The antifouling efficiency of a paint containing zinc "tannate
," WW rosin (water white variety commonly used in antifouling paints), and styrene acrylate copolymer (SAC) as the binders proved effective for a period up to 3 months in natural sea water (NSW).
The antidiarrheal activity of the extract may also be due to denature of proteins by tannates
that make intestinal mucosa more resistant and reduce secretion .
Eggs, soya, bran, phytates, phosphates, tannates
, oxalates, carbonates and other iron chelators reduce absorption of dietary iron.
The colloidal gold solution was centrifuged (single cycle) at 15000 RPM for 45 minutes to remove excess ions, which include sodium, citrate, and tannates
, and the gold nanoparticles were concentrated by dissolving them in 10 mM of citrate buffer at pH 4.0 (the volume of the buffer solution was 4 times less than the volume of the original centrifuged solution).
Tannins and tannic acids also denature proteins forming tannates
which decrease the intestinal mucosa permeability.