Extraction of tamarind seed jellose under different conditions and their rheological properties

Abstract

Tamarind seed powder (TSP) was prepared from tamarind seed and further defatted with hexane. Non-defatted and defatted TSP samples were analyzed for pasting property using a Brabender viscoamylograph. Slightly lower of pasting temperature and significantly higher in PV, consistency index, and setback of defatted TSP was observed. Rheological property, especially flow behavior index, of high temperature extracted jellose (HT jellose) was described the samples as non-newtonian pseudoplastic type, and with higher consistency index than of room temperature extracted jellose (RT jellose). Precipitation with ethanol at pH 3, 4, and 5 of both extraction temperature group samples showed non-significant on consistency index in each group. However, HT jellose with precipitation at pH 4 resulted in highest viscous jellose.