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Keywords:

  • carotenoids;
  • photooxidation;
  • photoprotection;
  • quinones;
  • singlet oxygen
Thumbnail image of graphical abstract

The red smear cheeses shown on the cover obtain their color from bacteria such as Brevibacterium linens, which contain highly effective antioxidant and photoprotective phenolic carotenoids such as 3,3′-dihydroxyisorenieratene (DHIR). In their Communication on page 400 ff., H.-D. Martin, W. Stahl, and co-workers describe the synthesis of DHIR and their investigation of its antioxidative and photoprotective properties. Its quinoid oxidation product is blue in color.