HDTenEightyP/NetNews huggingface dataset:
From: James Petts <pettsj@visigoth.demon.co.uk>
Subject: Re: Synonym in Question?
Organization: No Affiliation
Date: Thu, 13 Aug 1992 06:52:32 GMT
X-Useragent: Nuntius v1.1



In article <92225.51463.LJ10717@LMSC5.IS.LMSC.LOCKHEED.COM> ,
LJ10717@LMSC5.IS.LMSC.LOCKHEED.COM writes:
>I have a history question dealing with the material Silver Nitrate.  Does
>anyone know why the synonym for this material is "Lunar Caustic"?

One reason (probably the sole reason) is the same reason that the
alchemical symbol for 
silver is either an open circle (full moon) or a crescent moon: silver 
was associated by the ancients with the moon, and gold with the sun on 
account of the colour of light of the respective heavenly body.

James

***********************************************************************
***
*    "We use the classical theory on Mondays, Wednesdays and Fridays,    
*   
*     and the quantum theory on Tuesdays, Thursdays and Saturdays."      
*
***************************************** Wm. Bragg
***********************
From: mes10@po.CWRU.Edu (Mark E. Smith)
Newsgroups: sci.chem
Subject: Re: SAP (Super-Absorbent-Polymers)
Date: 19 Aug 92 11:21:50 GMT
Article-I.D.: usenet.1992Aug19.112150.16769
Reply-To: mes10@po.CWRU.Edu (Mark E. Smith)
Organization: Case Western Reserve University, Cleveland, OH (USA)


In a previous article, laetta@uni-paderborn.de (Udo Koerber) says:

>Hi Sci.Chem-Netters,
>
>for a friend of mine without net-access i'm posting
>the following question(s):
>
>The Subject: SAP (Super-Absorbent-Polymers)
>
>1) Is anybody out there prepared for a discussion
>   on that target ?
>2) Can anybody recommend books, papers or any other
>   media with information about SAP's ?
>3) Are there any suggestions for other news-groups
>   where i could post this article
>4) Maybe somebody knows ftp-sites where i can find
>   articles about SAP's ?
>
>That's it for the moment. let's see what happens.
>

I will assume you are referring to hydrogels which are currently an important
component of disposable diapers.  In addition some siloxanes are employed in
oil-spill recovery.  please check the reference section of your local library
for more information.

~Smith
Newsgroups: sci.chem
From: James Petts <pettsj@visigoth.demon.co.uk>
Subject: Re: zeolites
Organization: No Affiliation
Date: Tue, 18 Aug 1992 07:09:48 GMT
X-Useragent: Nuntius v1.1



In article <1992Aug18.020132.23913@lugb.latrobe.edu.au> Graham Vincent,
graham@latrobe.edu.au writes:
>story of the development of zeolites as catalysts. e.g any serendipity
that

There was an article an Scientific America sometime within the last four 
years, I think.

James Petts
********************************************************************
* "We use the classical theory on Mondays, Wednesdays and Fridays, *   
*  and the quantum theory on Tuesdays, Thursdays and Saturdays."   *
************************************** Wm. Bragg *******************
Xref: sparky sci.cryonics:535 misc.legal:16263
From: szabo@techbook.com (Nick Szabo)
Newsgroups: sci.cryonics,misc.legal
Subject: Pre-legal death suspension
Date: 21 Aug 92 10:24:09 GMT
Article-I.D.: techbook.1992Aug21.102409.7797
Organization: TECHbooks --- Public Access UNIX --- (503) 644-8135

In article <1992Aug17.160806.16314@cbnewsl.cb.att.com> kqb@cbnewsl.cb.att.com (kevin.q.brown) writes:

>    In Indiana we had one major advantage:  our patient was not human.  
>One of the biggest problems for cryonics has always been that we cannot 
>schedule suspensions.  Even where a patient is clearly terminal with only 
>days or hours before cardiac arrest, we cannot do anything to hasten that 
>person's entrance into cryonic suspension without being charged with 
>homicide.  Mike's dog Mitzi was certainly in a condition where most pet 
>owners would have had her "put to sleep."  We would, indeed, "put her to 
>sleep" with anesthesia;  but our intention was to drop her temperature 
>until her heart stopped and then proceed down to liquid nitrogen 
>temperature (-320 degrees F or -196 C).

There is at least one state, Michigan, where physician-assisted suicide,
eg that practiced by Jack Kavorkian, is legal.  Has a cryonics
organization considered trying this procedure on terminally ill 
members in places where it is legal?  Have you discussed this issue with 
people in the "right to die" movement?  How are U.S. courts in general
interpreting the recent Michigan case that aquitted Kavorkian?


-- 
szabo@techbook.COM  Public Access User --- Not affiliated with TECHbooks
Public Access UNIX and Internet at (503) 644-8135 (1200/2400, N81) 
Newsgroups: sci.cryonics
From: tsf@CS.CMU.EDU (Timothy Freeman)
Subject: Re: Possible thawing process
Date: Wed, 12 Aug 92 16:30:19 GMT
Organization: School of Computer Science, Carnegie Mellon University
Followup-To: sci.cryonics
	<1992Aug7.235129.18654@cbnewsl.cb.att.com>
	<1992Aug9.225819.26436@isus.UUCP>
Originator: tsf@U.ERGO.CS.CMU.EDU

In article <1992Aug9.225819.26436@isus.UUCP> hoyt@isus.UUCP (Hoyt A. Stearns jr.) writes:

   >My proposal is that we at some point in the freezing process change
   >from a liquid perfusate to a gas (such as helium) which will remain
   >a gas down to LN2 temperatures. 

   How about using superfluidic liquid helium here? (Zero vicosity).

It's not going to stay a superfluid unless the freezing process is
over, since contact with a relatively warm body will make it
evaporate. (That's assuming that the freezing process actually goes
down to liquid helium temperatures, which it currently doesn't.)

--
Tim Freeman <tsf@cs.cmu.edu>    CompuServe ID 71045,2267 checked occasionally.
When they took the fourth amendment, I was silent because I don't deal drugs.
When they took the sixth amendment, I kept quiet because I know I'm innocent.
When they took the second amendment, I said nothing because I don't own a gun.
Now they've come for the first amendment, and I can't say anything at all.
Newsgroups: sci.cryonics
From: kqb@cbnewsl.cb.att.com (kevin.q.brown)
Subject: Re: Possible thawing process
Organization: AT&T Bell Laboratories
Date: Thu, 13 Aug 1992 22:44:00 GMT
X-Crossposted-To: cryonics mailing list

    ------------------------ Forwarded Message ------------------------

Date: Wed, 12 Aug 1992 17:40 MST
From: MVOELKER@CCIT.ARIZONA.EDU
Message-Subject: Re: cryonics: #1130 - #1135

Using superfluid helium as a perfusate during cooldown won't work, because
helium only becomes a superfluid (and thus frictionless) at temperatures of
less than 2K or so (I can't remember the exact temperature). While this
temperature may be raised by increasing the pressure, I don't think the
helium phase diagram will allow superfluidity at anything near 77K for any
pressure. Creative idea though! ---Mark Voelker
From: novak@isrc.sandia.gov (James L. Novak)
Newsgroups: sci.materials
Subject: Composites and electromagnetic impedance
Date: 21 Aug 92 13:36:41 GMT
Article-I.D.: isrc.1992Aug21.133641.360
Organization: Sandia National Labs, Org. 1600, Albq., NM

I saw an article in NASA Tech. Briefs (Aug 92) about some work being done to
monitor the cure state of composite resins using electromagnetic imaging.
This looks like it may have application to one area of work here.

Unfortunately, the article indicates that no further information is 
available.  Can someone point me to 1) references by the authors below
or 2) e-mail or phone addresses of any one of the authors so I can get
additional information?

"Monitoring Polymer Curing via Electromagnetic Impedance", NASA Tech. Briefs, Aug 92,
William Freeman and John C. Covington @ NASA Langley and David Kranbuehl, Melanie Hoff,
and Susan Delo? at College of William and Mary.

Jim L. Novak
Intelligent System Sensors and Controls
Sandia National Laboratories
(505) 844-4227

jlnovak@isrc.sandia.gov
From: 5916rahmank@vms.csd.mu.edu
Newsgroups: sci.materials
Subject: What is the number for hopping distance?
Date: 17 Aug 92 19:35:54 GMT
Article-I.D.: vms.0095F3B2.0B051B20
Reply-To: 5916rahmank@vms.csd.mu.edu
Organization: Marquette University - Computer Services

Hi,
	I like to ask this question. In many papers it is mentioned that
	'hopping of electrons' (or polarons) is an important mechanism
	of conduction in many chalcogenide glasses. What was not easy to
	find is a quantitative figure for the distance of such hopping
	process. 

	Would somebody please direct me toward references that quantifies
	hopping distance for glasses. Any help deeply appreciated.
	Thanks,
		Anis Rahman
		EECE (Materials group)
		Marquette University.
Newsgroups: sci.materials
From: bill@wsuaix.csc.wsu.edu (William E. Johns;S23015)
Subject: Re: dissolving nylon-6 and/or nylon-66
Organization: Washington State University
Date: Fri, 21 Aug 92 16:18:00 GMT

In article <x-jytdh@rpi.edu> vasisn@rpi.edu writes:
>
>	I'm looking for a solvent or a combinations of two compatible solvent that would dissolve PET, nylon-6 and -66 without chemically degrading the material. 
>	would any one happen to have info in this regard? 
>
>niraj vasishtha
>vasisn@rpi.edu 
>

Yep, try furfuryl alcohol.  Heat it gently, without flame.  I have dissolved
any number of different nylons in the stuff--a great solvent for this type
of polymer.

Enjoy,

Bill
________________________________________________________________
bill@wsuaix.csc.wsu.edu if you feel compelled to send email
johnsw@wsuvm1.csc.wsu.edu if you seriously expect an answer
AMA #500924   DoD #00314   WMTC #0002   SR= 2.125
FJ1200 R100GS/PD 740GLE  KotV KotRR KotD #0001  :-)
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

If you understand, things are just as they are;
If you do not understand, things are just as they are.
                                                        Zen verse
Newsgroups: sci.materials
From: cptully@med.unc.edu (Christopher P. Tully,Pathology,62679)
Subject: Re: Insulator with good heat conductivity
Reply-To: cptully@med.unc.edu
Organization: UNC-CH School of Medicine
Date: Tue, 18 Aug 1992 17:49:31 GMT

In article 1629@fs7.ece.cmu.edu, snyder@henry.ece.cmu.edu (John Snyder) writes:
>>>What is a good material (good=price + availability) which is
>>>an electrical insulator and a good conductor of heat?
>>>
>>>It will be used at temperatures as low as 4.2 Kelvin and it needs
>>>to hold up to about 200 volts / mm, heat conductivity needs to
>>>be comparable to copper.  Does it exist?
>>>
>>>Note: Diamond may be ideal but not practical!


Why isn't diamond practical?  I know for a fact that it can be generated in almost any size/shape you want (I've personally seen some odd ones).  Admittedly, it is not necessarily cheap, but if you ask the right people REAL nice, and only need one or two of what ever it is you want, they MIGHT give it to you or sel for cheap.  I know that most of the Japanese companies involved in CVD Diamond research have facilities that spend a large fraction of their time just seeing what sizes/shapes they can produce. 




 Start reading DDS&T and similar journals to get names and addresses.

Chris Tully (cptully@med.unc.edu)
From: pollack@ucunix.san.uc.edu (Steven Pollack)
Newsgroups: sci.materials
Subject: Re: dissolving nylon-6 and/or nylon-66
Date: 21 Aug 92 21:49:43 GMT
Organization: University of Cincinnati

In article <1992Aug21.161800.4727@serval.net.wsu.edu> bill@wsuaix.csc.wsu.edu (William E. Johns;S23015) writes:
>In article <x-jytdh@rpi.edu> vasisn@rpi.edu writes:
>>
>>	I'm looking for a solvent or a combinations of two compatible solvent that would dissolve PET, nylon-6 and -66 without chemically degrading the material. 
>>	would any one happen to have info in this regard? 
>>
>>niraj vasishtha
>>vasisn@rpi.edu 
>>
>
>Yep, try furfuryl alcohol.  Heat it gently, without flame.  I have dissolved
>any number of different nylons in the stuff--a great solvent for this type
>of polymer.
>
>Enjoy,
>
>Bill
>________________________________________________________________
>bill@wsuaix.csc.wsu.edu if you feel compelled to send email

For all three, the best thing going is hexafluoroisopropanol.  It
dissolves the nylons and PET.  It is expensive.  But it works.  We have
done molecular weight analysis via GPC in this stuff, bu the solvent was
donated.  Cost about $4K / gallon!!!



_______________________________________________________________________
Steven K. Pollack               |
University of Cincinnati        |
Department of Materials Science |   I notice that you are still
  & Engineering                 |   using polymers!
498 Rhodes Hall  ML#12          |     - Lt. Commander Montgomery Scott
Cincinnati, OH 45221-0012       |       U.S.S. Enterprise
spollack@ester.mse.uc.edu       |
________________________________________________________________________
Newsgroups: sci.materials
From: swami@chtm.eece.unm.edu (Swami srinivasan)
Subject: Gallium Nitride in cubic form?
Date: Tue, 18 Aug 92 20:41:00 GMT
Organization: University of New Mexico, Albuquerque
Followup-To: swami@chtm.eece.unm.edu

Thanks to Chris Parks and others for the info. on GaAs
superconductivity.

I have a totally unrelated question here.. 

People have been working on GaN/AlGaN for some time now. The hope is
that we can have semiconductor light sources in the Blue/Violet/UV some
day, especially since AlGaN is supposed to have a direct band-gap all
the way uptil AlN. 

	The main problem with the material system so far has been the
unintentional doping of more than 1xE18/cc. Also, it is difficult to
grow good quality bulk GaN, or so I heard. The high vapor pressure of 
is the culprit. 

	Besides, the GaN crystal has a hexagonal symmetry, unlike
cubic GaAs, InP, ZnSe, etc. 

	Here's my question - is there a way to find a suitable 
substrate or growing conditions whereby GaN can be grown cubic? If
there are any references, please do send me the information. BTW,
the reason i ask is that i recall someone having said that it was
possible. 

	Also, there might be some solutions to the other two problems,
of which the first, i.e., unintentional doping, is already being 
mitigated. Dr.Kolbas at NCSU has been working on this, and I'm sure
a few others are, too. Are there any better substrates than Sapphire,
which is the most common one? 

	Thanking y'all,
							 swami

=====================================================================
swaminathan srinivasan
center for high tech materials
eece,university of new mexico
albuquerque, nm 87131			swami@chtm.eece.unm.edu
=====================================================================
From: rosentha@bldrdoc.gov (Peter Rosenthal 303-497-5844)
Newsgroups: sci.materials
Subject: Re: Insulator with good heat conductivity
Date: 14 Aug 92 16:21:30 GMT
Organization: National Institute of Standards and Technology

In article <1992Jul28.075319.9973@fs7.ece.cmu.edu> snyder@henry.ece.cmu.edu (John Snyder) writes:
>In article <7926@dirac.physics.purdue.edu> parks@gibbs.physics.purdue.edu (Chris Parks) writes:
>>
>>What is a good material (good=price + availability) which is
>>an electrical insulator and a good conductor of heat?
>>
>>It will be used at temperatures as low as 4.2 Kelvin and it needs
>>to hold up to about 200 volts / mm, heat conductivity needs to
>>be comparable to copper.  Does it exist?
>>
>>Note: Diamond may be ideal but not practical!


>Sapphire has been mentioned to me as such a material.  You do not mention in
>what form: shape, size this material must be or how much of it you need.  
>I believe that you can get man-made sapphire substrates.  They are probably
>not cheap, but surely cheaper than diamond.
>

Actually, Sapphire is quite cheap.  A polished two-inch wafer costs
about 125 bucks.  It is used in UHV viewports up to at least 4 inch 
diameters.  Berylium oxide is another option.  Not transparent, but
a great heat conductor.  Deadly toxic though.

Peter Rosenthal


-- 
Peter Rosenthal       Email rosenthal@cmg.eeel.nist.gov
From: parks@dirac.physics.purdue.edu (Chris Parks)
Newsgroups: sci.materials
Subject: Re: Superconducting Gallium Arsenide... what's the latest?
Date: 14 Aug 92 14:00:14 GMT
Organization: Purdue Univ. Physics Dept, W.Lafayette, IN

In article <92227.133615IFF291@DJUKFA11.BITNET> IFF291@DJUKFA11.BITNET (Stephan Petersen) writes:
Concerning superconductivity in LT-GaAs ...
>Could anybody give me a complete reference for this Science Mag. and the
>original Phys. Rev. Lett. article?
>Stephan
I have located the original article and some comments on the validity 
of the claim in PRL.

See:
Phys. Rev. Lett., Vol. 66, pg. 3079 (1991)     <- original article
Phys. Rev. Lett., Vol. 68, pg. 551,552 (1992)  <- comments and 
                                                  almost-retraction

Chris Parks
parks@physics.purdue.edu
Newsgroups: sci.materials
From: diekman@tw2.iw.uni-hannover.de (Uwe Diekmann)
Subject: Adsorption of hydrocarbon vapour to metal surfaces
Reply-To: diekman@iw.uni-hannover.de
Organization: Sun Microsystems, Inc.
Date: Thu, 20 Aug 1992 07:28:30 GMT

I need information about the adsorption of hydrocarbons from gasoline vapour to metal (eg steel, aluminum)
surfaces. 
If you take a closed box made of blank metal filled with air and gasoline vapour, how much of
this vapour will adsorb to the metal surface, so that the concentration of hydrocarbons in the air decreases ?

Thanks, 
       Uwe Diekmann


Newsgroups: sci.materials
From: raicu@netcom.com (Eugen Raicu)
Subject: free 11/88-12/91 issues of MRS Bulletin
Date: Mon, 17 Aug 92 04:19:22 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Distribution: ba

If interested, you will need to pick them up from downtown Berkeley.
Send me email or call me at (510) 644 3204.
-- 
Eugen Raicu
raicu@netcom.com
From: stevem@col.hp.com (Steve Meyer)
Newsgroups: sci.materials
Subject: Re: Thick film group
Date: 17 Aug 92 15:58:54 GMT
Organization: HP Colorado Springs Division


I do not know of a group, but I would be interested in finding out 
if there is one also.  I have been involved in Hewlett Packard's 
small thickfilm/hybrid manufacturing area for about 8 years now.
(My background is metallurgy; I don't use that too often anymore.)

                                       - steve meyer -
                                        
                                      
Newsgroups: sci.materials,trial.rec.metalworking
From: nahabed@ntmtv.UUCP (Roupen Nahabedian)
Subject: ISRI
Originator: nahabed@nmtvs296
Keywords: ISRI 
Reply-To: nahabed@ntmtv.UUCP (Roupen Nahabedian)
Organization: Northern Telecom Inc, Mountain View, CA
Distribution: usa
Date: Tue, 18 Aug 1992 17:33:56 GMT

Looking for information about a Wash.D.C. based
organization with the achronyms.: ISRI which I
understand is a "standrds body" for metals...
I would greatly appreciate any phone/fax/address 
information for this organization...

Thanks in advance,
Roupen Nahabedian
UUCP:    ames!ntmtv!nahabed  or nahabed@ntmtv.UUCP             
ATTMAIL: monasa@attmail.com              
ARPANET: ntmtv!nahabed@ames.arc.nasa.gov
Newsgroups: sci.materials
From: bill@wsuaix.csc.wsu.edu (William E. Johns;S23015)
Subject: Re: High Vacuum Epoxy
Organization: Washington State University
Date: Fri, 21 Aug 92 01:12:36 GMT

In article <1992Aug20.154626.20676@dirac.physics.sunysb.edu> danube@dirac.physics.sunysb.edu (Dan Koller*) writes:
>
>   Does anybody know the absolute ultimate lowest obtainable outgass
>rate of Varian's "Torr-Seal" high vacuum epoxy?  Varian Spec. sheets 
>only list confusing figures, after short 130 degree bakeouts.  I would
>like to know if baking out for a week or so at 130 deg. C will help
>bring the outgass rate below 10e-8 Torr-liter/cm^2/second.
>   I would like to use the epoxy to seal sapphire windows to a small
>(1 cm^3) glass chamber, pump it down to better than 10e-7 torr, and then
>seal it off.  The problem is that the epoxy seems to be outgassing at
>a rate high enough to bring the pressure to 1 mTorr in a minute or so.
>This is to be expected from Varian's published outgass rates, but my
>question is, can I do better?
>   Finally, if epoxy won't work, is there a better way of attaching 
>sapphire or Silicon windows to glass?
>   Thanks in advance.
>							Danube

It has been awhile since I worked on a vacuum bench, but I am
reasonably sure that someone makes a special wax that can be
used for gluing things together.  This wax was designed for
high vacuum work.  I have no idea where you can get it.

Ride Free,

Bill
________________________________________________________________
bill@wsuaix.csc.wsu.edu if you feel compelled to send email
johnsw@wsuvm1.csc.wsu.edu if you seriously expect an answer
AMA #500924   DoD #00314   WMTC #0002   SR= 2.125
FJ1200 R100GS/PD 740GLE  KotV KotRR KotD #0001  :-)
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

If you understand, things are just as they are;
If you do not understand, things are just as they are.
                                                        Zen verse
From: 5916rahmank@vms.csd.mu.edu
Newsgroups: sci.materials
Subject: Thick film group
Date: 14 Aug 92 20:26:39 GMT
Article-I.D.: vms.0095F15D.A2B7E120
Reply-To: 5916rahmank@vms.csd.mu.edu
Organization: Marquette University - Computer Services

Hi,
	Is there a group that discuss the ceramic materials
	(not superconductors) specially aspects of thick film
	technology? Can any one direct me towards such a group
	(or similar to it)? Thanks in advance.

	-Anis Rahman
	EECE (Materials group)
	Marquette University
Newsgroups: sci.materials
From: vasisn@vccsouth30.its.rpi.edu (Niraj Vasishtha)
Subject: dissolving nylon-6 and/or nylon-66
Reply-To: vasisn@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Fri, 21 Aug 1992 15:14:39 GMT


	I'm looking for a solvent or a combinations of two compatible solvent that would dissolve PET, nylon-6 and -66 without chemically degrading the material. 
	would any one happen to have info in this regard? 

niraj vasishtha
vasisn@rpi.edu
From: IFF291@DJUKFA11.BITNET (Stephan Petersen)
Newsgroups: sci.materials
Subject: Re: Superconducting Gallium Arsenide... what's the latest?
Date: 17 Aug 92 06:57:38 GMT
 <92227.133615IFF291@DJUKFA11.BITNET> <8062@dirac.physics.purdue.edu>
Organization: KFA  Forschungszentrum Juelich

In article <8062@dirac.physics.purdue.edu>, parks@dirac.physics.purdue.edu
(Chris Parks) says:
>
>See:
>Phys. Rev. Lett., Vol. 66, pg. 3079 (1991)     <- original article
>Phys. Rev. Lett., Vol. 68, pg. 551,552 (1992)  <- comments and
>                                                  almost-retraction
>
>Chris Parks
>parks@physics.purdue.edu

Thanks for the references!

Stephan




+------------------------------------------------+
| Stephan Petersen                               |
|                                                |
| Bitnet/EARN: IFF291@DJUKFA11                   |
| Internet:    IFF291@zam001.zam.kfa-juelich.de  |
+------------------------------------------------+
Newsgroups: sci.materials
From: sth@slipknot.mit.edu (Scott Hannahs)
Subject: Re: Insulator with good heat conductivity
Organization: Massachvsetts Institvte of Technology
Date: Wed, 12 Aug 1992 23:01:50 GMT

<Lots of arguments about BeO deleted>

As a low temp kind o' guy, why not use copper with a covering of
cigarette papers.  Every cryogenic tool kit has a set of rolling papers.
You can hold them in place with the standard GE varnish (7031).  This
has a breakdown voltage of several (~200-300) V/mil (that's 0.001 inch).

The easiest way to get thermal conductivity is to make the insulator
much thinner.  The problem you might have at high voltage is the ease
with which He gas breaks down.  There is a minimum in the breakdown
voltage around 10 torr and so make sure your leads are well insulated
above the liquid near the top of the cryostat.

Scott Hannahs, F. Bitter National Magnet Lab, sth@slipknot.mit.edu

Newsgroups: sci.materials