• 1,3-Hexachlorobutadiene was assigned a final priority of `high' carcinogenicity concern and placed on the Final Candidate list of chemicals for Committee review on August 6, 1999. (nih.gov)
  • The structures of high valent intermediates (Q in methane monooxygenase and X in ribonucleotide reductase) are debated since Fe-Fe distances of 2.5-3.4â Å were attributed to "open" or "closed" cores with bridging or terminal oxido groups. (bvsalud.org)