Når konsentrasjon av rusmidler i blod skal omregnes til promille brukes enheten mikromol per liter blod. Grensen for cannabis er satt på 0,004 mikromol THC per liter blod. Dette betyr at du er in excess of grensen i opptil twelve timer etter et enkeltinntak som tilsvarer twenty five mg THC, eller enda lenger om du har brukt mer enn dette.Toppsjef

In contemporary periods gemstones are recognized by gemologists, who describe gems as well as their qualities using complex terminology particular to the sphere of gemology.Some gemstones are harder to synthesize than Other people and not all stones are commercially viable to try to synthesize. They are the most common in the marketplace currently.