| Abstract: | Interaction between humic substances from a Pampasic pond and carbohydrates was studied. Determinations were performed by
gel chromatography using radiolabeled glucose. The results showed that upon lowering the pH the interaction decreases in relation
to the steric arrangement that causes the diminution of the accessibility of the available sites. Results of displacement
experiments carried out by addition of unlabeled glucose, galactose, saccharose and starch, confirmed that the interaction
occurs mainly through labile non specific bonds and is, to a certain degree, independent of the carbohydrate molecular weight
involved.
This revised version was published online in July 2006 with corrections to the Cover Date. |
