Obaid, H.H., Tawfeeq, H.K., Khalaf, Z.Z. and Shafeeq, Z.S. 2016. Inhibitory Effect of Rhizomes Methanolic Extracts of Rheum ribes and Tio2 NPs on Escherichia coli. International Journal of Sciences: Basic and Applied Research (IJSBAR). 30, 1 (Oct. 2016), 265–275.