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Mycotoxins are secondary metabolites produced by fungi. Their presence often provokes a serious risk to human and animal
health. The most important source for incorporation is related to contaminated food. In addition, natural polyphenolic
antioxidants are organic compounds widely distributed in an important variety of food and its importance becomes increasingly
relevant given its benefits to human health. Moreover, the presence of estrogenic compounds is recognized as important in
estrogenic cycles of women and females of the animal kingdom. Thus progressively a greater significance is given by the analytical
methods available for the determination of analytes previously mentioned in real samples linked to actual food processing and
animal health systems. The development of biosensors has emerged as an important alternative for such purpose, particularly
since the methodologies involved in their use are generally simple, low cost, high sensitivity, fast, etc. The author?s research team
has developed amperometric biosensors and immunoelectrodes for the determination of ochratoxin A (OTA) and citrinin (CIT)
mycotoxins (from Aspergillus and Penicillium genus), polyphenolic antioxidants and progesterone and β-estradiol hormones.
The development of electrochemical immunosensors incorporated in a micro fluidic cell for quantification of the mycotoxins
CIT in rice samples and OTA in red wines, and the hormones progesterone and β-estradiol in bovine serum by square wave
voltammetry on carbon screen-printed electrodes as electrochemical transduction element is described. Besides, amperometric
biosensors based on peroxidases were developed to determine the total polyphenolic content in wine and tea samples, CIT in rice
and OTA in red wine samples.
Hector Fernandez has received his Ph.D. in the Universidad Nacional de R?o Cuarto (UNRC), Argentina (1974?1978) and was a postdoctoral
research associate with Robert Osteryoung at the University of New York at Buffalo, USA. Currently, he is working as a Full Professor at the UNRC.
He was Dean of the Facultad de Ciencias Exactas (UNRC, 1992-1999). He has authored more than seventy research articles and book chapters and
has been the editor of a book. He is a member of the National Council of Scientific and Technological Research (CONICET, Argentina) as a Principal
Researcher. He is an AAQA, AAIFQ and SIBAE fellow and he has been honoured as President of Asociaci?n Argentina de Qu?micos Anal?ticos
(AAQA, 2007-2009) and representative of AAQA in the Red Iberoamericana de Qu?mica Anal?tica (RIQA, 2010-2011).
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