HDTenEightyP/NetNews huggingface dataset:
From: bjgaed@bb1t.monsanto.com
Subject: Re: Help with a subject.
Organization: Monsanto Company, St. Louis, MO
Date: Thu, 19 Nov 1992 13:30:38 GMT

In article <1992Nov18.120030.27446@ringer.cs.utsa.edu>, modowd@lonestar.utsa.edu (Michael T. O'Dowd) writes:
> Greetings all out there. I am a new poster to this group and wanted to know
> if there was anyone out there at all that could help me with a chemical.
> 
> I would like to know if anyone knows the chemical makeup of 
> methylenedioxyamphetamine (MDA) or 3,4-methylenedioxymethamphetamine (MDMA).
> If you could inform me of some texts or periodicals where I can find any
> information on these (chemical makeup, effects, molecular weights of chemicals,
> etc.) I would appreciate it. If you can tell me yourself, I would appreciate
> that also. Please send any information to modowd@lonestar.utsa.edu. Thanks
> 
> Michael

[Rather bizarre structure deleted]

>                         
Um, Michael...

a)  That was not MDMA.  (No, it was not your ASCII graphics that was 
the problem.)

b)  I really hope that no one on this newsgroup responds to your 
questions.  (Haven't heard from ol' St. Anthony lately...)

c)  What makes you think the DEA doesn't monitor this newsgroup?  This 
is really a rather public place, you know.


-- 
--Electric Monk            (Bruce Gaede); 
                            e-mail: bjgaed@ccmail.monsanto.com

"...and then time started seriously to pass."
--Douglas Adams, _Dirk Gently's Holistic Detective Agency_
Newsgroups: sci.chem
From: leavitt@don.waisman.wisc.edu
Subject: ?HAND WARMERS ?
Organization: Waisman Center, University of Wisconsin-Madison
Date: 15 NOV 92 09:38:51 CST

How do the disposable packets of materials called
"handwarmers" work?

The contents are labelled as : iron powder,water,salt,
activated charcoal and cellulose.

Thanks,

Lewis
Newsgroups: sci.chem
From: saj@chinet.chi.il.us (Stephen Jacobs)
Subject: Re: Gold dust a fire hazard?
Summary: Not exactly
Organization: Chinet - Public Access UNIX
Date: Mon, 16 Nov 1992 04:12:54 GMT

In article <1992Nov13.162009.9771@ucsu.Colorado.EDU> smithrs@ucsu.Colorado.EDU (SMITH  RANDALL SCOTT) writes:
>In article <1992Nov13.033411.22073@dsuvax.dsu.edu> rolfe@dsuvax.dsu.edu (Tim Rolfe) writes:
>>In <1992Nov12.221840.13881@ncsu.edu> jrkitchi@eos.ncsu.edu
>>(JOHN ROBERT KITCHIN) writes:
>>
>
>Metallic gold, of course, is another matter entirely.  However, as many
>people have pointed out, almost all POWDERS , when suspended in air,
>have flash points.  For instance, wheat is not particularily explosive,
>nor is flour, but grain and flour storage silos have a nasty habit of
>exploding when emptied.  The reason that these silos can explode is that
>the dust within them is exceedingly (read explosively) combustible.

There's recently been some serious disagreement with this explanation of
explosions in grain-handling facilities.  The main puzzle is why such
explosions aren't more common, since dusty storage areas and factories, and
ignition sources are rather common.  The revisionist view (definitely minority,
but growing) is that these are methane explosions.

>
>Moreover, metal POWDERS act very differently than the metals themselves,
>in solid form.  For instance, mix together an alkyl halide and a chunk of
>magnesium and nothing will happen.  However, mix together the same
>alkyl halide and POWDERED magnesium and you'd better stand back, because
>the formation of grignard reagent is rapid and rather exothermix.  Why
>the difference?  Mainly, it has to do with the increased surface area of
>the finely divided powder.  More surface area is equivalent to more reactive
>sites...and BOOM.

A most unfortunate example, because it isn't true.  In the presence of a
good Grignard solvent (let's not go into that now), and with the usual wait
for things to get going, common alkyl halides will cheerfully munch up even
big pieces of magnesium.  On the other hand, in the absence of a 'good' solvent
(and the above reads like one is to think of working neat), common alkyl
halides don't react much (or at all) with magnesium.  For various reasons that
I consider incidental, Grignard reagent formation tends to be faster with the
usual turnings than with magnesium powder anyway.  Now if you were to go to
alkali-metal-precipitated magnesium......
                                               Steve  saj@chinet.chi.il.us
From: ms0t@ns1.cc.lehigh.edu (MATTHEW CHRISTIAN SZAP)
Newsgroups: sci.chem
Subject: Congrats to new ACS president
Date: 23 Nov 92 00:14:40 GMT
Organization: Lehigh University


congrats to:

Ned Heindel, newly-elected president of the American
Chemical Society.  To those not a member of the society,
don't read this, or, get involved.

peace, love, and chemistry,

-- 

mcszap/ms0t     :)
Mudd 648
83481
From: xenon@drycas.club.cc.cmu.edu
Newsgroups: sci.chem
Subject: Re: Frozen H2O2
Summary: ka-boom
Date: 19 Nov 92 00:07:42 GMT
Organization: Carnegie Mellon Computer Club


In article <1992Nov16.095057.3646@news.acns.nwu.edu>, dmeier@casbah.acns.nwu.edu
 (Douglas Meier) writes:
> In article <1992Nov15.083654.10497@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com
>(bill nelson) writes:
>
>>H2O2 is not relatively safe - when pure.
>
> Concerning H202 reacting with organic substances (ex. my skin).
>
> What is the reaction here?  Namely what gas is given off and what is the
> effect on the organic material?
>
> Thanks in advance.

The reaction is oxidation.  Water vapor and carbon dioxide are given
off.

- xenon
From: treesh@bach.helios.nd.edu (carey treesh)
Newsgroups: sci.chem
Subject: Glowing Light Stick, how do they work?
Date: 18 Nov 92 21:47:54 GMT
Organization: OUC, University of Notre Dame

Sorry if this comes out twice, I posted this the other day, but I dont think
it got past our news server.

I was wondering if anyone can tell me how these light sticks work?  What
chemicals are they using, and how dose this reaction take place?  Is it
possible to make my own rather they have to buy them from a supplier? 
Would it be cost effective?  

Cylume us the only manufacture I have ever seen to produce "chemical light"
and I was wondering how its done?

Thanks for any and all help.

ctfm
From: whitbeck@equinox.unr.edu (Michael Whitbeck)
Newsgroups: sci.chem
Subject: Re: Gold dust a fire hazard?
Date: 16 Nov 92 18:46:20 GMT
Organization: University of Nevada, Reno

In article <1e0rf6INNgun@usenet.INS.CWRU.Edu> ce698@cleveland.Freenet.Edu (A. McPherson) writes:
>
>...interesting to confirm
>the prediction, which is based on fairly well known thermodynamic
>principles, with a test, just in case we have missed some other

I would like to point out, amidst all the *wild*
speculation, that the chemical potential of a
*finely* divided solid differs from that of bulk
material:

$\mu  =  \mu_0 + f(S) $

where $\mu_0$ is the bulk chemical potential in
some standard state and f(S) is a function of
surface area (and hence particle size).

This of course changes the outcome of any classic
thermo calculation for $\Delta G$

As for the reactivity of Au metal; sure conc nitric
is rather ineffective at attacking it-- but try a
solution of NaCN!


Mike W.

___________________________________________________________
|Mike Whitbeck             | whitbeck@equinox.unr.edu     |
|Desert Research Inst.     | whitbeck@wrc.unr.edu         |
|POB 60220                 |                              |
|RENO, NV 89506            | 702-673-7348                 |
|__________________________|______________________________|

All academics have the potential for being insatiable...
but the chemists are the most expensive and insatiable among the
expensive and insatiable. - J. Martin in "To Rise Above Principle"
Newsgroups: sci.chem
From: joec@fid.morgan.com (Joe Collins)
Subject: Re: ?HAND WARMERS ?
Organization: None
Date: Thu, 19 Nov 1992 21:09:35 GMT

In article <1992Nov19.051851.4521@ntuix.ntu.ac.sg> mgqlu@ntuix.ntu.ac.sg (Max Lu) writes:
>It seems to me that the water and activated charcoal are the heat-generating
>chemicals.  When water adsorbed into the charcoal, a significant amount
>of heat will be released.  but not sure what the iron powder and salt do?
>
>Anyone has more ideas on this?  BTW, who is the manufacturer of such a 
>handwarmer?

An educated guess:

The water/salt mixture will react with the iron powder to form rust.
The iron powder increases the surface area, i.e. faster reaction.
The salt probably is used to 'clean' the iron surface (a real guess!).
The activated charcoal may absorb gaseous by-products.

If you wish to see a rust reaction which will heat up, put steel wool
(the no soap type) in a tall glass and pour strong clorox over it, filling
the glass and covering the steel wool. The reaction will make the water
temperature get quite warm (140 degress F?) once it starts to react.

Joe
joec@morgan.com
Xref: sparky sci.chem:4761 comp.graphics.avs:944
From: refson@castle.ed.ac.uk (Keith Refson)
Newsgroups: sci.chem,comp.graphics.avs
Subject: Re: AVS and chemistry
Date: 21 Nov 92 10:45:41 GMT
Organization: Edinburgh University

rzepa@ic.ac.uk (Henry Rzepa) writes:

>I would also mention that both AVS and Chemistry viewer are not CHEAP!

But since Imperial College has signed up for the CHEST site license
deal, you must be able to get it for every machine in your department
for a fraction of the price of a single-user license!

------------------------------------------------------------------------------
| JANET   : keith@uk.ac.ox.earth        |   Keith   Refson                   |
| World   : keith@earth.ox.ac.uk        |   Department of Earth Sciences     |
| BITNET  : keith%uk.ac.ox.earth@ukacrl |   Parks Road, Oxford OX1 3PR, UK   |
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------------------------------------------------------------------------------
Newsgroups: sci.chem
From: tomas_e@LINK.Physchem.KTH.SE (Tomas Eriksson)
Subject: Re: Heavy water separation
Reply-To: tomas_e@LINK.Physchem.KTH.SE
Organization: Royal Institute of Technology, Stockholm
Date: Sun, 15 Nov 1992 17:08:03 GMT

In article <1992Nov11.185537.1705@engage.pko.dec.com>, moroney@ramblr.enet.dec.com writes:
>Question on a 'different form' of heavy water:
>
>Does H O-18 (water with normal hydrogen but the oxygen-18 isotope) behave
>      2
>more like normal water or heavy water in its melting point, boiling point,
>density, biological effects etc?  It has the same molecular weight as
>D O.  How about "superheavy water", D O-18?     T O-18 anyone?
> 2                                   2           2

When you say "superheavy water", you usally refer to tritium oxide, 
T_{2}O.

Generally, you won't see as dramatic effects changing ^{16}O to some 
other oxygen isotope, as you will upon changing ^1{H} to ^2{H}; in this 
case, the high-school chemistry rule "isotopes of an element are the same 
chemically" actually apply.

Only changing H -> D gives you a 100% increase in mass of that atom, 
with corresponding changes in molecular vibrational frequencies 
involving that atom, which also changes IR spectra of that molecule, and 
so on. And since water is the amazing compound it is (water would 
easily win the contest for "most interesting compound" - even though you 
may get the impression that this presently-fashionable species of soot - 
buckminsterfullerene or whatever - is more interesting), and the H atom 
is involved in so many chemical and physicochemical processes, H -> D 
effects are very interesting and quite noticeable.

Of course, in some properties where the mass of the molecule is an 
important factor, ^{2}H_{2}^{16}O and ^{1}H_{2}^{18}O will show roughly 
the same difference from ^{1}H_{2}^{16}O; but surely a 1 K change in 
boiling point is much less interesting than a, say, factor three 
reduction in a reaction rate of a certain reaction, or a substantial 
shift in IR absorption frequency?

Superheavy water, T_{2}O or ^{3}H_{2}^{16}O, is much less used than 
D_{2}O for two good reasons: it's radioactive, and it's expensive. But 
sure, you'd see the same qualitative effects with tritium as with 
deuterium, with an even higher quantitative deviation.

Tomas
-------------------------------------------------------------------------------
Tomas Eriksson                                          tomas_e@physchem.kth.se
            Surface Force Group, Department of Physical Chemistry,
               Royal Institute of Technology, Stockholm, Sweden

"These latter-day practitioners of surface chemistry reflect a lingering of the
adventurous spirit of the Enlightment" -- Charles Tanford
Newsgroups: sci.chem,comp.graphics.avs
From: rzepa@ic.ac.uk (Henry Rzepa)
Subject: Re: AVS and chemistry
X-UserAgent: Nuntius v1.1.1d12
X-XXMessage-ID: <A7328A01B80150FD@macb.ch.ic.ac.uk>
Organization: Department of Chemistry, Imperial College
Date: Fri, 20 Nov 92 12:26:46 GMT
X-XXDate: Fri, 20 Nov 92 12:26:41 GMT

In article <83837@ut-emx.uucp> Renzo Balducci,
balducci@phenyl.phr.utexas.edu writes:
>


It should be pointed out that Explorer also has a free archive
(at epcc.edinburgh.ac.uk) and also appears in the comp.graphics.explorer
news! 
I would also mention that both AVS and Chemistry viewer are not CHEAP!
Do not put all your eggs in one basket
_____________________________________________
|  Dr Henry S Rzepa.                       Tel:   +44  71 225 8339 
|  Department of Chemistry           Fax:   +44 71 589 3869  
|  Imperial College                        Email: rzepa@ic.ac.uk
|  LONDON SW7 2AY
| Sent using Eudora 1.3b98.                 
_____________________________________________
Newsgroups: sci.chem
From: bjgaed@bb1t.monsanto.com
Subject: Re: Motor Oil Disposed Exceeds Exxon Valdez 
Organization: Monsanto Company, St. Louis, MO
Date: Thu, 19 Nov 1992 13:13:44 GMT

In article <1992Nov18.033603.13336@news.clarkson.edu>, rajat@sunny3.che.clarkson.edu (Rajat Kapoor) writes:

> I learnt an eye-opening fact from a science program (or maybe news)
> aired over Canadian TV, that the total amount of motor oil disposed off by
> Canadians far exceeds Exxon Valdez spill or the one during
> Gulf war.
> 
> The program also showed shots of shut-down waste-oil recovery units in
> dilapidated state - reason : uneconomical to run.
> 
> This isn't a Canadian problem, I bet similar figures exist for
> many countries.
> 
> Kapoor

There is absolutely no reason for this state of affairs to continue.  
Where I live there are several companies that deal in waste oil.  When 
I have collected one or two gallon jugs I stop off on the way to or 
from work (it's less than half a mile out of my way) where the company 
has a big tank along side the road and a sign saying:

"STOP POLLUTION! DUMP USED OIL HERE."

You can pull your car over and pour your oil into their tank.  The 
only ask that you not leave your containers (which most people use 
over and over for their used oil.)

This is one solution.  A few years back one of the major oil companies 
started a policy of accepting used oil at their service stations, but 
this hasn't worked well because most of their service stations are now 
self-service gasoline only with no mechanical service.

Some states have simply passed laws requiring any shop that does oil 
changes to accept used oil from the public.  This is one case where 
the infrastructure for collection of a recyclable material is already 
in place.  I don't think this involves any cost to the business since 
they are already required to recylce their used oils.  There was some 
resistance to these laws because the businesses thought they might be 
exposed to liability or be required to be licensed hazardous waste 
operators.  Some legislation might be required exempting these 
businesses from certain regulations and liabilities.

This is a situation where the opportunity exists for the consumer to 
conveniently recycle a material, for the local sewer treatment plant 
to avoid a very nasty contaminant, for the mechanic to perform a 
public wervice at no cost, for the waste oil dealers to obtain a 
material they would otherwise have to buy (this oil usually goes into 
road paving material unless a refinery is nearby), and the oil 
industry has a chance to show the public that they are doing something 
positive for conservation.  Just about everybody wins.  

As noted above, some slight legislative adjustments may be needed, and 
maybe the oil companies could get a slight tax break for the amount of 
recycled oil used.

Am I missing something here?  Anything this simple must have a flaw. 
8{)


--Electric Monk            (Bruce Gaede); 
                            e-mail: bjgaed@ccmail.monsanto.com

"...and then time started seriously to pass."
--Douglas Adams, _Dirk Gently's Holistic Detective Agency_
Newsgroups: sci.chem
From: potucek@winx06.informatik.uni-wuerzburg.de (R.Potucek)
Subject: Looking for Problem Partner
Organization: University of Wuerzburg, Germany
X-Newsreader: TIN [version 1.1 PL6]
Date: Tue, 17 Nov 1992 21:43:20 GMT


Hello you all!

I am a german student of chemistry learning for my first true exam 
(Vordiplom) and I am looking for someone I could work with solving
chemistry problems via e-mail. 

I was thinking about some kind of arrangement, where we could mutually 
ask questions and work on them together. I speak german and english fairly
well -- otherwise I don't know.

If you are interested, I would very much like to hear about it,

				Rudolf


---------------------------------------------------+----------------------------
Rudolf Potucek jr.                                 |  A quitter never wins,
University of Wuerzburg                            |  A winner never quits,
                                                   |  but it takes a Human to
potucek@winx06.informatik.uni-wuerzburg.de         |     quit in time
---------------------------------------------------+----------------------------
From: ps02@ns1.cc.lehigh.edu (PENELOPE E. SMITH)
Newsgroups: sci.chem
Subject: Re: Why Not ? (Re: Ethanol fuel
Date: 16 Nov 92 19:30:13 GMT
Organization: Lehigh University

(Lots of discussion on ETHANOL as fuel deleted)

I want my car to run on Honey or other carbohydrates, sort of like the home
energy fusion reactor in the car in back to the future.  This type of fuel
cell has the advantage of not requiring distillation!

-- 
 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Penelope E. Smith               PS02@NS.CC.LEHIGH.EDU
Department of Mathematics       PS02@LEHIGH.BITNET
Lehigh University
Bethlehem, PA
From: shirriff@sprite.berkeley.edu (Ken Shirriff)
Newsgroups: sci.chem
Subject: Re: Gold dust a fire hazard?
Date: 16 Nov 1992 06:43:10 GMT
Organization: University of California, Berkeley
NNTP-Posting-Host: hijack.berkeley.edu

In article <1992Nov13.144439.2924@fid.morgan.com> joec@fid.morgan.com (Joe Collins) writes:
>>to get a feeling for burning metals, one need
>>not look any further than the effects of the exocet missles on some of the
>>vessel hulls in the Falklands war.
>The UK ship had an aluminum body and Aluminum is a fairly reactive metal.

People in sci.military who should know say that the Sheffield's superstructure
was steel, not aluminum, and it did not burn.  The flammable interior of
the ship burned as a result of the missile explosion, but the metal
superstructure did not burn.  In 1975, the USS Belknap, which did have an
aluminum superstructure, suffered a severe fire; the superstructure melted,
but did not burn.

Ken Shirriff				shirriff@sprite.Berkeley.EDU
From: hendric@chester.ksu.ksu.edu (Richard Hendricks)
Newsgroups: sci.chem
Subject: h2o2 and disinfection...
Date: 23 Nov 1992 10:35:38 -0600
Organization: Kansas State University
NNTP-Posting-Host: chester.ksu.ksu.edu

Does anyone know exactly why h2o2 is used for disinfection/put on wounds?
Does it kill bacteria by the release of free o2, by heat produced during
the reaction, or what?
thanks!
-richard hendricks
hendric@matt.ksu.ksu.edu
ps, dont replay directly to me!  send it to matt.ksu.ksu.edu instead...

Newsgroups: sci.chem,comp.graphics.avs
From: mroussel@alchemy.chem.utoronto.ca (Marc Roussel)
Subject: Re: AVS and chemistry
Organization: Department of Chemistry, University of Toronto
Date: Tue, 17 Nov 1992 22:45:21 GMT

In article <83837@ut-emx.uucp> balducci@phenyl.phr.utexas.edu (Renzo Balducci)
writes:
>I have very recently "discovered" the existence of the AVS package from
>Advanced Visual Systems. It was brought to my attention that this package
>is being extensively used (among many other things) for molecular modeling 
>and theoretical chemistry applications.

     I use none of these packages ("When I was young, we didn't have any
of those fancy visualization packages and we liked it that way!") and I
have no association with the makers of any of them.  However, since I
happen to know about them, I would like to point out that there are a
few other similar-featured packages available.
     If you have Silicon Graphics workstations, you should mention AVS
to your SGI sales representative.  SGI has something similar (whose name
I forget), and I think you can get their product cheap.  In particular,
if you're buying a new workstation, you might be able to get them to throw
it in for free.  (A year or two ago, an SGI sales rep. hinted that this
might be possible when I asked.  Note that I am at an educational site
and that those of you at corporate settings might find that no one is
willing to give you anything.  Obviously also, even if they give it to
you, software maintenance will not likely be free.)
     You might also want to talk to IMSL.  They have something which I
believe is called IMSL/IDL.  I think that it does a lot of the same
things as AVS, but I'm not sure.

				Marc R. Roussel
                                mroussel@alchemy.chem.utoronto.ca
Newsgroups: sci.chem
From: ckp@netcom.com (Charles Pooley)
Subject: Re: Bucky things
Summary: Bucky melting point?
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Sat, 21 Nov 1992 21:29:53 GMT


In all the discussions of properties of fullerenes, has anyone heard of
determinations of a melting point?  of triple point pressure?  of
determinations of vapor pressure at temp up to 2000 C (ie, by Langmuir
or Knudsen method)?

From the literature, it looks like , say, C60 should have a melting point
below 3000 C and a low t.p. (< 1 bar).    Any info, rumors?  Why so little
said on the subject???
-- 
Charles Pooley                  ckp@netcom.com    GEnie  c.pooley
EE consultant, Los Angeles, CA
Newsgroups: sci.cryonics