naa a22 4500 510725449 CHVBK 20180411082933.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11947-012-0978-3 doi (NATIONALLICENCE)springer-10.1007/s11947-012-0978-3 Utilisation Potential of Feijoa Fruit Wastes as Ingredients for Functional Foods [Elektronische Daten] [Dongxiao Sun-Waterhouse, Wei Wang, Geoffrey Waterhouse, Sandhya Wadhwa] Feijoa fruits have high antioxidant activity as they contain significant concentrations of polyphenols (PPs), carotenoids and vitamins. This study evaluates the colour, pH, total soluble solids (TSS), pectin fibre content, total extractable PP content (TEPC) and total antioxidant activity of the extracts generated from the fruit wastes (primarily skin and some flesh) remaining after feijoa flesh consumption. Extractions were conducted at room temperature and 50°C using accelerated solvent extraction technology and different extraction media [water, acidified water (containing citric acid, pH 3.5), and 30, 50 and 80% (v/v) aqueous ethanol solutions]. Results show that the composition and properties of the extracts depend on the extraction media and, to a lesser extent, on the extraction temperature. The 80% ethanolic extract was bright green in colour. The water and acidified water extracts showed more browning than the ethanolic extracts, suggesting possible detrimental sensory impacts for food applications. The TSS decreased in the order of 80, 50 and 30% ethanolic and water extracts. The 50% ethanolic extract had the highest TEPC and antioxidant activity at both extraction temperatures, which was supported by high performance liquid chromatography analyses. The extracts produced with solutions containing less ethanol, especially water extracts, had higher pectin contents. The UA content of the extract produced using water alone was the highest (5.56% as GalA) at 20°C, whilst that produced using 30% ethanol solution was the highest (3.90% as GalA) at 50°C. Higher extraction temperature (50°C) resulted in lower pectin contents. These results demonstrate the potential of feijoa waste extracts, especially 50 and 80% ethanolic extracts, as ingredients for functional food applications. Springer Science+Business Media New York, 2012 Acidified water extract nationallicence Feijoa wastes nationallicence Fibre polysaccharides nationallicence Aqueous ethanolic extract nationallicence Polyphenols nationallicence Water extract nationallicence Sun-Waterhouse Dongxiao The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut Wang Wei The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut Waterhouse Geoffrey School of Chemical Sciences, The University of Auckland, Auckland, New Zealand aut Wadhwa Sandhya The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut Food and Bioprocess Technology Springer US; http://www.springer-ny.com 6/12(2013-12-01), 3441-3455 1935-5130 6:12<3441 2013 6 11947 https://doi.org/10.1007/s11947-012-0978-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11947-012-0978-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sun-Waterhouse Dongxiao The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut NATIONALLICENCE 700 1- Wang Wei The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut NATIONALLICENCE 700 1- Waterhouse Geoffrey School of Chemical Sciences, The University of Auckland, Auckland, New Zealand aut NATIONALLICENCE 700 1- Wadhwa Sandhya The New Zealand Institute for Plant & Food Research Limited, Mt Albert Research Centre, Private Bag 92169, 1020, Auckland, New Zealand aut NATIONALLICENCE 773 0- Food and Bioprocess Technology Springer US; http://www.springer-ny.com 6/12(2013-12-01), 3441-3455 1935-5130 6:12<3441 2013 6 11947 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer