Hm. I see what you are saying, but I did not think that osmosis was due
to solvency- but you are making sense. I am aware of the size factor
in osmosis, but it seems that there are other chemical reactions or
interactions going on that contribute to something being absorbed by
the body, that can not be described satisfactorily by size alone. Take
brain chemicals, for instance, there are many receptors etc that enter
into the equasion in both the gut and the brain. I was under the
impression that dmso is a different kind of solvent than either water
or oil, as something in water will not penetrate the skin in the same
way as when in dmso, ditto for oil. So dmso has a unique property that
carries it into the skin.
I also thought that osmosis inside the body is somewhat mysterious, as
there is a size factor, but I don't think that explains all of it.
Reverse osmosis is solely a size filter, I thought.
Are you saying that you can dissolve something completely in dmso, and
it will still be too large to be absorbed through the skin? is this due
to pore size, or something else?
On Jan 16, 2008, at 1:59 PM, Marshall Dudley wrote:
I think you will find that the inability of a solvent to convey a
solute which is greater than a certain molecular size is well
documented. Look at osmosis an reverse osmosis. That is the name
given to this action. Molecules greater than a certain size simply
cannot cross a membrane barrier and get left behind. The question is
not if it will happen with DMSO, but rather what sized molecules can
penetrate the barrier, usually the skin for what we are talking about.
It is easy to prove that large molecules in DMSO will not be absorbed
into the body. Take a really big molecule, such as a 1/4 carat
diamond, and put it into dmso. Then see if it will go through the
skin. If you try it, you will find that it will just sit there.
Marshall
Clayton Family wrote:
I used to work for a horse vet, and he told me that it is a potent
solvent, which is why it is so useful as a topical agent to carry
medications for horses and other animals. He suggested I use gloves
to handle it, as it carries lots of things inside the body with it
when it goes, and he felt it was necessary to clean the area of the
animals skin well before applying it. Since he had the practical
experience dealing with it
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