HDTenEightyP/NetNews huggingface dataset:
From: s9874194@phobos.ucc.umass.edu (s9874194)
Subject: Re: the TRUTH about Methylene Chloride
News-Software: VAX/VMS VNEWS 1.41    
Organization: University of Massachusetts, Amherst
Date: Thu, 27 Aug 1992 12:24:00 GMT

In article <BtMJ3q.L82@wsrcc.com>, alison@wsrcc.com (Alison Chaiken) writes...
>For a while in grad school I was trying a project which involved using
>methylene chloride to dissolve scotch tape (don't ask why).  As a
>solid-state physicist, I am nearly completely ignorant of practical
>chemistry, so I took the warning labels on all the solvents very
>seriously.  The methylene chloride one terrified me; it was clearly
>rated as much more dangerous than TCE or toluene!  The label said that
>one should _shower_ and change clothing after using the stuff!  I wore
>shoulder-length rubber gloves and a labcoat and goggles while using it
>in the hood.
> 
>Then one morning on the news I heard that the FDA was considering
>banning methylene chloride as a major constituent of hairspray!!!
>Yes, all our worst fears about hairspray confirmed: it's really scotch
>tape, methylene chloride, and freon! [  ;-) Warning: last statement
>intended to be humorous, not accurate.  ]   
> 
>If you don't believe this story, try looking at the labels on some
>containers of hairspray in the supermarket.  Nowadays most of them
>say, "Does not contain methylene chloride."
> 
>What other hazardous chemicals do cosmetics contain?  I wouldn't be
>surprised if they are a whole bunch of 'em, rabbit tests or no.
> 
>-- 
>Alison Chaiken 				alison@wsrcc.com
>(510) 422-7129 [daytime] 		or chaiken@cmsgee.llnl.gov
>(510) 422-7300 [FAX]
>Live fast, die young, leave a long publication list.
I am a damned Chemist. I never wear mask or long gloves when I deal with
methylene chloride. I never take the lables on the bottle seriously. The
chemical companies have to put some labels on, otherwise they will not be
able to sell it. I remember once a label said the chemical is "strong
oxidant, strong reductant..." Do you believe that? After all, if you do not
like methylene chloride, we can supply you some DICHLOROMETHANE if you
like. The elevators in our school prohibit chemicals, even HYDROGEN OXIDE!
Daniel
S9874194@uccvax.ucc.umass.edu
From: vsummers@polaris.cv.nrao.edu (Vince Summers)
Newsgroups: sci.chem
Subject: Re: He who laughs last... was Re: Let's have a laugh
Date: 27 Aug 92 13:20:42 GMT
	<1992Aug15.035241.2924@news.Hawaii.Edu>
	<1992Aug25.165816.6988@ucsu.Colorado.EDU>
Organization: National Radio Astronomy Observatory

In article <1992Aug25.165816.6988@ucsu.Colorado.EDU> knapp@spot.Colorado.EDU (David Knapp) writes:

   Newsgroups: sci.chem
Path: cv3.cv.nrao.edu!uvaarpa!darwin.sura.net!wupost!uunet!boulder!ucsu!spot.Colorado.EDU!knapp
   From: knapp@spot.Colorado.EDU (David Knapp)
   Sender: news@ucsu.Colorado.EDU (USENET News System)
   Nntp-Posting-Host: spot.colorado.edu
   Organization: University of Colorado, Boulder
   References: <1992Aug5.060704.24409@usenet.ins.cwru.edu> <1992Aug15.035241.2924@news.Hawaii.Edu>
   Date: Tue, 25 Aug 1992 16:58:16 GMT
   Lines: 25

   In article <1992Aug15.035241.2924@news.Hawaii.Edu> belli@uhunix.uhcc.Hawaii.Edu (Jack Belli) writes:
   >  Are we forgetting one of the first things one learns as a synthetic chemist?
   >Namely,if you can buy something at a reasonable price and in the required
   >purity then don't bother making it.I would suggest a visit to the nearest lab
   >with an AA and filling your balloons,garbage bag or whatever with reagent
   >grade 
   >N2O  then have a gas..........................


   I would like to just add that this is a great way to have your *last* laugh.
   Many people die each year from suffocation resulting from using this bag
   technique.  Some die because they pass out from the nitrous oxide, then
   have their face buried in the bag.  Two hospital janitors from my home
   state died *at the same time* because they had both inhaled the latex
   gloves they were taking tokes out of.

   Perhaps you could use a rigid container; nitrous under glass?  In any case,
   think before you do that kind of stuff.


   -- 
   David Knapp                                      University of Colorado, Boulder
   Highly Opinionated, Aging  and                      knapp@spot.colorado.edu
   Perpetual Student of Chemistry and Physics.
	       Write me for an argument on your favorite subject.

     I would like to echo that.  Here in Virginia at Martha Jefferson Hospital
a patient died because the anaesthetist slipped in providing that instead
of proper breathing gas.

Vince Summers
vsummers@polaris.cv.nrao.edu
Newsgroups: sci.chem,sci.engr,sci.engr.chem,sci.environment,sci.physics
From: tony2@prefect.uucp (21131-gozdz)
Subject: Re: ppbv -> mg/m**3
Organization: Bellcore, Livingston, NJ
Date: Wed, 2 Sep 92 23:30:34 GMT

In article <1992Sep2.150248.1@woods.ulowell.edu> tinov@woods.ulowell.edu writes:
>I am trying to convert from parts per billion by volume (ppbv)
>of Sulfur Dioxide (SO_2) to milligrams per cubic meter assuming
>dry air and normal surface temperature and pressure, say 20 deg C
>and 1013.25 mb.
>
                 [thanks deleted]

Let's see; 1 m3 is 1000x1000x1000=10^9 mm3,
so 1 mm3 of SO2 in 1 m3 of air happens to be 1 ppbv.
The FW of SO2 is 32+16+16=64 g/mol = 64,000 mg/mol, 
and it occupies 22.4 (more or less) dm3 under std. p & T, 
which is 22.4x100x100x100 mm3 = 2.24x10^7 mm3.
Its density under std. p & T is thus 
64,000/(2.24x10^7) mg/mm3 =2.86x10^(-3) mg/mm3, right?
So, if you happen to have 1 ppbv of SO2 in 1 m3 of air,
its concentration is just that, 2.86x10-3 mg/m3.
At 20oC you will have a little less of it
(273/293x2.86x10^(-3) = 0.00266 mg/m3. 

Wow! The last time I had to that kind of homework,
somebody was taking "a little step" on a far-away globe...
Hope I got it right this time, the flames feel hotter
now than then... Or maybe it's just the global warming due
to all that SO2?

Tony

-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Antoni S. Gozdz                tel  (908) 758-2931  |  Bellcore  NVC 3X-261
tony2@prefect.cc.bellcore.com  FAX  (908) 741-2891  |  Red Bank, NJ 07701, USA
-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Newsgroups: sci.chem
From: nonbs%Solomon.Technet.sg (Ng Ban Seng)
Subject: 1
Organization: National University of Singapore
X-Newsreader: Tin 1.1 PL5
Date: Fri, 28 Aug 1992 01:14:02 GMT
From: James_J_Kowalczyk@cup.portal.com
Newsgroups: sci.chem
Subject: Re: Organic Models Kit:  How helpful?
Date: Tue,  1 Sep 92 20:46:24 PDT
Organization: The Portal System (TM)
  <1992Aug29.220610.169722@zeus.calpoly.edu>

chrism@col.hp.com (Chris Magnuson) writes:

>  How helpful are the plastic beads model kits for learning organic chemistr
>Would computer modeling programs be better?  If so, can someone recommend on
>for the Mac?
>
>Thanks in advance,
>chrism@col.hp.com

Every organic chemist should (and probably does) own a model kit.
Building a model can be invaluable in considering a structure.
Computer modelling has its uses, obviously, but there is nothing
quite like building a model of a molecule and holding it in your hand,
twisting it around, tossing it in the air, etc., to give you a real
"feel" for the compound. :)

Jim Kowalczyk             James_J_Kowalczyk@cup.portal.com
Sr. Research Chemist
Eisai Research Institute
Andover, MA 01810
From: paul_tarantino@jhuapl.edu (Paul Tarantino)
Newsgroups: sci.chem
Subject: Re: chemistry ftp sites
Date: 3 Sep 92 17:14:43 GMT
Article-I.D.: til-pst-.paul_tarantino-030992131353
Followup-To: sci.chem
Organization: JHU Applied Physics Laboratory

I would also appreciate receiving info regarding an FAQ and FTP sites.
Thanx,
Paul T.
Newsgroups: sci.chem
From: wjc@ll.mit.edu (Bill Chiarchiaro)
Subject: Silicone
Originator: wjc@ll.mit.edu (Bill Chiarchiaro)
Organization: MIT Lincoln Laboratory, Lexington MA
Date: Thu, 27 Aug 92 20:13:49 GMT



  Could someone tell me the chemical or structural formula of
Silicone?

  Please reply via email; I'll post a summary.


Thanks,

Bill Chiarchiaro
wjc@ll.mit.edu
Newsgroups: sci.chem
From: gmk@pegasos.ccsr.uiuc.edu (Gottfried Mayer-Kress)
Subject: Research student for Belousov-Zhabotinski experiment wanted
Reply-To: gmk@pegasos.ccsr.uiuc.edu (Gottfried Mayer-Kress)
Organization: University of Illinois at Urbana
Date: Wed, 2 Sep 1992 20:44:38 GMT

The experiment is basically set up, we need someone with background in 
chemistry and computer control/analysis for doing exciting experiments on
Control of Chaos in the BZ reaction.

--
Gottfried Mayer-Kress
Center for Complex Systems Research, Department of Physics
3025 Beckman Institute, 405 N Mathews, Urbana, Il 61801
gmk@pegasos.ccsr.uiuc.edu (NeXT-Mail)
gmk@goshawk.lanl.gov, gmk@santafe.edu 
(217)-244-5877 (voice/fax modem),x8371(fax), x1994 (msg)
From: kkniaz@eniac.seas.upenn.edu (Krzysztof W. Kniaz)
Newsgroups: sci.chem
Subject: Bucky News Service
Keywords: Buckyballs
Date: 26 Aug 92 18:46:03 GMT
Organization: University of Pennsylvania

For those of you, who don't know about, or want to subscribe to,
the Bucky News Service, I'm posting an intro from the last issue

		Welcome to the Bucky News Service


Below is the rapid dissemination list of titles from the bucky news service,
which has six capabilities whose names are more or less self-explanatory: 
INTRO, SUBSCRIBE, UNSUBSCRIBE, SUBMISSION, UPDATE, and BIBLIO.

The syntax for using the service is e-mail to bucky@sol1.lrsm.upenn.edu,
the message consisting of one of the above keywords (note capitals) 
on an otherwise blank line.  
Some keywords/capabilities allow additional text on subsequent lines.
A complete guide to the service can be obtained using INTRO with the
syntax above. Note that when you UPDATE one of your previous submissions,
you must refer to the bucky code number (e.g. @#47).   Also, the keepers 
of bucky would love to know the actual submission date to a journal.

--

Krzysztof Kniaz, University of Pennsylvania | If you can't learn  
Lab for Research on the Structure of Matter | to do it well,
Philadelphia, PA, 19104, USA                | learn to enjoy doing it badly.
Newsgroups: sci.chem,sci.physics
From: rzepa@cc.ic.ac.uk (Henry Rzepa)
Subject: Re: INDO/Zerner's INDO calculations
X-UserAgent: Nuntius v1.1.1d9
X-XXMessage-ID: <A6CC324E6B0150FD@macb.ch.ic.ac.uk>
Organization: Department of Chemistry, Imperial College
Date: Thu, 3 Sep 92 21:21:42 BST
X-XXDate: Thu, 3 Sep 92 21:21:18 GMT

Two comments. The Zerner ZINDO code is fairly SUN specific. We
had a lot of trouble porting to SGI Indigo!

And the CAChe version is a subset of the Zerner code, as well as
having smaller dimensions
>
_____________________________________________
|  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 1.3b46.                 
_____________________________________________
Newsgroups: sci.chem
From: tem1@ra.msstate.edu (Tim Miller)
Subject: Re: chemistry ftp sites
Organization: Mississippi State University
Date: Mon, 31 Aug 1992 21:15:43 GMT

Ross Druker <RS0VRD@rohvm1.rohmhaas.com> writes:

>Hi,
>Can you tell me if there are ftp sites that specialize in chemistry or
>chem eng. software or information?

>Ross Druker
>Rohm and Haas Co.
>rs0vrd@rohmhaas.com

Could someone please post that information on this board or mail me a copy
of the information as well.  Our research is kinda stalled here for lack
of software.  I would greatly appreciate it.

Tim Miller
Miss State Univ
From: grayson@hougen.seas.ucla.edu (David A. Grayson)
Newsgroups: sci.chem
Subject: Alcohol derivitization (adding 3,5-Dinitrobenzoate)
Date: 26 Aug 92 22:48:42 GMT
Distribution: na
Organization: SEASnet, University of California, Los Angeles


I am trying to derivatize the hydroxyl group of 1-tetralol (not a true
glycol, but the technique I have adopted is commonly used for glycols).

1-tetralol is 1,2,3,4 -tetrahydronaphthol. I use methylene chloride
as my delivery solvent. (3.27 mg in 2 mL CH2Cl2) 

The reaction takes place in pyridine.

I use 30 ml pyridine with 0.5 g of 3,5-Dinitrobenzoyl chloride (DNB-Cl) and
add ~ 1 ml of the 1-tetralol/methylene chloride solution to it. Heat this
mixture (w/stirring) to 60 C for 15 minutes.

Here is my problem. I can't get this heated solution to pH 2.5. I get down to
about 4.8 and then nothing. Does anyone see a likely suspect as my acid
sink? I wouldn't worry about it, but I am adding so much HCl, that I seem
to be forming some sort of floating ppt.. 

I know about the problems of pHing an organic solution, but by the time I 
finally gave up the last time. I had gone from ~30 mL organic to ~80mL 
total volume. Greater than 2% aqueous solution (50 mL of HCl ~60%) should be 
enough to let any pH meter work. The 50 mL of HCl added were done as follows
10 mL 1N HCl, 30 mL 5N HCl, and then 10 mL concentrated HCl. 

I took this method from M.A. Carey and A.F. Persinger, J. Chromatogr. Sci.,
vol. 10, page 537 (1972). It can also be found in the Handbook of
Analytical Derivatization Reactions by Daniel R. Knapp, John Wiley
& Sons pages 41 & 97 (1979).


thanks for any and all help

dave

--
UCLA, Dept. Chem. Eng., 5805 Boelter Hall, LA, CA 90024
David A. Grayson                  grayson@seas.ucla.edu
Newsgroups: sci.chem
From: knapp@spot.Colorado.EDU (David Knapp)
Subject: Here it is.  was Re: Merck Index
Organization: University of Colorado, Boulder
Date: Thu, 27 Aug 1992 03:57:40 GMT

In article <h-bnk_d@lynx.unm.edu> pkrause@triton.unm.edu (Paul Krause CIRT) writes:
>
>I would like to know of an address which i could send an inquiry to as to buyinga Merck Index.  I was hoping that one of you could e-mail me, or post the
>publisher's address.  A science teacher at my son's school would like one, as 
>the school doesn't have one currently.  I do have one, but I am not totally
>sure that the address in it for the general direction for the publisher is 
>correct anymore (it is a 7th edition).
>Thanks.
>Paul
>pkrause@triton.unm.edu


Merck and Co., Inc
P.O. Box 2000
Rahway, N. J. 07065

(201) 885-4558



-- 
David Knapp                                      University of Colorado, Boulder
Highly Opinionated, Aging  and                      knapp@spot.colorado.edu
Perpetual Student of Chemistry and Physics.
            Write me for an argument on your favorite subject.
From: dfield@zeus.calpoly.edu (Daniel R. Field)
Newsgroups: sci.chem
Subject: Structure of nonoxynol-9 wanted
Keywords: nonoxynol-9, structure, search, database
Date: 28 Aug 92 01:30:52 GMT
Organization: California Polytechnic State University, San Luis Obispo


     At the ACS national meeting in San Francisco, several representatives
from the chemical databases (STN, Dialog...) attempted to help me find
the structure of nonoxynol-9, the common over-the-counter spermicide, but
to no avail.  
     If anyone could direct me to the appropriate resource to find this
structure, I would appreciate it.  If you could e-mail me the diagram,
I would be very happy.  A mailed photocopy of the diagram would be
cherished! :)    That could go to: Dan Field, P.O. Box 13932, 
San Luis Obispo, CA 93406-3932
     Thanks!  Any help appreciated!

                             -Dan Field
                              dfield@nike.calpoly.edu

-- 

                                -Daniel R. Field
                                 dfield@nike.calpoly.edu
Newsgroups: sci.chem
From: chrism@col.hp.com (Chris Magnuson)
Subject: Organic Models Kit:  How helpful?
Date: Sat, 29 Aug 1992 19:23:35 GMT
Organization: HP Colorado Springs Division

  How helpful are the plastic beads model kits for learning organic chemistry?
Would computer modeling programs be better?  If so, can someone recommend one
for the Mac?

Thanks in advance,
chrism@col.hp.com
Newsgroups: sci.chem
From: carpenne@cda.mrs.umn.edu (Nancy E. Carpenter )
Subject: Analytical Chemist Opening
Organization: University of Minnesota - Morris
Date: Thu, 3 Sep 1992 17:08:06 GMT


Due to a recent and unexpected retirement, the following position has 
recently opened:
ANALYTICAL CHEMIST.  Temporary position beginning January 1993 at the 
University of Minnesota, Morris.  Duties: teach Instrumental Analysis in
winter and analytical chemistry in spring.  Scholarly research and some
service responsibilities are expected.  Appointment at Assistant
Professor level for Ph.D., Instructor for others.  Salary negotiable.
Tenure-track search expected later.  Minimum qualifications:  M.S. or
M.A. in chemistry with analytical background and one year teaching 
experience (graduate T.A. experience acceptable).  Ph.D. in analytical
chemistry and excellence in teaching preferred.  Send application,
resume, transcripts and three reference letters via U.S. mail to:  Dr. 
Michael Korth, Chair, Division of Science and Mathematics, University
of Minnesota, Morris; Morris, MN  56267-2128 to arrive by October 23,
1992.  The University of Minnesota is an equal opportunity educator and
employer.

Newsgroups: sci.chem
From: saj@chinet.chi.il.us (Stephen Jacobs)
Subject: Re: the TRUTH about Methylene Chloride
Summary: I like evidence of a threat before I regulate it.
Organization: Chinet - Public Access UNIX
Date: Thu, 27 Aug 1992 14:11:31 GMT

In article <1992Aug27.061756.6719@magnus.acs.ohio-state.edu> ANDERSONC@kcgl1.eng.ohio-state.edu (Chris Anderson) writes:
>Allison Chaiken asks a good question:  what other toxic chemicals do
>cosmetics contain?
>
>In OHIO on November 3rd, voters will be able to cast votes for the
>right to know when they're being exposed to chemicals that are known
>to cause cancer or birth/reproductive defects.  The proposal is issue
>5 on the ballot and was placed there by OHIO TOXIC ACTION which is
>a project of the consumer group OHIO CITIZEN ACTION.
>
>The law deals with 458 known carcinogenic/mutagenic chemicals and only
>requires warnings on products that pose a significant risk.  A very
>similar law was enacted in CALIFORNIA in 1986 as PROPOSITION 65.
>
Last I heard, California regulators were starting to get kinda nervous about
a court decision that the law meant exactly what it said, and that as a
consequence, orange juice (for instance) couldn't be added to anything else
without a warning label (orange juice is a major source of acetaldehyde, 
which just made the Prop 65 list).  (The law exempts materials naturally
occurring in a food, but when you add something to something else, it
kicks in).

The harder you look at lists of carcinogens/mutagens the less useful these
laws seem.  They tend to be heavy with things like chromium VI (never
conceivably useful, or for that matter deliverable in a consumer product),
aflatoxins (never intentionally present in anything except analytical
standards, and regulated as all getout) and tannins (some of them are 
probably harmful, but they're real hard to characterize, and some of them 
are characteristic of coffee and tea (and a few other nice things).  

There are doubtless SOME cases of cancer induced by the things named on 
such lists.  I like, personally, to have epidemiology as a guide to what's
important enough to worry about, and it certainly doesn't raise any red
flags concerning low-lwvwl exposures to the chemicals of technology.
If society is going to spend X dollars (with X on the order of a billion)
to remove a risk, I think it's reasonable to want it to be a measurable 
risk (don't tell me industry is going to pay.  The mony comes from people
at large, no matter who ultimately spends it).  And there are plenty of
measurable risks out there.
                                      Steve
Newsgroups: sci.chem
From: dietz@cs.rochester.edu (Paul Dietz)
Subject: Re: Entropy of the Universe, (was Re: Genesis - fact or fiction)
Organization: Computer Science Department University of Rochester
Date: Tue, 25 Aug 1992 20:52:24 GMT

In article <3759@fcs280s.ncifcrf.gov> toms@fcs260c2.ncifcrf.gov (Tom Schneider) writes:

>>     Why try to prove a theory by citing another theory, the RNA one?
>
> The RNA hypothesis explains the old problem of what compound came first
> DNA or protein?  If RNA could replicate, that puzzle is solved.  It leaves
> the problem of the generation of the bases of RNA and their initial linking.


Unfortunately, this seems to require precise catalysis -- i.e.,
enzymes, or proteins -- to make the pure monomers.  So no problem is
solved.  The making of RNA from "primordial soup" appears to face
insurmountable problems.  For example, ribose in neutral solution at 25
C isomerizes to (mostly) other pentoses within weeks; also, the
production of ribose from formaldehyde is inefficient (< 1% yield, at
best) and even this process is poisoned by the presence of cyanide,
which is necessary for making the bases.  The cyanide rapidly
and efficiently reacts with formaldehyde to yield glycolic acid.
Moreover, note that RNA replication is jammed by the presence
of nucleotide stereoisomers.

	Paul F. Dietz
	dietz@cs.rochester.edu
Newsgroups: sci.chem
From: aankrom@nyx.cs.du.edu (Anthony Ankrom)
Subject: 1,4-dichloro-2-butyne
Organization: Nyx, Public Access Unix @ U. of Denver Math/CS dept.
Date: Thu, 3 Sep 92 03:25:55 GMT


 I need to know a facile synthesis for 1,4-dichloro-2-butyne. Please post
or e-mail...

St. Anthony

--
 If mail barfs, send it to the ip #: aankrom@130.253.192.68   

                       dAdaMatriX
      I've lost my memories to all my fears...
Newsgroups: sci.chem
From: aankrom@nyx.cs.du.edu (Anthony Ankrom)
Subject: Re: Luminescent Paint (Q)
X-Disclaimer: Nyx is a public access Unix system run by the University
	of Denver for the Denver community.  The University has neither
	control over nor responsibility for the opinions of users.
Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept.
Date: Sun, 30 Aug 92 06:06:06 GMT

In article <2a9e61b8wnr070@ark.abg.sub.org> ralf@ark.abg.sub.org (Ralf St
phan) writes:
>knapp@spot.Colorado.EDU (David Knapp) writes:
>> 
>> ZnS comes to mind.
>
>That leads me to the question:  Does ZnS alone suffice?  I remember tryi
g
>it as a boy, and I think I also "doped" it with traces of some metal but
>I never succeded.  Of course one needs an UV lamp for that?
>
>--ralf


 I thought ZnS used Radium to illuminate it...


--
 If mail barfs, send it to the ip #: aankrom@130.253.192.68   

                       dAdaMatriX
      I've lost my memories to all my fears...
Newsgroups: sci.chem