الفهرس 
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Abstract
Natural products for some Egyptian plants belong to Umbilliferae family showed a broad biological value. It has been considered one of the important subjects in the scientific research.
In this research, Biochemical studies have been perform anced on fresh cultivated seeds for cumin, fennel-flower and coriander. Four loosen seed extracts were prepared using organic solvents; ethyl alcohol, acetone, chloroform and n-hexane.
The results showed that the ethanolic extract amount was high comparing to acetone, chloroform and n-hexane extracts. On the other hand, the cumin ethanolic extract was higher than the fennel-flower and coriander ethanolic extracts, as follows; 7.0, 3.1 and 2.5 % respectively.
The bioeffect value was tested for the three plant extracts (12 extracts) as antimicrobial against five harmful microbial strains. Three strains are gram-positive (Staphylococcus sp., Pachysolen tannopisilvs andPichnia pint DSV 7038) and two strains are gram-negative bacteria (Pseudonwnas phaseolieala and XalltlwmonGs phaseoli X 13).