HDTenEightyP/NetNews huggingface dataset:
From: boozer@gallant.apple.com (Chuq Von Rospach)
Newsgroups: sci.chem
Subject: Where can I get basic science equiptment for school age children?
Keywords: catalogs
Date: 24 Nov 92 01:12:03 GMT
Organization: I is a writur


Where can I get the basic science [physics/chemestry] equiptment for teaching
grade school children?

Addresses of places in the San Francisco 
Addresses of mail-order companies

Glenn Boozer
Boozer@apple.com
Newsgroups: sci.chem
From: dionc@ireq.hydro.qc.ca (Claude Dion ETUDIANT sept-dec 92)
Subject: Graduate studies
Organization: Institut de recherche d'Hydro-Quebec, Quebec, Canada
Date: Wed, 18 Nov 1992 23:30:12 GMT

I'm currently studying chemistry at the Universite de Sherbrooke
and I'm looking for a place to pursue graduate studies (I will
finish my Baccalaureat in december 1993).

I am interested in theoritical chemistry, primarily quantum
chemistry and molecular modeling.  If you are a professor who's
research is in those areas, a student of one of those professors,
or someone who recently received their Ph.D., I would like to
know which are the best universities _and_ the best professors,
either in Canada, the US or even Europe.

If you are a professor, I would like to receive a brief description
of your research (e-mail correspondance would follow if I am
interested).

Thank you for your time.

Please e-mail to dionc@ireq.hydro.qc.ca

Claude Dion
Newsgroups: sci.chem
From: rajat@sunny3.che.clarkson.edu (Rajat Kapoor,P303,2124)
Subject: Gold - future Auto Catalyst
Organization: Clarkson University
Date: Mon, 16 Nov 1992 19:34:03 GMT

From article <1992Nov14.173858.2562@ucsu.Colorado.EDU>, by knapp@spot.Colorado.EDU (David Knapp):
> 
> 
> If anyone here has worked with CO oxidation catalysts, gold is a rather
> good one, and freely trades oxygen and CO from its surface. The CO adsorbed
> surface is a grayish/purple and this is the color of a 'deactivated' 
> surface.
> 

One of the unfortunate fallouts, IMHO, of the above reaction is that the
Japanese plan to use Au as one of the active materials for catalytic
convertors. 

This was conveyed by a researcher from GIRIO ( Govt. Instt... Osaka)
who gave a seminar here on the topic.

Economically, it makes sense - gold is cheaper today. However, in my
opinion this is unfortunate. Gold has a charm like no other metal.
Putting this in ceramic monoliths would make it practically irrecoverable.

By the same count, I don't like the idea of Gold being used as a
filler material for teeth.  Unless it is removed after death, that gold
would be taken off "circulation".

In either of the above cases the quantity is substantial if numbers
are taken into account.

Next on the list : Gold as conductor for IC's.

Kapoor

PS  I know tons of gold have been buried in the high seas,but, sooner
or later we'll find it and bring it back into circulation.
Newsgroups: sci.chem
From: rajat@sunny3.che.clarkson.edu (Rajat Kapoor)
Subject: Golden Statement : Dark Humor 
Organization: Clarkson University
Date: Wed, 18 Nov 1992 01:26:56 GMT

> 
> By the same count, I don't like the idea of Gold being used as a
> filler material for teeth. 

On the lighter side...

Once, showing extensive dental work done with Gold, my Boss had boasted :

               
			   " I'm more worth dead than alive "



>:)    

*Just when you thought your Boss/Advisor was overbearing and unbearable*

>:)    ;-))



Newsgroups: sci.chem
From: kapb9@syma.sussex.ac.uk (Robin Harrison)
Subject: UNUSUAL CHEMISTRY JOBS
Organization: University of Sussex
X-Newsreader: Tin 1.1 PL4
Date: Tue, 17 Nov 1992 14:22:14 GMT

      Through an OUTREACH programme at the University
of  Sussex,   we are trying to promote  chemistry  to
young  people by travelling to regional  schools  and
colleges to give lectures and demonstrations.  It  is
hoped  that  by  exposing students  to  the  fun  and
interesting  side of chemistry, we will  be  able  to
overcome   the   many   incorrect   stereotypes    of
scientists.  In  this way, we hope  to  increase  the
number  of  young  people taking up  chemistry  as  a
career, which will ultimately benefit the industry as
a whole.
     I am currently preparing a lecture and wonder if
any one may be able to help me with my research.
     The three main aims of my lecture are;
i) To show that the "mad scientist" stereotype is not
a fair one.
ii)  Many  jobs in chemistry do not revolve around  a
typical  lab.  I would like to get across  that  many
chemists  work  out  in the field,  often  in  rather
unusual places.
iii)  A  career in chemistry is both interesting  and
rewarding.
     Are there any chemists out there who have
interesting research jobs which might be of interest
to young students - the more unusual the better!
Alternatively, if anybody has references to books or
articles of any interesting chemistry that may be
applicable, they would also be of interest.
     On a more general level, if anybody has any nice
ideas on how to promote chemistry to kids (14 years
and up), I would also be pleased to hear them. This
may be anything from a nice chemical demonstration to
a novel lecture theme, as we are continuously trying
to find new ideas for our presentations.
     I can be contacted either by post or email if
you feel you have any relevant material.
     Thank you in advance for your help.

Robin Harrison.

School of Chemistry,
University of Sussex,
Falmer,
Brighton. BN1 9QJ.
England
Email: kapb9@sussex.central.ac.uk


Newsgroups: sci.chem
From: lordj@vccsouth17.its.rpi.edu (Joel Patrick Lord)
Subject: Re: Methylene Dichloride
Reply-To: lordj@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Distribution: sci.chem
Date: Thu, 19 Nov 1992 04:45:44 GMT

   Methylene Chloride CH2Cl2 is the active ingredient in paint
removing compounds.  It isn't pure in any way, and is only really
useful for removing paint, varnish, or skin.

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: gay@selkirk.sfu.ca (Ian D. Gay)
Subject: Re: Catalytic converters for cars - good or bad?
Keywords: Catlytic, ecology, greenhouse effect
Organization: Simon Fraser University, Burnaby, B.C., Canada
Date: Thu, 19 Nov 1992 01:08:50 GMT

arc5@chempc0.york.ac.uk (Alastair Cargill) writes:

>Hi

>I have long wondered about the balance between the good a catalytic 
>converter does whilst in use on a car and the damage done to the environment 
>as a whole involved in its production in the first place.
>To make a catalytic converter involves the use of very rare and presumably 
>hard to get at maetals such as rhodium and platinum and therefore to extract 
>them from the rock/ore/whatever must be very energy intensive and must 
>surely produce a lot of polution in this way. 

I don't think this is a major consideration. Most of the noble metals 
are recovered from ores which have been processed for more common 
metals, such as Ni and Cu, and the extra energy expenditure should be 
relatively small. Sorry, I don't have any hard figures.
Newsgroups: sci.chem
From: mroussel@alchemy.chem.utoronto.ca (Marc Roussel)
Subject: Re: Gold - future Auto Catalyst
Organization: Department of Chemistry, University of Toronto
Date: Mon, 16 Nov 1992 22:35:02 GMT

In article <1992Nov16.193403.16355@news.clarkson.edu>
rajat@sunny3.che.clarkson.edu (Rajat Kapoor,P303,2124) writes:
>One of the unfortunate fallouts, IMHO, of the above reaction is that the
>Japanese plan to use Au as one of the active materials for catalytic
>convertors. 
[...]
>Gold has a charm like no other metal.
>Putting this in ceramic monoliths would make it practically irrecoverable.
>
>By the same count, I don't like the idea of Gold being used as a
>filler material for teeth.  Unless it is removed after death, that gold
>would be taken off "circulation".
>
>In either of the above cases the quantity is substantial if numbers
>are taken into account.
>
>Next on the list : Gold as conductor for IC's.

     At least in this last application, the gold is recoverable.  In
fact, there are companies in operation today whose sole purpose is to
recover gold from circuit boards.  I will certainly agree that, due to
human superstition, it's not likely we'll be recovering gold from
graveyards anytime soon.  However, you shouldn't underestimate our
ability to get around difficult extractive problems when necessary:  If
ever we needed it again, we would find a way to get it out of catalytic
converters.
     These observations are however not the reason I am posting.  I would
like to know if anyone else thinks that Rajat's posting is silly.  (I
tried to find a more tactful term, but I couldn't.)  First of all, I
haven't heard that there is anything even remotely resembling a gold
supply crisis.  Secondly, gold makes pretty jewelry, but so what?  I
would rather have it play a useful technological role than see it wind
up as a useless ornament.  Am I the only one with this sort of opinion?

				Marc R. Roussel
                                mroussel@alchemy.chem.utoronto.ca
From: tom@cpac.washington.edu (Tom May)
Newsgroups: sci.chem
Subject: Homemade bubble bath == ?
Date: 21 Nov 92 05:07:39 GMT
Article-I.D.: bailey.TOM.92Nov20210739
Organization: Center for Process Analytical Chemistry, UW

A friend of mine, in an attempt to make bubble bath, did the following:

Bought some environmentally nice laundry soap powder
Mixed up some alcohol and glycerine
Dumped some powder into the mixture
Added hot water

At this point the whole thing foamed uncontrollably for several
minutes, and the alcohol and glycerine reportedly seemed to separate
out leaving some very hard, glassy, long, sharp crystals (+ water?) in
the bottom.  The crystals dissolve fairly quickly in water.  Anybody
got any idea what went on here, and what the crystals might be?  I've
got no idea what the laundry soap was, and she did say soap, not
detergent (she probably wouldn't try to make bubble bath out of
detergent).

Thanks for any clues.

--
Tom.
From: whitbeck@equinox.unr.edu (Michael Whitbeck)
Newsgroups: sci.chem
Subject: Re: Gold dust a fire hazard?
Date: 16 Nov 92 19:02:56 GMT
Organization: University of Nevada, Reno

In article <1992Nov13.190703.29238@news.clarkson.edu> rajat@sunny3.che.clarkson.edu (Rajat Kapoor,P303,2124) writes:
>From article <1992Nov12.221840.13881@ncsu.edu>, by jrkitchi@eos.ncsu.edu (JOHN ROBERT KITCHIN):
>> 
>> 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
>
>In my opinion, flammibility of fine powders is more of a heat transfer
>effect than the conventional "hi surface area = hi energy" theory.
I am sure heat transfer is an important
consideration however if the change in energy is
not there then the reaction will not proceed. The
main failing of most of the postings on this topic
has been the neglect of surface area on the
chemical potential.

Once it is established that delta-G for the
reaction (of size 's' particles) is favorable then
kinetic, including heat transfer, considerations
may be applied to see if the thermodynamically
allowed reaction is also probable from a kinetic
viewpoint.

Personally I would be surprised (make that
*shocked*) if there is any metal that will not
spontateously combine with oxygen (in air)  once
reduced to sufficiently small size (like
atomized!).

just my 2 cents... Mike W.
From: an881@cleveland.Freenet.Edu (Dick Middaugh)
Newsgroups: sci.chem
Subject: Re: Need info on rechargable NiCd batteries...
Date: 18 Nov 1992 02:12:41 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: slc10.ins.cwru.edu


Only under carefully controlled conditions can a memory effect be
observed in current NiCad batteries.  The effect has been pretty
well engineered out of them, but the folklore persists.
-- 
Compuserve:  71077,1676
Rocky River, OH  USA
Newsgroups: sci.chem
From: uchpcjv@Msu.oscs.montana.edu
Subject: Re: GRE Studying Tips?
Reply-To: uchpcjv@Msu.oscs.montana.edu
Organization: Montana State University
Date: Mon, 23 Nov 1992 22:41:27 GMT

In article <1992Nov23.213847.11843@news.cs.brandeis.edu>, st891425@pip.cc.brandeis.edu (Andrew Weiskopf) writes:
>Well, I've done pretty well on the general exam- but the subject exam is soon
>approaching (December 12). So, in preparation, I've dusted off my old 
>notebooks, pulled out my texts, and bought a book of GRE "Model" exams.
>
>Studying has been going well, but is there anything that worked especially
>well for you (you, being the net-reader)? It's very important (as you can
>imagine) that I do well on this test, so your suggestions would be most
>appreciated.

The "Model" will probably be the most useful tool.  The level of questioning
as I recall was pretty "zero-order" -- maybe junior level material (?).
The inorganic/organic parts -- descriptive chemistry -- seemed very
trivia oriented.  The P-chem part was absurdly easy.  Have fun.

My .02/worth.
Newsgroups: sci.chem
From: knapp@spot.Colorado.EDU (David Knapp)
Subject: Re: Gold dust a fire hazard?
Organization: University of Colorado, Boulder
Date: Mon, 16 Nov 1992 22:10:38 GMT

In article <4843@equinox.unr.edu> whitbeck@equinox.unr.edu (Michael Whitbeck) writes:

>I am sure heat transfer is an important
>consideration however if the change in energy is
>not there then the reaction will not proceed. The
>main failing of most of the postings on this topic
>has been the neglect of surface area on the
>chemical potential.
>
>Once it is established that delta-G for the
>reaction (of size 's' particles) is favorable then
>kinetic, including heat transfer, considerations
>may be applied to see if the thermodynamically
>allowed reaction is also probable from a kinetic
>viewpoint.
>
>Personally I would be surprised (make that
>*shocked*) if there is any metal that will not
>spontateously combine with oxygen (in air)  once
>reduced to sufficiently small size (like
>atomized!).

The metal would need to have a large enough affinity to break the O2 bond
which, while not particularly strong, is not trivial.

I believe that many 'spontaneous' combustion demonstrations of finely 
divided metals are literally triggered by transient free oxygen from,
of all things, cosmic rays. I wish I could remember the article I read
this in to fend off the ensuing flames here, but I'm afraid I don't.
So sue me.


Anyway, the point of *that* is that not all metals have oxidation potentials
above the O2 bond energy. Hence, unless you have free oxygen around to 
start things off with a bit of exothermicity, no matter how finely divided
the metal is, there are some that won't 'spontaneously' oxidize.


>
>just my 2 cents... Mike W.

In the end, it is the facts that count, not the amount of money...




-- 
David Knapp                                      University of Colorado, Boulder
Perpetual Student                                   knapp@spot.colorado.edu
Newsgroups: sci.chem
From: jcastgan@nyx.cs.du.edu (Jesus M. Castagnetto)
Subject: QUESTION: Where can we buy C60?
Summary: Need to find a firm that sells C60
Keywords: C60, buckyballs, buy, research
Organization: University of Denver, Dept. of Math & Comp. Sci.
Date: Fri, 20 Nov 92 01:50:28 GMT


Hi netters!

    One of the professors in our Chemistry Department is interested in
purchasing some C60, for a research he wants to conduct. Unfortunately
he doesn't know how to connect to Usenet, so he would like that the
information you can provide be sent to:
                        wilsons@acfcluster.nyu.edu
or:
                        Stephen R. Wilson
                        Department of Chemistry
                        New York University
                        4 Washington Pl, Room 514
                        New York, NY 10003
                        U.S.A.

   Thanks 1E6 in advance for any leads you can provide. *Please*
*DO NOT* answer to this newsgroup, but to the E-mail address above
(or to mine if you like: jmc0580@acfcluster.nyu.edu).

   Best regards and a nice day for everybody.


                               Jesus M. Castagnetto
                               NYU-Dep of Chemistry
   >Preferred E-mail : "jmc0580@acfcluster.nyu.edu"
-----


Newsgroups: sci.chem
From: jrkitchi@eos.ncsu.edu (JOHN ROBERT KITCHIN)
Subject: calcium sulfate
Originator: jrkitchi@c00577-1403br.eos.ncsu.edu
Reply-To: jrkitchi@eos.ncsu.edu (JOHN ROBERT KITCHIN)
Organization: North Carolina State University, Project Eos
Date: Thu, 19 Nov 1992 14:11:53 GMT


can calcium sulfate be used as an oxidiser.  If so what is its 
decomposition temperature? thanks.
sally
From: mgqlu@ntuix.ntu.ac.sg (Max Lu)
Newsgroups: sci.chem
Subject: Re: ?HAND WARMERS ?
Date: 19 Nov 92 05:18:51 GMT
Organization: Nanyang Technological University - Singapore
X-Newsreader: TIN [version 1.1 PL6]

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?

Ciao

Max
-- 
* Max G Q Lu, PhD (Lecturer in Thermal Engineering)
* School of MPE, Nanyang Technological University
* Nanyang Avenue, Singapore 2263. (Email: mgqlu@ntu.ac.sg)
* Phone: (65) 7911744 Ext.4818     Fax: (65) 7911859
Organization: Doctoral student, Urban and Public Affairs, Carnegie Mellon, Pittsburgh, PA
From: dietz@cs.rochester.edu (Paul Dietz)
Subject: Re: Gold - future Auto Catalyst
Organization: Computer Science Department University of Rochester
Date: Tue, 17 Nov 1992 04:58:58 GMT

In article <1992Nov17.011919.14080@ucsu.Colorado.EDU> knapp@spot.Colorado.EDU (David Knapp) writes:

> It isn't difficult to get the gold out of the converter, it is hard to 
> collect all those converters from dumps, junk yards, ditches and
> quarries from around the world that is so hard. It is simply not profitable
> to run around digging converters out of the junk yard to extract a couple
> milligrams of gold from it.

On the contrary:  convertors are already being collected, to recover
platinum group elements.


 > resources come from Alcoa.  The world does *not* have an infinite supply 
 > of *any* metal that is able to be gotten by man. Think about it, while 
 > there is certainly a *lot* of metal out there, *very* little of it is 
 > accesible to use because it is either too deep or too dispersed. The amount
 > of energy that goes into refining metals is *phenomenal*.

There are metals that are widely dispersed.

There are metals on which we expend large amounts of energy
to refine.

These two classes are largely disjoint!

*Almost all* the metal we use is aluminum or iron.  Almost all the
energy expended on refining metals is on these two elements.  There
are effectively infinite supplies of both metals at concentrations
only a few times less than current ores.  In dollar volume as well,
most of the metal consumed is the low value stuff.  Even if the energy
and dollar cost of the exotic elements like gold were to skyrocket,
the total cost of metals would not increase by much.

	Paul F. Dietz
	dietz@cs.rochester.edu
From: norton@joker.optics.rochester.edu (Scott Norton)
Newsgroups: sci.chem
Subject: Methylene Dichloride
Date: 18 Nov 92 22:24:03 GMT
Distribution: sci.chem
Organization: The Institute of Optics, University of Rochester


       Question:  Does anyone know if there is a "popular" name for
methylene dichloride??  CH2Cl2  ??
   I was told it was very common and could probably be obtained at a
hardware store... so is it a paint thinner or something like that??

Thanx!
Scott
.
From: hodgeman@csd4.csd.uwm.edu (William Hodgeman Jr)
Newsgroups: sci.chem
Subject: Re: Anyone knows a book about MOs ?
Date: 20 Nov 1992 15:07:29 GMT
Organization: University of Wisconsin - Milwaukee
Reply-To: hodgeman@csd4.csd.uwm.edu
NNTP-Posting-Host: 129.89.7.4
Originator: hodgeman@csd4.csd.uwm.edu

From article <1992Nov19.164301.42567@urz.unibas.ch>, by minidis@urz.unibas.ch ( Capt.J.T. Kirk ):
> Hi,
> does anyone know of a book where MOs of heteronuclear moleculs
> are described/explained ?
>  

The book I have used, which is fairly good, is 
  Symmetry and Spectroscopy
            by
   Harris and Bertolucci

It is printed by Dover Books, and is very inexpensive (about $13.00)

It doesn't describe projection operators well enough, and
doesn't describe how to use them to generate correct MO's.
But other than that, it is the best book I have seen
yet dealing with this subject.

Bill Hodgeman   (hodgeman@csd4.csd.uwm.edu)
Newsgroups: sci.chem
From: mroussel@alchemy.chem.utoronto.ca (Marc Roussel)
Subject: Re: UNUSUAL CHEMISTRY JOBS
Organization: Department of Chemistry, University of Toronto
Date: Tue, 17 Nov 1992 19:55:31 GMT

In article <1992Nov17.142214.10463@syma.sussex.ac.uk> kapb9@syma.sussex.ac.uk
(Robin Harrison) writes:
>     Are there any chemists out there who have
>interesting research jobs which might be of interest
>to young students - the more unusual the better!

     My sister-in-law works in a fairly ordinary-looking chemistry lab,
but the "chemicals" she works with are not the sort of noxious potions
the general public generally thinks of when they think of chemistry:
She analyzes grapes for a winery.  (Well, OK, so they do use all sorts
of nasty organic solvents when they extract the grapes, but at least the
primary materials are food!)  She spends almost as much time crushing
grapes as she does washing glassware.  (Those of you who have worked in
either analytical or synthetic labs will realize the importance of this
last comment.)
     Does anyone know what proportion of chemists are involved in the food and
beverage industry?  I would guess that a lot of them (us?  I never know
whether to count academic weanies like me in this sort of thing.) do.

				Marc R. Roussel
                                mroussel@alchemy.chem.utoronto.ca
From: bg055@cleveland.Freenet.Edu (Stewart Rowe)
Newsgroups: sci.chem
Subject: Re: Oil Spills
Date: 17 Nov 92 00:34:56 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


Just as a lay person, it was apparent that, especially in near-
freezing temperatures, crude oil is like tar or glue. It is NOT
fluid, and the waves spread it all over the shore rocks and
mixed it with the gravel.
Newsgroups: sci.chem
From: aflorjan@magnus.acs.ohio-state.edu (Alan S Florjancic)
Subject: Chiral Columns
Organization: The Ohio State University
Date: Wed, 18 Nov 1992 23:55:15 GMT


My research group is looking into buying some chiral columns for our HPLC 
and/or GC.  We are looking to do seperations of chiral diols and BINAP 
compounds.  Can anyone with any knowledge and/or experience with these columns 
drop me Email on the best types of columns and their companies.
Thanks in advance

Alan Florjancic
The Ohio State University
From: xenon@drycas.club.cc.cmu.edu
Newsgroups: sci.chem
Subject: Re: Methylene Dichloride
Date: 21 Nov 92 22:46:16 GMT
Organization: Carnegie Mellon Computer Club

In article <1ejbb2INNpak@gap.caltech.edu>, tt@wag.caltech.edu (Toshi Takeuchi) writes:
> In article <jpz10q_@rpi.edu> lordj@rpi.edu writes:
> (about methylene chloride)
> 
>>   I meant in paint removers.  It's mixed in with god knows what else
>>and will remove skin in a matter of seconds.  I've never seen pure
>>methylene chloride outside of the lab.
> 
> No, it doesn't remove skin at all.  It just sort of goes through the skin
> and make it dry as someone pointed out.  It also makes the skin tingle
> with some sort of pain.

The source of your disagreement stems from the antecedent of the word "it". 
lordj is saying that *paint remover* will remove skin, not that methylene
chloride will remove skin.

> However!!
> 
> Don't be stupid and intentionally dip you hand in methylene chloride
> to check it out unless you like to eat up your liver...
> 
> Toshi

I wouldn't dip my hand in paint remover either... ;)


 
Newsgroups: sci.chem