HDTenEightyP/NetNews huggingface dataset:
From: bobert@informix.com (Robert Murphy)
Newsgroups: sci.chem
Subject: Re: Heavy water separation
Date: 6 Nov 92 21:25:31 GMT
Organization: Informix Software, Inc.

Back in the early '80s, when I was in grad school working on a Ph.D. in
organic chemistry, I looked into some issues around heavy water.  I was
actually interested in writing a mystery story in which the victim was
murdered by spiking his coffee with heavy water.  Here's what I found out
(and why I never wrote the story).

The most common form of heavy water is HOD, of course.  Its boiling point
is slightly higher than that of HOH, and so it can be separated from regular
water by very efficient fractional distillation.  Several passes through a
spinning-band fractionator will do a credible job.  It helps to start with
water that's already enriched in HOD, such as drainiage from boilers used
for steam-heating buildings.  I understand that some of the Canadian nuclear
plants make their own fresh heavy water by fractional distillation of water
from the St. Lawrence Seaway.  So, I gues the answer is that you can make
HOD yourself, but you'll need a lot of water and some really good equipment
and a lot of patience.

There are several grades of HOD available commercially.  Spectral
grade is, of course, very pure.  If you're willing to take lower purity
(like 95% HOD and 5% H2O), you can get it pretty inexpensively.  The same
holds for D2O, although it's much more expensive than HOD.

On to the physiological effects.  I finally found an article on this in one
of the nontechnical chem journals from the late '70s or early '80s - I
don't remember which one (C&E News?  J. Chem Ed.?), and I was severely
disappointed.  It seems somebody back in in the '30s gave some rats heavy
water as their sole drink.  The effect was to make them hyperactive; it
didn't kill them directly, although they eventually died of stress after
several weeks..  The post-mortem showed that its primary effect was the
same as caffeine: it blocked the uptake and/or metabolism of epinephrine
released into the interneural gap when neurons fired.  In other words, it
was like giving the rats nothing but instant coffee for food (BOINGGGG!!!).

So, although I wouldn't deliberately go out and drink heavy water, it's not
particularly toxic, and certainly a cup full of it wouldn't kill you.  So
much for my mystery story...  BTW, in one episode of Hogan's Heroes, our
boys stole some heavy water from the German reactor program and gave it to
Sgt. Schultz to drink, who suffered no adverse effects.

Bob Murphy

P.S.  Back when I was looking for it, HOD and D2O weren't listed in Sax.
Are they in there now?
From: rickert@cco.caltech.edu (Keith Warren Rickert)
Newsgroups: sci.chem
Subject: Re: GRAVITY-NEUTRALIZING CHAMBER
Date: 6 Nov 1992 01:20:16 GMT
Organization: California Institute of Technology, Pasadena
NNTP-Posting-Host: sandman.caltech.edu

In <1992Nov4.182739.2114@cnsvax.uwec.edu> mcelwre@cnsvax.uwec.edu writes:

>     The ZERO/REDUCED-Gravity Chamber described below has obvious potential
>applications for Chemistry, allowing chemical processes, etc., which now can
>ONLY be done on the Space Shuttle, AT GREAT EXPENSE.
>    
[Garbage about construction of a zero-gravity chamber deleted ]

>                                        Robert E. McElwaine
>                                        B.S., Physics and Astronomy, UW-EC

Hmmm...BS in Physics and Astronomy? At this rate, could take him 
a while to get that degree.
From: hpv@kelvin.uio.no (Hans Peter Verne)
Newsgroups: sci.chem
Subject: Re: Heavy water separation
Date: 6 Nov 92 10:00:49 GMT
	<1992Nov5.013338.22094@cs.rochester.edu>
	<1992Nov6.053218.5498@discus.technion.ac.il>
Organization: University of Oslo, Norway


In article <1992Nov6.053218.5498@discus.technion.ac.il> chmoris@techunix.technion.ac.il (Moris Eisen) writes:

>>This can't be right.  The gravitational potential energy difference
>>of heavy vs. light water over a 10 centimeter depth (say) would be
>>about 10^-7 kT -- utterly negligible.  You'd need a water
>>column about 1000 kilometers deep to get significant gravitational
>>separation at 300 K.
>>
>>	Paul F. Dietz
>
>Well, Based on simple facts: water has a density of 0.998 gr/cc at STP when 
>heavy water is 1.104 gr/cc. Simple physiscs will explain whyheavy water 
>concentration will be larger at the bottom given enough time.

Ever heard of diffusion ? Brownian motions ? Random walk ?

Hugs,
Hans Peter.
From: ce698@cleveland.Freenet.Edu (A. McPherson)
Newsgroups: sci.chem
Subject: Re: Gold dust a fire hazard?
Date: 12 Nov 1992 16:21:07 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


i am no expert in this area, but most dusts are flammable when finely divided.
in fact, many have measurable explosivity ranges, depending on the particle
size and test method.  an interesting literature source is "Explosibility tests
for Industrial Dusts", Fire Research Technical Paper No. 21, which can be 
ordered from the Application Services Division, Building Research Establishment,
Garston, Watford, WD2 7JR, UK.  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.
-- 
Tobacco, coffee, alcohol, hashish, prussic acid, strychnine are
weak dilutions: the surest poison is time.
               Emerson. Society and Solitude: Old Age
From: cfthb@ux1.cts.eiu.edu (Howard Black)
Newsgroups: sci.chem
Subject: Re: hybridization of oxygen
Date: 6 Nov 92 17:04:26 GMT
Article-I.D.: ux1.1992Nov06.170426.14638
Organization: Eastern Illinois University

In article <37553@uflorida.cis.ufl.edu> lobanov@pine.circa.ufl.edu writes:
>Does anybody know the literature reference about what hybridization states
>have oxygen atoms in RCOOH if they have any hybridization at all?

    Try a basic organic chemistry book.  The O in C=O is sp2; the other is
sp3.

-- 
   ******************************************************************
     Howard Black                             cfthb@ux1.cts.eiu.edu
     Department of Chemistry                  Eastern Illinois Univ.
From: orca@StarConn.com (Sarah Emily Liberman)
Newsgroups: sci.chem
Subject: WANTED:  Inexpensive CRC Handbook of Chemistry & Physics
Date: 12 Nov 92 21:17:24 GMT
Organization: Starnet-Public Access UNIX--Los Altos, CA  415-949-3133


Would anyone know how I may obtain copies of the CRC _Handbook of Chemistry
and Physics_ at a *discount*?  I would not mind if they are older editions,
just as long as they were printed within the last 10 years.

Please send your responses via e-mail only.

Many thanks!

-sarah emily liberman		e-mail:   orca@starconn.com
Newsgroups: sci.chem
Subject: RE: Need help with ID'ing a chemical
From: pugsley@bclcl1.im.battelle.org
Date: 4 Nov 92 18:42:23 EST
Organization: Battelle, Columbus, OH

After reading the responses, I'm not sure you have what you wanted.

Given that you are not a 'chemical person', I assume that I can limit
the list of possibilies and uses to the most common.  

The most common would be Ethanethiol or Ethyl Mercaptan.  This stuff
is stinky, I mean real bad.  I've seen a demonstration where a small
flask of this stuff left open in a room of people will force everyone
out within a minute (don't ask!).  Anyway, it is most commonly used
in a gas form for placing the scent on natural gas fed to you home.
The gas company adds it in an extremely small quantity so that if you
have a natural gas leak (which would otherwise be odorless), it will
be obvious.

Based upon the way you wrote the formula (C2H5SH), that is my main 
guess.  I suppose you could also be wanting Dimethyl Sulfide which is
usually used in pesticide manufacturing, but that would normally be
written (C2H6S or CH3SCH3).

Oh, also "S" stands for Sulfur.

Hope this helps---

kdp
--------------------------------------------------------------------
|      All this science I don't understand;                        |
|        It's just my job five days a week.                        |
|                                       -Elton John                |
|                                        "Rocket Man"              |
--------------------------------------------------------------------



Newsgroups: sci.chem
From: sundermm@columbia.dsu.edu (MARC SUNDERMEYER)
Subject: Re: Heavy water separation -- amusing mis-read
Organization: Dakota State University
Date: Fri, 13 Nov 1992 01:05:22 GMT

In article <1992Nov6.171810.8748@dsuvax.dsu.edu> rolfe@dsuvax.dsu.edu (Tim Rolfe) writes:
>Newsgroups: sci.chem
>Path: dsuvax.dsu.edu!rolfe
>From: rolfe@dsuvax.dsu.edu (Tim Rolfe)
>Subject: Re: Heavy water separation -- amusing mis-read
>Message-ID: <1992Nov6.171810.8748@dsuvax.dsu.edu>
>Organization: Dakota State University
>References: <14316.3079216576@kiwi.gen.nz> <1992Nov3.180908.24563@kth.se> \
>Date: Fri, 6 Nov 1992 17:18:10 GMT
>Lines: 16
><dexter.720820821@aries> <Bx9pJn.FI2@quark.ansto.gov.au>

>In <Bx9pJn.FI2@quark.ansto.gov.au> nbx@atom.ansto.gov.au (Ned Blagojevic)
>writes:

>[...]

>>                   Animals and I believe humans can tolerate (short term)
>>D2O levels of up to 20% or more with no ill efffects (just on 10 kg D2O for 
>>a "standard "  75kg man).

>I'm afraid the first time I read this as Ned's agreeing with the animals
>that humans can tolerate . . .
>-- 
>                                              --- Tim Rolfe
>                                           rolfe@dsuvax.dsu.edu
>                                            ROLFE@SDNET.BITNET


    From what I here about Tim is that he drives to kill when going on field 
trips.  He would know what humans can tolerate.
Newsgroups: sci.chem
From: mjf9968@rigel.tamu.edu (Pi(3.143832666))
Subject: Re: GRAVITY-NEUTRALIZING CHAMBER
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Fri, 6 Nov 1992 05:00:00 GMT

In article <1992Nov4.182739.2114@cnsvax.uwec.edu>, mcelwre@cnsvax.uwec.edu writes...
> 
>                         Gravity-NEUTRALIZING Spacecraft
>                         or ZERO/REDUCED-Gravity Chamber
[...]
>               UN-altered REPRODUCTION and DISSEMINATION of this 
>          IMPORTANT Information is ENCOURAGED. 
> 
>                                        Robert E. McElwaine
>                                        B.S., Physics and Astronomy, UW-EC

	Sounds just like a machine I've seen for separating the
	seeds from marijuana.  Funny that.

	Living better through chemistry,
	Mike "Pi" Freeman
	MJF9968@rigel.tamu.edu
From: sd344@city.ac.uk (Paul Sharpe)
Newsgroups: sci.chem
Subject: Wanted: prep for acylation of acetoacetic ester
Date: 9 Nov 92 11:22:23 GMT
Distribution: sci
Organization: The City University

Does anyone know of a prep for acylation of acetoacetic ester with
an acid chloride to give B diketone with minimal o-acylation?

      _        RCOX
CH3COCHCO2Et -------> CH3COCHCO2Et
                           |
                           CO
                           R

                           |
                           |  Hydrolyze
                           |  Decarboxylate
                           |
                           |
                          \/

                        O   O 
                        ||  ||
                     CH3C CHC CR
-- 
Paul Sharpe, Unix System Programmer, City University

+44 (0)71 477 8000 x3758
Internet: P.A.Sharpe@city.ac.uk
From: whitbeck@equinox.unr.edu (Michael Whitbeck)
Newsgroups: sci.chem
Subject: Re: Heavy water separation
Date: 10 Nov 92 23:16:59 GMT
Organization: University of Nevada, Reno

In article <1992Nov6.175058.7288@kth.se> tomas_e@LINK.Physchem.KTH.SE writes:
>In article <1992Nov6.053218.5498@discus.technion.ac.il>, chmoris@techunix.technion.ac.il (Moris Eisen) writes:
>>Well, Based on simple facts: water has a density of 0.998 gr/cc at STP 
>>when heavy water is 1.104 gr/cc. Simple physiscs will explain whyheavy 
>>water concentration will be larger at the bottom given enough time.
>
>deuterium is present as HDO, monodeuterated ("half-heavy"?) water. The 
>density of HDO is probably about 1.05 g/cm^3. (Note that it's impossible 
>
>The density of ethanol is about 0.8, but I haven't noticed the top layer 
>of a vodka bottle being noticeably enriched in ethanol compared to the 
>bottom... :-)
>
>Tomas
>Tomas Eriksson                                          tomas_e@physchem.kth.se

You must not be drinking it *fast* enough! 
1) Get a fresh bottle of vodka + one drinking straw
2) insert straw to within about 1 cm from the bottom
3) sip about 1 ml of vodka- Feel any effect? Light-headed?
Euphoric?
4) Now, *quickly* suck the remainder of the vodka up with the
straw. Feel any effect now? [CAUTION ADVISED]

*Proof* that the water settles out of the vodka on standing :-),
leaving nearly 100% ethanol at the top.

Isn't *science* wonderful?

___________________________________________________________
|Mike Whitbeck             | whitbeck@equinox.unr.edu     |
|__________________________|______________________________|

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"
From: hpv@kelvin.uio.no (Hans Peter Verne)
Newsgroups: sci.chem
Subject: Re: Heavy water separation
Date: 5 Nov 92 11:24:35 GMT
	<1992Nov4.140347.179@physc1.byu.edu>
Organization: University of Oslo, Norway


In article <1992Nov4.140347.179@physc1.byu.edu>, asplundm@physc1.byu.edu (Matt Asplund) writes:

>	I had a chemistry prof. who had a tank of fish in heavy water.
>He just happened to have lots around, so he put fish in heavy water and
>they died.  The interesting thing is that when he slowly them by slowly
>increasing the concentration of heavy water, they were fine, and eventually
>he had several fish that lived exclusively in heavy water (I think one of them
>died when he put it back into normal water).

Well, not necessarily so strange. When a fish with normal water in its cells
are suddenly put in heavy water (or vice versa), the osmotic and 
electrolytical balances are probably screwed up. If the concentration 
is increased/decreased slowly, the are more likely to survive. 

Do you know if these fishes could live in heavy water for very long time ?
(ie. for the normal lifetime of a fish in a tank ) Could they reproduce ?

Hans Peter Verne      #  You should never wear your best trousers when you 
Dept. of Chemistry    #  go out to fight for freedom and liberty.
Univ. of Oslo, Norway #                  -- Henrik Ibsen
From: ph600fcy@sdcc14.ucsd.edu (Matthew Harrington)
Newsgroups: sci.chem
Subject: Need info on rechargable NiCd batteries...
Date: 10 Nov 92 01:34:31 GMT

In a freshman chemistry (or was is physics? ) lecture the professor
talked about the best way to take care of NiCd batteries.  I forget
the specifics, but it was something like always letting the
batteries run down before recharging and don't overcharge.

Does anyone know the chemistry behind these batteries and the best
way to charge them and keep them working well for awhile?

					Matt Harrington

Newsgroups: sci.chem
From: maierc@edmund.cs.andrews.edu (Christopher Maier)
Subject: Ethanol fuel
Summary: E-mail wanted 
Organization: Andrews University
Date: Thu, 12 Nov 1992 01:03:10 GMT

I'm interested in getting info on any current research in alcohol fuels.
primarily ethanol production.  Is anyone out there involved in this type
of work?  If not, does anyone know of anyone who I could correspond with
(E-mail or letters).

Please, no cracks about "...my grandpappy down in West Virgina's got
this still..."   :)

Chris Maier                     maierc@andrews.edu
Andrews U.
Newsgroups: sci.chem
From: rajat@sun.soe.clarkson.edu (Rajat Kapoor)
Subject: Lattice Imaging (?) ...Re: IBM PC chemistry program
Organization: Clarkson University
Date: Thu, 12 Nov 1992 20:17:03 GMT


On similar lines...

Are there programs for generating 3-D images of lattice structures ?

... somewhere I can feed in the lattice "fingerprint" jargon and get
the "picture"...

Rajat Kapoor

Newsgroups: sci.chem
From: knapp@spot.Colorado.EDU (David Knapp)
Subject: Re: Gold dust a fire hazard?
Organization: University of Colorado, Boulder
Date: Fri, 13 Nov 1992 15:29:06 GMT

In article <1992Nov12.221840.13881@ncsu.edu> jrkitchi@eos.ncsu.edu (JOHN ROBERT KITCHIN) writes:
>
>there are many metallic dusts which are not only flammable when in a
>fine dust, but are pyrophoric (self-igniting).  This is definitely true
>for metals such as aluminum and zinc, which are commonly used for
>explosives and pyrotechnics, so I see no reason why it would be
>different for other metals like gold and platinum.



I'll give you a reason. Redox potential.

While gold and platinum *do* form oxides, they are so weakly bound that
you can dissociate it just by shining a bright light on it! Aluminum,
on the other hand, forms such a strong oxygen bond that we call it a 
'ceramic', when vitrified.

If you don't believe me, grab a handful of gold dust and throw it into
a flame.  ;-)


-- 
David Knapp                                   University of Colorado, Boulder
Perpetual Student                                 knapp@spot.colorado.edu
Looks like hate *is* a family value after all and Colorado families are for it.

Xref: sparky sci.chem:4544 sci.bio:4114
From: chmoris@techunix.technion.ac.il (Moris Eisen)
Newsgroups: sci.chem,sci.bio
Subject: Re: Looking for info on aldehydes
Date: 12 Nov 92 16:23:21 GMT
Reply-To: chmoris@techunix.technion.ac.il (Moris Eisen)
Organization: Technion, Israel Inst. of Technology

In article <1992Nov10.021344.5627@jupiter.sun.csd.unb.ca> mikemac@jupiter.sun.csd.unb.ca (Mike MacDonald) writes:
>I have a close friend who has been quite ill lately, it appears that it may
>be related to a low level exposure to one or more of the following aldehydes.
>
>   1) propionaldehydes
>   2) acetaldehydes	
>   3) 2-methylbuteraldehydes
>   4) 2-methylpentaldehydes
>
>She is keenly interested in talking to someone (telephone style) who knows
>anything about the long term low level exposure to any and/or all of the above.
>
>Michael J. MacDonald
>Senior Systems Specialist
>Faculty of Computer Science
>University of New Brunswick
>P.O. Box 4400
>Fredericton NB Canada E3B 5A3
>

The Health Hazards for any of those 4 aldehydes are as follows:

Harmful if swallowed, inhaled, or adsorbed through the skin.
Material is irritating to mucous membranes and upper respiratory tract.
Causes severe eye irritation. Symptons of exposure may include burning
sensation, coughing, wheezing,laryngitis, shortness of breath,headache,
nausea and vomiting. It also may cause allergic reactions as well as derma-
titis and pulmonar edema.
Chronic effects: Carcinogenic, damage to kidneys.
Laboratory experiments have shown mutagenic effects.
Use of aldehydes in general must be performed in very well ventilated areas or
in hoods.
Hope it helps

Moris S. Eisen
Department of Chemistry
Technion-Israel Institute of Technology
Israel
chmoris@techunix.technion.ac.il
 
Newsgroups: sci.chem,sci.engr.chem
From: ckp@netcom.com (Charles Pooley)
Subject: C60, melting point?
Keywords: C60 melt liquid fullerene
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Mon, 9 Nov 1992 16:43:55 GMT

Has anyone heard of a report of the melting point for C60 or any of the
fullerenes?  Or triple point, or vapor pressure at temperatures to 2000K?
(I do subscribe to the Bucky News Service, but so far have seen no ref-
erence to melting...)
      A post, or, better, Email to me would be much appreciated. 
-- 
Charles Pooley                  ckp@netcom.com    GEnie  c.pooley
EE consultant, Los Angeles, CA
Newsgroups: sci.chem
From: mggan@uxa.ecn.bgu.edu (Gregory A. Nelson)
Subject: Re: peroxides/explosions
Organization: Educational Computing Network
Date: Thu, 5 Nov 1992 19:48:46 GMT

	You may want to check into the expolosion that occured in
1983 I believe at the Ottawa, Illinois site also known as LinMar
site for Borg-Warner chemicals.  This is a plastics plant now 
known owned by G.E. Plastics.  They had a CHP tank get out of control
and blow the walls out of the building.  The explosion killed three,
and permanently disfigured three.  Two of the victims that lived are
currently employed at the plant.  For more information or leads, you 
can contact the plant at 1-815-434-7000.  This will connect you to
the gatehouse/operator.  You may ask to be connected with the plant's
environmental engineer as a place to start.  
	By the way, the court settlement took a great deal of time,
but the injured parties finally received some compensation.

Newsgroups: sci.chem,sci.bio,sci.engr.biomed,bionet.sci-resources
From: mikemac@jupiter.sun.csd.unb.ca (Mike MacDonald)
Subject: Looking for info on aldehydes
Followup-To: mikemac@unb.ca	
Organization: University of New Brunswick
Date: Tue, 10 Nov 1992 02:13:44 GMT

I have a close friend who has been quite ill lately, it appears that it may
be related to a low level exposure to one or more of the following aldehydes.

   1) propionaldehydes
   2) acetaldehydes	
   3) 2-methylbuteraldehydes
   4) 2-methylpentaldehydes

She is keenly interested in talking to someone (telephone style) who knows 
anything about the long term low level exposure to any and/or all of the above.

Michael J. MacDonald
Senior Systems Specialist
Faculty of Computer Science
University of New Brunswick
P.O. Box 4400 
Fredericton NB Canada E3B 5A3

Phone (506) 453 4566
Fax   (506) 453 3466
Newsgroups: sci.chem,sci.engr.chem
From: valdes+@CS.CMU.EDU (Raul Valdes-Perez)
Subject: reactions as matrices?
Organization: Carnegie Mellon University
Date: Wed, 11 Nov 1992 22:01:12 GMT

Does anyone know who was the first to represent sets of
chemical reactions as matrices?  A reference would be appreciated.

-- 
Raul E. Valdes-Perez		    valdes@cs.cmu.edu
Carnegie Mellon University	    (412) 268-7127