Anmelden

Open Access

  • Startseite
  • Suchen
  • Browsen
  • Veröffentlichen
  • Hilfe
  • Organisationseinheit der BAM

4 Material und Umwelt

  • 4.0 Abteilungsleitung und andere (167) RSS-Feed abonnieren
  • 4.1 Biologische Materialschädigung und Referenzorganismen (331) RSS-Feed abonnieren
  • 4.2 Materialien und Luftschadstoffe (281) RSS-Feed abonnieren
  • 4.3 Schadstofftransfer und Umwelttechnologien (266) RSS-Feed abonnieren
  • 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung (271) RSS-Feed abonnieren
  • 4.5 Kunst- und Kulturgutanalyse (212) RSS-Feed abonnieren

Filtern

Autor

  • Kunte, Hans-Joerg (1) (entfernen)

Erscheinungsjahr

  • 2017 (1) (entfernen)

Referierte Publikation

  • ja (1) (entfernen)

Schlagworte

  • Dosimetry (1) (entfernen)

Organisationseinheit der BAM

  • 4 Material und Umwelt (1)
  • 4.0 Abteilungsleitung und andere (1)
  • 6 Materialschutz und Oberflächentechnik (1)
  • 6.6 Nano-Tribologie und Nanostrukturierung von Oberflächen (1)

1 Treffer

  • 1 bis 1
  • CSV
  • RIS
  • 10
  • 20
  • 50
  • 100
Measurements and simulations of microscopic damage to DNA in water by 30 keV electrons: A general approach applicable to other radiation sources and biological targets (2017)
Hahn, Marc Benjamin ; Meyer, Susann ; Kunte, Hans-Joerg ; Solomun, Tihomir ; Sturm, Heinz
The determination of the microscopic dose-damage relationship for DNA in an aqueous environment is of a fundamental interest for dosimetry and applications in radiation therapy and protection. We combine geant4 particle-scattering simulations in water with calculations concerning the movement of biomolecules to obtain the energy deposit in the biologically relevant nanoscopic volume. We juxtaposition these results to the experimentally determined damage to obtain the dose-damage relationship at a molecular level. This approach is tested for an experimentally challenging system concerning the direct irradiation of plasmid DNA (pUC19) in water with electrons as primary particles. Here a microscopic target model for the plasmid DNA based on the relation of lineal energy and radiation quality is used to calculate the effective target volume. It was found that on average fewer than two ionizations within a 7.5-nm radius around the sugar-phosphate backbone are sufficient to cause a single strand break, with a corresponding median lethal energy deposit being E1/2=6±4 eV. The presented method is applicable for ionizing radiation (e.g., γ rays, x rays, and electrons) and a variety of targets, such as DNA, proteins, or cells.
  • 1 bis 1

OPUS4 Logo

  • Kontakt
  • Impressum
  • Sitelinks