Radiobiological long-term accumulation of environmental alpha radioactivity in extracted human teeth and animal bones in Malaysia.
In this study, the radiobiological analysis of natural alpha emitters in extracted human teeth and animal bones from Malaysia was estimated. The microdistributions of alpha particles in tooth and bone samples were measured using CR-39 alpha-particle track detectors. The lowest and highest alpha emission rates in teeth in the Kedah and Perak states were 0.0080 ± 0.0005 mBq cm(-2) and 0.061 ± 0.008 mBq cm(-2), whereas those of bones in the Perlis and Kedah states were 0.0140 ± 0.0001 mBq cm(-2) and 0.7700 ± 0.0282 mBq cm(-2), respectively. The average alpha emission rate in male teeth was 0.0209 ± 0.0008 mBq cm(-2), whereas that of female teeth was 0.0199 ± 0.0010 mBq cm(-2). The alpha emission rate in teeth is higher in smokers (0.0228 ± 0.0008 mBq cm(-2)) than in non-smokers (0.0179 ± 0.0008 mBq cm(-2)). Such difference was found statistically significant (p < 0.01).
School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia; Department of Environment, College of Science, University of Kufa, Iraq. Electronic address: basimnajaf@yahoo.com.
B A
BA
Almayahi
School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
A A
AA
Tajuddin
School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
M S
MS
Jaafar
D000293:Adolescent; D000328:Adult; D000368:Aged; D000512:Alpha Particles; D000818:Animals; D001842:Bone and Bones / Q000737:chemistry*; D002417:Cattle; D002645:Chickens; D005260:Female; D005399:Fishes; D006801:Humans; D008296:Malaysia; D008297:Male; D051379:Mice; D008875:Middle Aged; D011834:Radiation Monitoring; D011851:Radioactivity; D012907:Smoking; D014070:Tooth / Q000737:chemistry*; D055815:Young Adult
Bones; CR-39 detector; Natural alpha radioactivity; Smokers; Teeth