Publication Name: Romanian Journal of Physics. The data indicated high lead levels due to the influence of urban and industrial effluents. Technology and Biological Sciences. You're using an out-of-date version of Internet Explorer. Here, we base our species on both geographical and Effeciency of Egyptian plant extracts Taxonomic revision of genus Hordeum L. It is restricted to the southeastern corner of Egypt Gebel Elba region and being unique in possessing solitary spathe and long attenuate leaf base. Preliminary phytochemical screening of the plant Thymus capitatus exhibited the presence of saponins, resins, flavonoids, essential and fixed oils.