Berry phenolics : isolation, analysis, identification, and antioxidant properties
The main objectives in this thesis were to isolate and identify the phenolic compounds in wild (Sorbus aucuparia) and cultivated rowanberries, European cranberries (Vaccinium microcarpon), lingonberries (Vaccinium vitis-idaea), and cloudberries (Rubus chamaemorus), as well as to investigate the anti...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/27365 2023-08-20T04:09:28+02:00 Berry phenolics : isolation, analysis, identification, and antioxidant properties Kylli, Petri Meyer, Anne S. University of Helsinki, Faculty of Agriculture and Forestry, Department of Food and Environmental Sciences Helsingin yliopisto, maatalous-metsätieteellinen tiedekunta, elintarvike- ja ympäristötieteiden laitos Helsingfors universitet, agrikultur-forstvetenskapliga fakulteten, institutionen för livsmedels- och miljövetenskaper 2011-08-09T11:33:12Z application/pdf http://hdl.handle.net/10138/27365 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-952-10-7114-0 EKT-sarja. 0355-1180 http://hdl.handle.net/10138/27365 URN:ISBN:978-952-10-7115-7 Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. elintarvikekemia Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2011 ftunivhelsihelda 2023-07-28T06:11:03Z The main objectives in this thesis were to isolate and identify the phenolic compounds in wild (Sorbus aucuparia) and cultivated rowanberries, European cranberries (Vaccinium microcarpon), lingonberries (Vaccinium vitis-idaea), and cloudberries (Rubus chamaemorus), as well as to investigate the antioxidant activity of phenolics occurring in berries in food oxidation models. In addition, the storage stability of cloudberry ellagitannin isolate was studied. In wild and cultivated rowanberries, the main phenolic compounds were chlorogenic acids and neochlorogenic acids with increasing anthocyanin content depending on the crossing partners. The proanthocyanidin contents of cranberries and lingonberries were investigated, revealing that the lingonberry contained more rare A-type dimers than the European cranberry. The liquid chromatography mass spectrometry (LC-MS) analysis of cloudberry ellagitannins showed that trimeric lambertianin C and sanguiin H-10 were the main ellagitannins. The berries, rich in different types of phenolic compounds including hydroxycinnamic acids, proanthocyanidins, and ellagitannins, showed antioxidant activity toward lipid oxidation in liposome and emulsion oxidation models. All the different rowanberry cultivars prevented lipid oxidation in the same way, in spite of the differences in their phenolic composition. In terms of liposomes, rowanberries were slightly more effective antioxidants than cranberry and lingonberry phenolics. Greater differences were found when comparing proanthocyanidin fractions. Proanthocyanidin dimers and trimers of both cranberries and lingonberries were most potent in inhibiting lipid oxidation. Antioxidant activities and antiradical capacities were also studied with hydroxycinnamic acid glycosides. The sinapic acid derivatives of the hydroxycinnamic acid glycosides were the most effective at preventing lipid oxidation in emulsions and liposomes and scavenging radicals in DPPH assay. In liposomes and emulsions, the formation of the secondary oxidation product, ... Doctoral or Postdoctoral Thesis Rubus chamaemorus Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
elintarvikekemia |
spellingShingle |
elintarvikekemia Kylli, Petri Berry phenolics : isolation, analysis, identification, and antioxidant properties |
topic_facet |
elintarvikekemia |
description |
The main objectives in this thesis were to isolate and identify the phenolic compounds in wild (Sorbus aucuparia) and cultivated rowanberries, European cranberries (Vaccinium microcarpon), lingonberries (Vaccinium vitis-idaea), and cloudberries (Rubus chamaemorus), as well as to investigate the antioxidant activity of phenolics occurring in berries in food oxidation models. In addition, the storage stability of cloudberry ellagitannin isolate was studied. In wild and cultivated rowanberries, the main phenolic compounds were chlorogenic acids and neochlorogenic acids with increasing anthocyanin content depending on the crossing partners. The proanthocyanidin contents of cranberries and lingonberries were investigated, revealing that the lingonberry contained more rare A-type dimers than the European cranberry. The liquid chromatography mass spectrometry (LC-MS) analysis of cloudberry ellagitannins showed that trimeric lambertianin C and sanguiin H-10 were the main ellagitannins. The berries, rich in different types of phenolic compounds including hydroxycinnamic acids, proanthocyanidins, and ellagitannins, showed antioxidant activity toward lipid oxidation in liposome and emulsion oxidation models. All the different rowanberry cultivars prevented lipid oxidation in the same way, in spite of the differences in their phenolic composition. In terms of liposomes, rowanberries were slightly more effective antioxidants than cranberry and lingonberry phenolics. Greater differences were found when comparing proanthocyanidin fractions. Proanthocyanidin dimers and trimers of both cranberries and lingonberries were most potent in inhibiting lipid oxidation. Antioxidant activities and antiradical capacities were also studied with hydroxycinnamic acid glycosides. The sinapic acid derivatives of the hydroxycinnamic acid glycosides were the most effective at preventing lipid oxidation in emulsions and liposomes and scavenging radicals in DPPH assay. In liposomes and emulsions, the formation of the secondary oxidation product, ... |
author2 |
Meyer, Anne S. University of Helsinki, Faculty of Agriculture and Forestry, Department of Food and Environmental Sciences Helsingin yliopisto, maatalous-metsätieteellinen tiedekunta, elintarvike- ja ympäristötieteiden laitos Helsingfors universitet, agrikultur-forstvetenskapliga fakulteten, institutionen för livsmedels- och miljövetenskaper |
format |
Doctoral or Postdoctoral Thesis |
author |
Kylli, Petri |
author_facet |
Kylli, Petri |
author_sort |
Kylli, Petri |
title |
Berry phenolics : isolation, analysis, identification, and antioxidant properties |
title_short |
Berry phenolics : isolation, analysis, identification, and antioxidant properties |
title_full |
Berry phenolics : isolation, analysis, identification, and antioxidant properties |
title_fullStr |
Berry phenolics : isolation, analysis, identification, and antioxidant properties |
title_full_unstemmed |
Berry phenolics : isolation, analysis, identification, and antioxidant properties |
title_sort |
berry phenolics : isolation, analysis, identification, and antioxidant properties |
publisher |
Helsingin yliopisto |
publishDate |
2011 |
url |
http://hdl.handle.net/10138/27365 |
genre |
Rubus chamaemorus |
genre_facet |
Rubus chamaemorus |
op_relation |
URN:ISBN:978-952-10-7114-0 EKT-sarja. 0355-1180 http://hdl.handle.net/10138/27365 URN:ISBN:978-952-10-7115-7 |
op_rights |
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. |
_version_ |
1774722451218890752 |