• Soot
  • Sandia National Laboratories scientists Scott Skeen, left, Nils Hansen, center, and Brian Adamson discuss tandem mass spectrometry, which was used for the detection of aliphatically linked polycyclic aromatic hydrocarbons found in soot producing flames. (phys.org)
  • The team used an analytical technique called tandem mass spectrometry-using an instrument provided by Lawrence Berkeley Lab and customized by Adamson-to detect gas-phase polycyclic aromatic hydrocarbons with aliphatic side chains in flames that produce soot, something never done before. (phys.org)
  • Recent work by Sandia scientist Hope Michelsen, technologist Paul Schrader and former postdoctoral researcher Olof Johansson broke ground by identifying chemical chain-reaction processes where hydrocarbons could form soot. (phys.org)
  • One area of debate is whether the chemical byproducts in soot are polycyclic aromatic hydrocarbons, made solely out of ring-shaped groups of atoms, or contain extra, non-cyclic structures called alkyl, or aliphatic, groups. (phys.org)
  • benzene
  • According to Clar's rule , the resonance structure of a PAH that has the largest number of disjoint aromatic pi sextets -i.e. benzene -like moieties-is the most important for the characterization of the properties of that PAH. (wikipedia.org)
  • high
  • The EU-RL for polycyclic aromatic hydrocarbons in Feed and Food as laid down in Regulation (EC) No 882/2004 and Directive 96/23/EC contributes to the implementation of high quality implementation and uniform results. (wur.nl)