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April 2000

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Subject:
From:
peter blokhuis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 20 Apr 2000 10:36:30 -0700
Content-Type:
text/plain
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text/plain (75 lines)
Thank you for your response Steve, what about the
second method of measuring surface tension?

As for the stalagmometer, do you think this analysis
is not worthwhile/too unreliable?

Peter Blokhuis

--- Steve Collins <[log in to unmask]> wrote:
> Stalagmometer
> Surface tension has long been recognized as an
> important physical characteristic
> of fluids and colloids that can affect biological
> processes.
> Scientists sought ways to measure this phenomenon,
> but reproducible results were
>  difficult to obtain. Two approaches, developed to
> measure this subtle force,
> are displayed here.
>
> The process of drop formation by liquids is, in
> part, controlled by the surface
> tension of the fluid. To determine surface tension,
> the stalagmometer used a
> drop
> weight method, in which the number and weight of
> drops were compared to those
> from a reference liquid. Seemingly simple, the
> stalagmometer nevertheless
> required considerable skill and absolute cleanliness
> for readings to be
> meaningful.
>
>
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