While VITAL® uses Action levels informed by doses (RfDs) as the basis for determining the need for PAL, others have proposed to use a concentration (similar to the approach adopted in Japanese legislation) which does not take into account the serving size a person might eat. Specifically,...
The Ediacaran Gaskiers glaciation has been well constrained at ~580 Ma, its correlation with many other glaciogenic diamictite units from around the world remains uncertain. The Fengtai, Luoquan, and Zhengmuguan diamictites occur in southern and western margin of North China block may have been...