From surjit@chemistry.iitd.ernet.in  Tue Jul 15 00:07:11 1997
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Date: Tue, 15 Jul 1997 09:18:51 +0530 (IST)
From: Surjit Dixit <surjit@chemistry.iitd.ernet.in>
Subject: Re: CCL:AMBER and contiuum solvent models
To: Jeffrey.Nauss@UC.Edu
Cc: chemistry@www.ccl.net
In-Reply-To: <9707141134.ZM12124@beryllium.crs.uc.edu>
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> 
> Have contiuum solvent models been implemented in AMBER for MD simulations?  If
> so, is the code available?
> 

Yes, it has been done. 

Fritsch, V., and E. Westhof. 1991. Three-center hydrogen bonds in DNA: 
molecular dynamics of poly(dA).poly(dT). J. Am. Chem. Soc. 113:8271-8277.

But that was AMBER3.  

Best regards,
Surjit.

____________________________
Surjit B.Dixit
PhD Candidate                        Telephone:+91 11 666979 Extn.:7602
Chemistry Department,                Facsimile:+91 11 6862037
Indian Institute of Technology,      Email : surjit@chemistry.iitd.ernet.in
Hauz Khas,                                   surjit@netearth.iitd.ernet.in
New Delhi 110016,
India.


From ccl@www.ccl.net  Sun Jul 13 20:06:57 1997
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Date: Sun, 13 Jul 1997 19:38:31 -0400
From: jle@world.std.com (Joe M Leonard)
Message-Id: <199707132338.AA23677@world.std.com>
To: chemistry@ccl.net
Subject: re: What languages will be here tomorrow...




Alex Turner <A.J.Turner@bath.ac.uk) writes:

There seems to be one points that no-one has covered, especially when we
say FORTRAN has run its coarse.  If I am to spend a long time writing a
piece of code to perform a very complex task - I need to be 100% sure
that the code will be in a lagnuage that can be used in the future.  There
is only one language that can really offer that - FORTRAN.

---

Considering the amount of C code written in the last, oh, 5 years
(both commercial and non-commercial), I think C will be with us
for the forseeable future as well.  I suspect in the computational
chemistry arena, there has been (far?) more C code written over this
time than Fortran...

This doesn't mean that there are more lines of C out there in use
than Fortran, merely that times actually have changed a little, or
maybe more than a little.  Having written a fair amount of code in
both languages, I would hate to write anything BUT numerically-
intensive code in Fortran anymore.  Trying to do I/O, or interact
with the environment, etc. seems so much easier in C...

Also, while I cannot say for certain, there seems to be some platforms
for which a Fortran compiler is either unavailable or a relative newcommer.
C, however, seems available wherever one cares to look (although my
experience with supercomputers is not up to date).  While Fortran, on
the strength of some pre-preprocessors, might still hold a lead in
generating "fast" code, sections of "C-tran" seem to optimize as well
if some thought is given to "helping" the compiler.

Something called "Fortran" will be around for a while.  So will something
called "C"...  Neither language is probably the best-choice when
developer effort is the concern, but both seem rather good for heavy
lifting.  It's just that given the annoyances of multi-language software,
there has to be SIGNIFICANT performance issues to get me to mix in
Fortran anymore.

Joe Leonard
jle@world.std.com

P.S. FWIW, I live in the workstation environment, usually working on
code which is either heavy-lifting or personal/throwaway...


From V.Gillet@sheffield.ac.uk  Mon Jul 14 06:07:01 1997
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Date: Mon, 14 Jul 1997 09:17:52 +0100 (BST)
From: Val Gillet <V.Gillet@sheffield.ac.uk>
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To: chemistry@www.ccl.net
Subject: Call for papers
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CALL FOR PAPERS: COMPUTATIONAL APPROACHES TO THE DESIGN AND ANALYSIS
OF COMBINATORIAL LIBRARIES 

The Molecular Graphics and Modelling Society and the Chemical
Structure Association are organising a joint conference on the
computational analysis of molecular diversity, to be held in
Sheffield, UK 14-16 April 1998.  Contributions are now sought in areas
such as: the design of diverse and focussed libraries; algorithms and
methods for the selection of database subsets; the representation and
searching of combinatorial libraries and analogous virtual databases;
the design and use of both in-house and commercial software for
diversity analysis; diversity indices; compararison of property-based
and fingerprint-based (dis)similarity measures; and the integration of
diversity analysis with other computational tools, such as docking and
QSAR.  

People wishing to present their work should submit a 500-word abstract
(preferably by email) to Dr V.J. Gillet, Department of Information
Studies, University of Sheffield, Sheffield S10 2TN, UK (tel.
044-114-2222652, fax 044-1142780300, email v.gillet@sheffield.ac.uk)
by 1st October 1997.










From MAILER-DAEMON@www.ccl.net  Mon Jul 14 09:07:12 1997
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From: "Wolf-Dietrich Ihlenfeldt" <wdi@eros.ccc.uni-erlangen.de>
Message-Id: <9707141458.ZM20@eros.ccc.uni-erlangen.de>
Date: Mon, 14 Jul 1997 14:58:21 -0600
In-Reply-To: Wang Jiansuo <wjs@csb0.IPC.PKU.EDU.CN>
        "CCL:Where is software on interconversion of chemical structure systems based on WLN???" (Jul 14, 16:52)
References: <Pine.SGI.3.91.970714162627.11925A-100000@csb0.IPC.PKU.EDU.CN>
Reply-To: wdi@eros.ccc.uni-erlangen.de
X-Phones: +49-9131-85-6579
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To: Wang Jiansuo <wjs@csb0.ipc.pku.edu.cn>
Subject: Re: CCL:Where is software on interconversion of chemical structure systems based on WLN???
Cc: chemistry@www.ccl.net
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On Jul 14, 16:52, Wang Jiansuo wrote:
> Subject: CCL:Where is software on interconversion of chemical structure sy
> Dear netter,
>   Wiswesser Line Notation(WLN) is a widely-used method of chemical

I HOPE NOT! This kind of notation is an abomination. Are there
any software packages around which stil use this represenation?
This format was designed at a time when storage space was
extremely expensive. It produces very compact
representations, at the cost of ridiculously convoluted
and self-contradicting encoding rules. If you
need to use a line notation, you should employ
the widely supported SMILES system.
If, however, you have some legacy database, you have
my deepest sympathy and a lot of work to do.


> structure presentation.I am looking for programs that interconve between
> WLN and Connection Table or other structure presentation systems.Any
> information of yours is appreciated.
>   Thanks in advance.
> Your sincerely,
>

>-- End of excerpt from Wang Jiansuo



-- 
Dr. Wolf-D. Ihlenfeldt
Computer Chemistry Center, University of Erlangen-Nuernberg
Naegelsbachstrasse 25, D-91052 Erlangen (Germany)
Tel (+49)-(0)9131-85-6579  Fax (+49)-(0)9131-85-6566
---
The three proven methods for ultimate success and fame:
1) Nakanu nara koroshite shimae hototogisu
2) Nakanu nara nakasete miseyou hototogisu
3) Nakanu nara naku made matou hototogisu


From jkl@ccl.net  Mon Jul 14 23:07:14 1997
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From: Jan Labanowski <jkl@ccl.net>
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Date: Mon, 14 Jul 1997 22:11:38 -0400 (EDT)
Message-Id: <199707150211.WAA00587@krakow.ccl.net>
To: chemistry@www.ccl.net
Subject: xvibs.c now works with dummies in ACES2
Cc: jkl@ccl.net




Dear vacationers and vacationists...

The xvibs.c (a program to extract vibrational modes from output files
of Aces2, Gamess, and  Gaussian is revisited...

Thanks to Eric V. Patterson <patter@pollux.chem.umn.edu> and
Bradley Smith <basmith@pollux.chem.umn.edu> the serious features (some
call them bugs) of xvibs.c acting on ACES2 output were uncovered.
I did not check the thing for dummy atoms and symmetry.
And I should have had...

Now, this seems to be fixed, so grab the new version of xvibs.c
>from ftp:/www.ccl.net/pub/chemistry/software/SOURCES/C/xvibc
and report new unknown features which I just introduced {:-)}.

Yours,

Jan Labanowski
jkl@ccl.net


From dsmith@CTCnet.Net  Mon Jul 14 23:07:20 1997
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Date: Mon, 14 Jul 1997 22:12:26 -0400
To: jtgolab@amoco.com (Joe Golab)
From: "Douglas A. Smith  Ph.D." <dsmith@CTCnet.Net>
Subject: Re: CCL:Reaction Pathway Program
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Joe:

I am not familiar with any program that will suggest ALL reaction
pathways... there are just way too many possibilities, which is why we
still have synthetic organic chemists.  

You are probably familiar with Bill Jorgensen's CAMEO program (I hope I
have the name correct), which can suggest 'reasonable' synthetic routes to
various types of compounds and functionality.  There is also a commercial
program (not that Bill doesn't sell his programs, ;)) called SYNTREE (I
believe).  There were some papers about this at either the last ACS
National meeting in San Francisco or at the Midland, MI, ACS Regional
meeting in May.  I can look for more information if you wish, but I am at
home and just finishing up a vacation while I write this.

Regardless, both of these programs use a combination (I believe) of data
bases and "expert" algorithms to select likely reactions.  I don't know of
anything that will give you all possible routes, except perhaps an
aggressive undergraduate who has just finished his/her organic final exam.

There was also SYNLIB that came from the late Dan Chodosh... I don't know
if anyone picked up that program so I can't tell you if it still exists.
This was purely data base based and matched based on user-defined
descriptors, if I remember correctly from my postdoc days.  MDL REACCS and
CAS's reaction data base are two others that come to mind.

I would also love to hear from anyone else about similar programs.  Please
post to CCL rather than just to Joe.

Doug Smith

At 04:43 PM 7/14/97 -0500, you wrote:
>Dear CCL Member:
>
>Do you know of any (engineering, chemistry, biological, etc) program that
>given a compound would suggest any and all reaction pathways toward that
>compound (no matter how outlandish from a thermodyanmic standpoint)?
>
>For example, given tolune, the program would suggest:
>
> 1) benzene + methane -> toluene
> 2) methylcyclohexane -> toluene + H2
> 3) methane + heat/pressure -> toluene + H2
> 4) ETC.
>
>Perhaps this is really a database that is part of a program.  Any leads
>would be gratefully appreciated!  Thanks.
>
>-- 
>
>:Joe
> jtgolab@amoco.com
> (630) 961-7878  <SOCON 231 7878>
>
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