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acide humique brun

brown humic acid

agriculture, sylviculture et pêche - iate.europa.eu

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Comparisons of soil organic matter and its fractions by pyrolysis mass-spectrometry... Brown humic acid, however, showed stronger signals for nitrogen and sulphur compounds, indicating a higher content of protein-like materials in this fraction....

général - core.ac.uk - PDF: digital.csic.es

Multivariate statistical analysis of mass spectra as a tool for the classification of the main humic substances according to their structural and conformational features... To this end, the mass spectra of humic samples belonging to the main humic fraction types (gray humic acid, brown humic acid, and fulvic acid) were obtained by electrospray ionization mass spectrometry (ESI-MS)....

PDF: core.ac.uk

Complementary multianalytical approach to study the distinctive structural features of the main humic fractions in solution: gray humic acid, brown humic acid, and fulvic acid...references.Previous studies have indicated that the main fractions of humic substances (HS), gray humic acid (GHA), brown humic acid (BHA), and fulvic acid (FA), present different molecular patterns in water solution that are probably associated with specific structural features....

PDF: core.ac.uk