Tamarind seed coats, extractions

Luengthanaphol, S., Mongkholkhajornsilp, D., Douglas, S., Douglas, P.L., Pengsopa, L.l. and Pongamphai, S. (2004) Extraction of antioxidants from sweet Thai tamarind seed coat—preliminary experiments. Journal of Food Engineering 63(3), 247-252. 

The antioxidative activity of tamarind seed was also investigated by Osawa et al. (1994), cited in (5). They found that ethanol and ethyl acetate extracts prepared from the seed coat exhibited antioxidative activity. This suggests that tamarind seed coats, a by-product of the tamarind gum industry, may have potential as a low cost source of antioxidants 18), but we note that so many plants and plant extracts show antioxidative activity (Ramos et al, 2003, cited in... 

SC-C02 extraction of tamarind seed coats was investigated for the extraction of antioxidative components by Tsuda et al. (43). In another study,... 

Tamarind has tartaric acid as its major organic acid component. Many polyphenols are found in the coat of the tamarind fruit. Tamarind kernel powder (TKP) has a xyloglucan, which has a variety of uses. TKP, a crude extract of tamarind seeds, has been used as a replacement for... 

Tamarind seed eonsists of the seed coat or testa (20-30%) and the kernel or endosperm (70-75%) (Coronel, 1991 and Shankarachaiya, 1998, both cited in (5)). Tamarind seed is a typical underatilized material (77). Commercially, tamarind seed is a by-product of the commercial utihzation of the fruit pulp and has been reported to have several uses (5, 17). Tamarind seeds can be used for extracting tamarind gum, whereas the seed coats, a by-product of manufacturing tamarind gum, were found as a source of natural antioxidants 18). The seeds are presently gaining importance as an alternative source of proteins (5). 

---