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hi,

I'm interested in a mailing list or any similar forum related to the
commercial programm-package SYBYL (by Tripos). Until now I only found 

sybylreq@extreme.chem.rpi.edu

but I wasn't able not find any URL belonging to this list. Does anyone
know if it still active? Maybe someone listening is on it and can give
some information.

Are there any other list associated to sybyl?

Any information welcome!

thanks for your time,
c.

-- 
Christian Rummey, Dipl. Chem.
Institut fuer Organische Chemie, Universitaet Wuerzburg
mailto:rummey@chemie.uni-wuerzburg.de
registered linux user #92917

From chemistry-request@server.ccl.net  Tue Jul 25 10:04:54 2000
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Date: Tue, 25 Jul 2000 10:09:48 -0400
From: Deepak Singh <desingh@syr.edu>
Organization: Birge Group, Dept. Of Chemistry, Syracuse Univ.
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Some days ago I posted the following

---------------------

Other than CCL, is anyone aware of a repository of computational (both
quantum and classical) source code?  These need not be complete
programs, but rather standard algorithms and routines used commonly by
the community.  I have found a few web sites, but none totally
satisfactory.


----------------------------

Here is a summary of the answers  that I got.  My thanks to everyone. 

--------------------------------------------------------------

Hi Deepak,

One of the largest depositories of computational chemistry 
source code remains QCPE at Indiana University.

http://qcpe.chem.indiana.edu/

Good luck, Don

Donald B. Boyd, Ph.D.
Editor, Reviews in Computational Chemistry

--------------------------------------------------------------


The CCP5 group have maintained a repositary of sourcecode for many
years:

http://www.dl.ac.uk/CCP/CCP5/main.html

Hope this is of interest.

Tom Grey

--------------------------------------------------------------


Hello,

for classical MD and MC codes, a nice page is:

http://www.dl.ac.uk/CCP/CCP5/librar.html

Hopefully, this helps!

Best regards

Wibke Sudholt
Institute of Theoretical Chemistry
Heinrich-Heine-University
Duesseldorf, Germany
wibke@theochem.uni-duesseldorf.de


--------------------------------------------------------------

The CCP5 Program library has a lot of code too.

http://www.dl.ac.uk/CCP/CCP5/main.html

Also the Computer Physics Communications library has some
atomistic/quantum codes.

http://www.cpc.cs.qub.ac.uk/cpc/

and finally there's a very good index at

http://www.csc.fi/~laaksone/docs/stuff.html

Keith Refson

--------------------------------------------------------------

The very essence of the internet is that the
repository is dispersed - we don't need centralized
repositories any more, except for hubs to point to
the various locations.

Soaring Bear Ph.D. Research Pharmacologist
Scientific advisor to the health professions
http://soaringbear.com
soaringbear@yahoo.com
--------------------------------------------------------------


Hi Deepak,
"Numerical Recipes" is not only a very good book 
which explains important routines, but has also 
the programs (written in Fortran, C,...) you can 
use as subroutines etc.; 
Regards,
Claudia.

From chemistry-request@server.ccl.net  Tue Jul 25 06:27:49 2000
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Dear Fellow Computational Chemists,
	Here is the summary of replies I got from the list regarding
DFT and Transition State description and a few thoughts for what they
are worth. (I have assumed that everyone is happy for me to post their
contributions, apologies if not).

Tim Dransfield wrote:
I would be really interested in hearing the summary of this one!  I've
been doing DFT calculations on nitrate surfaces for several years, and
B3LYP is far and away the best "bang-for-the-buck" for the stable
species.
I gave up on "pure" DFT for that reason. But, despite being the best of
the "DFT" methods, B3LYP doesn't do all that well at barrier heights.
Indeed, about five years ago it was standard practice to use BHandHLYP
to
calculate barrier heights, using the B3LYP geometries.  That's currently
frowned upon, but I've yet to hear what one is supposed to do instead. 
I
realize that your question is more geared towards the pure methods, but
I'm very interested in what people have to say, all the same.


Jean-Francois Truchon wrote:
I'm a Ph.D. student in the group of Dennis Salahub. In his group,
Emil Proynov has developped XC functionnals including the 
laplacian of the density and a correction for the kinetic
energy. The name of the functionnals are BLAP and PLAP. In my study
cases ( mainly hydrogen bonds ), those functionnals are very good 
( comparable to G2 calculations ). Since I'm not in my office I
don't have some references under my hands, but an article that 
might interest you has been written by Salahub, Chretien, Proynov
about DFT and transition states calculation. I think it will be
easy for you to find it.
(Found it as -
"Performance of density functionals for transition states"
Salahub_DR, Chretien_S, Milet_A, Proynov_E, ABSTRACTS OF PAPERS
OF THE AMERICAN CHEMICAL SOCIETY, 1998,Vol.215, No.Pt1, pp.186-COMP)


Oystein Espelid wrote:
lease send me a summary of you're replies, especially references to
articles who covers this topic would be interesting. Personally it
would surprise me if pure DFT (i.e. not including HF exchange) should
generally perform bad, but certainly I expect one may find examples
were this is the case. I have checked some reaction barriers and found
that B3LYP results compares well with BP86 for organometallic reactions.
Which is in line with the result of this reference:  V.R. Jensen and
K.J. Børve J. Comput. Chem. 19, 917 (1998).


Hans Martin Senn wrote:

I would be interested in a summary of answers on this subject.
As a small contribution, these are the few topical references I have:

[1] R. V. Stanton, K. M. Merz, Jr., "Density functional transition
states of organic and organometallic reactions", J. Chem. Phys. 1994,
100, 434-443.
[2] J. L. Durant, "Evaluation of transition state properties by density
functional theory", Chem. Phys. Lett. 1996, 256, 595-602.
[3] J. L. Durant, "Computational Thermochemistry and Transition States"
in Computational Thermochemistry, K.K. Irikura, D.J. Frurip, Eds., ACS,
Washington, DC, 1998, ACS Symposium Series, Vol. 677, pp. 267-284.


Frank Jensen wrote:
I havn't heard any arguments for why, but it is quite common.
I would be interested if you get any responce on this.
I think it is more a question of parameter fitting, pure
dft gets barriers too low, and HF consistenly gets them too high.
Thus a proper mixture of the two will get barriers in the right
ballpark. And B3LYP has three fitting parameters....


Me:
I dug up a few references, but haven't had time to scour them.
Brako S. Jursic has published many papers (particularly in '98 and '99)
with PE surfaces for a number of reactions calculated at various levels
>from HF up and with pure DFT with many functionals and hybrid DFT.
One example where pure DFT works- Thomas Dargl and Wolfram Koch showed
that pure DFT does OK for Transition states (in this case the
Simmons-Smith reaction) where the barrier height is relatively high
(40-60kJmol^-1). JCS Perkin Trans 2, 877 (1996).
One further thing to consider when using DFT with PE surfaces is 
the inability to include attractive vdW forces which may mean that
a pre-complex state 'before' the transition state may be missed.
On the root causes of this under-estimation of TS energies, I don't
personally believe that it is purely an exchange problem and the reason
that adding exchange to give the hybrid functionals gives better results
is just mixing something in that over-estimates TS energies to 
DFT that under-estimates TS energies - hence a cancellation of errors.
If anyone who didn't reply to the original question has any more
comments
then I would welcome them (and of course people who replied to me
earlier).

Thanks to all who contributed.
	Cheers,
		Dave

-- 
------------------------------------------------------------------------

Dr. David W. Price,       Tel: +44 (0)118 9875123  extn 7415
Department of Chemistry,  Fax: +44 (0)118 9316331
University of Reading,    mailto:d.w.price@reading.ac.uk
Whiteknights, 
READING                http://www.chem.rdg.ac.uk/g50/mmrg/dave/dave.html
RG6 6AD 
U.K.
 
------------------------------------------------------------------------


From chemistry-request@server.ccl.net  Tue Jul 25 03:59:25 2000
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From: Mathias.Norrman@eu.apbiotech.com
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Subject: Calc. of pKa and total charge??
To: chemistry@ccl.net
Date: Tue, 25 Jul 2000 09:59:38 +0100
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Hi,

I would like to calculate pKa of individual residues within a protein in
order to get the total charge as a function of pH. As far as I understand
the pKa is dependent to some extent on the local micro environment. I
wonder if there is a program that calculates pKa of individual residues in
a position specific manner.

With this information I think it´s possible to calculate charges of the
residues and the protein in total as a function of pH.

Perhaps someone knows a program that can do any of this or help me with a
description of how to proceed.

I have DelPhi available but any other program is of interest.

Thanks in advance!

/Mathias Norrman
mathias.a.norrman@apbiotech.com
Amersham Pharmacia Biotech



From chemistry-request@server.ccl.net  Tue Jul 25 03:17:39 2000
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Jens Spanget-Larsen wrote:

>
> In a recent, most interesting publication ('Seeing molecular orbitals',
> Chem.Phys.Letters 321, 78-82 [2000]) scanning tunneling microscopy is used to
> observe the shapes of single molecular orbitals of the fullerene C60:
>
>   "..the scanning tunneling microscope (STM) is probing a single molecular
>   orbital (MO)."
>
> Any comments?
>
> Yours, Jens >--<
>

Hi,

this paper just shows that the symmetry of the calculated HOMO for a distorted C60
molecule resembles the symmetry of the total electron density measured by an STM
experiment. Is there anything new?

I do not know why people in any case  want to see artifacts of a particularly
theory, which is based on the independent particle model.


Jörg

--
Jörg Grunenberg, Org. Chemie, Hagenring 30, 38106 Braunschweig
email: Joerg.Grunenberg@tu-bs.de phone: +49 531 391 5252
URL: http://www.tu-bs.de/institute/org-chem/grunenberg/grunenberg.html




From chemistry-request@server.ccl.net  Tue Jul 25 04:06:13 2000
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Subject: Calc. of pKa and total charge??
To: chemistry@ccl.net
Date: Tue, 25 Jul 2000 10:06:30 +0100
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*** (Sorry for sending a second copy of this but this one has a correction
of my email adress.) ***

Hi,

I would like to calculate pKa of individual residues within a protein in
order to get the total charge as a function of pH. As far as I understand
the pKa is dependent to some extent on the local micro environment. I
wonder if there is a program that calculates pKa of individual residues in
a position specific manner.

With this information I think it´s possible to calculate charges of the
residues and the protein in total as a function of pH.

Perhaps someone knows a program that can do any of this or help me with a
description of how to proceed.

I have DelPhi available but any other program is of interest.

Thanks in advance!

/Mathias Norrman
mathias.a.norrman@eu.apbiotech.com
Amersham Pharmacia Biotech



From chemistry-request@server.ccl.net  Tue Jul 25 04:31:06 2000
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From: "SeungBum Suh" <sbsuh@chem.postech.ac.kr>
To: <chemistry@ccl.net>
Subject: How to buy METECC-84
Date: Tue, 25 Jul 2000 17:28:09 +0900
Message-ID: <CMEEJDFBKFGPNKKIDBALKEIKCCAA.sbsuh@chem.postech.ac.kr>
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Dear CCLers,
I want to buy Metecc or motecc program.
But I cannot contact to clementi.
The pakage I want to buy is Water MD program with NCC potential.
Thanks in advance.


From chemistry-request@server.ccl.net  Tue Jul 25 12:00:51 2000
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Date: Tue, 25 Jul 2000 12:00:36 -0400 (EDT)
From: PSC Workshop <workshop@psc.edu>
To: chemistry@ccl.net
Subject: Supercomputing workshop free to Pennsylvania researchers and students
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			Pittsburgh Supercomputing Center
                   Parallel Processing on CRAY MPP Systems 



PSC will offer two workshops to students and researchers associated with
Pennsylvania academic institutions. The workshop is designed for people
who have an interest in applying high performance computing to their
teaching or research or who are simply interested in knowing more about
parallel computing. 

Location: PSC in Mellon Institute	Location: Drexel University
Date: September 6 - 8, 2000		Date: September 12-13, 2000
Application deadline: Sep 1, 2000 	Application deadline: Sep 3, 2000.

PURPOSE:

The purpose of this workshop is to introduce participants to parallel
processing on the CRAY T3E and to explore more advanced topics, including
message passing, performance monitoring and optimization techniques. 

To ensure quality training, our workshops incorporate both lectures and
extensive hands-on lab sessions. Programming exercises are carefully
designed to reinforce concepts and techniques taught in class. Our
instructors have strong scientific and technical backgrounds and are
available for individual consultation during lab sessions. 

     A working knowledge of FORTRAN or C and UNIX is required. 
     Parallel computing experience is not necessary. 

AGENDA and LECTURE NOTES:

The workshop agenda and lecture notes can be found online. 

REGISTRATION:

Registration fees are waived to students, professors or researchers
associated with academic institutions in the state of Pennsylvania. 

Please complete the online registration form before the deadline at
http://www.psc.edu/training/registration_form.html 

You may also apply for this workshop by sending the requested information
via electronic mail to workshop@psc.edu, via fax to (412/268-5832), or via
conventional mail to:

     Workshop Application Committee
     ATTN: Tom Maiden
     Pittsburgh Supercomputing Center
     4400 Fifth Avenue
     Pittsburgh, PA 15213.
 

Early applicants of the workshop located at PSC will be notified of
acceptance during the week of August 28, 2000. 

All those applying to the workshop at Drexel will be notified during the
week of September 4, 2000. 

For additional online information, please visit
http://www.psc.edu/general/education/Lecture_List.html
or contact the workshop coordinator at
workshop@psc.edu. 

HOUSING and TRAVEL:

Housing and travel are the responsibility of participants. 





From chemistry-request@server.ccl.net  Tue Jul 25 14:30:02 2000
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	Tue, 25 Jul 2000 14:30:01 -0400 (EDT)
From: "Gavin Shear" <gavin@acdlabs.com>
To: <Mathias.Norrman@eu.apbiotech.com>, <chemistry@ccl.net>
Subject: RE: Calc. of pKa and total charge??
Date: Tue, 25 Jul 2000 14:31:47 -0400
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In-Reply-To: <OF9C0FB198.0C107798-ON41256927.0031BC1E@se.apbiotech.com>

Dear Mathias,

You may be interested in ACD/pKa predictions, which will calculate
pKa in one of three selected modes.

The “apparent constant” of the pKa is a method of calculation which
mimics the experimental situation by “adding” protons to the molecule
in the order the molecule would normally be protonated in solution.

The “microconstants of current form” is a method of calculation which
accepts the input structure exactly as it is, and tries to remove a
proton from it.

The "single pKa" is a method intuitive to the way medicinal chemists view
pKa values.  If there are two acidic sites in the molecule, a chemist
desires to know the relative acid pKa values.  It could be done by
calculating the pKa for each ionization site while the rest of the
molecule is considered neutral.  This is not what actually happens
experimentally, if a di-acid is dissolved in strong base and titrated
with acid, but it does indicate the relative ease of ionization at each
center.

If you would like to trial these methods, please visit our online
interactive laboratory, www.acdlabs.com/ilab , or you may email
me a structure, and I can do a prediction for you.  You may also
contact one of our representatives at sales@acdlabs.com .

You may use our freeware ChemSketch 4.5 interface to connect
to the interactive lab, by downloading at www.acdlabs.com/download ,
or simply use the JAVA structure drawing applet at the ILAB web
site.

Best wishes,
Gavin Shear

-----Original Message-----
From: Computational Chemistry List [mailto:chemistry-request@ccl.net]On
Behalf Of Mathias.Norrman@eu.apbiotech.com
Sent: Tuesday, July 25, 2000 5:07 AM
To: chemistry@ccl.net
Subject: CCL:Calc. of pKa and total charge??



*** (Sorry for sending a second copy of this but this one has a correction
of my email adress.) ***

Hi,

I would like to calculate pKa of individual residues within a protein in
order to get the total charge as a function of pH. As far as I understand
the pKa is dependent to some extent on the local micro environment. I
wonder if there is a program that calculates pKa of individual residues in
a position specific manner.

With this information I think it´s possible to calculate charges of the
residues and the protein in total as a function of pH.

Perhaps someone knows a program that can do any of this or help me with a
description of how to proceed.

I have DelPhi available but any other program is of interest.

Thanks in advance!

/Mathias Norrman
mathias.a.norrman@eu.apbiotech.com
Amersham Pharmacia Biotech



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From chemistry-request@server.ccl.net  Tue Jul 25 16:34:43 2000
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Date: Wed, 26 Jul 2000 04:29:42 +0800
From: Lawrence Tsang <s985522@mailserv.cuhk.edu.hk>
Organization: AUC
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To: chemistry@ccl.net
Subject: Can't use autodock 3.0"5" with redhat 6.0 english.
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Hello,
I've followed the work from autodock 's home page
to install autodock 3.05 on redhat 6.0,
however, when running autodock3,
every time after the move command it will
cause segmentation fault and quit.
May I ask did anybody sucessfully installed 3.0"5"
in redhat 6.0?

Thank you.
Best wishes,
Lawrence Tsang.

bchlawrence@cuhk.edu.hk


