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class=843304806-24032004>Calculate volume of your system box. Standard
concentration of Na+& Cl- is around 143 mOsmole/liter. With this
concentration, calculate no. of ions for your water box. Then use command genion
to add those many atoms to your system.</SPAN></FONT></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> gmx-users-admin@gromacs.org
[mailto:gmx-users-admin@gromacs.org]<B>On Behalf Of
</B>Yinghong<BR><B>Sent:</B> Tuesday, March 23, 2004 10:57 PM<BR><B>To:</B>
gmx-users@gromacs.org<BR><B>Subject:</B> [gmx-users] How to calculate the
number of salt ions?<BR><BR></FONT></DIV>
<P>Hi, all:</P>
<P>To make the simulation under a more natural environment, maybe, some NaCl
molecules are needed to add into water solvent.</P>
<P>My question is whether this step is necessary? and how many Na and Cl ion
pairs should be added?</P>
<P>This problem is probably a little silly, but I do wanna know about the
answer!</P>
<P>Your help will be greatly appreciated!</P>
<P> </P>
<P>Regards</P>
<P>Xie YH</P>
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