Our aqueous tannins are unique blends of ellagitannin and gallotannin
that are entirely oak-derived and retain all of the aromatic freshness and potency of the stave quality oak while maximizing ease of application.
1,2,3,4,6-Penta-O-galloyl-[beta]-D-glucose (PGG) is a polyphenol and water-soluble gallotannin
isolated from the Chinese herb Rhus chinensis .
Determination of GalloTannin
content in fermented Rice bran by HPLC Sample Preparation
The major commercial application of this enzyme is in the hydrolysis of gallotannin
to gallic acid, which is an intermediate required for the synthesis of an antifolic antibacterial drug trimethoprim (Sitting et al.
, one of tea's components is thought to be up to 1000 times more effective than existing medicines in the treatment of brain damage in stroke patients.
Given recent concerns about the purity of tannic acid as a standard in tannin analysis (Hagerman and Butler 1991), we used bulk purified oak tannin as the standard for gallotannin
and proanthocyanidin analyses.
The two new products, Aquadolce and Aquatexture, are based on a blend of ellagitannin and gallotannin
compounds that the supplier says retain the "aromatic freshness and potency" of wood.
content was calculated by subtraction of the results of non-hydrolyzed from hydrolyzed samples.
In soil studies at the Delaware Biotechnology Institute, a premier center for life sciences research at UD, the scientists discovered that invasive Phragmites produces elevated levels of a benign compound, a precursor of gallic acid known as gallotannin
, relative to its native cousin.
Schultz, unpublished data), we used bulk-purified oak and maple tannin as standards for gallotannin
and proanthocyanidi n analyses.
The product is a mix of ellagitannin derived from stave wood and gallotannin
from oak gall and is intended to provide a rich sweetness to the flavor and aroma of white or red wines.
13]C NMR and mass spectral analysis and based on the spectral data it was identified as a well-known gallotannin
compound 1,2,3,4,6 penta-0-galloy1-[beta]-D-glucose and based on the in vitro findings the PGG was further evaluated for ex vivo 11[beta]-HSD-1 inhibition activity and against HFD-induced diabetes in C57BL/6 mice.