title: 13C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands
metadata.name: dc.contributor.author
metadata.value: Abakumov, Evgeniy
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2016-04-02T11:46:55Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2016-04-02T11:46:55Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2015-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: E. Abakumov,E. Lodygin and V. Tomashunas. 13C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands // IHindawi Publishing Corporation International Journal of Ecology Volume 2015, Article ID 390591, 7 pages http://dx.doi.org/10.1155/2015/390591
metadata.lang: en_GB
metadata.name: dc.identifier.issn
metadata.value: 16879716
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/1889
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Humic acids (HAs) and fulvic acids (FAs) of two Polar soils were investigated by 13C NMR and ESR spectroscopies, investigating
  the degree of humification and the molecular structure. One soil, from Bolshoi Lyakhovsky Island, contains two humus horizons:
  modern and buried. The other soil, fromWrangel Island, had only one modern humus horizon.The HAs and FAs of the two soils
  investigated show essential differences.The HAs show fewer oxygen-containing groups in comparison with the FAs, whereas the
  degree of aromaticity is two or three times higher in the HAs. The 13C NMR data also show that HAs are very different from FAs in
  terms of their molecular composition and hydrophobicity. Humification in the Arctic is limited by the very low content of ligninderived
  compounds, due to the restricted vascular flora. As a result, the HAs, isolated from Polar soils, are more similar to the
  corresponding FAs than to the typical HAs of temperate soils. This was confirmed by ESR data, which show similar levels of free
  radical concentration for HAs and FAs and are related to the low level of aromaticity of both materials investigated. Apparently, the
  humification process in the soils of Polar Arctic deserts is in an initial stage.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The work was funded by the Russian President Grant for
  Young Doctors of Science no. MD-3615.2015.4 and Russian
  Foundation for Basic Research, projects nos. 13-04-01693-
  1, 13-04-00070-a. This research was supported by the joint
  Russian-German project CARBOPERM. Scientific research
  was performed at the Center for Magnetic Resonance of
  Research Park of St. Petersburg State University.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en_US
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Hindawi
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: 13-C NMR
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: soils
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Siberia
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: humic acids
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: 13C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: финальная версия.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/1889/1/%d1%84%d0%b8%d0%bd%d0%b0%d0%bb%d1%8c%d0%bd%d0%b0%d1%8f%20%d0%b2%d0%b5%d1%80%d1%81%d0%b8%d1%8f.pdf
resources.format: Adobe PDF
resources.size: 2,47 MB