Mohamed E Zayed

Mohamed E Zayed

King Saud University, Saudi Arabia

Title: Screening for production of biosurfactants from (PAH) biodegrading marine bacteria


Dr.Zayed has completed his PhD at the age of 35 years from Al Azhar University after getting a scholarship from Washington University from October 1992 to July 1994 through channel program to complete the practicle part of his PhD thesis and then work in teaching many different microbiology courses and supervising many M.Sc.and PhD theses in Al Azhar University and other Universites in Yemen, Libya, and Saudia Arbia. He is the Co PI and PI of a research group in King Saude University. He has published more than 25 papers in reputed journals in enviromental bacteriology and natural and synthetic antimicrobial and anticancer compounds.


Biosurfactants are important agents in the effective uptake of PAHs by bacteria and fungi. Biosurfactants are found as extracellular compounds or localized on the cell surface ofmicroorganisms. For the latter case, the microbial cell itself is a biosurfactant and adheres to hydrocarbon. Those biosurfactants are capable of increasing the bioavailability of poorly soluble polycyclic aromatic hydrocarbons such as phenanthrene and resins . Therefore, the use of biosurfactants should be a promising means to emulsify the polluted oils prior to biodegradation. Many microorganisms, especially bacteria, produce biosurfactants when grownon water-immiscible substrates. Biosurfactants are more effective,selective, environmentally friendly, and stable than many syntheticsurfactants. This study interested with production of biosurfactantsfrom PAH degrading marine bacteria previously isolated from polluted Egyptian soil.