Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology
Natural by-products, especially flavonoids, are in great demand in the nutra-pharmaceutical and biomedical industries. In this study, Ontario-grown onion varieties, namely Stanley, Safrane, Fortress, Lasalle and Ruby Ring, were screened for their antioxidant properties. Pressurized low polarity wate...
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doaj-2fb5c5117f6847d0ae491933d79129512021-04-30T07:09:35ZengElsevierJournal of Functional Foods1756-46462017-04-01315262Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technologyCynthya Maria Manohar0Jun Xue1Abdul Murayyan2Suresh Neethirajan3John Shi4BioNano Laboratory, School of Engineering, 50 Stone Road East, University of Guelph, Guelph, ON N1G 2W1, CanadaGuelph Food Research Centre, 93 Stone Road West, Agriculture and Agri-Food Canada, N1G 5C9, CanadaBioNano Laboratory, School of Engineering, 50 Stone Road East, University of Guelph, Guelph, ON N1G 2W1, CanadaBioNano Laboratory, School of Engineering, 50 Stone Road East, University of Guelph, Guelph, ON N1G 2W1, Canada; Corresponding author.Guelph Food Research Centre, 93 Stone Road West, Agriculture and Agri-Food Canada, N1G 5C9, CanadaNatural by-products, especially flavonoids, are in great demand in the nutra-pharmaceutical and biomedical industries. In this study, Ontario-grown onion varieties, namely Stanley, Safrane, Fortress, Lasalle and Ruby Ring, were screened for their antioxidant properties. Pressurized low polarity water technology, an environmentally friendly technique, was employed to extract the flavonoids from the onion varieties, followed by quantification and analysis using High Performance Liquid Chromatography. The antioxidant activities in the extracted samples were determined using various antioxidant assays, such as 2,2-diphenyl-1-picrylhydrazyl, 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid), ferric reducing ability of plasma, lipid peroxidation, total antioxidant capacity and oxygen radical absorbance capacity assays. The total phenolic content extracted from the Ruby Ring variety was the highest when compared to all the other yellow onion varieties tested. Our results indicate that Ruby Ring may be chosen as a preferred variety over other onion varieties to develop functional and health food products.http://www.sciencedirect.com/science/article/pii/S1756464617300476Ontario onionsFlavonoidsAntioxidantsPhenolic compoundsPolyphenols |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Cynthya Maria Manohar Jun Xue Abdul Murayyan Suresh Neethirajan John Shi |
spellingShingle |
Cynthya Maria Manohar Jun Xue Abdul Murayyan Suresh Neethirajan John Shi Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology Journal of Functional Foods Ontario onions Flavonoids Antioxidants Phenolic compounds Polyphenols |
author_facet |
Cynthya Maria Manohar Jun Xue Abdul Murayyan Suresh Neethirajan John Shi |
author_sort |
Cynthya Maria Manohar |
title |
Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology |
title_short |
Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology |
title_full |
Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology |
title_fullStr |
Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology |
title_full_unstemmed |
Antioxidant activity of polyphenols from Ontario grown onion varieties using pressurized low polarity water technology |
title_sort |
antioxidant activity of polyphenols from ontario grown onion varieties using pressurized low polarity water technology |
publisher |
Elsevier |
series |
Journal of Functional Foods |
issn |
1756-4646 |
publishDate |
2017-04-01 |
description |
Natural by-products, especially flavonoids, are in great demand in the nutra-pharmaceutical and biomedical industries. In this study, Ontario-grown onion varieties, namely Stanley, Safrane, Fortress, Lasalle and Ruby Ring, were screened for their antioxidant properties. Pressurized low polarity water technology, an environmentally friendly technique, was employed to extract the flavonoids from the onion varieties, followed by quantification and analysis using High Performance Liquid Chromatography. The antioxidant activities in the extracted samples were determined using various antioxidant assays, such as 2,2-diphenyl-1-picrylhydrazyl, 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid), ferric reducing ability of plasma, lipid peroxidation, total antioxidant capacity and oxygen radical absorbance capacity assays. The total phenolic content extracted from the Ruby Ring variety was the highest when compared to all the other yellow onion varieties tested. Our results indicate that Ruby Ring may be chosen as a preferred variety over other onion varieties to develop functional and health food products. |
topic |
Ontario onions Flavonoids Antioxidants Phenolic compounds Polyphenols |
url |
http://www.sciencedirect.com/science/article/pii/S1756464617300476 |
work_keys_str_mv |
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