recently, the effects of antimicrobial activity of silver nanoparticles was considered by researcher because of bacterial resistance to antimicrobial agents in chemical.the aim of this study was to evaluate the antimicrobial activity of the gold nanoparticles on escherichia coli. gold nanoparticles are chemically synthesized. standard strain of e. coli was cultured in a nutrient broth. minimum ...

The gold standard was quite stable in the past: price level changes were relatively small, and trade cycles mild. However, its past stability does not guarantee nowadays. We show that of to shocks stemming from world market depends critically on size monetary stock relative extent these shocks. Every change decreasing lowers stability. discuss some consequences thesis too: first, any system eco...