Ag+ is a silver atom that has lost an electron giving it a positive charge of 
one.
This means that it has united with something else, such as sulfur, nitrate 
chlorine
or whatever and has formed a compound.  Compounds of silver can cause argyria by
the same mechanisms that photography uses.  Apparently compounds of silver are
antibacterial, but not nearly as much so as pure silver metal in the colloidal
state.

Ag0 would have no charge on it, and is a clump of silver atoms. They are not
combined with anything.  Metallic silver is used in water purification systems,
burn bandages and of course is the element in CS.

Marshall

Wayne Fugitt wrote:

> Evening Marshall,
>
>  >>that was based in fact.  However after reading it, it seems apparent
> that the
> >author has not the foggest idea of the difference between Ag0 and Ag+.  All 
> >of
> >the mechanisms he gave for silver resistance were specific for Ag+.  But then
> >he continued and stated that this resistance is being selected for by uses of
> >products that are Ag0. Not likely.
>
>     Well..... I don't either.
>
>     Can you explain that with a bit more detail or provide a link that
> explains it.
>
>     Or.... if you think it is too technical for us non-chemist, I would
> like to know that also.
>
>     I think I halfway understand the difference, but not clear enough to
> make a statement about it.
>
>     Wayne
>
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