HDTenEightyP/NetNews huggingface dataset:
From: forster@sispa.chem.tu-berlin.de (Peter Forster)
Newsgroups: sci.chem
Subject: Brehmstrehhlung must be spelled 'Bremsstrahlung'
Date: 28 Jan 1993 13:32:23 GMT
Organization: Technische Universitaet Berlin, Germany
NNTP-Posting-Host: sispa.chem.tu-berlin.de

Sorry for being to picky, but I just can't see it anymore. The spelling
is as indicated in the subject line. (I know, everybody just 'r'eplied
to somebody else's posting, and that somebody else misspelled it.)

Peter

==============================================================================
 Peter Forster                                forster@sispa.chem.tu-berlin.de
 Iwan-N.-Stranski-Institut
 fuer Physikalische und Theoretische Chemie
 Technische Universitaet Berlin
 Sekretariat ER1
 Strasse des 17. Juni 112          
 1000 Berlin 12                                  Phone:    (+49-30) 314-24352
 Germany                                         Fax:      (+49-30) 314-26602
==============================================================================
From: davidlai@unixg.ubc.ca (David TW Lai)
Newsgroups: sci.chem
Subject: Nuclear Chemistry (K-40 decay)
Date: 22 Jan 93 05:55:16 GMT
Organization: The University of British Columbia
NNTP-Posting-Host: unixg.ubc.ca

Hi,

	According to my book, K-40 decays into two products.  About 11%
decays into Ar-40, and 89% decays into Ca-40.  My book says that since
K-40 follows two decay paths, TWO decay constants must be kept in doing
K-40 decay problems.  However, if I follow the following equations from
p.69 of Principles of Isotope Geology:

Le = .581 x 10^-10  (Decay constant of K-40 to Ar-40)

Lb = 4.962 x 10^-10 (Decay constant of K-40 to Ca-40)

L = 5.543 x 10^-10  (Total decay constant of K-40)

t = (1/L)  ln( (Ar-40/K-40) * (L/Le) +1 )
  
  = 1.804 x 10^9 ln (10*9.540 + 1)

  = 1.804 x 10^9 ln (96.40)
 
  = 1.804 x 10^9 * 4.569

 = 8.242 x 10^9  OR 8.242 billion years.

	The modern estimate of the Earth's age is 4.55 billion years only!

	The original question is that there is a rock with 1 atom of K-40
and 10 atoms of Ar-40 (relatively).  And determine the age of this rock.
If this rock is really 8.242 billion years, it may have come from the 
outer space!  ;-)

	Would someone comment on this?

					Regards,

						David.

Xref: sparky sci.chem:5933 sci.physics.fusion:3379
From: dima@arm.msk.su (dima)
Newsgroups: sci.chem,sci.physics.fusion
Subject: New nuclear data
Date: Thu, 21 Jan 93 21:56:55 MSK
Organization: Levkovsky's home

Dear Scientists!
I want to suggest for your attention the book: "Cross sections
of mass medium nuclide activation (A=40-100) by medium energy 
protons and a-particles (E=10-50MeV)", 
by PhD of Physics V. N. Levkovski (activation method, radiation 
material science; worked in the Nuclear Physics Institute, 
Kazakhstan, former USSR).
                       SUMMARY
Experimental research of more than 500 nuclear reactions activation
cross sections, depending on energy of bombarding particles, and
nuclear-physical characteristics of nuclide-targets and reaction
products are presented and classified in this book.
The book is of interest for experts in the field  of practical use
of charged particle accelerators, activation analysis, 
isotope production, radiation material testing, radiation chemistry,
space chemistry, as well as for scientists and postgraduates 
majoring in fundamental theoretical research.

The book contain: 55 pages of grafs, 87 - tables of experimental
results, 73 - phenomenological analysis, in all -215 pages.
ALL DATA PRESENTED IN THIS BOOK ARE PUBLISHED FOR THE FIRST TIME!
Price:US$50
I am Dmitri Levkovski, son of V. N. Levkovski.
After my father's death, I succeeded in having the book published in
Russia with my family's money. Now by selling the adapted for English
speaking user variant of the book(with applied translated in English
expanded contents and tables of data guide usage), I am trying to
collect money for having the book published in English.

Everybody who is interested in buying this book send me a message, please.

I would appreciate any of your thoughts(about the price also) and ideas
which might help to expand the use of this book.
Thank You!
Dmitri Levkovski
From: cpresson@jido.b30.ingr.com (Craig Presson)
Subject: Re: humor
Reply-To: craig@jido.b30.ingr.com
Organization: Intergraph Corporation, Huntsville, Alabama
	<18JAN199320052369@vtcc1.cc.vt.edu>
	<1993Jan19.044905.7238@sifon.cc.mcgill.ca>
Date: Wed, 20 Jan 1993 22:43:19 GMT

In article <1993Jan19.044905.7238@sifon.cc.mcgill.ca> bspencer@cs.mcgill.ca (Brian SPENCER) writes:
[other people's stories]
   The best story I heard from a first year lab was this: The procedure
   said to heat the reaction to 150 Celsius. This student's thermometer
   only went to 100 degrees. She asked if she could use two thermometers to
   get up to 150!

Well, DUH. Hook 'em up in series! Even a software geek knows that!

-- Craig Presson (SWG)

Newsgroups: sci.chem
From: neal@cmptrc.lonestar.org (Neal Howard)
Subject: Re: more humor <toonces>
Date: Wed, 27 Jan 1993 17:48:35 GMT
Organization: CompuTrac Inc., Richardson TX

In article <1993Jan27.082948.91107@vaxc.cc.monash.edu.au> hewitt@vaxc.cc.monash.edu.au writes:
>What the hell is a 'toonce'?
>David Hewitt
>Chemistry Department
>Monash University

Toonces is the name of a cat who drives an automobile on the "Saturday Night
Live" comedy show broadcast on NBC here in the US. The "Toonces, the driving
cat" episodes are pretty much cornball humor, but they have somewhat of a
cult following.

ObChemHumor> Here is a limmerick that I think was originally posted in
a Seattle newspaper and was posted here in this newsgroup some months ago, I'll
repost but I don't know who the original author was:

     A mosquito was heard to complain
     That a chemist had poisoned his brain
     The cause of his sorrow was para-dichloro-
     Diphenyltrichloroethane.
-- 
=============================================================================
Neal Howard   '91 XLH-1200      DoD #686      CompuTrac, Inc (Richardson, TX)
	      doh #0000001200
         "Let us learn to dream, gentlemen, and then perhaps
          we shall learn the truth." -- August Kekule' (1890)
=============================================================================
Newsgroups: sci.chem
From: stmfarqu@atlas.cs.upei.ca (Michael J. Farquharson)
Subject: *** Need future uses for NICKEL!!***
Organization: University of Prince Edward Island
Date: Tue, 26 Jan 1993 19:21:54 GMT

Hi there... my mother is doing a paper for a business course and she needs to
know what possible future uses there are for Nickel.  This can be either
nickel itself or nickel as an alloy in the manufacturing of steel.  Thank you
for your assistance.

Please E-Mail me as I do not read this group often...  Thanks.

===============================================================================
Michael Farquharson  | Sysop:  Starbase 1 BBS, Sherwood, P.E.I., Canada
stmfarqu@upei.ca     | Phone:  (902)-628-1230
UPEI Engineering     | Running Maximus 2.01wb with SupraFAXModem 14.4
===============================================================================
From: wcaw@juliet.caltech.edu (Wilisch, Wolf C. A.)
Newsgroups: sci.chem
Subject: Macintosh Font With Double Arrow Character ?
Date: 25 Jan 93 22:46:00 GMT
Article-I.D.: juliet.25JAN199314462017
Distribution: world
Organization: California Institute of Technology
NNTP-Posting-Host: juliet.caltech.edu
News-Software: VAX/VMS VNEWS 1.41

Hi!

Does anyone out there know about a font for the Apple Macintosh that
has a double arrow in it (for equilibria and the like, not the one 
for resonance structures)?  Our secretary and I would most certainly
appreciate knowing about one.

Thanks

Chris W
From: andreas@gotcha.swb.de (Andreas Heitmann)
Newsgroups: sci.chem
Subject: STN access via Internet ?
Distribution: world
X-NewsSoftware: GRn 1.16f (10.17.92) by Mike Schwartz & Michael B. Smith
Date: 25 Jan 93 23:58:14 CET

Hi!

Today i tried to get access to the STN database via Internet
without success. A friend of mine has to do some investigation
about nuclear chemistry and the only person who knows how
to log in to STN is on vacation. I'd be happy if someone
could give me an Internet address of a STN node.

Bye,

Andreas Heitmann

andreas@gotcha.swb.de
ah@hrz.uni-kassel.de
ftpadmin@ftp.hrz.uni-kassel.de
ah@rbg.informatik.th-darmstadt.de
From: pickrell@hoss.unl.edu (Andrew Pickrell)
Newsgroups: sci.chem
Subject: Looking for site with current contents +
Date: 25 Jan 1993 17:48:33 GMT
Organization: University of Nebraska--Lincoln	
Distribution: world
NNTP-Posting-Host: hoss.unl.edu
Summary: Where can I get access to Current Contents?
Keywords: current contents

I am interested in finding access to a site with current contents adn
science citation indexes on-line.  If these are available to outside users,
please leave me e-mail with instructions.

Other relavent information would be appriciated. (I am currently only
aware of CARL for database searches).

Thanks,
Andrew Pickrell

--
==============================================================================
Andrew Pickrell                  | All opinions expressed are copyrighted
UNL Dept. of Chemical Engineering| material. If you are illegally using them,
EMail :pickrell@hoss.unl.edu     | prepare to be sued. ;)
From: gcook@horus.cem.msu.EDU (Greg Cook|xxxxxx)
Newsgroups: sci.chem
Subject: Re: light
Date: 24 Jan 93 14:11:12 GMT
Distribution: usa
Organization: Michigan State University
NNTP-Posting-Host: horus.cem.msu.edu

From article <mtymp15.727855065@staff.tc.umn.edu>, by mtymp15@staff.tc.umn.edu (David Hutton):
> In <1993Jan22.191802.28683@magnus.acs.ohio-state.edu> tdunsize@magnus.acs.ohio-state.edu (Todd Dunsizer) writes:
> hydrogen peroxide solution.  Now move to a darkened area.  Add about 0.5 g
> of small crystalline chunks of potassium hexacyanoferrate(III) (also known
> as potassium ferricyanide) to the solution, swirl it, and note what happens.

Actually, instead of potassium ferricyanide, you can use blood to start
this reaction.  The iron in the blood is the active ingredient.  Could
be an INTERESTING demonstration.  :-)'

     Gregory R. Cook         |  INTERNET:    gcook@horus.cem.msu.edu
 Department of Chemistry     |               cookgreg@student.msu.edu
Michigan State University    |  BITNET:      cook@msucem.BITNET
 East Lansing, MI  48824     |  COMPUSERVE:  74170,3010
Newsgroups: sci.chem
From: barney@well.sf.ca.us (Robert Grubbs)
Subject: Dendrimers
Summary: seeking info about dendrimers
Keywords: Dendrimers, Dendritic Macromolecules, starburst polymerization
Organization: Whole Earth 'Lectronic Link
Date: Mon, 25 Jan 1993 23:22:29 GMT


    I'm currently writing an undergraduate chemistry thesis at Pomona
College in Claremont, CA, and would be interested in hearing from anyone
with interesting information on the topic.  Thanks.
From: phil.st-amour@synapse.org (Phil St-Amour) 
Newsgroups: sci.chem
Subject: Re: humor
Date: 23 Jan 93 12:33:00 GMT
Distribution: world
Organization: SYNAPSE BBS - GATINEAU, QUEBEC - 819-561-4321
Reply-To: phil.st-amour@synapse.org (Phil St-Amour) 

To: sci.chem

And then there was the first year student who was wrapping ice in paper 
towels.  When asked by the T.A. what he was doing, he explained that the 
experiment called for "dry" ice so he was drying it off!


|------------------------|----------------------------|
| Phil St-Amour          |  phil.st-amour@synapse.org |
| Nepean, Ontario        |                            |
| Canada                 |                            |
|------------------------|----------------------------|




---
 . WinQwk 2.0b#519 . If this were an actual tagline, it would be funny.
From: rmede@waikato.ac.nz
Newsgroups: sci.chem
Subject: Re: Chem Abstracts on the Net
Date: 29 Jan 93 11:36:34 +1300
Organization: University of Waikato, Hamilton, New Zealand

In article <zdr3mbl@rpi.edu>, lordj@vccnw06.its.rpi.edu (Joel Patrick Lord) writes:
> I know that this came up a week or two ago, but I seem to have lost
> the address.  Could someone mail it to me again?
> 
> 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.

Read # 9397!
From: laurent@kaa (Laurent Fulchieri)
Newsgroups: sci.chem
Subject: XRAY diffraction of C60 CRISTAL
Date: 21 Jan 93 10:27:17 GMT
Reply-To: laurent@cenerg.cma.f
X-Newsreader: Tin 1.1 PL4

Some studies have been carried out on X ray characterization
of C60 cristal:

( P. A. HEINEY, J.E. FISCHER, ... Phys. Rev. Lett., 66,
1991, pp 2911-2914.)

1 - What does an X ray diffraction spectrum of C60 cristal
look like ?

2 - Because caracteristic dimension of the cristal grid is 
about 10 nm why using X ray ? Wouldn't it be better 
to use greater wave length ?

Xref: sparky sci.chem:5941 sci.bio:4967 sci.environment:14770
From: oliveira@inm.uni-sb.de (Peter William Oliveira)
Newsgroups: sci.chem,sci.bio,sci.environment
Subject: structure activity relationship
Date: 23 Jan 93 18:02:41
Organization: Institute for New Materials (INM), Saarbr"ucken, Germany.
Distribution: world
NNTP-Posting-Host: inmsol.inm.uni-sb.de

 I am doing research on Environmental Toxicology of Benzoyl Phenyl Ureas as
insect growth regulators,and need independent literature(from Industry),book
or paper on their structure/activity relationships,environmental persistence,
studies on pharmaco/toxico-dynamics,synergism and potentiation of effects,in
birds(preferably pigeons),mammals,and humans.Thanking in advance,
 Julio Pilnik
Centre for Environmental Research,University of Saarbrucken,Germany.
 P.S.I have problems to read frequently Newsgroup,so please,send
 reply to oliveira@inm.uni-sb.de
Newsgroups: sci.chem
From: dnash@uxa.cso.uiuc.edu (Mirrors 'R' Us)
Subject: Re: Technetium
Organization: University of Illinois at Urbana
Date: Thu, 21 Jan 1993 04:14:35 GMT

In article <staff.02rp@rabbit.augs.se> staff@rabbit.augs.se (Staffan Friberg) writes:
>In article <1993Jan19.005230.19534@husc15.harvard.edu> blom@husc15.harvard.edu writes:

>> radioactivity.  Also, please note that radioactivity is almost harmless until
>> it enters the body.  It is only then that it becomes lethal.
>
>Yes, but it wouldn't matter, would it? The half-life for Tc is something like
>six hours.

You forgot about other isotopes of the stuff.  The six hours is for Tc-99.
Tc-97 and Tc-98 have half-lives of 2.6 million and 1.5 million years
respectively.  (At least if I can trust my tables here.)

>  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  + Staffan Friberg                   +  InterNet: staff@rabbit.augs.se +
>  + Undergraduate student  Chemistry  +  FidoNet:  2:204/404.2          +
>  + Linkoping University  Sweden      +                                 +
>  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  Life, loathe it or ignore it, you can't like it.   (Marvin)


-- 
David Nash                  | Gradual Student, Chemistry
                            | University of Illinois (Urbana)
(dnash@uxa.cso.uiuc.edu)    | This .sig is made of 100% recycled electrons.
(nash@aries.scs.uiuc.edu)   | No binary trees were killed to make it.
Newsgroups: sci.chem
From: roberts@ucunix.san.uc.edu (Michael Alan Roberts)
Subject: Est. the age of rock
Organization: University of Cincinnati
Date: Thu, 21 Jan 1993 19:46:08 GMT

To the person who wanted to know how to estimate the age of a rock based
on radioisotope decay:

The logic goes something like this: After one half-life, only 50% of the
original non-decayed material remains. If 25% of the non-decayed
material is left, then, obviously, two half-lives have elapsed.

In your example, 10% of the material remains. The number of half-lives
that have elapsed can be defined as "x", where:

(1/2)^x = 0.1

Solving:

x * log(0.5) = log(0.1)
x = log(0.1)/log(0.5)
x = -1 / -0.30103
x = 3.3219 half-lives
Since one half-life is stated as 1.3 billion years in your problem, the
age of the rock can be estimated as:

3.3219 half-lives * 1.3 billion yrs./half-life = 4.3185 billion years.

Mind you, you will have to correct the math to account for whatever
number of significant figures you were given.

Also note that the general expression for the number of half-lives that
have elapsed, er, sorry, the expression for the age of an object based
on radioactive decay is:

h * log(p) / log(0.5)

where h is the duration of one half-life, and p is the proportion (NOT
the percentage) of non-decayed material remaining.

Hope this helps.

Michael Roberts
University of Cincinnati
roberts@ucunix.san.uc.edu

Organization: Chemistry, Carnegie Mellon, Pittsburgh, PA
Newsgroups: sci.chem
Date: Mon, 25 Jan 1993 15:08:13 -0500 
From: Paul Karol <pk03+@andrew.cmu.edu>
Subject: Re: Technetium

On diversions from the original question about technetium and steel
there have been some comments on superheavy elements 114 and 126 and
what would happen when there are attempts to make these.  You should all
be aware that the attempts have been underway for many years, without
documentable success. There have been bombardments of uranium with
uranium which product element Z = 184 at the moment of impact, but no
elements with Z > 109 have been identified.

Paul J. Karol

Xref: sparky sci.chem:5998 rec.humor:38970
From: gcook@horus.cem.msu.EDU (Greg Cook|xxxxxx)
Newsgroups: sci.chem
Subject: Re: Chemical Word Processor for PC
Date: 22 Jan 93 18:38:12 GMT
Distribution: usa
Organization: Michigan State University
NNTP-Posting-Host: horus.cem.msu.edu

From article <1993Jan22.155704.28938@cc.gatech.edu>, by gn@cc.gatech.edu (toM o. genesE):
> Hello,
> 
>   I am looking for an *inexpensive* (student budget ;-) chemical word
> processing system for a PC.  I'd like to be able to connect ring
> structures, add groups, etc., as well as supplement the drawings with
> text if necessary.
> 
>   Any suggestions?  Please respond via email.
 
Check out ChemWindows from SoftShell.  Student price is $99 and well 
worth it.

     Gregory R. Cook         |  INTERNET:    gcook@horus.cem.msu.edu
 Department of Chemistry     |               cookgreg@student.msu.edu
Michigan State University    |  BITNET:      cook@msucem.BITNET
 East Lansing, MI  48824     |  COMPUSERVE:  74170,3010
Newsgroups: sci.chem
Newsgroups: sci.chem
Subject: Polonium chemistry
Date: Tue, 19 Jan 1993 15:21:00 -0600

Greetings, all; this is a new option for me, access to the NET.
Please bear with me: I'm still trying to arrange reliable return
responses.
Question: Where can I find specific information on the 
electrochemical behaviour of Polonium in association with
Lead (Pb)?  There seems little chance of finding what I need
in 'standard' texts, since Polonium has no stable isotopes,
hence cannot have any stable chemical associations, and I
actually need something more in the line of Van der Walls'
forces _near_ the Polonium and the Lead.  Here's the hypothetical
situation (which is actually _not_ hypothetical): Suppose that
one had, say, one hundred atoms of lead sitting in a little pile
on the "floor" of a cubic cavity half a micron on a side (one-
eighth cubic microns).  In the cavity suddenly appears a Polonium
atom moving in some random direction with a thermally-related
impetus of about eighty degrees.  What forces, if any, would this
suddenly-appearing atom of Polonium "feel" from the pile of Lead
atoms on the floor of the cavity in the time allowed before it
"settles" gravitationally onto the floor?

There is a direct application for this information, which is too
complicated to go into here, so it is _not_ a "strange" question;
I actually have to deal with exactly what I've described, with
the cavity being quite a bit _longer_ (but not wider), and the
atom of Polonium actually "appearing" _as_ Polonium suddenly
out of "nowhere" due to its having been Radon-222 up 'till the
moment of its change to Polonium.  (Radon, an inert gas, will not
"feel" any electrochemical forces from nearby atoms, I understand,
with its filled outer shell.)

Thank you, and someone please try to respond so I can determine
if messages can actually get to me here...

John.Brawley@f9.n8012.z86.toadnet.org

reachable also via c1749h@umslvma.edu

___ Blue Wave/QWK v2.12


Newsgroups: sci.chem
From: dehaseth@athena.cs.uga.edu (James A de Haseth)
Subject: Chemical fog
Keywords: Fog
Organization: University of Georgia, Athens
Distribution: usa
Date: Tue, 26 Jan 1993 18:47:05 GMT

Does anyone know how to make a fog that lies close to the floor (about
8 to 12 inches thick) and is non-toxic?  I can do this with LN_2 and
hot water, but I'm looking for something a bit cheaper.  I'll be
doing this around kids, so I don't want anything that can be really
dangerous.

Any help would be greatly appreciated.  You can post to sci.chem or
send email directly to me.  Thanks,

Jim de Haseth
-- 
------------------------------------------------------------------------------
James A. de Haseth			dehaseth@dehsrv.chem.uga.edu
Department of Chemistry			dehaseth@athena.cs.uga.edu (alternate)
University of Georgia
From: barinaga@netcom.com (Marcia Barinaga)
Newsgroups: sci.chem
Subject: female mentors in science
Date: 26 Jan 93 19:09:31 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

testing
Heading: Female mentors in science

I am a reporter with Science magazine, and am preparing articles
for an upcoming special news section on women in science. 

I am looking for an example of a female scientist who has left 
her mark on a field by attracting, inspiring and training female 
scientists. I have heard that in some fields, particularly those 
in which there are few women, one may find a clustering of women
in a sub-discipline, and that one can often trace their lineage 
back to a particularly influential mentor. I am looking for a 
compelling example of that phenomenon, particularly in a field
such as chemistry, math or physics, in which there are fewer 
women than there are in, for example, the life sciences.

Also, for a related article in the same issue, I am seeking
comments from both male and female scientists on the 
question of whether women approach science differently than
men. I know this is a controversial question, and am hoping
to present a range of views on it. Do women have different 
styles of conducting science, and even different intellectual 
approaches that may enrich their fields either through 
added diversity, or as an example men might learn from?

I know about some scholars such as Evelyn Fox Keller who deal 
with gender and science. I plan to include them in my article, and
would be happy to hear about more such scholars, but I am also 
looking for real-life examples to use in my article: for men or 
women who have compelling anecdotes about their 
experiences with female vs male scientists, and differences
or similarities in their styles of doing science.


If you have suggestions of scientists who I should contact, 
for either of these articles, or if you would be willing to 
be interviewed yourself for my articles or want to send me 
your comments for use in the articles, please e-mail me.

My address on the internet is  
barinaga@netcom.com

I am new on the internet, and am posting this query in a 
couple of newsgroups that seemed appropriate. I hope I have
not made any errors in that choice, but please forgive me
if I have. 

Thank you for your patience in considering my query,
Marcia Barinaga
West Coast Correspondent
Science magazine