Role of paramagnetic polyconjugated clusters in lignin antioxidant activity (in vitro)

T. Dizhbite, J. Ponomarenko, A. Andersone, G. Dobele, M. Lauberts, J. Krasilnikova, N. Mironova-Ulmane, G. Telysheva

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

7 Citations (Scopus)
1 Downloads (Pure)


Using physico-chemical methods (EPR, SEC, Py-GC/MS and UV/VIS spectroscopy) and wet chemical analysis, the characteristics of 6 hardwood lignins in terms of functionality, molecular weight and composition of lignin substructures were determined and considered together with the results of DPPH•, ABTS •+ and O2•- antioxidant assays with the aim to understand the relationships governing antioxidant properties of lignin. The strong positive linear correlation between lignin antioxidant capacity in the three assays used and the extent of conjugation of paramagnetic polyconjugated clusters in lignin macromolecules was found. The biological activity of the most active alkaline lignins was assessed by in vitro experiment with human blood.

Original languageEnglish
Title of host publicationInternational Conference "Functional Materials and Nanotechnologies" (FM&NT-2012)
Subtitle of host publicationConference Proceedings
Publication statusPublished - 2012
EventInternational Conference "Functional Materials and Nanotechnologies" (FM&NT-2012) - Institute of Solid State Physics, University of Latvia, Riga, Latvia
Duration: 17 Apr 201220 Apr 2012

Publication series

NameIOP Conference Series: Materials Science and Engineering
PublisherIOP Publishing Ltd.
ISSN (Print)1757-8981


ConferenceInternational Conference "Functional Materials and Nanotechnologies" (FM&NT-2012)
Abbreviated titleFM&NT-2012
OtherInternational Conference on Functional Materials and Nanotechnologies
Internet address

Field of Science*

  • 2.5 Materials engineering

Publication Type*

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


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