolics was determined. Additionally, the determination of the antioxidant activity of the extracts was performed. 

The results demonstrated that a significantly higher amount of total carotenoids, lycopene and total phenolics was detected in the extracts from PEF pre-treated peels in comparison with those present in the extracts from untreated peels.

The antioxidant capacity of the extracts obtained from tomato peel was correlated with the concentration of the extracted compounds. 

The results indicate that the utilization of PEF technology as pre-treatment stage of the extraction process of valuable bioactive compounds from tomato by-products could add new value to the tomato processing chain, improving economic performance and decreasing waste problems.

Oral presentation(s) originating from this mission

Event 29th EFFoST International Conference - Food Science Research and Innovation
Location Athens/Greece
Period 10/11-12/11/2015
Authors G. Pataro, D. Nikolovska Nedelkoska, D. Carullo, M.M. Capitoli, G. Ferrari
Title PEF treatment for the valorization of tomato by-products

Poster presentation(s) originating from this mission

Event 1st World Congress on Electroporation and Pulsed Electric Fields in Biology, Medicine and Food & Environmental Technologies
Location Portorož/Slovenia
Period

06/09 - 10/09/2015

Authors D. Nikolovska Nedelkoska, G. Pataro, D. Carullo, M.M. Capitoli, G. Ferrari
Title Pulsed electric field assisted extraction of carotenoids from tomato by­products

 


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