Ayman Hosamy Abdelhalim <br/><br/>
Extraction and purification of some antibiotics from Bacillus subtilis bacteria and study of its applications /  
 استخلاص وتنقية بعض المضادات الحيوية من بكتيريا باسيلس ساتليس :   ودراسة تطبيقاتها  
Ayman Hosamy Abdelhalim ; Supervised Abdou Osman Abdelhamid , Mahmoud Helmy Eltahan , Ahmed Ibrahim Amin     
 - Cairo :   Ayman Hosamy Abdelhalim ,   2014 
 - 56 P. :   charts , facsimiles ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Biochemistry 
<br/><br/> This study was conducted to producing and separating bacitracin and  Rhamnolipid-Biosurfactant from Bacillus subtilis bacteria , recognize them by  the instrument GC/MS (USA) , evaluate its antibacterial effect in different  concentrations 100% , 80% , 60% , 40% and 20% of bacitracin and  Rhamnolipid-Biosurfactant against E.coli ; Salmonella typhimurium ; Shigella  sonnei ; Listeria monocytogenes and Staphylococcus aureus using disk diffusion  method.  - The results cleared that 50 æl of bacitracin 100% and 80% were most effective  on the growth of Shigella sonnei and Salmonella typhimurium (1.4 cm and 1.3  cm)  
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<br/><br/><label>Subjects--Index Terms: </label>Bacillus subtilis bacteria  Bacitracin  Rhamnolipid-Biosurfactant