COSMIC RADIATION AND CANCER. I. INFLUENCE OF COSMIC RADIATION AT SEA-LEVEL ON INDUCED CANCER

Journal Article · Fri Nov 01 04:00:00 EST 1963 · Sci. Sinica (Peking)

OSTI ID:4150632

Ong, S G

To study the influence of cosmic radiation on cancer induction, 280 mice were injected subcutaneously with 0.5 mg 20-methylcholanthrene in sesame oil and exposed under varying thicknesses of lead shielding to cosmic radiation. Examination for tumors was performed twice a week for 138 days. Results of the analysis of variance showed that the mean latent period for 2 cm of Pb is significantly lower than for no shielding and also for 10 cm of Pb. The mean for 5 cm of Pb was considerably lower than that for 10 cm of Pb. There was no significant difference between the means for 1, 2, and 5 cm of Pb, and no great difference between the mean for no Pb and 10 cm of Pb. An increase in photon- electron showers in 2 cm of Pb corresponded to the lowest latent period observed. Results suggest that there is a significant reduction of the latent period for the induction of tumors due to the photon-electron showers as compared with 0 and 10 cm of Pb. Development of tumors was found not to be sex-dependent. (H.M.G.)

• Research Organization: Inst. of Epidemiology and Microbiology, Academy of Medical Sciences, Peking
• NSA Number: NSA-18-001430
• OSTI ID: 4150632
• Journal Information: Sci. Sinica (Peking), Journal Name: Sci. Sinica (Peking) Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AROMATICS
BIOLOGY AND MEDICINE
CARCINOGENESIS
CHOLANTHRENES
COSMIC RADIATION
ELECTRONS
HYDROCARBONS
LEAD
METHYL RADICALS
OILS
ORGANIC ACIDS
PHOTONS
PLANTS
QUANTITY RATIO
RADIATION EFFECTS
SESAME OIL
SEX
SHIELDING
SKIN
THICKNESS
VARIATIONS