Date: Tue, 3 May 2011 08:17:56 -

Author: --- Paul

Subject: Re: Mouthing LN2 Re(2): Liquid Nitrogen and Ice cream

Post:

We need a "like" button on here, David.

On May 3, 2011, at 8:04 AM, David Sturm wrote:

> Chuck: No, please no. Sipping LN2 is just too risky. A cough, a trip,
> and that you can't control nearby people, make it an uncomfortable
> issue. And spitting it out at people creates so many unpredictable
> trajectories.
>
> Sorry, but I would never sanction or recommend this to any colleague.
> I'd even leave the stage if it were attempted...
> even if it creates hard feelings and anger and leaves someone
> annoyed with me forever and costs me a grant or two down the road.
>
> Using shortbread cookies or graham cracker gets the same
> general vapor-out-the-nose effect. Or modifying a small thermos
> bottle so there is a permanent hole for air escape, and then using
> the normal spout to breathe in water vapor condensing off the top
> of some LN2.
>
> Much safer and controllable ways.
>
> David
>
> tap-l@lists.ncsu.edu writes:
>> DEFINITELY not a good idea if you have paranoid Bio Prof's in the
>> area or if you don't keep your research dewars clean.
>>
>> _*I*_ worry a lot more about bio hazards than cryogenic hazards.
>> But - familiarity breeds.
>>
>> Gimma nice cool sip of LN2 anytime.
>> (Keep your mouth wet, use a styrofoam cup and DON't swallow!!!)
>> It WON't crack your teeth - in spite of what Jearl Walker will say)
>
> **Physics Days at Funtown/Splashtown USA May 19-20, 2011
> ====================================================
> David E G Sturm - sturmde@maine.edu - 1.207.581.1241
> --Physics & Astronomy Instructional Laboratories
> --Bennett Hall Lecture Demonstration Facilities
> --Mainely Physics Road Show --PIRA Past President '09-'10
> Dept of Physics & Astronomy -- University of Maine
> 5709 Bennett Hall -- Orono ME 04469-5709
> http://www.physics.umaine.edu/
> =============================================
>



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