13C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands
作者: E. AbakumovE. LodyginV. Tomashunas
作者单位: 1Department of Applied Ecology, Saint-Petersburg State University, 16 Line of Vasilyevsky Island, Saint Petersburg 199178, Russia
2Institute of Biology KomiSC UrB RAS, 28 Kommunisticheskaya Street, Syktyvkar, Komi Republic 167982, Russia
3Arctic and Antarctic Research Institute, 38 Beringa Street, Saint-Petersburg 199397, Russia
刊名: International Journal of Ecology, 2015, Vol.2015
来源数据库: Directory of Open Access Journals
DOI: 10.1155/2015/390591
原始语种摘要: 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, from Wrangel 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 lignin-derived compounds, due to the...
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  • ESR 有效发射信号
  • corresponding 对应的
  • initial 开首字母
  • humification 腐殖化
  • oxygen 
  • higher 
  • aromaticity 芳香度
  • modern 现代的
  • hydrophobicity 疏水性
  • horizon