The potential of jackfruit starch for use as suspending agent and emulsifying agent

Due to the physicochemical properties of jackfruit (JK) seed starch, it is interesting to use jackfruit mucilage for cosmetic application. The aim of this study was to investigate the physical properties and the effectiveness of JK mucilage at the range of 1 to 5% w/v for using as suspending agent and emulsifying agent. It was found that the pH of 3% w/v JK mucilage was 4.63±0.11. At the concentrations lower than 3% w/v the mucilage exhibited newtonian flow whereas at higher concentration the mucilage showed pseudoplastic with thixotropic flow. As increased the concentration of JK mucilage, the surface tension of purified water was reduced to the range of 1.77-3.8 mN/m and the interfacial tension between water and mineral oil was reduced to the range of 9.07-12.43 mN/m. The viscosity of the mucilage was reduced dramatically in acid pH but in salt solution at the concentrations lower than 2% w/v, the viscosity was increased. In addition, the JK mucilage was able to flocculate Titanium dioxide. Even though the JK mucilage was able to thicken the external phase of emulsion, it exhibited as a poor emulsifier. The JK mucilage, therefore, has the potential for use as a suspending agent and thickening agent in cosmetic products

Pharmaceutical Sciences), Assoc. Prof. 2 B.Sc.(Biotechnology) 3 B.Sc.(Chemistry)

A spectrophotometric method for determination of total lactones in Andrographis paniculata was established by using dinitrobenzoic acid and potassium hydroxide solutions as colour forming agents. The absorbance of the solution was determined at 536 nm. The linearity range was 12-72 × × × × × 10 -6 g.ml -1 . The detection limit was 1.2 µ µ µ µ µg, the quantitation limit was 4.23 µ µ µ µ µg. The intraday variation had an average of slope 6082.97 g.m