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Articles by Ashraf Mohabati Mobarez
Total Records ( 2 ) for Ashraf Mohabati Mobarez
  Ali Sharifat Salmani , Seyed Davar Siadat , Dariush Norouzian , Hojat Ahmadi , Mehdi Nejati , Bahman Tabaraie , Seyed Mohammad Ataybi , Mehrangize Zngeneh , Ashraf Mohabati Mobarez , Reza Shapour , Mohammad Hassan Hedayati , Mehdi Abbasi and Maryam Karbasian
  Brucella abortus S99 Lipopolysaccharide (LPS) extracted and purified by phenol and butanol methods after submerged culture in the fermentor and then the optimization of these two methods carried-out by some modifications to increase the yield of extraction and LPS content and also to decrease the protein and nucleic acid content of extracted samples. Extracted samples chemically characterized by LPS and Ketodeoxyoctanate (KDO) content measurement and the evaluation of protein and nucleic acid contamination. LPS and KDO content of optimized phenol extracted sample have been more than other extracted samples (146 EU mL 1 and 1.8%, respectively) and protein contamination of this sample has been less than the sample extracted by phenol (Westphal and Jann) method (2 versus 2.7%). Optimization of butanol method led to higher content of LPS and KDO in comparison with butanol (Morrison and Leive) method. Finally among four evaluated extraction methods (butanol, phenol, optimized butanol and optimized phenol), the optimized phenol extraction of Brucella abortus S99 lipopolysaccharide reported as the best method for industrial purposes (e.g. antigen production for diagnosis of brucellosis) based on chemical characterization of extracted samples.
  Ashraf Mohabati Mobarez , Reza Hosseini Doust , Zuhair Mohamad Hassan and Saminea Kamali
  The antimutagenic activity of Lactobacillus bulgaricus and acidophilus to potent mutagen, 2-nitrofluorene was examined by the modified Ames test using Salmonella typhimurium TA100. The results showed that the supernatants, heat killed cells and viable cells of Lactobacilli, preincubated with mutagenic factor such as 2-nitrofluorene, displayed characteristic antimutagenic activities. L. bulgaricus and L. acidophilus cells showed 98 and 64% antimutagenic activity against 2-nitrofluorene, respectively. Antimutagenic activities of Lactobacilli were higher than their supernatants. All the strains, heated for 15 min at 100°C, antimutagenic activities were reduced by 36-47%.
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