Macro-and micromorphology of the leaf, stem and root of Heliotropium bacciferum forssk

The macro- and micromorphological characters of the leaf, stem and root of Heliotropium bacciferum Forssk are presented with the aim of finding their diagnostic characters by which the plant can be easily identified either as entire or ground forms

Macro-and micromorphology of the flower and the fruit of Heliotropium bacciferum forsook

The macro- and micromorphological characters of the flower and the fruit of Heliotropium bacciferum Forssk, family Boraginaceae growing wild in Egypt are presented with the view of finding out the diagnostic characters by which they could be identified in the entire and powdered forms

Simple photometric assay of nicotine in tobacco

Simple photometric assay procedure of the volatile tobacco alkaloids as nicotine is presented depending on the preparation of copper dithiocarbamate complex of nicotine after being reduced to a secondary amine derivative using Zn/HCl. The complex is extracted with benzene and measured photometrically at 445 nm. The measured color is stable for more than 48 hours, obeying Beer's law [20-600 ug] and the method is suitable for estimating nicotine in different tobacco preparations