الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Acknowledgment
I would like to acknowledge with deep gratitude Prof. Dr.
Mohammed Ramadan Abu-Shady, Professor of Microbiology and the Head
of Microbiology Department, Faculty of Science, A in Shams University,for
suggesting the point, providing the protocol of the work and valuable advice
and for his kind supervision.
I would like to express my deep thanks to Prof. Dr. Mohammed
Ebrahim Roushdy, Professor of Chemistry in Analytical and Evaluation
Department, Petroleum Research Institute for his great, active and continuos
help in the theoretical and practical parts of this work.
I would like also to thank deeply Prof. Dr. Soad Saied Abd El-Aal,
Professor of Microbiology, Microbiology Department, National Center for
Radiation Research and Technology for her direct supervision and support
during the stages of this work.
I wish to thank Dr. Raouf Okasha Aly, Lecturer of Physical
Chemistry, National Center for Radiation Research and Technology for
following actively the work through providing theoretical information and
practical help.
I would like also to thank Dr. Mohamed Saied Sa/amah, Assistant
Professor of Molecular Biology, Entomology Department, Ain Shams
University for his valuable help and Dr. Rinee Ibrahim Abdulla, lecturer in
Petroleum Research Institute for her share in this thesis.
Thanks are also due to my col/egues in the National Center for
Radiation research asnd Technology for their continuous cooperation and
encouragement.
My deep acknowledgment should be directed to the members of
analytical and evaluation department and the members of GC Lab.,
Petroleum Research Institute for their effective cooperation.