Open AccessEffects of Fe/SDS and Au nanoparticles on P. aeruginosa bacterial growth and biosurfactant production
Author(s) -
Alamdar Neda,
Rasekh Behnam,
Yazdian Fatemeh
Publication year - 2018
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 38
eISSN - 1751-875X
pISSN - 1751-8741
DOI - 10.1049/iet-nbt.2016.0260
Subject(s) - nanoparticle , bacterial growth , chemistry , bacteria , colloidal gold , surface tension , nuclear chemistry , microbiology and biotechnology , nanotechnology , materials science , biology , physics , quantum mechanics , genetics
The aim of this study was to evaluate the effects of iron (Fe)/SDS and gold (Au) nanoparticles on growth and biosurfactant production of Pseudomonas aeruginosa PBCC5 . The concentrations of the nanoparticles used were 1, 500 and 1000 mg/l. In this research, the surface tension of biosurfactant, dry weight of biosurfactant and biomass, emulsification indexes (E 24 ) were measured and transmission electron microscopy analysis was used to monitor the nanoparticles. The test results showed that the effect of nanoparticles on the bacterial growth and biosurfactant production varied corresponding to the type and concentration of nanoparticles. Fe/SDS nanoparticles showed no bacterial toxicity when the concentration of nanoparticles was 1 mg/ml and increased the growth and biosurfactant production, 23.21 and 20.73%, respectively. While at higher concentrations (500, 1000 mg/l), the nanoparticles suppressed bacterial growth as well as biosurfactant production. Similarly, Au nanoparticles had no bacterial toxicity and also increased bacterial growth and biosurfactant production . The surface tensions of all samples decreased from 72 of distiled water to 32–35 mN/m.