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

Published online by Cambridge University Press:  15 March 2011

Marjorie Flores ,
Nanell Colón ,
Omayra Rivera ,
Nicole Villalba ,
Yahira Baez ,
David Quispitupa ,
Javier Avalos  and
Oscar Perales
Marjorie Flores
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Nanell Colón
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Omayra Rivera
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Nicole Villalba
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Yahira Baez
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
David Quispitupa
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Javier Avalos
Affiliation:
Department of Science and Technology, Universidad Metropolitana, San Juan, PR 00928-1150
Oscar Perales
Affiliation:
Department of General Engineering-Materials Science and Engineering, University of Puerto Rico, Mayaguez, P.R, Puerto Rico
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 820: Symposia O/R – Nanoengineered Assemblies and Advanced Micro/Nanosystems , 2004 , O8.17
Copyright
Copyright © Materials Research Society 2004

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References

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