From chemistry-request@server.ccl.net Mon Sep 24 09:27:57 2001
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Subject: covalent bond lenghts
To: chemistry@ccl.net
From: maria.brandl@pharma.novartis.com
Date: Mon, 24 Sep 2001 15:27:25 +0200
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Dear CCL - folks,

does anybody know where to get comprehensive
tabulated information on standard geometries (bond
lengths, angles) of chemical groups ?

Cheers,

Maria



From chemistry-request@server.ccl.net Mon Sep 24 05:54:25 2001
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From: chem@oxygen.chem.nthu.edu.tw
To: chemistry@ccl.net
Cc: chem@oxygen.chem.nthu.edu.tw
Subject: Re: CCL:undefined fstat for G98
Message-ID: <20010924175423.A25622@OXYGEN.chem.nthu.edu.tw>
References: <20010924050240.B21240@OXYGEN.chem.nthu.edu.tw> <Pine.OSF.4.21.0109241122430.32757-100000@rudjer.irb.hr>
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In-Reply-To: <Pine.OSF.4.21.0109241122430.32757-100000@rudjer.irb.hr>; from dbabic@rudjer.irb.hr on Mon, Sep 24, 2001 at 11:24:02AM +0200


	The opinion from Dr. Doug Fox is correct. fstat is supposed to
reside in /lib/ld-linux.so.2, which is symbolic link to /lib/ld-2.x.x.so. 
For me, the older system (Slackware 7.0) uses glibc-2.1.2, so I can find 
fstat in ld-2.1.2.so using the "nm -s" command. However, for Slackware 8.0
which utilizes glibc-2.2.3, fstat no longer resides in ld-2.2.3.so. The
replacement I suspect in the new shared lib is fstat64, which supports
long file (>2GB). 

	But installing an older share library on the system cannot solve
the problem. It may survive Gaussian 98, but on the contrary it will make
other programs which reference the newer share library fail with undefined 
reference. IMHO, we need some way else to resolve this because I believe
any updated releases of Linux distributions will go for the new glibc.


--
Jen-Shiang Kenny Yu 	//	jsyu@Platinum.chem.nthu.edu.tw

Theoretical Chemistry Lab,
Department of Chemistry,
National Tsing Hua University
Hsinchu 300, TAIWAN



> Hi, Dear Listers,
> 
> Several days ago, I posted a qustion about g98 on Redhat 7.1:
> 
> >   I compile g98 on Redhat 7.1 with pgf77 version 3.1 and get following
> warnings:
> util.so: the use of `tmpnam' is dangerous, better use `mkstemp'
> /home/scratch/test/pgi/linux86/lib/libpgftnrtl.a(cnfg.o): In function
> `__fio_scratch_name':
> cnfg.o(.text+0x33): the use of `tempnam' is dangerous, better use `mkstemp'.
> 
> The compilation finished anyway, but when I ran g98,
> following error appeared:
> 
> g98: error while loading shared libraries: /home/scratch/test/g98/util.so:
> undefined symbol: fstat
> Nothing appeared in output file at all.
> >
> 
>     I received several warm replies from Dr. Doug Fox, Dr. Darko Babic,
> 
> > From Dr. Doug Fox:
> 
>    fstat is a standard system utility and should be resolved out of runtime
> libraries provided with RedHat.  This error suggests RedHat has either
> a) made very substantial changes to the structure of these libraries or
> b) you omitted some of the runtime library packages when you installed
> Linux.
> 
>    This lives in libc on my 6.2 machine so check to see if you have an
> older version of libc you can install.


From chemistry-request@server.ccl.net Mon Sep 24 11:00:51 2001
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Date: Mon, 24 Sep 2001 11:07:02 -0400
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From: Pornthep Sompornpisut <ps2t@virginia.edu>
Subject: Q:Molecular visualization software for Pocket PC
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Dear Colleage,

   Does anyone know if there is any molecular modeling software that can
run on 
Pocket PC or Handheld PDA? 

Thep
=======================================================================
Pornthep  Sompornpisut, Ph.D
Postdoctoral Fellow
Molecular Physiology & Biological Physics Department
School of Medicine
University of Virginia
Tel: 804-924-5473 
Fax: 804-982-1616
Email:ps2t@virginia.edu
=======================================================================



From chemistry-request@server.ccl.net Mon Sep 24 14:54:44 2001
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From: =?iso-8859-1?Q?Mart=EDn?= Lema <mlema@unq.edu.ar>
Subject: Temperature trouble
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Dear CCLs:

In my MD simulations, I start heating up the system using Berendsenīs 
algorithm and when it reaches 300 K I switch to Andersenīs. The thing is 
the average temperature of the system then stabilizes around 294 K.

The system is a myoglobin of 2134 atoms (including hydrogens), implicitly 
solvated using the SASA algorithm and using the CHARMM27 parameter set.

I have tried different collision frequencies for the thermostat, longer 
times, longer cutoffs, etc, but I canīt find the origin of this discrepancy.

Collision values of 0 (which means no application of the thermostat) and 
166 (which means velocity is reassigned for every atom in every step) 
renders the system at 300 K, but it is not the case for more reasonable 
values in the range 0.02 - 5.
The trouble persist when performing the simulation in vacuo or using other 
solvation algorithms.

Does someone figures out where the trouble is? clues are welcome at 
mlema@unq.edu.ar. Useful responses will be summarized.

Martin Lema
National University of Quilmes
Argentina
. 




