TL;DR: The effect of oligodynamic silver on organisms was first described in 1869 and since then it has frequently been reported that silver added to water as a colloidal suspension, by filter beds or electrolytic devices, has greater bactericidal efficiency than an equivalent amount of silver added as silver nitrate as discussed by the authors.
Abstract: THE effect of oligodynamic silver on organisms was first described in 1869.1 Since then it has frequentlybeen reported that silver added to water as a colloidal suspension, by filter beds or electrolytic devices, has greater bactericidal efficiency than an equivalent amount of silver added as silver nitrate. The results of most of the work have been unsatisfactory. There has been a need to: (1) improve the methods for determining silver in low concentrations; (2) recognize, and compensate for, the silver adsorbed by surfaces ; (3) devise a method for removing toxic silver residuals from equipment; (4) find neutralizers of proved capacity to arrest not only bactericidal but also bacteriostatic action; and (5) provide satisfactory controls.
TL;DR: In this paper, a nanosized silver powder is prepared by using sodium formaldehydesulfoxylate (SFS) as reducing agent in acidic pH, typically between 1 and 5.
TL;DR: The results suggest formation of a complex between silver(I) and hydrazine, decomposes in a rate-determining step, leading in the formation ofA free radical, which again reacts with the silver (I) in a subsequent fast step to yield the products.