Institution: | * Centro de Investigaciones en Química de los Productos Naturales, Facultad de Humanidades y Educación, Universidad del Zulia, Maracaibo, Venezuela ? Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas 1010, Venezuela |
Abstract: | An analytical study has been made of six gum specimens from Albizia lebbeck, Leguminosae. Galactose, mannose, arabinose, glucuronic acid and its 4-O- -metyl analogue are present in all the specimens studied. Rhamnose was not detected according to sugar analysis and spectral data. The absence of this sugar, the high acidity and the relatively low limit viscosity number contrast with the values reported previously for one African sample of A. lebbeck. The lead content is much higher than that recorded for other Albizia gums. 13C-NMR spectrum of this gum, in deuterium oxide, shows good resolution. |