Several studies I have seen attribute most, if not all, of the antimicrobial activity of silver particles to the formation of silver oxide on the particle in the bloodstream. One example:
http://www.fpl.fs.fed.us/documnts/pdf2004/fpl_2004_dorau001.pdf "Note that all these mechanisms relate to solvated silver ions, Ag+. The antibacterial properties of any metal come from its ions, which are generated from the neutral metal (1 5). In the presence of oxygen, metallic silver can be bactericidal because silver (I) oxide is soluble enough to release free silver ions (18). When dealing with metallic silver, though, it is important to note that antimicrobial activity depends on the extent of the active silver surface." Would it not then be desirable to form silver oxide on the particles that do form in EIS? - Steve N -----Original Message----- From: Ode Coyote [mailto:[email protected]] Sent: Wednesday, March 10, 2010 7:28 AM To: [email protected] Subject: Re: CS>Silver Meter ...text omitted... ["Color" part not true, but particles do reflect light and ions don't. Although particle size can have an effect on color and numbers/density on depth of color, it's more an indication of the chemical composition of the majority of particles. If the color is yellow to brown to black, it mostly means that you have silver oxides in the water and the best way I've found to do that is to use too much current over too small electrodes..you can actually see the oxides being formed in the water rather than nearly all of it being stuck on the electrode that gets black as a "golden mist"] Ode -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:[email protected]?subject=unsubscribe> Archives: http://www.mail-archive.com/[email protected]/maillist.html Off-Topic discussions: <mailto:[email protected]> List Owner: Mike Devour <mailto:[email protected]>
