an appraisal of the state of affairs
appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard
a mark on an article of trade to indicate its origin and authenticity
a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.
make an effort or attempt
