Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.)
<table style="height: 638px;" border="0" cellspacing="0" cellpadding="0" width="669" align="left"><tbody><tr><td height="638" align="left" valign="top"><p>Onion (<em>Allium c...
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HACCP Consulting
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doaj-f7fea60f1df34fc5ad7b39d313e6d85d2020-11-24T21:54:23ZengHACCP ConsultingPotravinarstvo 1337-09602015-12-019149450010.5219/524389Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.)Petra Kavalcová0Judita Bystrická1Pavol Trebichalský2Miriama Kopernická3Miroslava Hrstková4Marianna Lenková5Slovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 NitraSlovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 NitraSlovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 NitraSlovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 NitraSlovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 NitraSlovak University of Agriculture in Nitra, Faculty of Biotechnology and Food Sciences, Department of Chemistry, Tr. A. Hlinku 2, 949 76 Nitra<table style="height: 638px;" border="0" cellspacing="0" cellpadding="0" width="669" align="left"><tbody><tr><td height="638" align="left" valign="top"><p>Onion (<em>Allium cepa</em> L.) is one of the most important vegetable crops widely consumed in the world. The bulb onion is grown as fresh shoots and as bulbs for consuming uncooked, cooked, and pickled or production of seed and sets. They can be eaten raw, boiled, steamed and roasted. Onion has high nutritional value. Onions are a good source of vitamins, minerals and major component like polyphenols, flavonoids, fructooligosaccharides, thiosulfinates and other sulfur compounds. Polyphenols belong to significant antioxidants in human diet. Antioxidant compounds (polyphenols, flavonoids) scavenge free radicals, inhibit the oxidative mechanisms that lead to degenerative diseases. Antioxidant compounds in food play an important role as a health protecting factor. Onions have a wide range of beneficial properties for human health, such as anti-cholesterolaemic, anti-mutagenic and antioxidant capacity. In this work we evaluated content of total polyphenols and antioxidant activity in selected varieties of onion. Samples of plant material we collected at the stage of full maturity in the locality of Pružina. Pružina is locality without negative influences and emission sources. Total polyphenols content and antioxidant activity were measured in six varieties of onion, namely in red variety (Red matté), in yellow varieties (Boston, Bingo, Sherpa) and white varieties of onion (Diamond, White dry). The content of the total polyphenols was determined by using the Folin-Ciocalteu reagent (FCR). Antioxidant activity was measured by using a compound DPPH˙. In the present experiment it was detected, that total polyphenols content in samples ranges from 142.01 mg.kg<sup>-1 </sup>GAE (white variety of onion- White dry) to 1083.04 mg.kg<sup>-1</sup>GAE (red variety of onion- Red matté). Statistically significant highest value of total polyphenols (1083.04 mg.kg<sup>-1 </sup>GAE) was recorded in variety Red matté. Another indicator that has been evaluated and compared was the antioxidant activity. The values of antioxidant activity were in interval from 7.74% to 41.67%. Based on the measured values of antioxidant activity in onion the samples can beclassified as follows: Red matté (41.67%) > Boston (25.77%) > Sherpa (24.34%) > Bingo (19.54%) > White dry (8.10%) > Diamond (7.74%).</p></td></tr></tbody></table> <!--[endif] -->http://www.potravinarstvo.com/journal1/index.php/potravinarstvo/article/view/524onionvarietycolorpolyphenolsantioxidant activity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Petra Kavalcová Judita Bystrická Pavol Trebichalský Miriama Kopernická Miroslava Hrstková Marianna Lenková |
spellingShingle |
Petra Kavalcová Judita Bystrická Pavol Trebichalský Miriama Kopernická Miroslava Hrstková Marianna Lenková Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) Potravinarstvo onion variety color polyphenols antioxidant activity |
author_facet |
Petra Kavalcová Judita Bystrická Pavol Trebichalský Miriama Kopernická Miroslava Hrstková Marianna Lenková |
author_sort |
Petra Kavalcová |
title |
Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) |
title_short |
Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) |
title_full |
Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) |
title_fullStr |
Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) |
title_full_unstemmed |
Content of total polyphenols and antioxidant activity in selected varieties of onion (Allium cepa L.) |
title_sort |
content of total polyphenols and antioxidant activity in selected varieties of onion (allium cepa l.) |
publisher |
HACCP Consulting |
series |
Potravinarstvo |
issn |
1337-0960 |
publishDate |
2015-12-01 |
description |
<table style="height: 638px;" border="0" cellspacing="0" cellpadding="0" width="669" align="left"><tbody><tr><td height="638" align="left" valign="top"><p>Onion (<em>Allium cepa</em> L.) is one of the most important vegetable crops widely consumed in the world. The bulb onion is grown as fresh shoots and as bulbs for consuming uncooked, cooked, and pickled or production of seed and sets. They can be eaten raw, boiled, steamed and roasted. Onion has high nutritional value. Onions are a good source of vitamins, minerals and major component like polyphenols, flavonoids, fructooligosaccharides, thiosulfinates and other sulfur compounds. Polyphenols belong to significant antioxidants in human diet. Antioxidant compounds (polyphenols, flavonoids) scavenge free radicals, inhibit the oxidative mechanisms that lead to degenerative diseases. Antioxidant compounds in food play an important role as a health protecting factor. Onions have a wide range of beneficial properties for human health, such as anti-cholesterolaemic, anti-mutagenic and antioxidant capacity. In this work we evaluated content of total polyphenols and antioxidant activity in selected varieties of onion. Samples of plant material we collected at the stage of full maturity in the locality of Pružina. Pružina is locality without negative influences and emission sources. Total polyphenols content and antioxidant activity were measured in six varieties of onion, namely in red variety (Red matté), in yellow varieties (Boston, Bingo, Sherpa) and white varieties of onion (Diamond, White dry). The content of the total polyphenols was determined by using the Folin-Ciocalteu reagent (FCR). Antioxidant activity was measured by using a compound DPPH˙. In the present experiment it was detected, that total polyphenols content in samples ranges from 142.01 mg.kg<sup>-1 </sup>GAE (white variety of onion- White dry) to 1083.04 mg.kg<sup>-1</sup>GAE (red variety of onion- Red matté). Statistically significant highest value of total polyphenols (1083.04 mg.kg<sup>-1 </sup>GAE) was recorded in variety Red matté. Another indicator that has been evaluated and compared was the antioxidant activity. The values of antioxidant activity were in interval from 7.74% to 41.67%. Based on the measured values of antioxidant activity in onion the samples can beclassified as follows: Red matté (41.67%) > Boston (25.77%) > Sherpa (24.34%) > Bingo (19.54%) > White dry (8.10%) > Diamond (7.74%).</p></td></tr></tbody></table> <!--[endif] --> |
topic |
onion variety color polyphenols antioxidant activity |
url |
http://www.potravinarstvo.com/journal1/index.php/potravinarstvo/article/view/524 |
work_keys_str_mv |
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