%0 Journal Article
	%A E. Binaeian and  A.M. Rashidi and  H. Attar
	%D 2012
	%J International Journal of Biotechnology and Bioengineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 67, 2012
	%T Toxicity Study of Two Different Synthesized Silver Nanoparticles on Bacteria Vibrio Fischeri
	%U https://publications.waset.org/pdf/11451
	%V 67
	%X A comparative evaluation of acute toxicity of
synthesized nano silvers using two different procedures (biological
and chemical reduction methods) and silver ions on bacteria
Vibrio fischeri was investigated. The bacterial light inhibition test as
a toxicological endpoint was used by applying of a homemade
luminometer. To compare the toxicity effects as a quantitative
parameter, a nominal effective concentrations (EC) of chemicals and
a susceptibility constant (Z-value) of bacteria, after 5 min and 30 min
exposure times, were calculated. After 5 and 30 min contact times,
the EC50 values of two silver nanoparticles and the EC20 values were
about similar. It demonstrates that toxicity of silvers was independent
of their procedure. The EC values of nanoparticles were larger than
those of the silver ions. The susceptibilities(Z- Values) of V.fischeri
(L/mg) to the silver ions were greater than those of the nano silvers.
According to the EC and Z values, the toxicity of silvers decreased in
the following order: Silver ions >> silver nanoparticles from
chemical reduction method ~ silver nanoparticles from biological
method.
	%P 517 - 523