Journal
FOOD CHEMISTRY
Volume 270, Issue -, Pages 113-122Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.07.031
Keywords
Phytochemicals; Biosynthesis; Cavitation; Dosage; Permeability; Membrane; Hydrophilic; Lipophilic
Funding
- Universiti Putra Malaysia, Malaysia [GP-I/2014/9439000]
- Niger Delta Development Commission, Nigeria [NDDC/DEHSS/2014PGFS/AKS/014]
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The effects of a novel technology utilizing a simultaneous combination of Ultraviolet-C radiation and ultrasound energy postharvest treatment on tomato bioactive compounds during 28 days' storage period was investigated by varying Ultraviolet-C radiation intensities of 639.37 or 897.16 mu W/cm(2) at a constant ultrasound intensity of 13.87 W/L from a 40 kHz-1 kW transducer. A minimal treatment time of 240s at Ultraviolet-C dosage of 2.15 kJ/m(2) was observed to provoke a considerable increase in bioactive compounds content, proportionated to treatment time. Although treatment led to temperature increase in the system reaching 39.33 degrees C due to heat generation by ultrasonic cavitation, the extractability and biosynthesis of phytochemicals were enhanced resulting in 90%, 30%, 60%, 20%, and 36% increases in lycopene, total phenols, vitamin C, hydrophilic and lipophilic antioxidant activities respectively. Results present the potential use of the combined non-thermal technologies as post-harvest treatment to improve bioactive compounds and antioxidant activity during storage.
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