Abstract
The research aimed to prepare the nanoparticles of zinc, vitamin D3 and cysteine with selenium nanoparticles (Se-NPs), and to determine the effect of each of them in inhibiting both the isolated Escherichia coli and Staphylococcus aureus isolated from food by estimating the minimum inhibitory concentration (MIC) and well with Kerbey method. The results showed that the conjugations of zinc, vitamin D3 and cysteine with se-NPs were more effective in bacterial inhibition compared to inhibition of Se-NPs alone. The MIC of Se-NPs alone or in combination with Zn, D3 or Cysteine against both species of bacteria was appeared at 1% and above. The diameter of the inhibition zone to concentrate 25% from nanoparticles against E.coli bacteria was between 26 to 30 mm and against Staph. aureus was appeared between 17 to 22 mm.
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