Crude extract from common bean seed as well all ultrafiltration
fractions have shown differences in behavior when they were
evaluated for turbidity removal regarding pH and dosages at which
they expressed the highest obtained coagulation activities as well
as the values of this highest activities. These differences might be
explained by differences in kind and characteristics of biomolecules
as well as by their content in fraction and crude extract. Proteins
as well as other extracted molecules separated by ultrafiltration
differ not only in molecular weight but e.g. in pI which may additionally
affect coagulation as consequence of their charge at certain
pH. However, it can be noticed that the higher efficiencies in turbidity
removal generally were obtained at higher investigated pH
values and that pH 9 was the least appropriate for common bean
seed molecules to express their coagulation action.