Measurement of 238U and 232Th in Petrol, Gas-oil and Lubricant Samples by Using Nuclear Track Detectors and Resulting Radiation Doses to the Skin of Mechanic Workers

Misdaq, M. A.; Chaouqi, A.; Ouguidi, J.; Touti, Rodouan; Mortassim, A.

doi:10.1097/hp.0000000000000332

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…Equivalent doses (Sv) received by eye tissues of patients wearing contact lenses resulting from the transfer of all residual energies of an alpha-particle of index j and initial energy E αj , emitted by a radionuclide of the 238 U series and an alpha-particle of index j′ and initial energy E αj ′ emitted by a radionuclide of the 232 Th series are respectively expressed by the following relationships (Misdaq et al 2015):…”

Section: Methods Of Studymentioning

confidence: 99%

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

Misdaq,

Elouardi

2023

Health Physics

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To estimate equivalent doses received by eye tissues of patients, contents of uranium (238U), thorium (232Th), radon (222Rn), and thoron (220Rn) were determined inside various optical contact lenses used for vision correction. 238U, 232Th, 222Rn, and 220Rn contents varied between (3.44 ± 0.24) mBq kg−1 and (18.3 ± 1.28) mBq kg−1, (0.57 ± 0.04) mBq kg−1 and (3.53 ± 0.25) mBq kg−1, (3.44 ± 0.24) mBq kg−1 and (18.3 ± 1.28) mBq kg−1, and (0.57 ± 0.04) mBq kg−1 and (3.53 ± 0.25) mBq kg−1, respectively. New external dosimetric models, depending on the cornea eye surface of patients, 238U, 232Th, and 222Rn concentrations inside optical contact lenses, half-life of the emitting radionuclides, and exposure time of patients, have been developed. It has been shown that alpha-particles emitted by the 238U and 232Th series inside the studied optical lenses transfer their energies essentially to the cornea tissues whereas the emitted beta-particles may reach and lose their energies in the crystalline lens of eyes of patients. Alpha-equivalent doses received by eye tissues of patients due to the diffusion of 222Rn and 220Rn gases present in the considered optical lenses were determined. The higher value of the total (alpha plus beta) equivalent dose to the left and right eyes of adult patients wearing optical contact lenses (14 hours per day) has been found equal to 1.32 mSv y−1 cm − 2. It is recommended for patients to reduce the wearing period of optical contact lenses to reduce eye disease risks such as cataract.

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Section: Methods Of Studymentioning

confidence: 99%

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

Misdaq,

Elouardi

2023

Health Physics

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“…The radionuclides of the 238 U, 232 Th, and 235 U series emit alpha and beta-particles as well as gamma rays. It has been shown that alpha radiation doses are deposited in skin of individuals following the immersion in thermal water [1], and application of olive oil [2], medical drugs [3] and petrol *Corresponding author's E-mail ID: misdaq@uca.ac.ma [4]. It also has been shown that alpha doses are deposited in the eye tissues of individuals from the plate out of radon and thoron progeny present in ambient air in dwellings and workplaces [5].…”

Section: Introductionmentioning

confidence: 99%

238U and 232Th Contents in Essential Plant Oils: Alpha and Beta Radiation Doses to the Skin of Bathers in Spa Rooms

Misdaq¹,

Benelfakir²

2020

International Journal of Engineering Research and Technology

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Essential plant oils are widely used by bathers in spa rooms for body firming, anti-aging, and anti-wrinkle and skin firming. To explore the exposure pathway of 238 U, 232 Th and their progenies to the skin of bathers in spa rooms, these radionuclides were measured in various essential oils extracted from different plants by using CR-39 and LR-115 II solid state nuclear track detectors (SSNTDs). Annual equivalent doses to skin due to alpha-and beta-particles emitted by the radionuclides of the 238 U and 232 Th series from the application of different plant oil samples by adult male bathers in spa rooms were evaluated. The influence of the essential plant oil nature and exposure time of bathers in spa rooms was investigated. The maximum total equivalent dose to the skin of bathers in spa rooms, due to the application of L'olivier plant oil during 4 hours per week, was found equal to 0.6 mSv y-1 cm-2 .

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“…The annual effective doses initiated of 238 U, 232 Th were evaluated in different foods using the International Commission on Radiological Protection (ICRP) using the dose coefficients by ingestion [4], in the different samples olive oil [5] and in oil and lubricant oil [6]. In this work, we use a method based on the use of nuclear solid trace detectors (SSNDs) to measure the concentrations of 238 U, 232 Th and 222 Rn in the various table oil samples in order to evaluate radiation doses received by consumers following ingestion of these table oils.…”

Section: Introductionmentioning

confidence: 99%

Measurement of²³⁸U,²³²Th and²²²Rn concentrations in different table oils samples. Determination of committed effective doses received by consumers following the ingestion of table oil.

Touti

2019

Polish Journal of Medical Physics and Engineering

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The main objective of our work is to measure 238U, 232Th, 222Rn and 220Rn in different table oil samples using a method based on the use of two types of solid nuclear track detectors: CR- 39 and LR-115 II in order to determine the doses of radiation received by the individuals following ingestion of the samples of table oil studied. Indeed, we have developed an original method based on the determination of the detection efficiencies of CR-39 and LR-115 II solid nuclear track detectors for alpha particles emitted from the uranium 238 and thorium 232 series to evaluate 238U, 232Th, 222Rn and 220Rn concentrations in different table oil samples. We were able to determine doses of radiation due to 238U, 232Th and 222Rn received by individuals of the Moroccan, French, Italy, Spain and Tunisia populations following the ingestion of table oil. The effective doses committed due to 238U, 232Th, and 222Rn following the ingestion of the table oil by the consumers were determined. The maximum total committed effective dose was found equal to (10±0.7) µSv·y−1 of the Moroccan population, (11.6±0.7) µSv·y−1 of the French population, (10.3±0.7) µSv.y−1 of the Italian population, (10.4±0.5) µSv·y−1 of the Spanish population and (10.5±0.7) µSv·y−1 of the Tunisian population is much lower than the average dose given by the United Nations Scientific Committee on the Effects of Atomic Radiation [1] for ingestion (0.2 to 0.8 mSv·y−1). The results obtained using our method are in very good agreement with those obtained using the model of the International Commission on Radiological Protection

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Measurement of 238U and 232Th in Petrol, Gas-oil and Lubricant Samples by Using Nuclear Track Detectors and Resulting Radiation Doses to the Skin of Mechanic Workers

Cited by 7 publications

References 11 publications

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

238U and 232Th Contents in Essential Plant Oils: Alpha and Beta Radiation Doses to the Skin of Bathers in Spa Rooms

Measurement of²³⁸U,²³²Th and²²²Rn concentrations in different table oils samples. Determination of committed effective doses received by consumers following the ingestion of table oil.

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Measurement of 238U and 232Th in Petrol, Gas-oil and Lubricant Samples by Using Nuclear Track Detectors and Resulting Radiation Doses to the Skin of Mechanic Workers

Cited by 7 publications

References 11 publications

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

Measurement of 238U, 232Th, 222Rn and 220Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients

238U and 232Th Contents in Essential Plant Oils: Alpha and Beta Radiation Doses to the Skin of Bathers in Spa Rooms

Measurement of238U,232Th and222Rn concentrations in different table oils samples. Determination of committed effective doses received by consumers following the ingestion of table oil.

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Measurement of²³⁸U,²³²Th and²²²Rn concentrations in different table oils samples. Determination of committed effective doses received by consumers following the ingestion of table oil.