The average percentage of ash in 27 assays of Assam coal was 3.8 as against 16.3 in 17 assays of Raniganj coal.
While he held this office, Newton drew up a very extensive table of assays of foreign coins, and composed an official report on the coinage.
A positive in one of these assays results in the compound being considered as an in-vivo mutagen.
However, due to variable secretion of hGH, as well as hGH production in response to stress, exercise, or other factors, random assays are not an adequate determination of hGH deficiency.
As of 2003, more sensitive monoclonal assays had been developed for measuring hormone levels in the blood serum of women with PCOS, thus allowing earlier and more accurate diagnosis.