Browsing ELibrary by Subject "HUMIC ACIDS"

Browsing ELibrary by Subject "HUMIC ACIDS"

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  • CAUSES OF COLOUR AND FLUORESCENCE IN SPELEOTHEMS 
    van Beynen P.; Bourbonniere R.; Ford D.; Schwarcz H. (2001)
    Speleothems fluoresce, when illuminated with UV light, between 410 and 460 nm. In this study, we attempted to determine the nature of the fluorophores, thought to be either trace elements or organic matter trapped in the ...
  • EXPERIMENTAL STUDY OF HUMIC ACID ADSORPTION ONTO BACTERIA AND AL-OXIDE MINERAL SURFACES 
    Fein J.B.; Boily J.F.; Guclu K.; Kaulbach E. (1999)
    Humic acid adsorption onto bacterial and mineral surfaces was measured as a function of pH and humic:surface ratio. The bacterial species used was the aerobic gram-positive species Bacillus subtilis, and Al mineral surface ...
  • STRUCTURALLY BOUND LIPIDS IN PEAT HUMIC ACIDS 
    Lehtonen K.; Hanninen K.; Ketola M. (2001)
    Humic acids from highly decomposed peat were subjected to oxidation with alkaline cupric oxide (CuO) at 170°C (single oxidation). Oxidation products were isolated as three fractions, oxidized humic acids, fulvic acids and ...