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Three new ursane-type triterpenes, glutinosalactone A–C (1–3), were isolated from the 50% aqueous acetone extract of the leaves of Rehmannia glutinosa. Their structures were elucidated on the basis of spectral analysis (IR, NMR and MS spectroscopy). The cytotoxic effects of compounds 1–3 against three human cancer cell lines (MCF-7, MG63 and HepG2) were also evaluated. Compound 3 showed cytotoxic...
Palmprint recognition uses the principal lines of the palm skins to recognition applications. Compared with the face images, palm images have a high reliability and stability. Furthermore, the palm images are robust to the variation of the facial expression, post and illumination. The Non Subsampled Contourlet Transform has characteristics of good multiresolution, shift-invariance and high directionality...
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