Silver nanoparticles embedded in zeolite membranes: release of silver ions and mechanism of antibacterial action.

ABSTRACT:

Background

The focus of this study is on the antibacterial properties of silver nanoparticles embedded within a zeolite membrane (AgNP-ZM).

Methods and results

These membranes were effective in killing Escherichia coli and were bacteriostatic against methicillin-resistant Staphylococcus aureus. E. coli suspended in Luria Bertani (LB) broth and isolated from physical contact with the membrane were also killed. Elemental analysis indicated slow release of Ag(+) from the AgNP-ZM into the LB broth. The E. coli killing efficiency of AgNP-ZM was found to decrease with repeated use, and this was correlated with decreased release of silver ions with each use of the support. Gene expression microarrays revealed upregulation of several antioxidant genes as well as genes coding for met

SUBMITTER: Nagy A 

PROVIDER: S-EPMC3173047 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature