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  • Title: Stabilisation of red fruit-based smoothies by high-pressure processing. Part II: effects on sensory quality and selected nutrients.
    Author: Hurtado A, Guàrdia MD, Picouet P, Jofré A, Ros JM, Bañón S.
    Journal: J Sci Food Agric; 2017 Feb; 97(3):777-783. PubMed ID: 27170436.
    Abstract:
    BACKGROUND: Non-thermal pasteurisation by high-pressure processing (HPP) is increasingly replacing thermal processing (TP) to maintain the properties of fresh fruit products. The resulting products need to be validated from a sensory and nutritional standpoint. The objective was to assess a mild HPP treatment to stabilise red fruit-based smoothies in a wide (sensory quality and major nutrients) study. RESULTS: HPP (350 MPa/ 10 °C/ 5 min) provided 'fresh-like' smoothies, free of cooked-fruit flavours, for at least 14 days at 4 °C, although their sensory stability was low compared with the TP-smoothies (85 °C/ 7 min). In HPP-smoothies, the loss of fresh fruit flavour and reduced sliminess were the clearest signs of sensory deterioration during storage. Furthermore, HPP permitted the higher initial retention of vitamin C, although this vitamin and, to a lesser extent, total phenols, had a higher degradation rate during storage. The content of sugar present was not affected by either processing treatment. CONCLUSION: Mild HPP treatment did not alter the sensory and nutritional properties of smoothies. The sensory and nutritional losses during storage were less than might be expected, probably due to the high antioxidant content and the natural turbidity provided by red fruits. © 2016 Society of Chemical Industry.
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