HDTenEightyP/NetNews huggingface dataset:
From: tgcpwd@rw8.urc.tue.nl (Wim van Dorst)
Newsgroups: sci.chem
Subject: Re: Trichloroacetic Acid
Date: 22 Jan 93 08:53:19 GMT
Reply-To: tgcpwd@urc.tue.nl
Organization: Eindhoven University of Technology, The Netherlands

Byron Reynolds writes:
>prescribed Trichloroacetic Acid to "burn it off".  The only problem is
>that they want $59.00 for 3ml, and I as a Chemistry Enthusiast, do not
>feel right spending $59.00 for a little splash of solution.
> 
>Does anyone know if Trichloroacetic Acid can be purchased as a chemical
>solution through normal sources without a licence?  If so, Where?

I took the first catalogue of the shelf (Aldrich, a large one here in 
the Netherlands), and found 
	trichloroacetic acid 98%:   NLG 100 per kg
        trichloroacetic acid 99%:   NLG 216 per kg
I can imagine that pharmacologically approved acetic acid will
indeed be that costly. On the other hand, I can imagine also that
for the treatment you're indicating any grade will do.

ps USD 1 ~= NLG 1.8

Met vriendelijke groeten, Wim van Dorst
-- 
---------------------------------------------------------------------
Blue Baron = Wim van Dorst, Voice (+31) 074-443937, (+31) 02152-42319
(-: baron@clifton.hobby.nl  tgcpwd@urc.tue.nl  WvD@Akzo.400net.nl :-)
---------------------------------------------------------------------
Newsgroups: sci.chem
From: frisinv@alleg.edu (Vincent Frisina)
Subject: LEPS function parameters
Organization: Allegheny College
Date: Fri, 22 Jan 1993 00:22:05 GMT


I am writing a program modeling an atom-molecule collision using the LEPS  
potential energy function. I've spent a good deal of time digging through  
old source code to find the parameters (in my copy they are beta, D, S,  
and r superscript-0) to no avail. If anyone knows where I can find a list  
of them  for various collisions (hopefully easy to read for I am not a  
chemist), please send me a message at my address below. Any help that you  
can offer would be greatly appreciated.
--
Vincent Frisina
Email: frisinv@alleg.edu
From: laurent@kaa (Laurent Fulchieri)
Newsgroups: sci.chem
Subject: Re: XRAY diffraction of C60 CRISTAL
Date: 27 Jan 93 08:17:42 GMT
Reply-To: laurent@cenerg.cma.f
X-Newsreader: Tin 1.1 PL4

nuke@reed.edu (Bill Newcomb) writes:
: laurent@cenerg.cma.f writes:
: >Some studies have been carried out on X ray characterization
: >of C60 cristal:
: 
: >1 - What does an X ray diffraction spectrum of C60 cristal
: >look like ?
: 
: A bunch of dots, I'm sure. Almost all diffraction patterns do (well,
: powder patters look like a bunch of circles, but I assume you mean single
: crystal). It's somewhat straightforward to get the structure from that dot
: pattern, but only very rough features can be gotten from jsut looking at
: the pattern. 
: 
: >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 ?

: 
: You might use 10nm light if you only wanted to know how the speres were
: packed. With x-rays, you stand a good chance of being able to tell where
: individual atoms are, thus gaining a great deal of information. 
: 

But I read in papers that C60 cristal was not a real cristal 
but a "molecular cristal" in the sense that every buckyball
(at non zero temperature) is moving arround the sphere center with 
a random movement (no covalent link between atoms of two buckyball).
So how to be able to tell where individual atoms are ?



: It'd be neat to see an ortep diagram of the ball.
: 
: Bill Newcomb
: 
: --
: ~/.oo

--
======================================================
| Laurent Fulcheri          |TEL :  (33) 93 95 74 06 |
| Centre d Energetique      |                        |
| Ecole des Mines de Paris  |FAX :  (33) 93 95 75 35 |
| Rue Claude Daunesse       |========================|
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|=====================================================
From: moroney@world.std.com (Michael Moroney)
Newsgroups: sci.chem
Subject: Re: soap bubbles
Date: 27 Jan 93 22:18:22 GMT
Organization: The World Public Access UNIX, Brookline, MA

robert@arbo.microbiol.uwa.oz.au (Robert Coelen) writes:

>Dear Chem-netters,

>My daughters (aged 5 and 7) have recently purchased a kit to blow bubbles in various
>shapes and sizes. They take their bubble blowing seriously and were very disappointed
>with the quality of the mixture supplied (i.e. it didn't bubble). I did look for a 
>newsgroup which specialised in soap bubbles, but there aren't any. So I am looking 
>towards the contributors of this group for a recipe for bubbles. Since I have a wide
>range of detergents, etc available in the lab I would be able to accomodate recipes
>which go beyond the kitchen sink.

>I look forward to receiving some super recipes to make my daughter's next weekend
>one filled with bubbles !!

Try a strong solution of clear liquid dish soap (not dishwasher or laundry
soap) in water with a little glycerine added.

-Mike
From: daniel@raphael.acpub.duke.edu (Daniel Crawford)
Newsgroups: sci.chem
Subject: Summer Undergraduate Fellowships
Date: 26 Jan 93 03:46:05 GMT
Organization: Center for Computational Quantum Chemistry


                       The University of Georgia

               CENTER FOR COMPUTATIONAL QUANTUM CHEMISTRY

             Summer Research Fellowships for Undergraduates

LOCATION: The Center for Computational Quantum Chemistry, The University
of Georgia in Athens, Georgia.

DIRECTOR: Dr. Henry F. Schaefer, III.

RESEARCH: Each Summer Research Fellow will conduct an independent
research project under the guidance of a Senior Scientist and will
receive adequate training (lectures and computer workshops) in molecular
quantum mechanics and spectroscopy.  Research at the CCQC involves the
use and development of state-of-the-art theoretical methods to describe
the electronic structure of molecules.  A wide variety of chemical
problems have been examined using _ab initio_ methods such as
Self-Consistent Field, Configuration Interaction, and Coupled Cluster.

Some examples include: 
(1) silicon analogs of common hydrocarbon compounds;
(2) potential energy hypersurfaces governing elementary gas-phase
    chemical reactions;
(3) problems in physical organic chemistry, including carbenes and
    biradicals;
(4) hydrogen-bonded systems.

QUALIFICATIONS: Applicants should have completed their junior
undergraduate year and have outstanding academic credentials.
Successful candidates invariably have an interest in pursuing Ph.D.
studies in theoretical physical chemistry in the United States.

STIPENDS: $1300 per month for a 10-12 week period.  Up to $400 in travel
assistance will be provided.

APPLICATION DEADLINE: April 1, 1993


   Send Resume, Academic Transcript and Two Letters of Reference to:

		       	T. Daniel Crawford
	     Center for Computational Quantum Chemistry
	             The University of Georgia
		     Athens, Georgia 30602-2556

Note: Resumes will be accepted via E-mail; transcripts and letters of
reference must be sent via U.S. mail.

For e-mail replys and further information, write to:

           crawdad%sherman.ccqc.uga.edu@athena.cs.uga.edu
Newsgroups: sci.chem
From: peonor@riscsm.scripps.edu (Per-Ola Norrby)
Subject: Re: salt fizzle
Organization: The Scripps Research Institute, La Jolla, California, USA
Date: Fri, 22 Jan 1993 23:19:23 GMT

In article <2198@blue.cis.pitt.edu> babar+@pitt.edu (Jonggu Moon) writes:
>
>While I'm boiling water, if I add salt, momentarily it causes
>the water to fizzle as if it will boil more,
>then soon it settles down to its raised boiling point.
>
>What causes that fizzle ? 
>
>- jon

Many compounds, especially ions, are "happier" (have a lower energy)
when they are surrounded (solvated) by, for example, water. Since
you lower the energy, excess energy is liberated as heat, vaporizing
some water.

Per-Ola Norrby
From: staff@rabbit.augs.se (Staffan Friberg)
Newsgroups: sci.chem
Subject: Re: Technetium
Distribution: world
X-NewsSoftware: GRn 1.16f (10.17.92) by Mike Schwartz & Michael B. Smith
Date: 25 Jan 93 22:47:12 CET
Organization: Amiga User Group Sweden

In article <C16nA6.632@world.std.com> moroney@world.std.com (Michael Moroney) writes:

> It has one or two isotopes with half-lives around 100 million years (or
> was it 10 million years?)  Regardless, long enough to be useful.

Yes, you're right and I'm wrong. :-( :-)

I think I mixed something up.

--
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  + Staffan Friberg                   +  EMail:                         +
  + Undergraduate student  Chemistry  +                                 +
  + Linkoping University              +  InterNet: staff@rabbit.augs.se +
  + Sweden                            +  FidoNet:  2:204/404.2          +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  Life, loathe it or ignore it, you can't like it.   (Marvin)
From: 159muehlberg@gw.wmich.edu
Newsgroups: sci.chem
Subject: more humor
Date: 22 Jan 93 23:17:58 EST
Organization: Western Michigan University

Another new humor:

My organic prof was trying to explain the basics of spectroscopy to
our class and one student was simply not understanding the concept
behind the effect of the lightwaves on the hydrogen (specifically 
NMR).  Dr. B, kind and gentle fellow that he is, asked the
student if he had ever cooked anything in a microwave.

The student's prompt response was,"nothing except my sister's cat."
Rather than reacting (pun wholly intended) violently, Dr. B
used the cat as the substance for explanation, ie, how the 
microwaves caused the rotation of the H's in the water of the
cat to change.  For the entire rest of the lecture, chemical toonces
was the topic of conversation...

Ellen Muehlberger
123muehlberg@gw.wmich.edu
"whole-hearted and half-brained"

Newsgroups: sci.chem
From: su@frp7un51.bitnet (K.B. Su)
Subject: Re: Mac Fonts with double arrow
Followup-To: sci.chem
Organization: Universite Paris 7
Date: Wed, 27 Jan 1993 12:51:07 GMT

In article <1993Jan26.085648.2198@msus1.msus.edu>, ghmo@msus1.msus.edu
wrote:
> 
> Chris W. asked about a Macintosh font with the type of double arrow
> used for equilibria expressions.
> 
 For several years, we're using ChemIntosh in our lab and we find
that this software is quite convenient in editing most of our
current chemical structures. A version of it exists too for Windows
3.1.
 The program is from SoftShell International, Ltd. 715 Horizon
Drive, Ste 390, Grand Junction, CO 81506. Phone: 303-242-7502
Fax: 303-242-6469
---------------------------------------------------------------------

    SMUP7 - Premier serveur de messagerie dedie a Jussieu, Paris.
 Informations: admin@frp7un51.bitnet/anonymous ftp@paris7.jussieu.fr
From: gcook@horus.cem.msu.EDU (Greg Cook|xxxxxx)
Newsgroups: sci.chem
Subject: Re: light
Date: 24 Jan 93 14:38:44 GMT
Distribution: usa
Organization: Michigan State University
NNTP-Posting-Host: horus.cem.msu.edu

From article <1ju820INNijs@msuinfo.cl.msu.edu>, by gcook@horus.cem.msu.EDU (Greg Cook|xxxxxx):
> 
> 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.  :-)'

Please note that I am not encouraging anyone to cut themselves or someone
else.


     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: M.S.Wileman1@lut.ac.uk
Subject: Re: Blue Urination?
Reply-To: M.S.Wileman1@lut.ac.uk (Sexy Shelly)
Organization: Loughborough University, UK.
Date: Sat, 23 Jan 93 16:24:18 GMT

Yep...

   We know it, after extensive research here at Loughborough...


   The substance you are looking for is approx 2 bottles of 
  Blue Curacao....:-):-)

      Love,

             Moose...     38)

Newsgroups: sci.chem
From: peby@fraser.UVic.CA (Paul  Eby)
Subject: Re: more humor <toonces>
Reply-To: peby@fraser.UVic.CA
Organization: University of Victoria, Victoria, BC, Canada
Date: Wed, 27 Jan 93 18:36:05 GMT


In article 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 feline star of the "Toonces the Driving Cat" segment of Saturday Night Live.  Of course, cats can't drive, so every week Toonces drives off a cliff, killing all of his passengers.  


Paul Eby 
University of Victoria
..there is more than one way to skin a cat....
Newsgroups: sci.chem
From: lordj@vccsouth13.its.rpi.edu (Joel Patrick Lord)
Subject: Re: Chemical fog
Keywords: Fog
Reply-To: lordj@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Distribution: usa
Date: Wed, 27 Jan 1993 00:32:51 GMT

   Dry ice and hot water is the standard "chemical" fog that's used
all over the place.  It sticks close to the floor and can be
incredibly thick, depending on how hot the water is.  The only two
drawbacks are the high concentrations of CO2 in the fog, and that
it disperses fairly quickly unless you're devoting LARGE quantities
of dry ice to it.  To cover a 100x40 foot stage takes about 100 lbs.
Scale it accordingly.

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: stevensf@ucsu.Colorado.EDU (STEVENS  FORREST)
Subject: molecular orbital viewer
Summary: looking for molecular orbital viewer
Keywords: molecular orbital computer
Organization: University of Colorado, Boulder
Distribution: usa
Date: Fri, 22 Jan 1993 22:22:16 GMT

I'm looking for a computer program that would allow me to look at 3-D graphics
of molecular orbitals.  I already have access to a program that generates
eigenvectors, so all I need is a program that will convert a table of
eigenvectors to a 3-D image.  It would be best if it ran on a Mac, but I have
acess to a number of computers, so can probably run nearly anything.  If you
know of any programs along these lines, please let me know by e-mail.  Thanks!

Forrest Stevens  (stevensf@ucsu.colorado.edu)

Xref: sparky sci.chem:6041 sci.misc:2073 nj.wanted:1101 ny.wanted:644 pa.wanted:230 nj.general:952 nj.misc:414
From: saggarwa@gandalf.rutgers.edu (Sandeep Aggarwal)
Newsgroups: sci.chem,sci.misc,nj.wanted,ny.wanted,pa.wanted,princeton.wanted,nj.general,nj.misc
Subject: Looking for a job
Keywords: Ph.D W/EXPERIENCE LOOKING FOR A JOB
Date: 29 Jan 93 03:59:28 GMT
Followup-To: sci.misc
Distribution: usa
Organization: Rutgers Univ., New Brunswick, N.J.



I am looking for a position of research assosciate/assistant professor.

I am a Ph.D in Organic Chemistry and have synthesized many isoflavanones and 
bile acids.  I have also used modern instrumental techniques for the
elucidation of the structures of these organic compounds.  It may be 
appropriate to mention that during the research I was the first one to 
develop a direct method of synthesizing isoflavanones.  I have also worked
extensively with HPLC and GLC  for the analysis and estimation  of various
bile acids and alcohols in the urine and plasma of patients with cholestic
lever diseases at the University of Medicine and Dentistry of New Jersey
for the past five years.

I also have fifteen years of teaching experience of undergraduate classes
at Delhi University (India).


Suresht Aggarwal.
Newsgroups: sci.chem,sci.misc,sci.bio
From: winalski@adserv.enet.dec.com (Paul S. Winalski)
Subject: Re: Glues from milk?
Reply-To: winalski@adserv.enet.dec.com (Paul S. Winalski)
Organization: Digital Equipment Corporation, Nashua NH
Distribution: usa
Date: Fri, 22 Jan 1993 01:13:14 GMT


In article <1993Jan21.192149.22756@wam.umd.edu>,
cheeze@wam.umd.edu (Joshbo ) writes:
|>
|>I was reading about glues made from milk curd -- casein glue I
|>think it's called.  Basically, I think you add vinegar to
|>warm milk, the milk sours producing the curd, and then the curd
|>is mixed with a base like baking soda and then diluted with
|>water.  Is this correct?  Will this produce a glue like the
|>white glue you buy for children?  What is the chemistry behind
|>this?
|>
|>Also, When this glue dries, I assume it becomes rigid anD inflexible.
|>What can you add to the glue to make it dry flexible -- like a 
|>plastic?  Or, how could I synthesize a flexible plastic of my
|>own if the glue doesn't work?

Casein-based glues are readily available.  The most common brand is Elmer's
Glue, which is made by Borden, the large dairy products company.  You can buy
a tube if you wish to study its behavior as it dries.

--PSW
From: hewitt@vaxc.cc.monash.edu.au
Newsgroups: sci.chem
Subject: Re: more humor <toonces>
Date: 27 Jan 93 08:29:48 +1100
Organization: Computer Centre, Monash University, Australia

What the hell is a 'toonce'?





David Hewitt
Chemistry Department
Monash University

In article <1993Jan24.231121.23744@netcom.com>, howard@netcom.com (Howard Berkey) writes:
> In article <1993Jan22.231758.7421@gw.wmich.edu> 159muehlberg@gw.wmich.edu writes:
>>Another new humor:
>>
>>My organic prof was trying to explain the basics of spectroscopy to
>>our class and one student was simply not understanding the concept
>>behind the effect of the lightwaves on the hydrogen (specifically 
>>NMR).  Dr. B, kind and gentle fellow that he is, asked the
>>student if he had ever cooked anything in a microwave.
>>
>>The student's prompt response was,"nothing except my sister's cat."
>>Rather than reacting (pun wholly intended) violently, Dr. B
>>used the cat as the substance for explanation, ie, how the 
>>microwaves caused the rotation of the H's in the water of the
>>cat to change.  For the entire rest of the lecture, chemical toonces
>>was the topic of conversation...
>>
>>Ellen Muehlberger
>>123muehlberg@gw.wmich.edu
>>"whole-hearted and half-brained"
>>
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Sorry, but this one's going to alt.best.of.internet.  It's a classic.
> 
> -Howard
> -- 
> ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> Howard Berkey						   howard@netcom.com
> 		"I AM the Lizard Queen" - Lisa Simpson
> ... .. ...   ... .. ...   ... .. ...    ... .. ...   ... .. ...   ... .. ...
Organization: Chemistry, Carnegie Mellon, Pittsburgh, PA
Newsgroups: sci.chem
Date: Mon, 25 Jan 1993 14:59:13 -0500 
From: Paul Karol <pk03+@andrew.cmu.edu>
Subject: Re: Technetium

Eric Blom writes...

>The most stable isotope of Technetium has 43 protons and 55 neutrons, neither
>of which complete shells, and neither of which pair spins.  Adding and
>subtracting neutrons puts Technetium father above or below the belt of
>stability.  Technetium was doomed, therefore, to eternal radioactivity.

Then what would you predict for a system with 73 protons and 107
neutrons?  (Half-life > 10^13 years is observed.)

Incidentally, all this chatter about Tc-steel is probably based on the
use of Tc-99m, an abundant long-lived fission product.

Paul J. Karol
 Nuclear Chemist
From: robert@arbo.microbiol.uwa.oz.au (Robert Coelen)
Newsgroups: sci.chem
Subject: soap bubbles
Date: 27 Jan 1993 05:55:44 GMT
Organization: University of Western Australia
NNTP-Posting-Host: mve.microbiol.uwa.edu.au

Dear Chem-netters,

My daughters (aged 5 and 7) have recently purchased a kit to blow bubbles in various
shapes and sizes. They take their bubble blowing seriously and were very disappointed
with the quality of the mixture supplied (i.e. it didn't bubble). I did look for a 
newsgroup which specialised in soap bubbles, but there aren't any. So I am looking 
towards the contributors of this group for a recipe for bubbles. Since I have a wide
range of detergents, etc available in the lab I would be able to accomodate recipes
which go beyond the kitchen sink.

I look forward to receiving some super recipes to make my daughter's next weekend
one filled with bubbles !!


Thank you for your trouble

regards
-----------------------------------------------------------------------------
Robert Coelen                        |     from the land   d        r      !!!
Dept of Microbiology                 |                      o      e
The University of Western Australia  |                       w    d
Nedlands, 6009                       |                        n  n
robert@arbo.microbiol.uwa.edu.au     |                         u
-----------------------------------------------------------------------------
Newsgroups: sci.chem
From: howard@netcom.com (Howard Berkey)
Subject: Re: more humor
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
Date: Sun, 24 Jan 1993 23:11:21 GMT

In article <1993Jan22.231758.7421@gw.wmich.edu> 159muehlberg@gw.wmich.edu writes:
>Another new humor:
>
>My organic prof was trying to explain the basics of spectroscopy to
>our class and one student was simply not understanding the concept
>behind the effect of the lightwaves on the hydrogen (specifically 
>NMR).  Dr. B, kind and gentle fellow that he is, asked the
>student if he had ever cooked anything in a microwave.
>
>The student's prompt response was,"nothing except my sister's cat."
>Rather than reacting (pun wholly intended) violently, Dr. B
>used the cat as the substance for explanation, ie, how the 
>microwaves caused the rotation of the H's in the water of the
>cat to change.  For the entire rest of the lecture, chemical toonces
>was the topic of conversation...
>
>Ellen Muehlberger
>123muehlberg@gw.wmich.edu
>"whole-hearted and half-brained"
>










Sorry, but this one's going to alt.best.of.internet.  It's a classic.

-Howard
-- 
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Howard Berkey						   howard@netcom.com
		"I AM the Lizard Queen" - Lisa Simpson
... .. ...   ... .. ...   ... .. ...    ... .. ...   ... .. ...   ... .. ...
Newsgroups: sci.chem
From: tdunsize@magnus.acs.ohio-state.edu (Todd Dunsizer)
Subject: re: light
Organization: The Ohio State University
Distribution: usa
Date: Fri, 22 Jan 1993 19:18:02 GMT


In response to your question about a chemical reaction to give blue light.

The oxidation of luminol gives an erie blue glow.  This is a common 
demonstration given in freshman lectures.  Luminol is oxidized with hydrogen 
perox unfortunately, i forgoet the chemical name and formula of this compound.
It has been quite some time since I've seen it done.
Newsgroups: sci.chem
From: bhb@fourcroy.chem.wayne.edu (Brent H. Besler)
Subject: Sorry about this but
Organization: Wayne State University Detroit, MI
Date: Thu, 21 Jan 1993 15:27:47 GMT

This is the first test post from the WSU Chemistry Department


Newsgroups: sci.chem
From: tony2@prefect.cc.bellcore.com (gozdz,antoni s)
Subject: Re: Technetium
Organization: Bellcore, Livingston, NJ
Date: Thu, 21 Jan 93 12:57:38 GMT

In article <C16nA6.632@world.std.com> moroney@world.std.com (Michael Moroney) writes:
>staff@rabbit.augs.se (Staffan Friberg) writes:
>
>>In article <1993Jan19.005230.19534@husc15.harvard.edu> blom@husc15.harvard.edu writes:
>
>>> It's not, very.  The iron shields it to a great extent and the fact that it is
>>> in a few ppm means that, used sparingly, Tc-steel would not contribute very
>>> much radiation to the background.  You must remember that not long ago in our
>>> evolution, the background radiation was much higher.  We can tolerate some
>>> 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.
>
>It has one or two isotopes with half-lives around 100 million years (or
>was it 10 million years?)  Regardless, long enough to be useful.
>
>-Mike

Close! t/2 values for Tc-97, Tc-98, and Tc-99, the
three most stable Tc isotopes (out of at least 31
known), are 2.6x10^6, 4.2x10^6, and 2.1x10^5 years. 
They decay by the electron capture, beta-, and beta-
modes, resp. (CRC Handbook of Chem. & Phys. 1992, 12-52).

Tony Gozdz
tony2@cc.bellcore.com