Hassan, R., Erian, N., Yousof, A., Zayed, B. (2012). ANTIMICROBIAL EFFECT OF SOME PLANT SEEDS EXTRACTS. Journal of Food and Dairy Sciences, 3(8), 461-472. doi: 10.21608/jfds.2012.77736
R. A. Hassan; N. S. Erian; A. M. Yousof; B. A. Zayed. "ANTIMICROBIAL EFFECT OF SOME PLANT SEEDS EXTRACTS". Journal of Food and Dairy Sciences, 3, 8, 2012, 461-472. doi: 10.21608/jfds.2012.77736
Hassan, R., Erian, N., Yousof, A., Zayed, B. (2012). 'ANTIMICROBIAL EFFECT OF SOME PLANT SEEDS EXTRACTS', Journal of Food and Dairy Sciences, 3(8), pp. 461-472. doi: 10.21608/jfds.2012.77736
Hassan, R., Erian, N., Yousof, A., Zayed, B. ANTIMICROBIAL EFFECT OF SOME PLANT SEEDS EXTRACTS. Journal of Food and Dairy Sciences, 2012; 3(8): 461-472. doi: 10.21608/jfds.2012.77736
Agric. Chem. Dept., Fac. Agric., Mansoura University , Mansoura, Egypt
Abstract
A large number of plants have therapeutic potentials. Of these plants black cumin, Nigella sativa L. ( Ranunculaceae); onion, AlliumcepaL. ( Alliaceae ) and leek , AlliumporrumL. (Alliaceae ) were examined in this investigation in form of methanolic and aqueous extracts. Two different concentrations were prepared and examined for each plant extract. Eight microoraganisms were examined in this investigation. Two strains of Gram positive bacteria(G+) , Bacillussubtilis and Micrococcusluteus ; two strains of Gram negative bacteria(G-), Salmonellatyphi and Eschrichiacoli ; two strains of yeasts, Candidalipolytica and Saccharomycescerevisae and two fungal strains, Aspergillusniger and Penicilliumnatatum. Results of chemical analyses proved that all methanolic extracts of three examined plants contained terpenes, flavonoids, saponins and alkaloids except the methanolic extract of black cumin contained tannins . Furthermore, the extracts of the tested plants seeds were found to contain some minerals such as Zn,Fe,Mn,Na,K,Ca,Mg and P. Results of microbiological examination exhibited that methanolic extracts either in 0.05% or in 0.1% was more effective than the aqueous extract for all the tested microbial strains.