<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2180" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><FONT size=3><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR">Seminarios
del Dpto. de Química Inorgánica, Analítica y Química Física /
INQUIMAE</SPAN></STRONG><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><FONT size=3><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR">FCEyN -
Universidad de Buenos Aires</SPAN></STRONG><SPAN
style="FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR"><A
href="http://www.qi.fcen.uba.ar/es"><FONT
size=3>http://www.qi.fcen.uba.ar/es</FONT></A></SPAN></STRONG><SPAN
style="FONT-FAMILY: Arial"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN style="FONT-FAMILY: Arial"><FONT
size=3> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><FONT size=3><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR">1er.
Cuatrimestre, 2006</SPAN></STRONG><SPAN
style="FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN style="FONT-FAMILY: Arial"><FONT
size=3> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN style="FONT-FAMILY: Arial"><FONT
size=3> <o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR"><FONT
size=3>Lunes 8 de mayo, 13.00h</FONT></SPAN></STRONG><B><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR"><BR><STRONG><SPAN
style="FONT-FAMILY: Arial"><FONT size=3>Aula Seminarios, DQIAyQF-
INQUIMAE<o:p></o:p></FONT></SPAN></STRONG></SPAN></B></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><STRONG><SPAN lang=ES-AR
style="COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR"><FONT
size=3>Ciudad Universitaria, Pab. II, Piso 3</FONT></SPAN></STRONG><SPAN
lang=ES-AR
style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: Arial; mso-ansi-language: ES-AR">
</SPAN><SPAN style="FONT-FAMILY: Arial"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN style="FONT-FAMILY: Arial"><o:p><FONT
size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN style="FONT-FAMILY: Arial"><o:p><FONT
size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN lang=FR
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: FR">Dominique
Langevin<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN lang=FR style="mso-ansi-language: FR"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN lang=FR
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: FR">Laboratoire
de Physique des Solides<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-outline-level: 2"
align=center><SPAN lang=FR
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: FR">Université
Paris Sud, Orsay, France<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN lang=EN-GB style="mso-ansi-language: EN-GB"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN lang=EN-GB style="mso-ansi-language: EN-GB"><BR></SPAN><SPAN
lang=EN-GB
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: EN-GB">Polyelectrolyte/surfactant
aggregates. Influence of the polymer backbone rigidity<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><SPAN lang=EN-GB
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center"
align=center><FONT size=3><SPAN lang=FR
style="FONT-FAMILY: Arial; mso-ansi-language: FR">Siwar Trabelsi, Daragh
McLoughlin, Samuel Guillot, <U>Dominique Langevin</U>*</SPAN><SPAN lang=FR
style="FONT-SIZE: 14pt; FONT-FAMILY: Arial; mso-ansi-language: FR"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify"><SPAN
lang=FR style="mso-ansi-language: FR"><BR></SPAN><SPAN lang=FR
style="FONT-FAMILY: Arial; mso-ansi-language: FR"><BR></SPAN><SPAN lang=EN-GB
style="FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><FONT size=3>Studies of
aqueous solutions of polyelectrolytes and surfactants of opposite charges will
be presented. Various techniques have been used: specific electrodes, scattering
of light, X-ray and neutrons, electrophoretic mobility. We will show results
obtained with cationic surfactants and anionic polyelectrolytes of different
backbone rigidity, including DNA. In some cases, we find well defined
aggregates, with a size controlled by the surfactant concentration. These
aggregates possess an internal structure, similar to that of the liquid
crystalline phases obtained in the precipitated phases obtained at higher
surfactant concentrations.<o:p></o:p></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none"
align=center><SPAN lang=EN-GB
style="FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><o:p><FONT
size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none"
align=center><SPAN lang=EN-GB
style="FONT-FAMILY: Arial; mso-ansi-language: EN-GB"><o:p><FONT
size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: none; mso-layout-grid-align: none"
align=center><SPAN
style="FONT-FAMILY: 'ITC Zapf Dingbats'; mso-bidi-font-family: Arial"><FONT
size=3>hhhhh</FONT></SPAN><SPAN lang=EN-GB
style="FONT-FAMILY: 'ITC Zapf Dingbats'; mso-ansi-language: EN-GB; mso-bidi-font-family: Arial"><o:p></o:p></SPAN></P></FONT></DIV></BODY></HTML>