Showing 181 - 200 results of 281 for search '"radioactivity"', query time: 0.06s Refine Results
  1. 181

    Detector Dead Time Determination and Optimal Counting Rate for a Detector Near a Spallation Source or a Subcritical Multiplying System by V. Bécares, J. Blázquez

    Published 2012-01-01
    “…The operation of accelerator-driven systems or spallation sources requires the monitoring of intense neutron fluxes, which may be billions-fold more intense than the fluxes obtained with usual radioactive sources. If a neutron detector is placed near a very intense source, it can become saturated because of detector dead time. …”
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  2. 182

    Radiation Effects in Nuclear Ceramics by L. Thomé, S. Moll, A. Debelle, F. Garrido, G. Sattonnay, J. Jagielski

    Published 2012-01-01
    “…In this latter field, ceramics can be used as immobilization forms for radioactive wastes, inert fuel matrices for actinide transmutation, cladding materials for gas-cooled fission reactors, and structural components for fusion reactors. …”
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  3. 183

    Quantitative assessment of brain metabolism in mice using non-contrast MRI at 11.7T by Xiuli Yang, Yuguo Li, Hanzhang Lu, Zhiliang Wei

    Published 2025-06-01
    “…Positron emission tomography (PET) is the gold standard for measuring metabolic rates using radioactive tracers. However, its application in preclinical studies, particularly with rodent animals, is constrained by the need for arterial input function measurements and on-site cyclotron facilities for tracer preparation. …”
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  4. 184

    Effective Atomic Number Determination of Rare Earth Oxides with Scattering Intensity Ratio by A. Turşucu, D. Demir, P. Önder

    Published 2013-01-01
    “…Effective atomic numbers () of scientific samples (rare earth) were determined experimentally by scattering of 59.54 keV gamma photons from 5 Ci 241Am annular radioactive source. The scattered gamma photons were collected by using a high-resolution HPGe semiconductor detector placed at to the incident beam. …”
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  5. 185

    DETERMINATION OF WATER QUALITY IN SPRINGS OF EKATERINBURG CITY AND SVERDLOVSK OBLAST by Vladimir S. Semenishchev, Svetlana M. Titova, Anna V. Voronina

    Published 2020-10-01
    “…We determined that water in only 7 springs (22%) fully met the requirements of sanitary norms from the point of view of content of chemical and radioactive pollutants. In 17 cases, water did not meet the requirements of the norms for the chemical factor, in 4 cases – for the radiation factor, and in 3 cases – for both the chemical and radiation factors. …”
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  6. 186

    Calculation of Lead-Iron Double-Layer Thickness for Gamma-Ray Shielding by MATLAB Program by Sarai Lekchaum, Kitsakorn Locharoenrat

    Published 2017-01-01
    “…This contribution is aimed at designing the optimal thickness of lead-iron double-layer container to store a radioactive waste releasing the photon energy at 1.3325 MeV and initial radiation intensity at 100 mSv/hr using the optimization design by MATLAB software. …”
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  7. 187

    Levothyroxine malabsorption following sleeve gastrectomy by Elodie Gruneisen, Ji Wei Yang, Melissa-Rosina Pasqua

    Published 2025-01-01
    “…We present a 47-year-old woman with class III obesity and a history of papillary thyroid cancer, with an excellent biochemical and structural response after total thyroidectomy and radioactive iodine. She underwent sleeve gastrectomy 3 years later and developed refractory hypothyroidism despite taking high doses of oral LT4 and ensuring compliance. …”
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  8. 188

    Britain’s Safety Arguments: French Nuclear Testing in Algeria duringNigerian Decolonisation (1959-60) by Chloë Mayoux

    Published 2024-10-01
    “… France’s decision to hold its first nuclear tests in the Algerian Sahara, at a time when the question of the health effects of radioactive fallout was a matter of scientific controversy, gave Africans political as well as scientific arguments to oppose French policy. …”
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  9. 189

    Discoloration Effects of High-Dose γ-Irradiation and Long-Term Thermal Aging of (U)HMW-PE by Anja Kömmling, Emmanouil Chatzigiannakis, Jörg Beckmann, Volker Wachtendorf, Kerstin von der Ehe, Ulrike Braun, Matthias Jaunich, Ulrich Schade, Dietmar Wolff

    Published 2017-01-01
    “…Two polyethylene types with ultra-high (UHMW-PE) and high molecular weight (HMW-PE) used as neutron radiation shielding materials in casks for radioactive waste were irradiated with doses up to 600 kGy using a 60Co gamma source. …”
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  10. 190

    Antibiotic, Pesticide, and Microbial Contaminants of Honey: Human Health Hazards by Noori Al-Waili, Khelod Salom, Ahmed Al-Ghamdi, Mohammad Javed Ansari

    Published 2012-01-01
    “…Honey and other bee products are polluted by pesticides, heavy metals, bacteria and radioactive materials. Pesticide residues cause genetic mutations and cellular degradation and presence of antibiotics might increase resistant human or animal's pathogens. …”
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  11. 191

    Identification of meibomian gland testosterone metabolites produced by tissue-intrinsic intracrine deactivation activity by Khanh Tien Nguyen Pham, Takahito Miyake, Tomo Suzuki, Shigeru Kinoshita, Yuki Hamada, Hikari Uehara, Mamiko Machida, Takeshi Nakajima, Emi Hasegawa, Masao Doi

    Published 2025-02-01
    “…Here, we performed radioactive tracer studies in combination with pharmacological enzyme inhibition, followed by targeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis, and found three androgen metabolites—androstanedione, androsterone, and epiandrosterone—in mouse and human meibomian glands. …”
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  12. 192

    On Some Fundamental Peculiarities of the Traveling Wave Reactor by V. D. Rusov, V. A. Tarasov, I. V. Sharph, V. N. Vashchenko, E. P. Linnik, T. N. Zelentsova, M. E. Beglaryan, S. A. Chernegenko, S. I. Kosenko, V. P. Smolyar

    Published 2015-01-01
    “…On the basis of the condition for nuclear burning wave existence in the neutron-multiplying media (U-Pu and Th-U cycles) we show the possibility of surmounting the so-called dpa-parameter problem and suggest an algorithm of the optimal nuclear burning wave mode adjustment, which is supposed to yield the wave parameters (fluence/neutron flux, width and speed of nuclear burning wave) that satisfy the dpa-condition associated with the tolerable level of the reactor materials radioactive stability, in particular that of the cladding materials. …”
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  13. 193

    Splenectomy for Solitary Splenic Metastasis in Recurrent Papillary Thyroid Cancer. A Case Report and Literature Review by Antonio Maffuz-Aziz, Gabriel Garnica, Silvia López-Hernández, Janet Pineda-Diaz, Javier Baquera-Heredia, Patricia López-Jiménez

    Published 2020-01-01
    “…Herein, we present a 52-year-old male, who developed spleen metastases, 2.4 years after total thyroidectomy and central neck dissection followed by radioactive iodine ablation and seven months after treatment with sorafenib for lung metastases. …”
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  14. 194

    Tritium Separation and Purification Technology of Low Level Wastewater by Shikai GUO, Feng CUI, Xuejun HAN

    Published 2025-02-01
    “…This work conducted the first radioactive thermal trial for tritium separation and purification from the real low-level tritiated wastewater. …”
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  15. 195

    Carbonate Chemistry and Isotope Characteristics of Groundwater of Ljubljansko Polje and Ljubljansko Barje Aquifers in Slovenia by Sonja Cerar, Janko Urbanc

    Published 2013-01-01
    “…Four groups of groundwater were identified: (1) Ljubljansko polje aquifer, with higher Ca2+ values, as limestone predominates in its recharge area, (2) northern part of Ljubljansko Barje aquifer, with prevailing dolomite in its recharge area, (3) central part of Ljubljansko Barje aquifer, which lies below surface cover of impermeable clay and is poor in carbonate, and (4) Brest and Iški vršaj aquifer in the southern part of Ljubljansko Barje with higher Mg2+ in groundwater and dolomite prevailing in its recharge area. The radioactive isotope tritium was also used to estimate the age of groundwater. …”
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  16. 196

    Strains, Mechanism, and Perspective: Salmonella-Based Cancer Therapy by Cheng-Zhi Wang, Robert A. Kazmierczak, Abraham Eisenstark

    Published 2016-01-01
    “…Furthermore, bacterial clinical treatments for cancer have been improved by combination with other therapeutic methods such as chemotherapeutic drugs and radioactive agents. Synthetic biology techniques have also driven the development of new bacterial-based cancer therapies. …”
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  17. 197

    Annexin A5–Functionalized Nanoparticle for Multimodal Imaging of Cell Death by Rui Zhang, Miao Huang, Min Zhou, Xiaoxia Wen, Qian Huang, Chun Li

    Published 2013-05-01
    “…In contrast, there was relatively low signal in the corresponding tissues of control mice. Moreover, the radioactive signal from 111 In-labeled annexin A5–CCPM colocalized with its fluorescence signal, and both signals were confined to regions of dying cells. 111 In-labeled annexin A5–CCPM allows visualization of cell death by both nuclear and optical techniques at the whole-body level as well as at the microscopic level. …”
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  18. 198

    Dose and risk assessment of radon in three rooms with varying ventilation levels using RESRAD-BIULD software by Alhamdi Walat A.H.

    Published 2024-01-01
    “…Radon, a radioactive gas, poses a significant health risk when accumulated in indoor environments. …”
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  19. 199

    Design and Analysis of Nuclear Transportation Cask Using Phase Changing Material by Girish Venkatesh Gudi, R. G. Nagraj, Abhijit Dandavate

    Published 2025-01-01
    “…In the nuclear sector, secure transportation of radioactive materials is crucial in the nuclear sector, and cask design and analysis are crucial for maintaining fuel integrity. …”
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  20. 200

    Insight on intrusion behavior of compacted bentonite with accessory-mineral ring: a modelling approach by Libo Xu, Libo Xu, Junneng Ye, Yanming Yao

    Published 2025-01-01
    “…Investigating the intrusion behavior of buffer/backfill materials is a critical aspect in the design of high-level radioactive waste (HLW) disposal repositories. This study proposes an intrusion model that accounts for the influence of the accessory-mineral ring and refines it by incorporating the specimen saturation process. …”
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