Jim,
I guess everything is permiable or porous to something. :o)
Dan
On Fri, 25 Feb 2000 01:44:20 -0500, James H. Nazarian, Ph.D. wrote:
> Hi Dan,
>
> I won't keep it going either, but latex rubber is not semipermiable. A
molecule
> as small as hydrogen can pass right through the lattice structure of most
solids
> because of its extremely small size. The material could be porous to
hydrogen as
> most things are or helium as many things are, but it is not semipermiable
and
> does not support osmosis. That is still the nearly exclusive province of
> biological membranes. GoreTex almost fills the bill, but not quite.
>
> Jim
>
> Dan Dwelley wrote:
>
> > OK... I won't keep the argument going but I will say...I do remember
from
> > chemistry classes that rubber including latex is considered
semi-permiable.
> > Keep in mind, this doesn't mean it'll leak everything! It simply means
that
> > if a molecule of some substance is small enough, it has the ability to
pass
> > through the semi-permiable layer...how fast it can do that is another
issue.
> > So...do they leak?...yes and no. The likelyhood of a water molecule
passing
> > through the lines...I highly doubt it...the molecule is too big.
> >
> > As an example, you can take a helium balloon and a water balloon. The
water
> > will not leak out of the balloon after setting for a few days BUT the
helium
> > ballon will loose its helium volume after a few days...that is due to
the
> > helium passing through the semi-permiable layer.
> >
> > Class dismissed. :o))
> >
> > Dan Dwelley
> > 77 Midget
> > Alexandria, Va.
> >
> > On Thu, 24 Feb 2000 14:41:01 EST, Ajhsys@aol.com wrote:
> >
> > > In a message dated 2/24/00 2:36:27 PM Eastern Standard Time,
> > microdoc@apk.net
> > > writes:
> > >
> > > << I think it is our duty to foster this debate, and propose that we
> > change
> > > the MG
> > > slogan from "Safety Fast" to "Safety Fast... and never stop arguing
> > about
> > > brake
> > > fluid." ;^) >>
> > >
> > > - - - - - - - - - - - - - - -
> > >
> > > I'm stopping this discussion. You win.
> > >
> > > As I said before, Ya pays yer money and ya takes yer chances. Mine
go
> > with
> > > Castrol LMA.
> > >
> > > Allen Hefner
> > > SCCA Philly Region Rally Steward
> > > '77 Midget
> > > '92 Mitsubishi Expo LRV Sport
> >
> > Dan Dwelley
> > 77 Midget
> > Alexandria, Va.
> >
> > _______________________________________________________
> > Get 100% FREE Internet Access powered by Excite
> > Visit http://freeworld.excite.com
>
Dan Dwelley
77 Midget
Alexandria, Va.
Get 100% FREE Internet Access powered by Excite
Visit http://freeworld.excite.com
|