期刊
ENZYME AND MICROBIAL TECHNOLOGY
卷 52, 期 3, 页码 151-156出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2012.12.006
关键词
K. pneumoniae; Simulated microgravity; Silver nanoparticles; Bactericidal activity
资金
- National Research Foundation of Korea (NRF) grant [1101000369]
- Korea government
- Chonbuk National University
Silver nanoparticles were synthesized by biological method using cultural filtrate of Klebsiella pneumoniae cultured under simulated microgravity and silver nitrate solution as precursor. The nanoparticles exhibited typical plasmon absorption maximum of silver nanoparticles between 405 and 407 nm. Spherical silver nanoparticles were found to have size between 15 and 37 nm by TEM analysis. XRD pattern corresponding to planes (1 1 1), (2 0 0), (2 2 0) (3 1 1) revealed the crystalline nature of the biosynthesized silver nanoparticles. FTIR spectrum proposed stabilization of silver nanoparticles by the protein molecules present in the cultural filtrate. The silver nanoparticles exhibited high bactericidal activity against Salmonella enterica, Escherichia coli and moderate bactericidal activity against Streptococcus pyogenes. (c) 2012 Elsevier Inc. All rights reserved.
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