Antimicrobial and antitumor activities of some marine seaweed extracts

Abstract

1- Seaweeds (marine acroalgae) are primitive,phytosynthetic organisms live in sea or in brackish water. They are classified on the basis of their pigment constituents into red algae (Rhodophyceae), brown algae (phaeophycceae) and green algae (chlorophyceae).Red and brown algae are almost exclusively marine, The seaweeds have been utilized mainly as raw material or its extracts that used in the pharmaceutical, cosmetic and food industries .Furthermore, they are used for human and animal nutrition as feed or as fertilizers and soil conditioner.

2- Five species of seaweeds were collected from Rocky Bay of Abu Qir (31º 20' N and 30º

29' E). All samples were brought to laboratory in plastic bags containing sea water to revent evaporation. The collected seaweeds were cleaned, then washed with fresh water to remove surface salts. The collected species are the following: Ulva lactuca, Ulva fasciata, Enteromorpha intestinalis, Jania rubens, and gelidum spinosum.