Later Friday, the ministry said tests showed that up to 2, 100 nanograms of dioxin per kilogram ( 2 . 2 lbs ) was in samples of zinc dust taken just outside the company compound, and dust inside the compound tested 7, 400 nanograms, more than double that originally reported.
22.
There are several industries in H�yanger including the H�yanger metal plant ( owned by Norsk Hydro ), Norsk Aluminium had a plant there, Aker Kv�rner runs the maintenance for Norsk Hydro's plant, Bilfelgfabrikken Fundamus builds wheels for Audi cars, and Nyrstar which recycles zinc dust from the steel industry nearby.
23.
Other older methods for the organic synthesis of acridines include condensing diphenylamine with chloroform in the presence of aluminium chloride, by passing the vapours of orthoaminodiphenylmethane over heated litharge, by heating salicylaldehyde with aniline and zinc chloride or by distilling acridone ( 9-position a carbonyl group ) over zinc dust.
