Articles

METABOLIC RESPONSE TO UV-C TREATMENTS ON MINIMALLY PROCESSED POMEGRANATE ARILS

Article number
877_86
Pages
657 – 662
Language
English
Abstract
Pomegranates have a high amount of phenolic compounds and high antioxidant activity.
However, due to the difficulty to peel its consumption is not very high.
Ready to eat pomegranate arils could be a way to increase its consumption but for this to be possible there is the need to find a safe and environmentally friendly method to control food-borne pathogens and preserve the nutritional properties.
UV-C illumination could be a solution for the preservation of the minimally processed arils.
UV-C technology has direct effect on the pathogens and indirect effect by the stimulation of host-defense responses.
One of the possible mechanisms of host resistance is the production of certain enzymes by fruits.
In this research the metabolic response to different UV-C treatments on pomegranate arils was studied.
After UV-C illumination total phenol, titratable acidity and soluble solids were evaluated.
The UV-C illumination doses applied to pomegranate arils were 4.5, 6.5 and 8.5 kJ/m2. Non-illuminated arils were used as the control treatment.
Fruits were stored at 2°C and then kept in shelf-life at 6°C. The soluble solids content and citric acid percentage did not seem to be affected by the UV-C illumination.
The experiment also showed that UV-C illumination has an effect on the increase of phenol content in pomegranate arils during the storage and shelf life.

Publication
Authors
C. Nunes, A. Graça, I. Yıldırım, G. Sahin, M. Erkan
Keywords
phenolic compounds, antioxidant activity, ready-to-eat, UV-C illumination
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