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- Petkau_effect abstract "The Petkau effect is an early counterexample to linear-effect assumptions usually made about radiation exposure. It was found by Dr. Abram Petkau at the Atomic Energy of Canada Whiteshell Nuclear Research Establishment, Manitoba and published in Health Physics March 1972. The Petkau effect was coined by Swiss nuclear hazards commentator Ralph Graeub in 1985 in this book Der Petkau-Effekt und unsere strahlende Zukunft (The Petkau effect and our Radiating Future).Petkau had been measuring, in the usual way, the radiation dose that would rupture a simulated artificial cell membrane. He found that 3500 rads delivered in 2¼ hours (26 rad/min = 15.5 Sv/h) would do it. Then, almost by chance, Petkau repeated the experiment with much weaker radiation and found that 0.7 rad delivered in 11½ hours (1 millirad/min = 0.61 mSv/h) also ruptured the membrane. This was counter to the prevailing assumption of a linear relationship between total dose or dose rate and the consequences.The radiation was of ionizing nature, and produced negative oxygen ions (free radicals). Those ions were more damaging to the simulated membrane in lower concentrations than higher (a somewhat counter-intuitive result in itself) because in the latter, they more readily recombine with each other instead of interfering with the membrane. The ion concentration directly correlated with the radiation dose rate and the composition had non-monotonic consequences.".
- Petkau_effect wikiPageID "403035".
- Petkau_effect wikiPageLength "4296".
- Petkau_effect wikiPageOutDegree "13".
- Petkau_effect wikiPageRevisionID "617793918".
- Petkau_effect wikiPageWikiLink Atomic_Energy_of_Canada.
- Petkau_effect wikiPageWikiLink Atomic_Energy_of_Canada_Limited.
- Petkau_effect wikiPageWikiLink Category:Radiobiology.
- Petkau_effect wikiPageWikiLink Cell_membrane.
- Petkau_effect wikiPageWikiLink Concentration.
- Petkau_effect wikiPageWikiLink Ion.
- Petkau_effect wikiPageWikiLink Leukocytes.
- Petkau_effect wikiPageWikiLink Manitoba.
- Petkau_effect wikiPageWikiLink Non-monotonic_logic.
- Petkau_effect wikiPageWikiLink Oxygen.
- Petkau_effect wikiPageWikiLink Rad_(unit).
- Petkau_effect wikiPageWikiLink Radiation.
- Petkau_effect wikiPageWikiLink Superoxide_dismutase.
- Petkau_effect wikiPageWikiLink White_blood_cell.
- Petkau_effect wikiPageWikiLink Whiteshell_Laboratories.
- Petkau_effect wikiPageWikiLink Whiteshell_Nuclear_Research_Establishment.
- Petkau_effect wikiPageWikiLinkText "Petkau effect".
- Petkau_effect hasPhotoCollection Petkau_effect.
- Petkau_effect wikiPageUsesTemplate Template:Radiation.
- Petkau_effect wikiPageUsesTemplate Template:Reflist.
- Petkau_effect subject Category:Radiobiology.
- Petkau_effect hypernym Counterexample.
- Petkau_effect comment "The Petkau effect is an early counterexample to linear-effect assumptions usually made about radiation exposure. It was found by Dr. Abram Petkau at the Atomic Energy of Canada Whiteshell Nuclear Research Establishment, Manitoba and published in Health Physics March 1972.".
- Petkau_effect label "Petkau effect".
- Petkau_effect sameAs ペトカウ効果.
- Petkau_effect sameAs Efekt_Petkau.
- Petkau_effect sameAs m.0242mw.
- Petkau_effect sameAs Эффект_Петко.
- Petkau_effect sameAs Q1981183.
- Petkau_effect sameAs Q1981183.
- Petkau_effect wasDerivedFrom Petkau_effect?oldid=617793918.
- Petkau_effect isPrimaryTopicOf Petkau_effect.