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  • Title: Prestorage heat treatment to maintain nutritive and functional properties during postharvest cold storage of pomegranate.
    Author: Mirdehghan SH, Rahemi M, Serrano M, Guillén F, Martínez-Romero D, Valero D.
    Journal: J Agric Food Chem; 2006 Nov 01; 54(22):8495-500. PubMed ID: 17061826.
    Abstract:
    Heat treatments have been used to extend storability of several fruits, although no information is available about their effects on nutritive and functional properties in pomegranates, which was the objective of this research. Thus, pomegranate fruits were heat treated (dips at 45 degrees C for 4 min) and stored at 2 degrees C for 90 days. Every 15 days, samples were taken and further stored 2 days at 20 degrees C for shelf life study. Arils from heat-treated pomegranates exhibited higher total antioxidant activity than controls, which was correlated primarily to the high levels of total phenolics and to lesser extent to ascorbic acid and anthocyanin contents. Additionally, the levels of sugars (glucose and fructose) and organic acids (malic, citric, and oxalic acids) remained also at higher concentrations in arils from treated fruits. With this simple and non-contaminant technology, the functional and nutritive properties, after long periods of storage, could then be even greater than in recently harvested fruits, thus providing a high content in health-beneficial compounds to consumers after the intake of these fruits.
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