HDTenEightyP/NetNews huggingface dataset:
From: phaedrus@alioth.cc.nps.navy.mil (Matthew Koebbe)
Newsgroups: sci.chem
Subject: High Pressure Liquid Chromatography
Date: 27 Jan 93 00:12:54 GMT
Distribution: usa
Organization: Naval Postgraduate School


Greetings:

I'm trying to to find out what is available in the way of software which runs 
a High Pressure Liquid Chromatograph.  I've tried archie, but to no avail.
This request is on the behalf of friends of mine and I believe they want to
work from a Macintosh platform.  I further understand that they are looking
for analysis software as well as a device controller.

As usual, freeware is preferred, but I(we)'d be interested in hearing user 
reviews of purchasable software as well.

			Many thanks!

			    matthew

P.S.  I'm a math/computer/engineering kinda guy myself, so technical questions 
      will be answered after I get a chance to question my friends!
-- 
---------------------------------------------------------------------------
Matthew Koebbe              (408)656-2571 | I don't find this stuff amusing
Scientific Visualization Group, NPS       |  anymore.
internet: phaedrus@alcor.cc.nps.navy.mil  |                -- Paul Simon
Newsgroups: sci.chem
From: mroussel@alchemy.chem.utoronto.ca (Marc Roussel)
Subject: Re: Dining Escapades.
Organization: Department of Chemistry, University of Toronto
Date: Mon, 25 Jan 1993 03:11:58 GMT

In article <1993Jan24.143157.24608@magnus.acs.ohio-state.edu>
aflorjan@magnus.acs.ohio-state.edu (Alan S Florjancic) writes:
>The fizzle you see in soda when salt is added is merely the evolution of the 
>CO2 in the pop(carbonation) when salt is dissolved in the solution.  Salt is
>much more soluable than the carbon dioxide and the pop can only dissolve so 
>much
>material, so the less soluable thing comes out of solution...

     We debated this one here a little while ago and decided that this
was not the right answer.  The correct answer is that the solid salt nucleates
(catalyzes) bubble formation as I pointed out in another posting.  Here
is the evidence in favour of nucleation and against the decreased
solubility hypothesis:

	  1. It works with dense insoluble solids like sand, too.  This
	     argument is probably the most persuasive.
          2. Decarbonation is already spontaneous so there
	     is no need for an explanation in which the CO_2 is
	     displaced by something else.
          3. Ionic strength only has a weak effect on solubility, at
	     least for reasonable ionic strengths and ordinary solutes.
	     Witness the Debye-Huckel equation.  (Common ion effects are
	     a different matter, but in this case there is no common
	     ion.)
          4. The effect starts and is done before any significant amount
	     of salt has dissolved.  Combined with point 3, this is
	     also persuasive.

				Marc R. Roussel
                                mroussel@alchemy.chem.utoronto.ca
From: jones@cs.sfu.ca (John Jones)
Newsgroups: sci.chem
Subject: Published values of bond energies
Date: 27 Jan 93 19:02:13 GMT
Distribution: sci.chem
Organization: CSS, Simon Fraser University, Burnaby, B.C., Canada

I've been checking the values given for the energies of some common
chemical bonds in various textbooks, and have been surprised to find wide
variations in the values given.  For example, take the C-C, C=C and C[triple bond]C energies; I found the following values (in kJ/mol)

                              single              double       triple

Chemistry for                  347                 599          829
Science & Engineering,
Beck, Brown


Elements of Material           370                 680         890
Science and Engineering
van Vlack


Inorganic Chemistry           335                607          837
J.E. Huheey


CRC Handbook                   368                720          962



What is the cause of these discrepancies?  Suppose I actually needed to know the bond energies for some practical purpose, how would I come up with a reliable
figure?

John Jones
Newsgroups: sci.chem
From: chancy@bank.ecn.purdue.edu (Venkatraman Chandrasekaran)
Subject: Re: XRAY diffraction of C60 CRISTAL
Keywords: Laue and powder diffraction
Organization: Purdue University Engineering Computer Network
Date: Sat, 23 Jan 1993 23:38:41 GMT

In article <1993Jan21.173950.7622@reed.edu> nuke@reed.edu (Bill Newcomb) writes:
>laurent@cenerg.cma.f writes:
>>Some studies have been carried out on X ray characterization
>>of C60 cristal:
>
>>1 - What does an X ray diffraction spectrum of C60 cristal
>>look like ?
>
>A bunch of dots, I'm sure. Almost all diffraction patterns do (well,
>powder patters look like a bunch of circles, but I assume you mean single
>crystal)....

I presume you are talking about a Laue or a Debye-Scherrer pattern. Although
these techniques are useful (Laue, most significantly for identifying crystal
facets), they have been supeseded by diffractometers in the recent times. The
advantage being the intensity of the diffracted beam is measured directly, as
opposed to measuring through the blcakening of a photographic film. One can use
both a powder diffractometer (most simple to use, if large single crystals are
not available easily) or a single crystal diffractometer (slightly more
involved) for crystal structure determination. The diffraction patterns are
plots of the measured intensity versus twice the Bragg angle.

>>2 - Because caracteristic dimension of the cristal grid is 
>>about 10 nm why using X ray ? Wouldn't it be better 
>>to use greater wave length ?
>
>You might use 10nm light if you only wanted to know how the speres were
>packed. With x-rays, you stand a good chance of being able to tell where
>individual atoms are, thus gaining a great deal of information. 
>

Well said.

>Bill Newcomb
>
>--
>~/.oo

Cheers

- chandra
chancy@bank.ecn.purdued.edu


Newsgroups: sci.chem
From: anders@mentor.cc.purdue.edu (Anders Lund)
Subject: Re: CAS-online
Organization: Purdue University Computing Center
Date: Thu, 21 Jan 1993 21:46:29 GMT

>> Ok, we got into CAS from internet, but how do you capture your search? We 
>> would like more information about the commands once you are connected through
>> telnet.
>> Thanks in advance!
>
>That depends entirely on what type of software you are running on your
>computer system.  If dialing in from home, check your communications
>software manual, if on another system, check with your system manager
>on how to do this.
>

The simple answer is that your 'communication software' has some way of 
logging all the information that comes over the screen. this is a 
file that can then be edited using any word processor. Kermit for the 
mac and PC have a very easy protocol to 'log the session' to a file.

Anders

Newsgroups: sci.chem
From: nuke@reed.edu (Bill Newcomb)
Subject: Re: XRAY diffraction of C60 CRISTAL
Organization: Reed College, Portland, OR
Date: Thu, 21 Jan 1993 17:39:50 GMT

laurent@cenerg.cma.f writes:
>Some studies have been carried out on X ray characterization
>of C60 cristal:

>1 - What does an X ray diffraction spectrum of C60 cristal
>look like ?

A bunch of dots, I'm sure. Almost all diffraction patterns do (well,
powder patters look like a bunch of circles, but I assume you mean single
crystal). It's somewhat straightforward to get the structure from that dot
pattern, but only very rough features can be gotten from jsut looking at
the pattern. 

>2 - Because caracteristic dimension of the cristal grid is 
>about 10 nm why using X ray ? Wouldn't it be better 
>to use greater wave length ?

You might use 10nm light if you only wanted to know how the speres were
packed. With x-rays, you stand a good chance of being able to tell where
individual atoms are, thus gaining a great deal of information. 

It'd be neat to see an ortep diagram of the ball.

Bill Newcomb

--
~/.oo
From: mjb@acsu.buffalo.edu (Matthew J. Bernhardt)
Newsgroups: sci.chem
Subject: Re: Chemical fog
Keywords: Fog
Date: 26 Jan 93 21:21:32 GMT
Distribution: usa
Organization: UB

dehaseth@athena.cs.uga.edu (James A de Haseth) writes:

>Does anyone know how to make a fog that lies close to the floor (about
>8 to 12 inches thick) and is non-toxic?  I can do this with LN_2 and
>hot water, but I'm looking for something a bit cheaper.  I'll be
>doing this around kids, so I don't want anything that can be really
>dangerous.

	I would think that dry ice in water might work, although you would have
to be sure that the kids would not be lying down on the floor where they might
get an overdose of CO2.
	Comments, suggestions, flames?
-- 
Matt Bernhardt
University of Buffalo            If it is to be, it is up to me.
mjb@acsu.buffalo.edu
From: blom@husc15.harvard.edu
Newsgroups: sci.chem
Subject: Re: Technetium
Date: 21 Jan 93 20:55:38 GMT
Organization: Harvard University Science Center

The most stable isotope of Technetium has 43 protons and 55 neutrons, neither
of which complete shells, and neither of which pair spins.  Adding and
subtracting neutrons puts Technetium father above or below the belt of
stability.  Technetium was doomed, therefore, to eternal radioactivity.

Eric Blom
Harvard U
From: 159muehlberg@gw.wmich.edu
Newsgroups: sci.chem
Subject: The never-ending query
Date: 25 Jan 93 20:14:47 EST
Organization: Western Michigan University

a big "aw, shucks" to the folk who mentioned the newsgroup posting...

Now to business:

A few posts previous, I mentioned a chromatic demo...while all
of the contributions have been nice, the one I saw was constantly
agitated, and changed from, among other colors, blue to orange to
green to teal to purple to yellow (not neccesarily in that order).

I trudge along in the quest for the answer to this bunsen, I mean, 
burning question.  (punish me if you must)

Ellen Muehlberger
Western Michigan University
159muehlberg@gw.wmich.edu
"Jane, stop this crazy thing!"
From: nuke@reed.edu (Bill Newcomb)
Newsgroups: sci.chem
Subject: Re: free alkali metals
Date: 25 Jan 93 02:17:58 GMT
Article-I.D.: reed.1993Jan25.021758.25556
Organization: Reed College, Portland, OR

blom@husc15.harvard.edu writes:
>In article <1993Jan25.001014.19062@reed.edu>, nuke@reed.edu (Bill Newcomb) writes:
>> I haven't ever had to actually buy sodium, as it seems to be omnipresent in
>> most reasearch labs. I would wager that it's pretty cheap.

>Cheap, yes, but not free...  :)

Have you priced a current supply lately? Melting the NaCl alone would use
several hundred watts. You just can't beat economies of scale when it comes
to chemicals that aren't USP or otherwise in need of extreme purity.

Bill

P.S. You might try trimming the included text next time. People will love
you for it.
--
~/.oo
From: ghmo@msus1.msus.edu
Newsgroups: sci.chem
Subject: Re: Mac Fonts with double arrow
Date: 26 Jan 93 08:56:48 -0600
Organization: Minnesota State University System

Chris W. asked about a Macintosh font with the type of double arrow
used for equilibria expressions.

Two fonts that have this are Chem Font and MacChemistry font.

MacChemistry is/was sold by a private company, along with many
pages of graphics that are time savers for chemists preparing
educational material. What company and is it still in business?

Chem Font is one of 2 fonts distributed by Project Seriphim, an 
NSF funded project, run by Dr. John W. Moore. There is much information
about Proect Seriphim in older issues of the Journal of Chemical
Education, through which much of their software was distributed.
Current availability, I don't know. This price was right, however.

Jerry M., Bemidji State University, Bemidji, MN  {Brrr-midji :-) }

Newsgroups: sci.chem
From: lordj@vccnw06.its.rpi.edu (Joel Patrick Lord)
Subject: Chem Abstracts on the Net
Reply-To: lordj@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Thu, 28 Jan 1993 05:02:07 GMT

I know that this came up a week or two ago, but I seem to have lost
the address.  Could someone mail it to me again?

Joel Lord (lordj@rpi.edu)
-- 
Sleep is a very valuable commodity.  Unfortunately, you never realize
just how valuable it is, until you can't get any.
Newsgroups: sci.chem
From: clumsden@TrentU.CA (Cam Lumsden)
Subject: Re: Trichloroacetic Acid
Reply-To: clumsden@TrentU.CA
Organization: Trent University, Peterborough
Date: Fri, 22 Jan 1993 22:44:35 GMT

In article <1993Jan20.080029.1@bb1t.monsanto.com>, bjgaed@bb1t.monsanto.com writes:
>In article <9gXNXB2w165w@gilligan.tsoft.net>, bbs.byron@gilligan.tsoft.net (Byron Reynolds) writes:
>>  
>> I've got this rather annoying little wart on my thumb, and my doctor
>> prescribed Trichloroacetic Acid to "burn it off".  The only problem is
>> that they want $59.00 for 3ml, and I as a Chemistry Enthusiast, do not
>> feel right spending $59.00 for a little splash of solution.
>>  
>> Does anyone know if Trichloroacetic Acid can be purchased as a chemical
>> solution through normal sources without a licence?  If so, Where?
>
>It does not appear to be a DEA controlled substance (yet).  It is 
>commonly available from many lab and chemical supply dealers.
>
>
>>  
>> Judging by the name, and from what I can guesstimate the molecular 
>> structure to be, it should be possible to Chlorinate normal Glacial 
>> Acetic acid, yes?
>
>Not that simple.
>
>>  Does anyone have some good suggestions on how I might 
>> go about doing this?
>
>Yes. Don't.
>
>If you read the front of any chemical supply catalog you will find a 
>statement saying that, among other things, the products sold may NOT 
>be used as drugs (that includes the use you described.)  It is a 
>violation of federal law for you to purchase trichloroacetic acid for 
>this purpose and for the dealer to knowingly sell it to you for this 
>purpose.  The Good Reason for this is because the material sold for 
>drug use is U.S.P. grade, which means it has been specifically tested 
>for certain harmful impurities.  While the lab grade may be even more 
>pure in absolute terms, it may not have been tested for these 
>impurities. Also, if indeed it is a solution, if you don't get the 
>concentration right you could do permanent damage to your skin.
>
>You are just going to have to pony up the $59.00.  You are *not* 
>paying for the chemical, which is probably worth only a few cents.  
>You are paying for the testing of the chemical, the government 
>regulations (which protect YOU), the clinical trials which proved that 
>this treatment is "safe and effective", and for all those lawsuits 
>people are going to file against the drug company.
>
>
Why don't you go to the drug store and buy some "Compound W" which has 
salicylic acid as its active ingredient.  It sells for ~ $1/g.
Save yourself some time and possible harm and just get the kind at the 
store instead of trying to be a pharmaceutical chemist!

Newsgroups: sci.chem
From: aar_osman@gsbacd.uchicago.edu
Subject: Structural Analysis - How?
Organization: 
Date: Fri, 22 Jan 1993 05:02:36 GMT

Hello,
	I have a crystalline substance that I have been asked to determine
the structure.  Since, I have not done this for a long time, I was wondering
if this process is automated under present technology.  Does anybody know
of any "analysis company" that does this on a turn-key basis?  In the old
days, I used infrared spectrum, NMR spectrum, UV, and GC-MS to conclude a
structure.  I always thought that GC-MS had the potential of automating
this.  Does anybody in the net know anything about this? Can somebody
help?

	I do not read this regularly --- I will greatly appreciate if some
good soul will reply to me directly.

	Thanks in advance.

/Osman
 
Newsgroups: sci.chem
From: heiko@chemie.fu-berlin.de (Heiko Schlichting)
Subject: Re: STN access via Internet ?
X-Format: RFC822/1036
Organization: Free University of Berlin, Dept. of Chemistry
Date: Thu, 28 Jan 1993 16:09:23 GMT

andreas@gotcha.swb.de (Andreas Heitmann) writes:

>Today i tried to get access to the STN database via Internet
>without success. A friend of mine has to do some investigation
>about nuclear chemistry and the only person who knows how
>to log in to STN is on vacation. I'd be happy if someone
>could give me an Internet address of a STN node.

I assume that you want the IP number of STN in Karlsruhe. There
is no direct access possible but you can use the telnet-X.29
gateway from the German Research Network (DFN).
For this you should connect to 192.88.108.112 which is converted to
an X.29 call to (Germany)45050160241 [STN-International]. Be sure that
the parameters are set to 7-Bit (unusual in the Internet).

Internet access to STN in USA is useless for Germans because the IDs from
STN-International in Karlsruhe does not work in Colombo.

Hope this helps.

Heiko
--
Heiko Schlichting               heiko@Chemie.FU-Berlin.DE
Freie Universitaet Berlin, Institut fuer Kristallographie
From: babar+@pitt.edu (Jonggu Moon)
Newsgroups: sci.chem
Subject: kimchee without the smell
Keywords: Fog
Date: 28 Jan 93 18:37:07 GMT
Distribution: usa
Organization: University of Pittsburgh


A local supermarket sells mass produced kimchee.
All the fermentation but without the smell of decay.

Can't imagine how they were able to separated the two 
events. Either they are different chemical reactions 
or even different organizms.

Any korean chemists out there ?

- jon
From: CHT012@DJUKFA11.BITNET (H.J. Steinmetz)
Newsgroups: sci.chem
Subject: microwave-oven
Date: 27 Jan 93 12:17:26 GMT
Organization: Forschungszentrum Juelich

Currently we are trying to extract (stable or radioactive) alkaline,
earth alkaline or transition metal ions, actinide ions and some
anions from ion exchange resins (radioactive waste) under pressure
in a microwave oven. We want to analyze the obtained solution by
HPLC (common ion-chromatography).
Has anyone experiences in extraction techniques using the microwave oven and
can give us some advices. Is someone interested in exchange of experience?

Hans-Juergen
Produktkontrollstelle fuer radioaktive Abfaelle
Newsgroups: sci.chem
From: aflorjan@magnus.acs.ohio-state.edu (Alan S Florjancic)
Subject: Re: Dining Escapades.
Organization: The Ohio State University
Date: Sat, 23 Jan 1993 14:13:22 GMT

A good modification of this experiment was a favorite of mine in college...

Take any carbonated beverage, my personal favorite for this trick is ginger
ale, and pour a nice layer of pepper on top.  Make it fairly thick and uniform,
then add, in a large lump in the center, salt.  Keep piling on the salt until
it becomes heavy enough to drop through the pepper and into your pop.  Instant
Mt. St. Helens.....Make sure you do this on a tray or plate of some kind
because this thing can really go on you if you have a full glass of beverage.
And for all of you non-chemists out there, do not try this at home.  We are
professionals.

Cheers!
Alan S. Florjancic

--and to think that my parents paid a lot of money to teach me parlor games...
Newsgroups: sci.chem
From: eneafsey@lucpul.it.luc.edu (E. J. Neafsey)
Subject: Inexpensive gradient controller for HPLC ???
Summary: Looking for a inexpensive but good gradient controller for HPLC
Keywords: HPLC, gradient
Organization: Loyola University Chicago
Date: Tue, 26 Jan 1993 22:09:51 GMT

I am looking for recommendations for a good, inexpensive (<$3000?)
gradient controller for HPLC.  I have two Altex 110A pumps and have an
old XT available to use for this system.  Anspec offers one for about
$3600, but before I buy I would like to find out what else is
available. 

Please respond via email to my colleague: mcollin@lucpug.it.luc.edu
Newsgroups: sci.chem
From: gn@cc.gatech.edu (toM o. genesE)
Subject: Chemical Word Processor for PC
Reply-To: gn@cc.gatech.edu (toM o. genesE)
Organization: Georgia Institute of Technology
Distribution: usa
Date: Fri, 22 Jan 1993 15:57:04 GMT

Hello,

  I am looking for an *inexpensive* (student budget ;-) chemical word
processing system for a PC.  I'd like to be able to connect ring
structures, add groups, etc., as well as supplement the drawings with
text if necessary.

  Any suggestions?  Please respond via email.

  Thanx.

toM o. genesE            Skiing  Oh       _    An explanation for the above
#8-): P2&C&U&L2&S3WIT     and     My!  __/ )     message can probably be
Inet: gn@cc.gatech.edu     Skating:   (    )     found in the DSM-III-R.
Home: gn@philios.atl.ga.us           --=---=-  Look out!  A psychiatrist
UUCP: ...!rutgers!emory!philios!gn  O O O O O    in training!  Grab you head!
Newsgroups: sci.chem
From: hoefling@sp28.csrd.uiuc.edu (Jay Hoeflinger)
Subject: Re: Dining Escapades.
Organization: /homes/hoefling/.organization
	<1993Jan23.141322.16214@magnus.acs.ohio-state.edu>
Date: 23 Jan 93 15:06:11


OK, what's the chemical reaction equation for what's going on with
the Salt plus carbonated water thing?  And speaking of that, what's 
the chemical equation for the vinegar and baking soda reaction?

Jay Hoeflinger
--
Jay Hoeflinger
hoefling@csrd.uiuc.edu

Center for Supercomputing Research and Development, Compiler Group
U of Illinois at Urbana-Champaign
(217) 244-0288
From: Ligon@macgw1.ge.com (Woody Ligon)
Newsgroups: sci.chem
Subject: Re: Trichloroacetic Acid
Date: 21 Jan 93 19:05:40 GMT
Followup-To: sci.chem
Organization: GE-CRD

In article <1993Jan21.151150.28154@ux1.cts.eiu.edu>, cfthb@ux1.cts.eiu.edu
(Howard Black) wrote:
> 
> In article <1993Jan20.080029.1@bb1t.monsanto.com> bjgaed@bb1t.monsanto.com writes:
> >> Does anyone know if Trichloroacetic Acid can be purchased as a chemical
> >> solution through normal sources without a licence?  If so, Where?
> >
> >It does not appear to be a DEA controlled substance (yet). 
> 
>     ...and there is no reason to anticipate that it ever will be.
> -- 
>    ******************************************************************
>      Howard Black                             cfthb@ux1.cts.eiu.edu
>      Department of Chemistry                  Eastern Illinois Univ. 


NO reason! Well how about cynicism!

 A component of our company recently tried to send 10 ml of polymer extract
through US customs so that we could analyze it under exactly the same
conditions that had been used in Europe.  The solvent for the extract was
acetone.

Because of this 10 ml of acetone, we lost 2 months getting the shipment
though customs and the bill from the customs broker was $800. 

I personally had to undergo two, 1/2 hour discussions with the customs
broker as I tried to explain to absolutely no avail that I could go down
and buy a gallon of this same material at my local hardware.

By the time the sample actually arrived in my lab, we had no confidence
whatsoever that it hadn't changed and we had to repeat a long involved
extraction procedure anyway. 

After this experience, I don't think that there is any chemical including
water which might not be regulated at some point. After, all we are already
talking about regulating monosodium glutamate out of nothing but pure
unadulterated ignorance--since it is clearly impossible to eat virtually
any protein and not end up with glutamate in the gut after hydrolysis of
the protein. 

TCA is a very strong acid, it may not be regulated by DEA but it will be
regulated by somebody, you can bank on that!

Woody Ligon
(ligon@macgw1.crd.ge.com)
Standard Disclaimer applies.
Newsgroups: sci.chem,sci.misc,sci.bio
From: cheeze@wam.umd.edu (Joshbo )
Subject: Glues from milk?
Followup-To: sci.chem,sci.misc,sci.bio
Organization: Workstations at Maryland, University of Maryland, College Park
Distribution: usa
Date: Thu, 21 Jan 1993 19:21:49 GMT

Everyone,

I was reading about glues made from milk curd -- casein glue I
think it's called.  Basically, I think you add vinegar to
warm milk, the milk sours producing the curd, and then the curd
is mixed with a base like baking soda and then diluted with
water.  Is this correct?  Will this produce a glue like the
white glue you buy for children?  What is the chemistry behind
this?

Also, When this glue dries, I assume it becomes rigid anD inflexible.
What can you add to the glue to make it dry flexible -- like a 
plastic?  Or, how could I synthesize a flexible plastic of my
own if the glue doesn't work?

                                 Thanks,
                                 Joshua Bloomberg
                                 Cheeze@wam.umd.edu