1. Anthracene is one of the smaller polynuclear aromatic hydrocarbons

2. Catalytic production of aryl alkyl hydroperoxides by polynuclear transition metal aggregates

3. Basicity gives a general idea of the amount or degree of polynuclear material in the PAC

4. Paramagnetic polynuclear metal complex having high self-relaxation rate, preparation method thereof, and contrast medium containing same

5. An adsorbent is proposed for phosphate from an aqueous medium, in particular for inorganic or nutrient-bound phosphate from body fluids or nutrients. The adsorbent contains polynuclear beta-iron hydroxide stabilised by carbohydrates and/or humic acid.