Готові списки джерел за темами / Radium Equivalent Activity

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Добірка наукової літератури з теми "Radium Equivalent Activity"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Radium Equivalent Activity"

Tufail, Muhammad. "Radium equivalent activity in the light of UNSCEAR report." Environmental Monitoring and Assessment 184, no. 9 (2011): 5663–67. http://dx.doi.org/10.1007/s10661-011-2370-6.

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Özden, Seli̇n, and Serpi̇l Aközcan Pehli̇vanoğlu. "Natural and Artificial Radioactivity Concentrations and Health Risks due to Radionuclides in the Soil of Nevşehir (Cappadocia)." International Journal on Applied Physics and Engineering 2 (October 17, 2023): 144–51. http://dx.doi.org/10.37394/232030.2023.2.14.

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Natural and artificial radionuclides in the surface soil samples collected from the Nevşehir (Cappadocia) region were analyzed using gamma spectrometry employing an HPGe detector. Activity concentrations of 226Ra, 232Th, and 40K range from 58.31 to 77.40 Bq kg−1, 60.56 to 90.97 Bq kg-1, and 796.42 to 1142.8 Bq kg-1, respectively. The values indicate that the activity concentrations of the natural radionuclides in the soil samples were higher than the world average. Since Turkey is a country greatly affected by the Chernobyl accident, 137Cs activity concentration was measured to determine wheth

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Lu, Jian, Hao Yang, and Ming Li Zhang. "The Radioactivity Levels and Safety Assessment of Building Materials in Nanjing, Jiangsu Province, China." Advanced Materials Research 243-249 (May 2011): 6913–18. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.6913.

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In order to invetigate the natural radioactivity levels of typical building materials in Nanjing, Jiangsu Province,China, the specific activities of natural radionuclides (226Ra,232Th and40K) in samples of building materials were measured by ORTEC HPGe gamma ray spectrometer. And the radium equivalent activity, the internal and external exposure index, and relative annual effective dose equivalents were also claculated. The average concentrations of all the samples ranged from 64 to 318.79 Bq·kg-1, 11.35 to 144.83 Bq·kg-1and 92.57 to 951.68 Bq·kg-1for226Ra,232Th and40K, respectively. Their ave

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Phansuke, Piya, Sunaree Boodeepong, and Mubarak Lakkiang. "Estimation of Radionuclide (226Ra, 232Th and 40K) in Soil Granite Rock Mountains Phangan District, Surat Thani Province." ASEAN Journal of Scientific and Technological Reports 24, no. 1 (2021): 14–22. http://dx.doi.org/10.55164/ajstr.v24i1.241182.

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The objective of this study were to analyze the specific activity of the natural radioactive nuclide of 226Ra, 232Th and 40K and to calculate the Radium equivalent activity (Raeq), the Internal hazard index (Hin), the External hazard index (Hex), the Gamma-absorbed dose rate (D) and the Annual external effective dose rate (E) in the 20 soil samples from Koh Phangan District, Surat Thani Province by using gamma-ray spectrometer with a high purity germanium detector (HPGe). The results show that the specific activity of radioactive nuclides in many samples were higher than Thailand and the globa

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Jameel, Athraa Naji. "Radiological Risk Assessment and Radioactivity Concentration in ediment of Tigris River of the Medical City/Bab Al Muadham." Ibn AL- Haitham Journal For Pure and Applied Sciences 35, no. 1 (2022): 28–38. http://dx.doi.org/10.30526/35.1.2796.

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The concentrations of natural radionuclides in sediment samples from various locations along the stream of the Tigris riverbank in the Medical city in Bab Al- Muadham, Baghdad, had been examined using NaI(Tl) detector. The mean concentrations of specific activity for 238U, 232Th, 40K and 137Cs for sediments of the river was 13.5±4.6, 35.2±3.1, 272.2±21.4 and 1.5±0.35 Bq/kg respectively. The findings revealed that the concentration values of natural radionuclides and cesium were below permitted limits. The radiological hazard was compared with a global average (Radium equivalent, absorbed dose

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Mary, Karolin, and Shanthi George. "Investigation of natural radioactivity and its associated radiological parameters in different tiles used in Kanyakumari district, Tamil Nadu, India." Radiation Protection and Environment 47, no. 2 (2024): 97–101. http://dx.doi.org/10.4103/rpe.rpe_10_24.

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Abstract Radiological parameters resulting from different tiles commonly used in homes and offices in Kanyakumari district of Tamil Nadu, India were assessed in this study by carrying out radioactivity measurement of natural radionuclides (226Ra, 232Th, and 40K) in them using a NaI (Tl) gamma-ray spectrometer. The tiles’ respective mean activity concentrations were about 49.2 Bqkg−1 for 226Ra, 49.3 Bqkg−1 for 232Th, and 479 Bqkg−1 for 40K. Radiological parameters such as radium equivalent activity, absorbed dose rate, annual effective dose, and gamma index were evaluated. The calculated mean a

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Bawalia, Nitin K., Dalpat Meena, Shailendra K. Gupta, et al. "Estimation of natural radioactivity in the soil samples around the uranium site, royal village, Khandela, Sikar district, Rajasthan." Radiation Protection Dosimetry 199, no. 20 (2023): 2412–18. http://dx.doi.org/10.1093/rpd/ncad265.

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Abstract The measurements of activity concentration of radium ( 226Ra ), thorium ( 232Th) and potassium ( 40K ) natural radionuclides using high purity germanium ( HPGe ) detector to assess harmful effects on people residing around Royal Uranium Site, Sikar, Rajasthan, India. The activity concentrations range from 29.03 ± 3.72 to 69.95 ± 4.07 Bq/kg for 226Ra with a mean value of 47.01 Bq/kg, 57.99 ± 6.13 to 113.94 ± 6.54 Bq/kg with a mean value of 86.56 Bq/kg for 232Th,678.19 ± 76.36 to 1426.55 ± 81.32 Bq/kg for 40K with a mean value of 1195 Bq/kg. Average Radium Equivalent Activity was measur

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Pillai, Rani K., and P. Rejani. "Radioactivity analysis of commonly available building and flooring material in Kerala, India." Ecology, Environment and Conservation 29 (2023): 446–51. http://dx.doi.org/10.53550/eec.2023.v29i01s.069.

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Building materials are primary sources of indoor gamma radiation. Therefore, we have made a detailed study of building materials which are being used extensively in the region. Primordial radionuclides namely uranium (238U), Thorium (232Th) and potassium (40K) were studied in the building materials. As of the results acquired, we can arrive at the following inferences: We have estimated specific activities of radionuclides, the radium equivalent and radiological risk parameters resulting from the gamma originating from building materials. The highest Radium equivalent activity was obtained for

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Elmzainy, Ahmed S. A., Salah Saleh Basil, Salha D. Y. Alsaadi, and Areej Hazawi. "Measurement of natural radioactivity in the sediments of the beaches of the north east coast of Libya." مجلة العلوم الاساسية و التطبيقية, no. 14 (August 10, 2022): 38–44. https://doi.org/10.36602/jsba.2022.14.38.

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In this study, we measured radiological hazards associated with beach sediments in the coastal area near the city of Al-Bayda, Libya. Radiation risk was assessed by estimating radium equivalent activity (Req), absorbed dose rate (DR), and annual effective dose rate (AEDR). As well as the external health risks(Hex) of the sediment samples collected. We Studies of naturally emitted gamma rays from the three radionuclides 226Ra, 232Th and 40 K. It was found that the average values of radioactivity were 8.26 Bq/Kg, 5.95 Bq/Kg and 66.1 Bq/Kg, respectively. Gamma ray measurement was performed using

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Odongo, Willis Otieno Gor, Margaret Chege, Nadir Hashim, Shinji Tokonami, Kranrod Chutima, and Charles Rotich. "Determination of Activity Concentration of Natural Radionuclides and Radiation Hazards’ Assessment of Building Materials in High Background Radiation Areas of Homa and Ruri, Kenya." Scientific World Journal 2021 (December 14, 2021): 1–7. http://dx.doi.org/10.1155/2021/9978619.

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The areas around Homa and Ruri hills in Homa Bay County in Kenya are associated with high background radiation levels. The activity concentration of the natural radionuclides (226Ra, 232Th, and 40K) in earthen building materials used in the areas of Homa and Ruri hills has been measured using a NaI (Tl) detector in this work. The measured values of radioactivity concentrations are used to estimate the associated radiological risk. The earthen building material samples from Ruri registered relatively high 232Th concentration values averaging 1094 ± 55 Bq/kg, nearly three times those of the samp

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Більше джерел

Частини книг з теми "Radium Equivalent Activity"

Ozmen, Suleyman, and Bulent Topcuoglu. "Determination of natural radioactivity levels of sludges collected from wastewater treatment plants of Antalya/Türkiye." In Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”. Firenze University Press, 2022. http://dx.doi.org/10.36253/979-12-215-0030-1.50.

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226Ra (10.8), 232Th (13.4) and 40K (135.7) and 137Cs (3.2) concentration levels (Bq kg-1) of the wastewater treatment plant sludges in Antalya were assessed and were found to be consistent with the literature. The absorbed gamma dose rate (D: 3.1-17.5 nGyh-1), radium equivalent activity (Raeq: 6.4-37.7 Bq kg-1), annual equivalent dose (AED: 3.8–21.4 µSv h-1), internal (Hin<1.0) and external (Hex<1.0) hazard indices were in the permissible limits published by IAEA. It was observed that the use of wastewater treatment sludge in agricultural areas would not create any risk in radiological t

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Bernal, Juan. "Deiodinases in the Brain." In Thyroid and Brain: Understanding the Actions of Thyroid Hormones in Brain Development and Function. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815274226124010007.

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Deiodinases (DIO) are central to regulating thyroid hormone action in the brain because they control the tissue concentration of the active hormone triiodothyronine (T3). DIO2, the outer ring, 5’-deiodinase expressed in the brain, converts T4 to T3 and is active primarily in two glial cell types: astrocytes and tanycytes. Astrocytes produce all of brain T3 during the fetal period and a significant fraction in adults. T3 from astrocytes reaches other neural cells, mainly neurons, devoid of DIO2. The T3 produced in the tanycytes travels to hypothalamic nuclei to perform neuroendocrine functions.

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"Defined solid-angle alpha spectrometry: Geometrical sensitivities in absolute Rn-222 activity measurements." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.43.2.

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Radon (Rn-222) is a naturally occurring radioactive gas in the uranium-238 (U-238) decay chain and is a major contributor to natural radiation exposure. Its alpha-emitting progeny attach to airborne particles, posing serious health risks, especially lung cancer. To mitigate these risks, the European Council Directive 2013/59/EURATOM (EU-BSS) mandates monitoring and mitigation actions for indoor radon concentrations exceeding 300 Bq/m³. Meeting these regulatory requirements presents considerable metrological challenges, especially due to the high uncertainty of low-level radon measurements and

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Maconie, Robin. "Space." In The Concept of Music. Oxford University PressOxford, 1990. http://dx.doi.org/10.1093/oso/9780198162155.003.0009.

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Abstract To oral cultures space and time are equivalent. A journey is measured in hours or days as readily as inyards or miles. The global village of today calculates distances in time zones. The acoustic element linking perceptions of time and space, literally and figuratively, is the bell. Bells in steeples used to give the signals which called village communities to work, rest, and prayer. When the clock took up residence in the church steeple like a mechanical cuckoo in the nest, the bells of time lost their earlier direct relationship with the natural cycles of rural activity. Time-keepin

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"Radiation protection calculations in the design of the AB- BNCT facility for the PNC-PNRR-ANTHEM Project." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.37.12.

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In the framework of the PNC-PNRR ANTHEM project, a new Accelerator-Based Boron Neutron Capture Therapy (AB-BNCT) research and clinical facility will be built in Caserta, Italy. The ANTHEM clinical facility neutron production will be based on a Radio Frequency Quadrupole proton accelerator coupled with a beryllium target. Both the accelerator and the target are designed and manufactured by the Italian National Institute of Nuclear Physics (INFN). This machine delivers 5 MeV protons with a 30 mA current in continuous wave, producing at the target a neutron flux of the order of 1014 neutrons per

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Тези доповідей конференцій з теми "Radium Equivalent Activity"

Lasker, S. E., B. Y. Lee, and R. E. Madden. "LOW MOLECULAR WEIGHT HEPARINS s ORAL ABSORPTION IN MONKEYS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644855.

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An orally administered low molecular weight heparin-like derivative of the commercial polydisperse polysaccharide is desirable clinically. The dissociation of antithrombotic properties and the induction of bleeding as well as minimal effect on platelet function are characteristics of some low-molecular weight heparins; however the circulating level of the anti Xa activity associated with demonstrable theraputic efficacy is not yet defined.The availability of a variety of low molecular weight heparins provided us with the opportunity to evaluate the gastrointestinal absorption characteristics o

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Girlea, Olesea. "Evil Representations of Water." In Conferinta stiintifica nationala "Lecturi în memoriam acad. Silviu Berejan", Ediția 6. “Bogdan Petriceicu-Hasdeu” Institute of Romanian Philology, Republic of Moldova, 2023. http://dx.doi.org/10.52505/lecturi.2023.06.21.

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Water represented as a natural element contains two meanings of good and evil. From the perspective of representing water as the abode of evil, this is interpreted as a veritable descent into hell, as a psychological representation, immersion in water is in some cases the equivalent of probing the unconscious. We propose to elucidate the negative valences of water and its imaginary representations starting from Mircea Eliade’s work „Isabel and the waters of the devil”, Radu Găvan „Fragile devils”, Alexandru Popescu „Colorless depths” and the concept of „Ophelia’s complex” from the work of Gast

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Fu, Pengtao, and Zhijun Li. "A Method to Evaluate Defect Size of Failed Fuel Rods in CGN 1000MWe PWRs." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-92788.

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Abstract Fuel cladding is the first barrier to confine the release of fission products to the environment during normal operation. Once the fuel rods defect, the fission product accumulated in the pellet-cladding gap of failed fuel rods will release into the primary loop and lead to high activity levels in a pressurized water reactor. It is necessary to determine the status of fuel failure to avoid its degradation in the operation. This paper introduces the mechanism of the generation and release of fission products in fuel rods and the primary loops in a pressurized water reactor, and provide

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Chizzola, Remigius, Harinder Makkar, Ellen McGrath, and Papu Haroon. "EXTRACTION OF ANTIOXIDANTS FROM MORINGA OLEIFERA LEAVES, STABILITY OF THE RESULTING ANTIOXIDANTS, AND USE OF THE REMAINING RESIDUE AS LIVESTOCK FEED." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s25.27.

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Moringa oleifera, commonly known as horse radish tree or drumstick tree is a perennial multipurpose tropical tree. It can be used as medicine, cosmetic and functional food, among others. The benefits of using the leaves are ascribed to the presence of a number of antioxidants. Nowadays it is widely cultivated and naturalized in many countries. Simple methods to extract antioxidants from Moringa leaf are lacking, which were established, stability of antioxidants was assessed, and residue left after extraction was explored for use as animal feed, with the aim to scale-up the process to industria

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