title: Biosynthesis of selenium nanoparticles using Klebsiella pneumoniae and their recovery by a simple sterilization process.
abstract: The use of biologically derived metal nanoparticles for various proposes is going to be an issue of considerable importance; thus, appropriate methods should be developed and tested for the biological synthesis and recovery of these nanoparticles from bacterial cells. In this research study, a strain of Klebsiella pneumoniae was tested for its ability to synthesize elemental selenium nanoparticles from selenium chloride. A broth of Klebsiella pneumoniae culture containing selenium nanoparticles was subjected to sterilization at 121(o)C and 17 psi for 20 minutes. Released selenium nanoparticles ranged in size from 100 to 550 nm, with an average size of 245 nm. Our study also showed that no chemical changes occurred in selenium nanoparticles during the wet heat sterilization process. Therefore, the wet heat sterilization process can be used successfully to recover elemental selenium from bacterial cells.
authors.affiliation: Department of Pharmaceutical Biotechnology and Pharmaceutical Sciences Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences , P.O.Box:14155/6451, Tehran , Iran ; Sciences and Research Center, Azad University , Tehran , Iran.
authors.forename: Parisa Jafari
authors.initials: PJ
authors.lastname: Fesharaki
authors.forename: Pardis
authors.initials: P
authors.lastname: Nazari
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Shakibaie
authors.forename: Sassan
authors.initials: S
authors.lastname: Rezaie
authors.forename: Maryam
authors.initials: M
authors.lastname: Banoee
authors.forename: Mohammad
authors.initials: M
authors.lastname: Abdollahi
authors.forename: Ahmad Reza
authors.initials: AR
authors.lastname: Shahverdi
keywords: Klebsiella pneumoniae; recovery; selenium nanoparticles; sterilization; synthesis
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