HDTenEightyP/NetNews huggingface dataset:
From: em21+@andrew.cmu.edu (Eric Edward Moore)
Newsgroups: sci.chem,rec.autos.tech,misc.consumers,sci.environment,talk.environment,rec.autos
Subject: Re: Carburetors, gasoline, and why I don't recycle
Date: 5 Sep 92 06:39:33 GMT
Article-I.D.: andrew.EeeAOZW00VpDA6R5hc
	<1992Sep5.123145.5752@cco.caltech.edu>
Distribution: na
Organization: Carnegie Mellon, Pittsburgh, PA

rickert@cco.caltech.edu (Keith Warren Rickert) writes:
> This was i believe the point of the original post.....that there is a large
> amount of energy usage that is going to be very hard to estimate, 
> especially for someone just sitting at home with their physics books or
> whatever. 

OK, someone take a car, go out on a flat road, accelerate to some
fixed speed, and turn off the engine, dropping a can of paint out the
window.  measure the distance between where the car stops and the
paint splash.

v^2 = 2as

k = 1/2 mv^2

dk/ds = ma

dk/ds = mv^2/2s

the last is the loss in kinetic energy per unit distance.

	-Love, Kisses, and a Neutron Bomb
		-Eric the Finn
Newsgroups: sci.chem,sci.energy
From: whit@milton.u.washington.edu (John Whitmore)
Subject: Re: Can a 'dead' nicad be recharged?
Organization: University of Washington, Seattle
Date: Thu, 10 Sep 1992 02:33:53 GMT

In article <1992Sep8.171432.1@eis.dofasco.ca> fraser_h@eis.dofasco.ca writes:
>I've just picked up a cordless drill at a garage sale. It came
>with 2 sets of nicads, one of which will hold a partial charge,
>the other will not hold any charge

	If these are really nicads, they MIGHT have failed by whisker
formation (a metal whisker may be short-circuiting the cell).  This
kind of failure is reversible; just use a HUGE overcurrent pulse.
Forty amps is about right; easiest way is to charge a capacitor
(20,000 uF at 30V) and jam it onto the cell (use a heavy knife
switch).

	Whiskers are burned out by this procedure; if you discharge
QUICKLY, the whiskers don't grow long (but blunt instead), so some
people recommend regular heavy-discharge cycles (NOT the same
as DEEP-discharge).

	If the cells show 0V while charging, this is likely the problem.
If, on the other hand, the cell shows more than 1.2V when charging,
and drops abruptly when the charge is discontinued, the problem is
likely to be loss of electrolyte (and the cell can only be discarded).
The electrolyte, by the way, is a KOH solution; it is a bit caustic,
you DON'T want to get it on your fingers.

	John Whitmore


Newsgroups: sci.chem
From: aankrom@nyx.cs.du.edu (Anthony Ankrom)
Subject: Re: 1,4-dichloro-2-butyne
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: Sat, 5 Sep 92 22:12:05 GMT

In article <1992Sep3.155152.14435@porthos.cc.bellcore.com> tony2@prefect.
ucp (21131-gozdz) writes:
>In article <1992Sep3.032555.3246@mnemosyne.cs.du.edu> aankrom@nyx.cs.du.
du (Anthony Ankrom) writes:
>>
>> I need to know a facile synthesis for 1,4-dichloro-2-butyne. Please po
t
>>or e-mail...
>>
>
>Why bother with the synthesis if Aldrich sells it for $38/25g?
>(there are at least 7 other suppliers here in the US).
>
>--Tony


 Perhaps I WANT to synthesize it... Really. I also forgot to mention the
fact that I want to use acetylene as the starting material. I am well
aware of the fact that Aldrich and Chemical Dynamics both sell it as I'm
sure most other suppliers do, but I have my min dset on synthesizing it
myself. Forgive me for actually LIKING organic chemistry...

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: hclase@morgan.ucs.mun.ca (Howard Clase)
Subject: NiCads and Lead/Acid accumulators
Organization: Memorial University of Newfoundland
Date: Wed, 9 Sep 1992 13:26:04 GMT

	Someone asked about the difference between these.  The main difference,
as the names imply is in the chemistry.   Many people do not realise that all
batteries work by chemical reactions.

	The discharge reaction for the lead acid system is:

Pb(s) + H2SO4(aq)                    =  PbSO4(s) + 2H+(aq) + 2e-
PbO2(s) + H2SO4(aq) + 2H+(aq) + 2e-  =  PbSO4 + 2H2O(l)
----------------------------------------------------------------
Pb(s) + PbO2(s) + 2H2SO4(aq)         =  2PbSO4(s) + 2H2O(l)

	Over charging results in electrolysis of the sulphuric acid and
evolution of an explosive mixture of O2 and H2.   Because of this it is
difficult to devise completely sealed systems - the gas has to be allowed to
escape.   This means that the liquid can too, and you have to be careful to
keep the battery the right way up!   Some sealed batteries have been develpoed
that use a catalyst (Pd?) to recombine the gases harmlessly, but I don't know
how well this has worked in practise.

	The other thing to note is that one of the reactants (H+) is in
solution, and its concentration will change as the battery discharges giving a
reduction in potential (voltage).   This does not happen to the same extent
with nicads (or alkaline "zinc carbon" - really zinc/manganese dioxide - cells)
because all the reactants are solids, and there is no voltage change until one
of them is all used up when the cell just stops (in theory!)

	The reactions in a NiCad are:

2Ni(OH)3(s) + 2e-     =  2Ni(OH)2(s) + 2(OH)-(aq)
Cd(s) + 2(OH)-        =  Cd(OH)2(s) + 2e-
--------------------------------------------------
2Ni(OH)3(s) + Cd(s)   =  2Ni(OH)2(s) + Cd(OH)2(s)

	Of course the physical arrangement differs too.   If you take apart a
NiCad (care the paste is basic (lye)) you will find that the two electrodes are
long strips wound into a spiral with a very small gap between them, which is
probably why they easily develop permanent shorts.

	Howard Clase

Newsgroups: sci.chem,rec.autos,rec.autos.tech,misc.consumers,sci.environment,talk.environment
From: cec35848@uxa.cso.uiuc.edu (Chuck Carroll)
Subject: Re: Carburetors, gasoline, and why I don't recycle
Organization: University of Illinois at Urbana
Distribution: na
Date: Sun, 6 Sep 1992 17:50:43 GMT

brian@quake.sylmar.ca.us (Brian K. Yoder) writes:

>In article <Bu0KzB.6w1@news.cso.uiuc.edu> cec35848@uxa.cso.uiuc.edu (Chuck Carroll) writes:
>>knapp@spot.Colorado.EDU (David Knapp) writes:
>>
>>>In article <Btz7xq.H47@news.cso.uiuc.edu> cec35848@uxa.cso.uiuc.edu (Chuck Carroll) writes:
>>>>1)  You'll need a pretty good estimate of friction, since without it
>>>>it would take no energy to move a car over level ground. 
>>
>>>What about W=F*d?  Ek=1/2m*(dV)^2?  P=m(dV)?
>>
>>Without friction, it would take only an infintesimally small force to
>>start the car moving, and once you did, it could go indefinitely.  The
>>same goes for the other equations.

>Learn some physics, eh?  How about some common sense while you are at it?
>Have you ever heard os a thing called air resistance?

You're right.  We need a pretty good estaimte of air resistance, too, then.

-- 
Chuck Carroll		  | "What can I say when I've ruined your day
cec35848@uxa.cso.uiuc.edu |  And made you all angry and surly?
			  |  How could I make such a thoughtless mistake
			  |  And bury your mother too early?" -- Earl Sinclair
Newsgroups: sci.chem
From: aankrom@nyx.cs.du.edu (Anthony Ankrom)
Subject: Re: 1,4-dichloro-2-butyne
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: Fri, 11 Sep 92 17:50:14 GMT


 I suppose my decision to unsubscribe to this group might have been a
little hasty, given my passion for chemistry and organic chemistry
especially. 
 It's nice to see support.

 A little knowledge may be a dangerous thing, but ignorance is deadly...

St. Anthony

--
        CH3  O            CH(CH3)2        |      dadaMatrix
           >-P-S-CH2CH2-N<            VX  |                       
    CH3CH2O               CH(CH3)2        |     aankrom@nyx.cs.du.edu
                                          | A kinder gentler lobotomy...
Newsgroups: sci.chem,sci.med,sci.engr.chem,sci.engr.civil
From: king@reasoning.com (Dick King)
Subject: Re: NRDC Criticizes Domenici Plan to Gut Drinking Water Protections
Organization: Reasoning Systems, Inc., Palo Alto, CA
Date: Mon, 7 Sep 1992 18:18:28 GMT

In article <1992Sep5.013309.8282@doug.cae.wisc.edu> kasab@luther.che.wisc.edu (John J. Kasab)  writes:
>In article <...> bjgaed@bb1t.monsanto.com writes:
>
>>First, should Albuquerque spend $250 million to eliminate, say, less 
>>than two excess cancer deaths per year?  
>
>You are rather naively assuming that because Albuquerque doesn't spend $250 M
>on water cleanup that it wouldn't ordinarily have to spend that it would
>spend it "more wisely" on, say, preventative medicine.  More likely, it will
>go to fund police departments, or get kicked back to taxpayers (or other
>people, depending on how clean your government is :), or whatever.

This kinda dinged one of my "hot buttons".

There seems to be theis feeling that if money is left in the hands of taxpayers
this is somehow wated bucks.

First, individuals can make a lot of risk-reducing decisions with $250 million.
How many houses could be tested for Radon, and fixed up if that potent but
common carconogen is found?  How many cars with air-bags or ABS brakes could be
bought?

Second, if a taxpayer gets a bolus of money and does NOT buy a new car with
airbags but instead reroofs his house or takes a vacation or puts it in the
bank towards their kids' college or retirment, it seems wrong to say that the
money was somehoe wasted because it was a 1/500000 part of the money needed to
buy a system that might save two lives.


If indeed a quarter billion dollars is being spent to save two lives this is an
emotional decision IMHO, and almost ANY other use of the money would be more
useful. 



-dk
Newsgroups: sci.chem
From: tony2@prefect.uucp (21131-gozdz)
Subject: Re: 1,4-dichloro-2-butyne
Organization: Bellcore, Livingston, NJ
Date: Fri, 11 Sep 92 19:08:30 GMT

In article <1992Sep11.175014.13312@mnemosyne.cs.du.edu> aankrom@nyx.cs.du.edu (Anthony Ankrom) writes:
>
> I suppose my decision to unsubscribe to this group might have been a
>little hasty, given my passion for chemistry and organic chemistry
>especially. 
> It's nice to see support.
>
> A little knowledge may be a dangerous thing, but ignorance is deadly...
>
>St. Anthony
>
>--
>        CH3  O            CH(CH3)2        |      dadaMatrix
>           >-P-S-CH2CH2-N<            VX  |                       
>    CH3CH2O               CH(CH3)2        |     aankrom@nyx.cs.du.edu
>                                          | A kinder gentler lobotomy...

I urge you to reconsider your unfortunate decision to
rejoin this group. IMHO, your thinly veiled quest for 
various ways to make illicit reagents would better fit
alt.drugs or similar. In case I'm wrong as to your
motives, please conduct your search in private. Or grow up. 
Your sick .sig tells enough about your stae of mind.

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
                           no .sig, strictly business
Newsgroups: sci.chem,sci.med,sci.engr.chem,sci.engr.civil
From: chrism@col.hp.com (Chris Magnuson)
Subject: TLV question
Date: Tue, 8 Sep 1992 00:06:26 GMT
Organization: HP Colorado Springs Division

How can I tell the TLV of 2-pentanone?  What is the number?  Is there a "public"
document like the CRC or something that gives these TLV values?

chrism@col.hp.com
From: hcart@vax.oxford.ac.uk
Newsgroups: sci.chem
Subject: Re: Isomers Heuristic?
Date: 9 Sep 92 13:02:09 GMT
Organization: Oxford University VAX 6620

In article <1992Sep8.000507.10887@col.hp.com>, 
chrism@col.hp.com (Chris Magnuson) writes:

> Has anyone come up with a heuristic that would give the count of the number
> of isomers possible for a given molecular formula?  I'm thinking that if
> you are given a molecular formula of C3 H8 O you would somehow be able to
> tell that there are 3 isomers (without drawing them).
> 
> Has this problem been solved?
> 
> chrism@col.hp.com

    I believe this has been tackled using Genetic Algorithms.
Contact me if you need further information.

    Dr Hugh Cartwright
    Physical Chemistry, Oxford University.
Newsgroups: sci.chem
From: userDHAL@mts.ucs.UAlberta.CA (David Halliwell)
Subject: Re: Carburetors, gasoline, and why I don't recycle
Organization: University Of Alberta, Edmonton Canada
Distribution: na
Date: Sat, 5 Sep 1992 22:52:24 GMT

knapp@spot.Colorado.EDU (David Knapp) writes:

>In article <dhalliwe.715631742@muskwa.ucs.ualberta.ca> userDHAL@mts.ucs.UAlberta.CA (David Halliwell) writes:
>>     Unless the trip is an extremely short one, the energy required to
>>initiate motion is rather small in comparison to the energy required
>>to overcome friction, drag, etc. For a 2000kg car, it only takes 400kJ to
>>accelerate it to 20m/s. This energy would keep a 100W light bulb running
>>for not much more than an hour. On a one-hour car trip, the *headlights*
>>would use more energy than this.


>Yep, your math checks. Good job.  But what would you guess is the amount
>of energy/time lost to friction of the wheel bearings etc? (forget air
>resistance)

    The best I could do would surely be a guess, and I don't think I could
come up with even a ballpark figure without doing quite a bit of work.
All other energy consumption could be figured out for an individual car
by looking at the overall fuel consuption, but this would include engine
efficiency, air resistance, etc., as well as bearing friction. Bearing
friction is probably a small energy sink, since wheels can be rotated by
hand when the car is on a hoist, and not a lot of heat is produced in the
bearings at road speed (though there would be wind cooling).
 
    As I said, only a guess.


Dave Halliwell
Department of Geography
University of Alberta
Edmonton, Alberta
Newsgroups: sci.chem
From: tony2@prefect.uucp (21131-gozdz)
Subject: Re: 1,4-dichloro-2-butyne
Organization: Bellcore, Livingston, NJ
Date: Thu, 10 Sep 92 12:33:51 GMT

In article <1992Sep10.053216.17873@mnemosyne.cs.du.edu> aankrom@nyx.cs.du.edu (Anthony Ankrom) writes:
>
                     [stuff deleted]

> My whole interest in this compound stemmed from my interest in
>neurochemistry. 1,4-dichloro but-2-yne is a precursor in the synthesis of
>Tremorine (bis-pyrrolidino but-2-yne), a substance used to induce
>temporary Parkonsonian symptoms. I found this compound very interesting
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>and decided that it might be a fun exercise to synthesize the whole mess
>from very simple starting materials, like that big bottle of carbide in my
>basement.
>
>St. Anthony
>
>--
>        CH3  O            CH(CH3)2        |      dadaMatrix
>           >-P-S-CH2CH2-N<            VX  |                       
>    CH3CH2O               CH(CH3)2        |     aankrom@nyx.cs.du.edu
>                                          | A kinder gentler lobotomy...
                                              ^^^^^^^^^^^^^^^^^^^^^^^^
Forgive my bluntness, but your postings indicate that
you may already represent a clinical case. That's why other
netters are reluctant to help you in your explorations
into neurochemistry. If you are so interested in research, 
use scientific methodology - go to the library.

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
                           no .sig, strictly business
Newsgroups: sci.chem
From: pbays@bach.helios.nd.edu (phil bays)
Subject: Re: chemistry ftp sites
Organization: University of Notre Dame, Notre Dame
Date: Tue, 8 Sep 1992 01:43:51 GMT

Newsgroups: sci.chem
From: aankrom@nyx.cs.du.edu (Anthony Ankrom)
Subject: Re: 1,4-dichloro-2-butyne
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: Tue, 15 Sep 92 06:05:28 GMT

In article <2ab0de6cwnr070@ark.abg.sub.org> ralf@ark.abg.sub.org (Ralf St
phan) writes:
>> [...] My expectations for this group have gone unmet. So I
>> officially sign-off of this group and am submitting my proposal for
>> sci.chem.organic and I will make it very clear in my charter that ANYT
IN
>> goes in discussion and no information is "forbidden fruit".
>
>This is sad.  I also didn't expect that ignorance from the group.
>It neutralizes the idea of global information exchange.
> 
>>  I now continue my task of digging through myriad journals unaided by
>> technology. (At least not at this end.)
>
>Best wishes.  Sorry that I couldn't help, but I'm not at an university.
>
>--ralf


 I'm not leaving. I'm too stubborn. 
  
 So how come nobody answered my question about unsymmetically
N-substituted, 2-oxo benzimidazoles? Do I have to go dig through the
Chemical Abstracts Ring Index?

St. Anthony

--
        CH3  O            CH(CH3)2        |      dadaMatrix
           >-P-S-CH2CH2-N<            VX  |                       
    CH3CH2O               CH(CH3)2        |     aankrom@nyx.cs.du.edu
                                          | A kinder gentler lobotomy...
Newsgroups: sci.chem,sci.energy
From: dave@master.chem.yale.edu (David Maxwell)
Subject: Re: Can a 'dead' nicad be recharged?
Organization: Yale University, Department of Computer Science, New Haven, CT
Date: Tue, 8 Sep 1992 22:24:10 GMT

From article <1992Sep8.171432.1@eis.dofasco.ca>, by fraser_h@eis.dofasco.ca:
> I've just picked up a cordless drill at a garage sale. It came
> with 2 sets of nicads, one of which will hold a partial charge,
> the other will not hold any charge (so I'm told by a local
> surplus supply store where I had the batteries tested). The
> batteries are about $70 each... is there any way they can be
> recharged? What's the explanation for nicad's "memory" I hear about
> all the time, and what's the difference between the chemistry in
> a nicad and that in a lead-acid battery.
> 
> -- 
> Hugh Fraser					Dofasco Inc.
> (fraser_h@eis.dofasco.ca)			1330 Burlington St East
> (416)544-3761 X6941				Hamilton, Ont. L8N 3J5 Canada

I remember reading about this in some computer magazine which
described laptop batteries.  The person suggested that the
full charge could be restored if the battery was completely
discharged and recharged a couple of times.  The technique was
to discharge with decreasing loads levels until the battery is
dead.  For example, start with a small electric motor and 
work yourself down.  If the battery is going to work at all,
this should do it.

I know the above technique works, because I use it with my CD
player.  The CD player does not fully discharge the Ni-Cd
batteries.  Every time I recharged I got less and less out.
Then I decided to discharge fully with a little electric motor.
Now I get the full charge each time!

Hope this helps!

-Dave Maxwell (dave@doctor.chem.yale.edu)
Newsgroups: sci.chem
From:  leo@isi.itfs.nsk.su (Kuznetcov Dmitry)
Subject: just test message. Art is empty
Summary: test
Keywords: test
Reply-To: leo@isi.itfs.nsk.su
Organization: Institute of Informatics Systems
Date: Fri,  4 Sep 92 10:37:55 +0800

this is just a test message checking that conference is
not moderated
-- 
: Leopold (Dmitri Kouznetsov)       : Internet: leo@isi.itfs.nsk.su :
: Institute of Insformation Systems :                               :
: Lavrentjev str., 6,               : Tel:   (383-2) 35-50-67       :
: Novosibirsk, 630090, Russia       : Fax: +7 3832 323494/357942    :


Newsgroups: sci.chem
From: slee@hyper.hyper.com (Thomas Slee)
Subject: Re: Publishability of Mechanics Calculations
Reply-To: slee@hyper.UUCP (Thomas Slee)
Organization: Hypercube Inc.
Date: Tue, 15 Sep 1992 13:15:35 GMT

In article <1992Sep10.112507.6659@cc.ic.ac.uk> rzepa@ic.ac.uk (Henry Rzepa) writes:
>Prof Kenny Merz (merz@retina.chem.psu.edu)
>is soliciting opinions about whether molecular mechanics calculations
>which have used non-published parameters (in house, proprietary,
>developmental
>etc) can be quoted in scientific journals. 
>
>Does anyone have any opinions?

Since the question is "can" the answer, unfortunately, seems to be yes.
There are a great many papers published using unpublished parameters and
force fields.  There are even papers (such as one in a recent J. Comp.
Chem.) devoted to "validating" (i.e., testing the reliability and
applicability of) a force field that is proprietary.  

Another question, however, is "should".  To that my answer is a
definite NO.  One of the key things about scientific publications is
that their results should be reproducible: and that means 
reproduced by anybody with sufficient expertise and dedication.  
It does not mean "by anybody who has the money to buy a certain 
piece of software".  

To take a specific example, as a reader I am completely uninterested in 
the "validation" of an unknown force field.  How can I judge the
quality and limits of this validation if I do not the parameter set
is that being validated. 

So, if Prof. Merz is soliciting opinions with a view to publishing
or not publishing certain results, I hope he will decide to publish
only results that others can duplicate.

		Tom Slee, Hypercube Inc.
		slee@hyper.com
From: rzepa@ic.ac.uk (Henry Rzepa)
Newsgroups: sci.chem
Subject: Re: MOPAC bug and sources of source code
Date: 8 Sep 92 07:46:36 GMT
Organization: Department of Chemistry, Imperial College
X-UserAgent: Nuntius v1.1.1d9
X-XXMessage-ID: <A6D218D5670150FD@macb.ch.ic.ac.uk>
X-XXDate: Tue, 8 Sep 92 08:46:13 GMT

pettsj@visigoth.demon.co.uk (James Petts)

Re AVS and  MOPAC.

We have extensive Explorer modules for MOPAC. WE intend submitting them
shortly
to the Explorer archive.
_____________________________________________
|  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.                 
_____________________________________________
From: nbc2543@dsacg2.dsac.dla.mil ( Jeffrey A Erickson)
Newsgroups: sci.chem
Subject: anti-mosquito home pots
Date: 8 Sep 92 16:15:00 GMT
Organization: Defense Logistics Agency Systems Automation Center, Columbus


 Can anyone please send me the information on how to make an
efficient  anti-mosquito smoke pot? 

   Thank you in advancent.

 Respectfully Yours;
  Jeff Erickson       email - nbc2543@dsacg2.dsac.dla.mil
  DITSO-CO-B       --------------------------------------------
                  | Hobbes:"How come we play war and not peace"|
                  | Calvin:"Too few role models in peace."     | 
                  ----------------------------------------------
Disclaimer: The preceding comments are mine and in no way refelect the opinion
or policy of the U.S. Government, Military or any other Government agency.
They're controversial enough by themselves with out my help.  ;-)
Newsgroups: sci.chem