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<DIV><FONT size=2 face=Arial>Hello,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>We are trying to create a model of a carbon
nanotube with simple carbon-like chains attached around the entrance and exit of
the nanotube. The problem is we need nrexcl set to 3 in nanotube but wnat
nrexcl=1 in the chains. We have searched the GROMACS manual and user list
extensively and have not found a solution to this issue. </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>We would appreciate any advice on how to handle
such a modeling situation.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks you,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Bill Evans<BR>Postdoctoral Research
Associate<BR>Rensselaer Polytechnic Inst.<BR>Nanotechnology Center MRC
275A<BR>110 8th St.<BR>Troy, NY 12180</FONT></DIV></BODY></HTML>