Andrographolide, neoandrographolide and 14-deoxy-11,12-didehydroandrographolide, ent-labdene diterpenes isolated from Andrographis paniculata showed viricidal activity against herpes simplex virus 1 (HSV-1). None of these compounds exhibited significant cytotoxicity at viricidal concentrations.

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LiSn 2 P 3 O 12 with sodium (Na) super ionic conductor (NASICON)-type rhombohedral structure was successfully obtained at low sintering temperature, 600°C via citric acid-assisted sol-gel method. However, when the sintering temperature increased to 650°C, triclinic structure coexisted with the rhombohedral structure as confirmed by X-ray diffraction analysis. Conductivity-temperature dependence of all samples were studied using impedance spectroscopy in the temperature range 30 to 500°C, and bulk, grain boundary and total conductivity increased as the temperature increased. The highest bulk conductivity found was 3.64×10 −5 S/cm at 500°C for LiSn 2 P 3 O 12 sample sintered at 650°C, and the lowest bulk activation energy at low temperature was 0.008 eV, showing that sintering temperature affect the conductivity value. The voltage stability window for LiSn 2 P 3 O 12 sample sintered at 600°C at ambient temperature was up to 4.4 V. These results indicated the suitability of the LiSn 2 P 3 O 12 to be exploiting further for potential applications as solid electrolytes in electrochemical devices.

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