In summary, TSH was confirmed to contain a very large
amount of polymeric PA (about 39%, w/w). Therefore,
TSH is one of the best natural resources for polymeric PA
production. Crude TSE with a very high content (about
94%, w/w) was simply and efficiently prepared by a one
pot extraction using aqueous ethanol. This method will be
very useful for manufacturing the polymeric PA products.
The polymeric tannins of TSH were confirmed as
polymeric PA (condensed tannin), which did not contain
galloylated derivatives with a higher content of PD in the
B ring than GSE. The average DP of acTSE was shown.
However, the detailed chemical structure of the polymeric
tannins from TSH should be elucidated by further studies
by gel permeation chromatography and phloroglucinol or
thiolysis reaction to confirm the constituent units and
interflavonoid linkage. The potent antioxidant activity of
the polymeric PA of TSE was also shown.
In summary, TSH was confirmed to contain a very largeamount of polymeric PA (about 39%, w/w). Therefore,TSH is one of the best natural resources for polymeric PAproduction. Crude TSE with a very high content (about94%, w/w) was simply and efficiently prepared by a onepot extraction using aqueous ethanol. This method will bevery useful for manufacturing the polymeric PA products.The polymeric tannins of TSH were confirmed aspolymeric PA (condensed tannin), which did not containgalloylated derivatives with a higher content of PD in theB ring than GSE. The average DP of acTSE was shown.However, the detailed chemical structure of the polymerictannins from TSH should be elucidated by further studiesby gel permeation chromatography and phloroglucinol orthiolysis reaction to confirm the constituent units andinterflavonoid linkage. The potent antioxidant activity ofthe polymeric PA of TSE was also shown.
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