A study of the growth curves of C. xerosis and E. coli Bacteria in Mediums Containing Cobalt Ferrite Nanoparticles

Abstract

Previous publications demonstrated the sensibility of the bacteria, when these were reproduced in mediums that contain nanoparticles of luminescent silicon. The mentioned effect takes place in the development of a bacteriological sensor. The present investigation is centered on the study of the growth curves of E. coli and C. xerosis, but now in the presence of nanosize particles of Cobalt Ferrite (CoFe2O4) which were produced by the co-precipitation method in a watery phase. These nanoparticles present ferromagnetism characteristics (coercivity at room temperature among 600-5000 Oe for a size around 15-40nm). The experiment results evidence that the adaptation period of the bacteria, in contact with a stable suspension of nanoparticles of Ferrite, shows a growth curve of above the one obtained in absence of the nanoparticles (standard curve). The probable interaction of the electric polarity that these possess should be involved with the observed phenomena.

A Review: Ldpe-Biodegradation Using Microbial Consortium by the Incorporation of Super Paramagnetic Iron Oxide Nanoparticle (Spion) as the Enhancer for Biodegradation

“…These nanoparticles exhibit magnetic properties that might interact with the electric polarity of the bacteria and influence its growth [8].…”

“…There are varied nanoparticles that enhance growth cycle, mechanical and physiochemical stability along with biodegradability. The cobalt-ferrite nanoparticles have reported to enhance the growth of Escherichia coli and Corynebacteriumxerosis [8].Nanometric silicon particles have also reported that it alter the growth profiles of bacteria [9]. Several inorganic nanoparticles, including silica, silica/iron oxide, and gold have been shown to exhibit no negative influence on the growth and activity of E. coli [10].…”

“…Among a variety of ferrite based nanostructures, recently SPION have broad applications in several fields including permanent magnets, magnetic fluids, magnetic drug delivery, microwave devices and high-density information storage. These nanoparticles exhibit magnetic properties that might to interact with the electric polarity of the bacteria and influence its growth [8]. The consortium was documented to degrade synthetic polymers like epoxy and epoxy silicone blends.…”

Biodegradation of LDPE with Mixed Consortium in presence of Super Paramagnetic Iron Oxide Nanoparticle (SPION) as the Enhancer for Biodegradation by Accelerating Growth Profiling of Microbes

“…Nanoparticle cobalt-ferrite have reported to enhance the growth of Escherichia coli and Corynebacterium xerosis (Flores et al, 2004). Nanometric silicon particles have also reported that it accelerate the growth profiles of bacteria (Pérez et al, 2002).…”

“…Among a variety of ferrite based Nano-forms, recently SPION have broad applications in several fields including magnetic fluids, magnetic drug delivery, microwave devices and high-density information storage. These SPION exhibit magnetic properties that might to interact with the electric polarity of the bacteria and influence its growth (Flores et al, 2004). …”