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Effects of very low doses of ionizing radiation were investigated on life-span in Paramecium tetraurelia. After autogamy single cell cultures were place (1) in a control chamber with radiopermeable walls; (2) in a shielded device with 10 cm thick lead walls; (3) in a similar shielding device including a 60Co source giving a dose of 760 mrad per year at the culture level. Life-spans, expressed in days and in mean total number of fissions measured from autogamy to the death of all sublines, were about 200 fissions and 55 days in controls. Life-spans of shielded sublines were increased and lower life-spans were observed in both shielded and irradiated sublines. These findings provide new evidence for a biological effect of very low doses of ionizing radiations and show that fission potential of Paramecium tetraurelia can be affected by variations in the background radiation level.
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
December 1989,
Genetics,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
January 1988,
Experimental gerontology,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
January 1992,
Mutation research,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
September 2004,
Mechanisms of ageing and development,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
June 1967,
Comptes rendus hebdomadaires des seances de l'Academie des sciences. Serie D: Sciences naturelles,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
January 1972,
Physics in medicine and biology,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
August 1983,
Journal of the Tennessee Medical Association,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
January 1984,
Indian journal of cancer,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
January 1982,
Revue d'epidemiologie et de sante publique,
R Tixador, and
G Richoilley, and
E Monrozies, and
H Planel, and
G Tap
October 2007,
Morphologie : bulletin de l'Association des anatomistes,
