THE classification of humic substances, which are the main component of organic material in soils and sediments, is based on colour and behaviour in solvents. Humic acids are defined, according to the ...

An acid found in rich humus soil breaks down the misfolded brain proteins — called prions — that cause chronic wasting disease. When concentrations of humic acid similar to those found in soils were ...

The elemental composition and spectroscopic properties of dissolved fulvic acids isolated from different sampling media (topsoil, ground and surface water) of a natural fen area (high portion of ...