The sampling frame for this study was the Twins Early Development Study (TEDS), a large-scale longitudinal study of behavioural development in a representative sample of twins born in 1994, 1995 and ...
The author examines sample-preparations methods used in inductively coupled plasma–optimal emission spectroscopy for four test metals. When analyzing for trace metals using inductively coupled plasma ...
Introduction -- Density : mean and variance -- Normal and sampling distributions for fieldwork -- Confidence limits and intervals for density -- How many field samples? -- Spatial distribution : the ...
A common thread wove through the diverse scientific presentations and new product launches at the recent American Society for Mass Spectrometry (ASMS) annual conference in Salt Lake City. Researchers ...
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