<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Graciela Gonzalez</b> <span dir="ltr"><<a href="mailto:ggra26@yahoo.com.ar">ggra26@yahoo.com.ar</a>></span><br>
Date: 2012/4/10<br>Subject: Lunes 16 de abril 13 .00 hs - Seminario DQIAQF/INQUIMAE<br>To: Andrea Peralta <<a href="mailto:andrea@qi.fcen.uba.ar">andrea@qi.fcen.uba.ar</a>><br><br><br><div><div style="font-size:12pt;font-family:arial,helvetica,sans-serif">
<div>Ahora si va completo!!! empecemos a difundirlo, gracias!!!</div><div>Gra<br></div><div><br></div><div>Seminarios DQIAQF - INQUIMAE, Lunes 16 de abril - 13 hs.<br><br>Aula de Seminarios INQUIMAE - DQIAQF<br>Facultad de Ciencias Exactas y Naturales<br>
Ciudad Universitaria - Pab. 2 - Piso 3</div><div> </div>
<div class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:14.0pt;font-family:Calibri" lang="EN-IE">Integrating enzymes, microbes and electrodes: from
biosensors to biopower</span></b></div>
<div class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:14.0pt;font-family:Calibri" lang="EN-IE"> </span></b></div>
<div class="MsoNormal" style="text-align:center" align="center"><span style="font-family:Calibri" lang="EN-IE">Paul Kavanagh </span></div>
<div class="MsoNormal" style="text-align:center" align="center"><span style="font-family:Calibri" lang="EN-IE"> </span></div>
<div class="MsoNormal" style="text-align:center" align="center"><span lang="EN-IE"><span> </span></span><i><span style="font-family:Calibri" lang="EN-IE">School</span></i><i><span style="font-family:Calibri" lang="EN-IE"> of Chemistry,
National University of Ireland, Galway,
Ireland</span></i></div>
<div class="MsoNormal" style="text-align:center" align="center"><span style="font-family:Calibri" lang="EN-IE"><a href="mailto:Paul.kavanagh@nuigalway.ie" target="_blank">Paul.kavanagh@nuigalway.ie</a></span></div>
<div class="MsoNormal" style="text-align:center" align="center"><i><span style="font-family:Calibri" lang="EN-IE"><span> </span></span></i></div>
<div class="MsoNormal" style="text-align:justify"><span style="font-family:Calibri" lang="EN-IE">Mediated enzyme reactions
form the basis of many applications, ranging from biosensors, through biofuel
cells, to applications in industrial electrolysis. This presentation will
briefly review some of our efforts to date on redox mediation of enzyme
reactions for such applications. Our studies on laccase biosensors
demonstrated, also, that laccases co-immobilized in redox hydrogels can reduce
oxygen at relatively high potentials and current densities, suggesting possible
applications as cathodes in biofuel cells when combined to oxidation of a fuel,
such as glucose, at the anode. Covalent coupling of enzymes and mediators on
electrode surfaces, particularly structured surfaces, can appreciably improve
the fuel cell stability and output. Also, improvements in the design of the
redox polymers (in terms of structure and redox potential) help to increase the
biofuel cell power output. Our approach at improving the stability and the
power output of the biofuel cell will be presented.</span></div>
<div class="MsoNormal" style="text-align:justify"><span style="font-family:Calibri" lang="EN-IE"> </span></div>
<div class="MsoNormal" style="text-align:justify"><span style="font-family:Calibri" lang="EN-IE">Similarly, biofilms of
electro-active bacteria in microbial fuel cells (MFCs) can facilitate
proficient organic carbon removal from wastewater while producing biological
renewable energy in the form of electricity. Our research examines cyclic
voltammetric behaviour of EAB under various growth conditions to assess the
efficiency of such films in MFCs. The approach adopted examines the role of an
applied controlled-potential to enhancing biofilm electrochemical catalytic
activity compared with the behavior of control biofilms using both single-culture
studies (<i>Geobacter sulfurreducens,
Rhodoferax ferrireducens</i>) and mixed-culture studies on model fuel/wastes,
and on wastes sourced from municipal and slaughterhouse waste-streams, as well
as fuels derived from second-generation biofuel crops.</span></div>
</div></div></div><br>