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Cancer Risk Assessment Due to Natural and Fallout Activity in Some Cities of Pakistan
Ahad A.,Matiullah Matiullah,Bhatti Ijaz A.,Orfi S.D. The Korean Association for Radiation Protection 2006 방사선방어학회지 Vol.31 No.1
The measured mean activities of $^{226}Ra,\;^{232}Th,\;^{40}K\;and\;^{137}Cs$ in the soil of Bahawalpur, Bahawalnagar and Rahimyar Khan Bistricts were 32.9, 53.6, 647.4 and 1.8 Bq $kg^{-1}$. The average absorbed dose rate calculated from these activities was 74.3 nGy $h^{-1}$ and the mean annual effective dose rate was found to be 0.46 mSv $y^{-1}$. Absorbed doses to different body organs were derived from annual effective doses using tissue weighting factors. Radiation induced fatal cancer risks were assessed by using ICRP 60 Model. Estimations incurred 184deaths per year due to cancer.
Properties of PSL, TL, and ESR to Identify the Irradiated Sesame Seeds after Steaming
Jeongeun Lee,Tusneem Kausar,Hyung-Wook Chung,Il-Yun Jeong,Ijaz A. Bhatti,Joong-Ho Kwon 한국식품과학회 2009 Food Science and Biotechnology Vol.18 No.2
Three physical methods, photostimulated luminescence (PSL), thermoluminescence (TL), and electron spin resonance (ESR), have been applied to detect the irradiation treatment for the non- and steamed sesame seed samples. PSL successfully screened the irradiated samples from the non-irradiated control by comparing their photon counts (PCs) with the lower (less than 700 count/60 sec) and upper threshold values (higher than 5,000 count/60 sec). TL signals were still detected in all irradiated samples even after steaming, which was reconfirmed with TL ratios [integrated area of TL₁ (the first glow)/TL₂ (the second glow)] through re-irradiation step. ESR spectrometry showed that radiation-induced cellulose radicals were detected in all the irradiated samples irrespective of steaming treatment. Identification of the irradiated sesame seeds was possible even after steaming by analyzing PSL, TL, and ESR.