Natural Science Forum

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solvent such as ethanol? I know how to do it but was wondering if
there was a preferred set of conditions to minimze the production of

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We have available 5 kg of this material as surplus. 95+ % purity. Was
made for a customer who no longer uses it. Potential uses include a
water soluble spray reagent for amino acids, an analytical reagent for
ammonia and other primary amines, a component for the ligand Salen

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Special issue on Optical SuperComputing
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qPCR Newsletter - October 2008
Dear researcher,
dear Gene Quantification page reader,
Our newsletter informs about the latest news in quantitative real-time

I recently repacked my first battery (laptop). Simply replaced the 4
Ni-mhs with new batteries (3.7V Ni-mh 2600mah).
After it was done, it did not work.
There was a component between cells 2 and 3

i´m going to prepare my own 3-terminal electrochemical cell for CV and
EIS Measurments. I´m wondering what material for the working and
counterelectrode are suitable. I know that platinum is widly used, but
it is very expensive. What about stainless steal or gold (wouldn´t be

An explosion has occurred in my flashlight, powered by two CR123 - 3V -
unprotected & rechargeable battery.
The flashlight is a waterproof one, and the bulb is a led.
Of course, the explosion was accurred when the flashlight was ON.

I started pulling data on raw cells, taking different cells from each
vendor and putting them on a 1.5A CC load as a starting point, before
trying the CP load.
Interestingly, there's a rather large dip in the voltage at the

Is there an easy and cheap way to make liquid chlorine in sufficient
quantites to treat a 50,000 gallon pool?
Now, kiddies, go ahead and say buy it.
How about chlorine gas?  I am aware of the dangers.

I know that the charge carriers in metallic conduction travel at the speed
of light - but at what speed do the ions travel at in the case of ionic
conduction?

I am having trouble understanding the H NMR for 5-norbornene-2,3-
dicarboxylic anhydride (to see it, please see:
http://www.aist.go.jp/RIODB/SDBS/cgi-bin/direct_frame_top.cgi?lang=eng).
To begin with, I don't understand why H's D and E are labelled as non-

I am trying to brominate an ortho-allyl bisphenol at the allylic
position. I have tried 2 eq of NBS in CCl4 at reflux using either
incandenscent light or benzoyl peroxide as an initiator. the reactions
were performed under an argon atmosphere. The reaction seems to have

Those of you who have used LAH in THF a lot, would you give me practical
advice on its applications?
What I'm getting at is this:
I've run many Grignard reactions and the cautions I've found are generally

I am having trouble figuring out the difference in products when an
alkyne is treated with KmNO4 (and acid)
and when an alkene is treated with the same.
Also, what is a goos way to tell by inspection what substances will

would you use Mg turnings, powder or ribbon?  does it matter?
"Dave Munzuno" <munzuno@charter.net> wrote in message
news:d6hepe$a7c$1@ikaria.belnet.be...

Andy,
Okay, I spent quite a few hours on this and I know it's wrong, but I did the
work and I'm going to post it.
Let me make it clear, I'm an undergrad finishing my first semester of