<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">you can try the GAFF (generalized amber forcefield) provided with all AMBER distributions.<DIV>See Amber documentation for more details how to create a FF for a general molecule.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>cheers,</DIV><DIV>teo<BR><DIV><DIV>On 18 Oct 2007, at 14:04, marc wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">- does anyone know where I can find force-field parameters for these</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">two fluids?</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">- if not, are there "general force-field parameters" published</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">somewhere that can be applied to any kind of substance? Then I could</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">use these... Of course, the simulation then would not be so accurate</FONT></P> </BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>