SIGNIFICANT HUMIC ACID MANUSCRIPTS (Photocopies)

Photocopies of some significant humic acid manuscripts in the long history of humic acid research are shown.

1786  Achard, FK

The first report of humic acids

1919  Odén

Coined the term Fulvic acid

1921  Fischer, F & Schrader, H

The first proponents of the lignin origin theory of humic acids

1925  Marcusson, J

A fierce proponent of the polysaccharide origin of humic acids

 

1934  Hilpert, RS & Littman, E

Proponents of the polysaccharide origin of humic acids

1957  Shapiro, J

Used novel techniques for studying humic acids and found an aliphatic structure (work totally ignored)

1972  Nissenbaum, A & Kaplan, IR

Discovered marine humic acids (that were entirely aliphatic)

1986  Ikan et al

Rediscovered the polysaccharide origin of humic acids

Frimmel and Bauer, 1987

Found fulvic acids in plant leaves (origin without microbial alteration)