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European Food Research and Technology : Volume 243, Issue 1, January 2017

European Food Research and Technology : Volume 242

European Food Research and Technology : Volume 224

An evaluation of the antioxidant properties of Arthrospira maxima extracts obtained using non-conventional techniques

Content Provider	Springer Nature Link
Author	Giorgis, Marta Garella, Davide Cena, Clara Boffa, Luisa Cravotto, Giancarlo Marini, Elisabetta
Copyright Year	2016
Abstract	In last decade, Arthrospira has been considered an important source of high-quality nutrients and therefore it is suggested as a suitable functional food. In this work, Arthrospira maxima extracts were obtained in different conditions, varying solvents, time, temperature and extraction techniques, such as microwave- and ultrasound-assisted extraction (MAE and UAE, respectively). Total carotenoids and polyphenols were measured using UV determination tests, while HPLC analyses were carried out to identify the main compounds. Antioxidant activity of A. maxima extracts was evaluated in vitro by Trolox equivalent antioxidant capacity (TEAC) and oxygen radical absorbance capacity (ORAC). Acetone/hexane and acetone extracts were in general the richest in β-carotene and total carotenoids (20–33 and 40–70 mg/g extract, respectively). The best results were obtained under MAE at 90 °C for 10 min with the highest yields in terms of total carotenoids and β-carotene (>2.6 and >1.0 mg/g algae, respectively). MAE with ethanol (90 °C, 30 min) allowed maximization of total carotenoids and β-carotene amount (3.12 and 1.37 mg/g algae, respectively) thanks to the very good extraction yields. Moreover, this technique gave an extract with the highest antioxidant activity (812 and 519 µmol Trolox/g extract for TEAC and ORAC, respectively). Surprisingly, polyphenols were not detected in A. maxima extracts analyzed by HPLC.
Starting Page	227
Ending Page	237
Page Count	11
File Format	PDF
ISSN	14382377
Journal	European Food Research and Technology
Volume Number	243
Issue Number	2
e-ISSN	14382385
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-07-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arthrospira maxima Microalgae Antioxidant activity Carotenoids Ultrasound Microwaves Food Science Analytical Chemistry Biotechnology Agriculture Forestry
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Chemistry Biochemistry Food Science Biotechnology

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