scholarly journals Measurement of radon (222Rn) and thoron (220Rn) concentration of plants (Vegetables) in different locations in Sulaimania City using CR-39 detector

2018 ◽  
Vol 6 (2) ◽  
pp. 1-10
Author(s):  
Najeba F. Salih ◽  
Hemn M. Salh ◽  
Ari M. Hamad
Keyword(s):  
Radon Concentration ◽  
Radioactive Decay ◽  
Track Detector ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
Radiation Level ◽  
Standard Level ◽  
Local Geology ◽  
Average Effective Dose ◽  
Radial Dose

Introduction: Radon is a radioactive gas released from the normaldecay of uranium in rocks and soil depending on local geology. Radioactive decay of uranium through radium produces radon. Materials and Methods: In the present work, seventeen plant (vegetables) samples collected from Sulaimania Governorate. The plants have been analyzed and examined to measure the level of radon (222Rn) and thoron (220Rn) using plastic track detector (CR-39) for evaluation of radon and thoron concentration in this region. Results and Discussion: The results indicated that the higher andlower radon concentration have been found in Halabjay-con, and inSulaimani-center, to be (119.72 Bq.m-3, 3.236 pCi/L), (54.36 Bq.m-3,1.469 pCi/L), respectively, and the higher and lower thoron concentration have been found in Qaladza and in Sulaimani-center, to be (733.66 Bq.m-3, 19.828 pCi/L), (227.33 Bq.m-3, 9.117 pCi/L), respectively. Radiation level compared with the standard level known by the EPA (4 pCi/L) and190 Bqm-3. The concentration of radon in all sample plants is less than international standard level 4(pCi/L)and190 (Bqm-3), therefore the human in safety. The average effective dose equivalent (EDE) of radon from plants determined was (7.2) μSv.y-1 for all the samples. This is lower than the normal value of (1.3) mSv.y-1 given by EPA. Conclusions: This study showed that the contamination in the plant (vegetables) is normal and is not considered a great radial dose for plants and consequently for humans.

Determination Radon Concentration (Radon Gas) in Urine of Patients with Cancer

2021 ◽  
Vol 19 (4) ◽  
pp. 87-91
Author(s):  
Mohammed M. Asker ◽  
Esam S. Ali ◽  
Sarwa A. Mohammed
Keyword(s):  
Radon Concentration ◽  
Radioactive Isotope ◽  
Radioactive Decay ◽  
Track Detector ◽  
Alpha Particles ◽  
Radioactive Nuclide ◽  
Alpha Radiation ◽  
Patients With Cancer ◽  
Radon Gas ◽  
Irradiation Process

The present study aims at studying the measurement radon concentration (Radon gas) in the urine of patients with cancer, that made up of (23) different samples of patients’ urine. These samples have collected from Kirkuk Oncology & Hematology Center. Chemical etching process for CR-39 track detector has used to record the traces of Alpha particles “alpha rays” or “alpha radiation” that comes from Radon included in the models. The Plastic Tubing – Tubes that contain some models in reagent irradiation process, which shaped as U letter, have been used. The results illustrated that the highest concentration of Radon is (8.9) Bq.m-1 in R14 model, as well as the lowest concentration of Radon is (1.5) Bq.m-1 in R4 model. The Radon levels that have been measured are within the natural limits of radioactive decay caused by radioactive nuclide or “radioactive isotope” in urine of patients with cancer; these are not a risk in humanity.

Radiation Doses 51Cr-Bleomycin

1987 ◽  
Vol 26 (02) ◽  
pp. 97-104
Author(s):  
J. Liniecki ◽  
J. Greger ◽  
D. Brykalski ◽  
Alina Zadrozna ◽  
J. Bialobrzeski
Keyword(s):  
Plasma Concentration ◽  
Urinary Excretion ◽  
Effective Dose ◽  
Radioactive Decay ◽  
Liver Cells ◽  
Whole Body ◽  
Effective Dose Equivalent ◽  
Cell Nuclei ◽  
Dose Equivalent ◽  
Body Retention

Extensive studies were made of long-term whole-body retention, plasma concentration, urinary excretion and organ retention of 51Cr in rats after intravenous injection of 51Cr-bleomycin. A similar but less extensive investigation was performed on rabbits, and whole-body retention, plasma concentration and urinary excretion was also followed in patients given 51Cr-bleomycin for diagnostic purposes. From an analysis of the collected information it followed that integrated whole-body and organ retention, corrected for radioactive decay, is similar in man and rabbit, and higher by a factor of about 2 in the rat. Doses to organs and whole body in man were calculated using the MIRD methodology and assuming conservatively that the kinetic data derived in rats are applicable to man. The organ and whole-body MIRD doses after 51Cr-bleomycin administration are comparable to those after 67Ga-citrate and the effective dose equivalent from a diagnostic amount of 740 MBq of the 51Cr complex amounts to about 6 mSv. However, the subcellular distribution in the liver of 51Cr, administered in the form of 51Cr-bleomycin, indicated a significant enrichment of 51Cr in the nuclei and in the DNA over mean concentrations in the liver cells. Also, the quality factor for Auger electrons, emitted by 51Cr, when assessed on the basis of the Q vs. LET relationship, as proposed by ICRP, was substantially higher than unity. Doses calculated for cell nuclei and the DNA in the liver cells were higher than the cell-averaged values by a factor 2.5 and 5, respectively, and the corresponding dose equivalents by a factor of 9 and 24. The effective dose equivalent, estimated on the basis of dose equivalents to cell nuclei and the DNA, amounted to 33 and 83 mSv per examination (740 MBq of 51Cr-bleomycin), respectively.

Measurement of the radon exhalation rate and effective radium concentration in soil samples of southern Sakarya, Turkey

2016 ◽  
Vol 27 (2) ◽  
pp. 278-288 ◽  
Author(s):  
Emre Tabar ◽  
Hakan Yakut ◽  
Adem Kuş
Keyword(s):  
Radon Concentration ◽  
Indoor Radon ◽  
Soil Samples ◽  
Effective Dose Equivalent ◽  
Exhalation Rate ◽  
Dose Equivalent ◽  
Indoor Radon Concentration ◽  
Radon Exhalation ◽  
Average Value ◽  
Radon Exhalation Rates

In the present study, radon exhalation rates in terms of mass and area, as well as the effective radium concentration in soil samples collected simultaneously from different districts of southern Sakarya have been measured by Sealed Can technique using LR-115 type-II detectors. Mass and areal radon exhalation rates in soil samples vary from 35.76 ± 1.5 to 253.15 ± 3.8 mBqkg−1h−1 with an average value of 112.53 ± 2.7 mBqkg−1h−1 and 0.73 ± 0.2 to 5.18 ± 0.6 Bqm−2h−1 with an average value of 2.30 ± 0.6 Bqm−2h−1, respectively. The effective radium content was found to vary in the range 3.77 ± 0.5 to 26.69 ± 1.3 Bqkg−1 with an average value of 11.86 ± 0.9 Bqkg−1. The area exhalation rate was also used to calculate indoor radon concentration contributed by radon exhalation from soil, and to estimate annual effective dose equivalent. While the indoor radon concentration contributed by radon exhalation from soil varies from 2.93 ± 0.9 to 20.73 ± 2.3 Bqm−3 with an average value of 9.22 ± 1.5 Bqm−3, the estimated effective dose equivalent varies from 0.09 to 0.61 mSvy−1 with an average value of 0.27 mSvy−1.

The Measurements of Natural Radioactivity, (Radon and Gamma concentrations), around the old fertilizer factory in Basrah/Iraq

2015 ◽  
Vol 7 (1) ◽  
pp. 1324-1335
Author(s):  
Jabbar H. Jebur
Keyword(s):  
Effective Dose ◽  
Radon Concentration ◽  
Gamma Ray ◽  
Annual Effective Dose ◽  
Track Detector ◽  
Exhalation Rate ◽  
Hazard Indices ◽  
Radium Equivalent ◽  
Passive Technique ◽  
Radium Activity

Radon concentration, exhalation rate, annual effective dose, radium activity, thorium, uranium potassium and radium equivalent have been measured in the present investigation for soil in the area around the old fertilizer factory in southern of Basrah Governorate. The measurements based on CR39 track detector for passive method, RAD7 for active method and NaI(Tl) for gamma concentration measurements. Average values for radon concentration in soil were 112.04±10.76 Bq/m3 using passive technique and 104.56±6.05 Bq/m3 using RAD7. From the result of the passive technique, area and mass exhalation rates and the annual effective dose were calculated. Gamma ray spectroscopy for the soil samples were performed and found that the average concentrations of 226Ra, 232Th and 40K were 50.89 Bq/kg, 21.74 Bq/kg and 640.4 Bq/kg respectively. Gamma ray hazard indices were calculated and found they are within the world average.

Calculation of the individual effective dose equivalent in Italy following the chernobyl accident

1991 ◽  
Vol 13 (2) ◽  
pp. 141-156
Author(s):  
M. Lotfi ◽  
S. Mancioppi ◽  
S. Piermattei ◽  
L. Tommasino ◽  
D. Azimi-Garakani
Keyword(s):  
Effective Dose ◽  
Chernobyl Accident ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
The Individual
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