National Institute of Advanced Industrial Science and Technology (AIST) This page is a page of the former research institute. We stopped updating on March 31.2001.
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Amount of Substance Standard

This is defined as the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilograms of carbon-12. Research of the standard amount of substance is carried out at NRLM using various methods, such as the Avogardo number quota.



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