Disclosed are polypropylene homopolymers, copolymers and mono and polyfunctional polypropylene derivatives as well as methods of preparing them. These polymers are prepared in the eresence of a metallocene catalyst and are isotactic. Applications using these polymers include but are not limited to, electrophotography toners, melt facture reduction agents, and compatibilizers.

 
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> Method of quenching electronic excitation of chromophore-containing organic molecules in photoactive compositions

> Compositions comprising hypsizygus ulmarius extract

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