109同位素银和107同位素银在新世界银的比例要比来自欧洲的银币高很多。
The ratio of the silver-109 isotope to silver-107 turned out to be much higher in New World silver than in the European COINS.
银采用高电流密度电解精炼，产品银纯度达到99.99%。
Electrolysis refining of silver adopts high current density. the purity of the silver products reaches 99.99%.
叙述了裁银饮水杀菌技术，如高比表面载银活性炭，高比表面载银氧化铝等的研究与开发。
The current research and development of bactericidal technic with silver, such as high surface area activated carbon with silver, high surface area aluminium oxide with silver etc. are summarized.
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