Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by M.A. Metwally
Total Records ( 2 ) for M.A. Metwally
  M.E.H. Osman , M.M. El-Sheekh , M.A. Metwally , A.A. Ismail and M.M. Ismail
  This study was conducted to examine the antifungal activity of some agriculture wastes (rice straw, maize and cotton wastes) against Rhizoctonia solani which is the causal agent of root rot of soybeans. For this target, it is logical start first to test the effects of different agriculture wastes extracts on the growth of R. solani under laboratory conditions, while most of the tested agriculture wastes extracts were exhibited antifungal activities against R. solani on Potato Dextrose Agar medium, so we applied them under greenhouse conditions. Furthermore, we determined the relation between the phenols, polysaccharides and protein content of the tested agriculture wastes and their antifungal activities. The results showed that maize wastes were the most active of all the tested wastes. It could be concluded from the obtained data the use of the tested biotic factors can be fruitful for controlling soybean rot root induced by R. solani.
  M.A. Metwally , H.M. Mubarak , A.M. Gamea and N.A. El Zawawy
  This study reported the inhibition of Aspergillus niger lipase enzyme by Conyza leaf extract which considered an effective tool to prevent fungal invasion into the external ear canal causing otomycosis. Lipase enzyme was extracted from otomycotic A. niger, precipitated by ammonium sulphate and purified by Sephadex G-100 chromatography. The mode of Conyza leaf extract inhibitory action on lipase was detected by preparing both different substrate and Conyza concentrations. The results showed that 30% ammonium sulphate fractionation gave maximum lipase activity 59.2 U mL-1 and the highest lipase activity of Sephadex G-100 chromatography purified sample was found to be 79.1 U mL-1 . The specific activity was 87.9 U mg-1 proteins with purification fold of 8.7. Electrophoretic analysis for the purified enzyme indicated one subunit of molecular weight of 45 kDa. Conyza extract acted as irreversible competitive lipase inhibitor with inhibition constant (kis = 6.2 mg mL-1). The results obtained in the present study suggest that Conyza extract can be used to inhibit A. niger growth that causes otomycosis.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility