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'[ot]:Gas Chromatography,-- Here's a weird one for '
2000\11\14@221309 by rad0

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Hello Good People!

Well, this is an odd question, but...

Many years ago, I saw an article in Scientific American about
someone, somewhere who was going to etch a gas chromatograph
device into silicon, I guess for miniaturization purposes.  Does a modern
day, contemporary, device such as this exist??

I dropped Sci. American about the time they had a cover story emblazoned
with the notion that protons 'might' appear/create themselves,
'spontaneously'
in 'space', even I knew this was wrong.

Well, colledge physics was confusing and I never did pick up this magazine
again to see if this little machine had been created.  So,if you know of
such
a thing, please let me know where I might find something like this, I want
to
hook it up to a pic to sort of make an analysis machine,


--thanks

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2000\11\14@224818 by Tom Messenger

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At 09:13 PM 11/14/00 -0600, you wrote:
>Hello Good People!
>
>Well, this is an odd question, but...
>
>Many years ago, I saw an article in Scientific American about
>someone, somewhere who was going to etch a gas chromatograph
>device into silicon, I guess for miniaturization purposes.  Does a modern
>day, contemporary, device such as this exist??

Yes. You'll have to search the net for info but companies have been working
on this concept. Some refer to them as a "silicon nose".

>
>I dropped Sci. American about the time they had a cover story emblazoned
>with the notion that protons 'might' appear/create themselves,
>'spontaneously'
>in 'space', even I knew this was wrong.

What makes you think so?

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2000\11\14@235632 by David VanHorn

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>>I dropped Sci. American about the time they had a cover story emblazoned
>>with the notion that protons 'might' appear/create themselves,
>>'spontaneously'
>>in 'space', even I knew this was wrong.


Ever hear of quantum foam?  You're soaking in it!
:)

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2000\11\15@035728 by robsymmans

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I recently read about some SAW (surface acoustic wave ??) devices that had a
membrane coating applied. The membrane was designed to absorb specific
chemicals,this would then affect the propagation speed of a signal across
the SAW, the difference in speed being proportional to the concnetration of
the absorbed chemical.
Not sure where I read about this. Its not really like a g/c, because I think
the SAW devices were designed to measure only a single chemical type. I
think one application was to use a set of different SAWs for detecting drugs
on the breathe or car drivers (alcohol / pot ??)

rob


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