<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear Prof</div><div><br></div><div>Thank you very much from your response.</div><div>She said me:<br></div><div>"In g_dist, when you select two groups for distance calculation, it
computes the distance between COM's of groups. Now, what is expected for
the distance between the micelle's COM and the COM of (e.g.) head
groups? Clearly, it's near zero ! So you should first calculate the
distance for each group separately and then average over all distances."</div><div><br></div><div>But I didn't understand what was her mean about "you should first calculate the
distance for each group separately and then average over all distances.", because I did g_dist between micelle and for example head group and then used g_analyze for dist.xvg and I had the quantity near zero!!!</div><div><br></div><div>Best Regards</div><div>Dina<br></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Justin A. Lemkul <jalemkul@vt.edu><br> <b><span style="font-weight: bold;">To:</span></b> dina dusti <dinadusti@yahoo.com>; Discussion list for GROMACS users <gmx-users@gromacs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, February 2, 2012 6:07 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [gmx-users] g_dist<br> </font> </div>
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<br><br>dina dusti wrote:<br>> Dear Prof.<br>> <br>> Thank you very much from your response.<br>> Yes, I contacted with one of them and she said me use g_dist, but I have problem with it.<br>> <br><br>Perhaps she could be more specific. Obviously whatever you're doing with g_dist is not working, and I honestly can't think of a way to make g_dist produce anything I would call a "root-mean-square distance."<br><br>-Justin<br><br>> Thank you again because of your patient.<br>> Best Regards<br>> Dina<br>> <br>> ------------------------------------------------------------------------<br>> *From:* Justin A. Lemkul <<a ymailto="mailto:jalemkul@vt.edu" href="mailto:jalemkul@vt.edu">jalemkul@vt.edu</a>><br>> *To:* dina dusti <<a ymailto="mailto:dinadusti@yahoo.com" href="mailto:dinadusti@yahoo.com">dinadusti@yahoo.com</a>>; Discussion list for GROMACS users <<a ymailto="mailto:gmx-users@gromacs.org"
href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a>><br>> *Sent:* Thursday, February 2, 2012 2:42 PM<br>> *Subject:* Re: [gmx-users] g_dist<br>> <br>> <br>> <br>> dina dusti wrote:<br>> > Dear Prof.<br>> ><br>> > Thank you very much from your response.<br>> > OK, I use from g_gyrate for all of radius, but I still don't understand that what thing did they use in their articles for root-mean-square distance because they compared this quantity with quantity of obtained from gyration!!!<br>> ><br>> <br>> It's hard for anyone to speculate about an article that we haven't read. The best course of action is to contact the corresponding author and ask for additional information. Based on what you learn there, you can apply similar analyses.<br>> <br>> -Justin<br>> <br>> > Thank you again.<br>> > Best Regards<br>>
> Dina<br>> ><br>> > ------------------------------------------------------------------------<br>> > *From:* Justin A. Lemkul <<a ymailto="mailto:jalemkul@vt.edu" href="mailto:jalemkul@vt.edu">jalemkul@vt.edu</a> <mailto:<a ymailto="mailto:jalemkul@vt.edu" href="mailto:jalemkul@vt.edu">jalemkul@vt.edu</a>>><br>> > *To:* dina dusti <<a ymailto="mailto:dinadusti@yahoo.com" href="mailto:dinadusti@yahoo.com">dinadusti@yahoo.com</a> <mailto:<a ymailto="mailto:dinadusti@yahoo.com" href="mailto:dinadusti@yahoo.com">dinadusti@yahoo.com</a>>>; Discussion list for GROMACS users <<a ymailto="mailto:gmx-users@gromacs.org" href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a> <mailto:<a ymailto="mailto:gmx-users@gromacs.org" href="mailto:gmx-users@gromacs.org">gmx-users@gromacs.org</a>>><br>> > *Sent:* Thursday, February 2, 2012 12:08 AM<br>> >
*Subject:* Re: [gmx-users] g_dist<br>> ><br>> ><br>> ><br>> > dina dusti wrote:<br>> > > Dear Prof.<br>> > ><br>> > > Thank you very much from your response.<br>> > > He answer me that I should use from g_gyration for radius of micelle, but what should I do for hydrocarbon (dry) core or calculation of inner core of micelle (i.e. the first of carbon on tail of surfactant with COM of micelle)?<br>> > ><br>> ><br>> > Use g_gyrate, with a custom index group that contains the atoms of interest. If you're interested in the radius of the hydrocarbon atoms, make that an index group and perform the analysis on it.<br>> ><br>> > -Justin<br>> ><br>> > -- ========================================<br>> ><br>> >
Justin A. Lemkul<br>> > Ph.D. Candidate<br>> > ICTAS Doctoral Scholar<br>> > MILES-IGERT Trainee<br>> > Department of Biochemistry<br>> > Virginia Tech<br>> > Blacksburg, VA<br>> > jalemkul[at]<a target="_blank" href="http://vt.edu">vt.edu</a> <http://vt.edu> <<a href="http://vt.edu" target="_blank">http://vt.edu</a>> | (540) 231-9080<br>> > http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin<br>> ><br>> > ========================================<br>> ><br>> ><br>> <br>> -- ========================================<br>> <br>> Justin A. Lemkul<br>> Ph.D. Candidate<br>> ICTAS Doctoral Scholar<br>> MILES-IGERT Trainee<br>> Department of Biochemistry<br>> Virginia Tech<br>> Blacksburg, VA<br>> jalemkul[at]vt.edu | (540) 231-9080<br>> <a
href="http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin" target="_blank">http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin</a><br>> <br>> ========================================<br>> <br>> <br><br>-- ========================================<br><br>Justin A. Lemkul<br>Ph.D. Candidate<br>ICTAS Doctoral Scholar<br>MILES-IGERT Trainee<br>Department of Biochemistry<br>Virginia Tech<br>Blacksburg, VA<br>jalemkul[at]vt.edu | (540) 231-9080<br><a href="http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin" target="_blank">http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin</a><br><br>========================================<br><br><br> </div> </div> </div></body></html>