Total polyphenols, flavonoids and antiradical activity of vegetables dried in conventive and microwave- vacuum driers

Liga Priecina, Daina Karklina

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Fruits and vegetables are a major source of antioxidants. The aim of current research was to study and compare the antiradical activity, the total polyphenol content (TPC) and the total flavonoid content (TFC) in dried carrots (Daucuscarrota), pumpkins (Cucurbita maxima), leeks (Allium ampeloprasumvarporrum) and black radish (Raphamussativus) using a traditional conventive drier and a microwave-vacuum drier. For each vegetable steaming as pretreatment was used. Vegetables were harvested in Latvia in 2012, gathered when ripe and then dried. Analyses were made in Latvia University of Agriculture, Faculty of Food Technology laboratories. The total polyphenol content was determined by the Folin- Ciocalteu method and the total flavonoid content - using spectrophotometric method. The antiradical activity was analyzed by the 2,2-diphenyl-1-picrilhydrazyl (DPPH) assay. The results of experiments demonstrate that the total amount of polyphenols ranged from 98.97 to 623.70 mg gallic acid equivalent (GAE) 100 g-1 in dry weight and the total amount of flavonoids ranged from 40.32 to 100.23 mg catechin equivalent (CE) 100 g-1 in dry weight. The value of DPPH antiradical activity for vegetable samples ranged from 6.10 to 45.14 percentes.

Original languageEnglish
Title of host publicationResearch for Rural Development 2013
Subtitle of host publicationAnnual 19th International Scientific Conference Proceedings
EditorsS. Treija, S. Skujeniece
Place of PublicationJelgava
PublisherLatvia University of Agriculture
Pages98-103
Number of pages6
Volume1
Publication statusPublished - 2013
Externally publishedYes
Event19th Annual International Scientific Conference on Research for Rural Development - Jelgava, Latvia
Duration: 15 May 201317 May 2013
Conference number: 19

Publication series

NameResearch for Rural Development
Volume1
ISSN (Print)1691-4031

Conference

Conference19th Annual International Scientific Conference on Research for Rural Development
Country/TerritoryLatvia
CityJelgava
Period15/05/1317/05/13

Keywords*

  • Antiradical activity
  • Dried vegetables
  • Flavonoids
  • Polyphenols

Field of Science*

  • 1.6 Biological sciences

Publication Type*

  • 3.1. Articles or chapters in proceedings/scientific books indexed in Web of Science and/or Scopus database

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