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Caroline Oakland, Jaymie R Meliker
BACKGROUND: Few studies have investigated the association between radon and thyroid cancer despite the sensitivity of the thyroid gland to radiation. Our goal is to investigate the association between county-level radon and incidence of female thyroid cancer in the US States of Iowa, New Jersey, and Wisconsin. METHODS: Thyroid cancer incidence data were provided by individual state cancer registries and span 1990-2013. Radon data come from a publicly available third-party database, AirChek, accessed in 2017...
March 16, 2018: Toxics
V Moreno, J Bach, M Zarroca, Ll Font, C Roqué, R Linares
Radon levels in the soil and groundwater in the North Maladeta Fault area (located in the Aran Valley sector, Central Pyrenees) are analysed from both geological and radiation protection perspectives. This area is characterized by the presence of two important normal faults: the North Maladeta fault (NMF) and the Tredós Fault (TF). Two primary aspects make this study interesting: (i) the NMF shows geomorphic evidence of neotectonic activity and (ii) the presence of a thermal spa, Banhs de Tredós, which exploits one of the several natural springs of the area and needs to be evaluated for radiation dosing from radon according to the European regulation on basic safety standards for protection against ionizing radiation...
March 12, 2018: Journal of Environmental Radioactivity
Ajay Kumar, Sumit Sharma, Rohit Mehra, Saurabh Narang, Rosaline Mishra
Background The inhalation doses resulting from the exposure to radon, thoron, and their progeny are important quantities in estimating the radiation risk for epidemiological studies as the average global annual effective dose due to radon and its progeny is 1.3 mSv as compared to that of 2.4 mSv due to all other natural sources of ionizing radiation. Objectives The annual inhalation dose has been assessed with an aim of investigating the health risk to the inhabitants of the studied region. Methods Time integrated deposition based222 Rn/220 Rn sensors have been used to measure concentrations in 146 dwellings of Udhampur district, Jammu and Kashmir...
March 15, 2018: International Journal of Occupational and Environmental Health
David Müller, Andreas Otto, Günter Radons
We show that the output of systems with time-varying delay can exhibit a new kind of chaotic behavior characterized by laminar phases, which are periodically interrupted by irregular bursts. Within each laminar phase the output intensity remains almost constant, but its level varies chaotically from phase to phase. In scalar systems, the periodic dynamics of the lengths and the chaotic dynamics of the intensity levels can be understood and also tuned via two one-dimensional maps, which can be deduced from the nonlinearity of the delay equation and from the delay variation, respectively...
February 23, 2018: Physical Review Letters
J B Albert, G Anton, I Badhrees, P S Barbeau, R Bayerlein, D Beck, V Belov, M Breidenbach, T Brunner, G F Cao, W R Cen, C Chambers, B Cleveland, M Coon, A Craycraft, W Cree, T Daniels, M Danilov, S J Daugherty, J Daughhetee, J Davis, S Delaquis, A Der Mesrobian-Kabakian, R DeVoe, T Didberidze, J Dilling, A Dolgolenko, M J Dolinski, W Fairbank, J Farine, S Feyzbakhsh, P Fierlinger, D Fudenberg, R Gornea, K Graham, G Gratta, C Hall, E V Hansen, J Hoessl, P Hufschmidt, M Hughes, A Jamil, M J Jewell, A Johnson, S Johnston, A Karelin, L J Kaufman, T Koffas, S Kravitz, R Krücken, A Kuchenkov, K S Kumar, Y Lan, D S Leonard, G S Li, S Li, C Licciardi, Y H Lin, R MacLellan, T Michel, B Mong, D Moore, K Murray, R Nelson, O Njoya, A Odian, I Ostrovskiy, A Piepke, A Pocar, F Retière, P C Rowson, J J Russell, S Schmidt, A Schubert, D Sinclair, V Stekhanov, M Tarka, T Tolba, R Tsang, P Vogel, J-L Vuilleumier, M Wagenpfeil, A Waite, T Walton, M Weber, L J Wen, U Wichoski, G Wrede, L Yang, Y-R Yen, O Ya Zeldovich, J Zettlemoyer, T Ziegler
Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to σ/E=1.23%, the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between 0νββ and background events have been developed...
February 16, 2018: Physical Review Letters
Santiago Celaya González, Daniel Rábago Gómez, Ismael Fuente Merino, Luis Quindós López, Núria Bon Carreras, María Trinidad Valero Castell, José Luis Gutierrez Villanueva, Carlos Sainz Fernández
Radon-222, a naturally occurring radioactive gas, responsible together with its progeny of around 50% of the average effective dose received by the population, has not been regulated by law until the recent Directive 2013/51 /Euratom. Its transposition into Spanish legislation was made in the recent RD 314/2016, which sets at limit value of 500 Bq l-1 for radon-222 in water for human consumption. Intercomparison exercises, such as those carried out by IPROMA SL and the Laboratory of Environmental Radioactivity of the Cantabria University (LARUC) in November 2015 and December 2016, represent the most useful tool available for detecting problems and taking corrective actions necessary for an efficient measurement by part of the laboratories...
March 9, 2018: Radiation Protection Dosimetry
Przemysław Janas, Iwona Kucybała, Małgorzata Radoń-Pokracka, Hubert Huras
Telocytes are emerging cell population localized in the stroma of numerous organs, characterized by a distinctive morphology - small cell body with very long, slender prolongations, termed telopodes. Those cells can be found in the whole female reproductive system: in the vagina, uterus, oviducts and ovaries, mammary glands and also in the placenta. In our review, we aim at complete and transparent revision of the current knowledge of telocytes' localization and function, enriched by the analysis of the possible future direction of development of their clinical applications...
March 13, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Beáta Gavurová, Boris Popesko, Janusz K Grabara, Samuel Koróny
AIM: Access to primary health care is highly connected to the prevention of cancer mortality, since the risk factors threatening health can be early identified. The aim of this paper is, firstly, to explore similarity within and between the regions of the Slovak Republic and cancer mortality patterns, and secondly, to reveal if similar regions are characterised by the similar access to health care or risk factors occurrence. METHODS: Data on deaths by sex, type of cancer death and region from 1996 to 2014 is provided by the National Health Information Centre of Slovakia...
December 2017: Central European Journal of Public Health
Richard Pullicino, Mark Radon, Shubhabrata Biswas, Maneesh Bhojak, Kumar Das
Over the past 3 years, gadolinium-based contrast agents have been linked to MRI signal changes in the brain, which have been found to be secondary to gadolinium deposition in the brain, particularly in the dentate nuclei and globus pallidus even in patients having an intact blood-brain barrier and a normal renal function. This tends to occur more in linear agents than with macrocyclic agents. Nonetheless, there has been no significant evidence that this has any clinical consequence. We reviewed the current evidence related to this new phenomenon and the precautionary approach taken by regulatory agencies...
March 9, 2018: Clinical Neuroradiology
Tobias P Loka, Simon H Tausch, Piotr Wojciech Dabrowski, Aleksandar Radonic, Andreas Nitsche, Bernhard Y Renard
Motivation: In Next Generation Sequencing (NGS), re-identification of individuals and other privacy-breaching strategies can be applied even for anonymized data. This also holds true for applications in which human DNA is acquired as a by-product, e.g. for viral or metagenomic samples from a human host. Conventional data protection strategies including cryptography and post-hoc filtering are only appropriate for the final and processed sequencing data. This can result in an insufficient level of data protection and a considerable time delay in the further analysis workflow...
March 6, 2018: Bioinformatics
Ellen T Chang, Edmund C Lau, Cynthia Van Landingham, Kenny S Crump, Roger O McClellan, Suresh H Moolgavkar
No abstract text is available yet for this article.
March 7, 2018: American Journal of Epidemiology
Perko Vukotic, Nevenka Antovic, Andrija Djurovic, Ranko Zekic, Nikola Svrkota, Tomislav Andjelic, Ranko Svrkota, Radivoje Mrdak, Natasa Bjelica, Tamara Djurovic, Aleksandar Dlabac, Marija Bogicevic
The first nationwide indoor radon survey in Montenegro started in 2002 and year-long radon measurements with CR-39 track-etch detectors, within the national grid of 5 km × 5 km and local grids in urban areas of 0.5 km × 0.5 km, were performed in homes in half of the country's territory. The survey continued in 2014 and measurements in the rest of the country were completed at the end of 2015. The 953 valid results, obtained in the national radon survey, give an average radon activity concentration in Montenegrin homes of 110 Bq/m3 ...
February 28, 2018: Journal of Environmental Radioactivity
Giorgia Cinelli, Tore Tollefsen, Peter Bossew, Valeria Gruber, Konstantins Bogucarskis, Luca De Felice, Marc De Cort
The European Atlas of Natural Radiation is a collection of maps displaying the levels of natural radioactivity caused by different sources. It has been developed and is being maintained by the Joint Research Centre (JRC) of the European Commission, in line with its mission, based on the Euratom Treaty: to collect, validate and report information on radioactivity levels in the environment of the EU Member States. This work describes the first version of the European Atlas of Natural Radiation, available in digital format through a web portal, as well as the methodology and results for the maps already developed...
February 26, 2018: Journal of Environmental Radioactivity
Jadwiga Kuciel-Lewandowska, Jan Gnus, Lilla Pawlik-Sobecka, Sylwia Płaczkowska, Izabela Kokot, Michał Kasperczak, Małgorzata Paprocka-Borowicz
Introduction: The sources of Reactive Oxidative Species (ROS) in the organism are the respiratory processes occurring in cells catalyzed by different enzymes. Operation of ROS is balanced by antioxidants, the compounds; although present in low concentrations, they significantly inhibit the degree of oxidation of particular molecules. The Aim of the Study: The aim of this study was to assess the changes in the integrated antioxidant system under the influence of radon therapy in osteoarthritis patients...
2018: BioMed Research International
J Elío, Q Crowley, R Scanlon, J Hodgson, L Zgaga
Radon is a naturally occurring gas, classified as a Class 1 human carcinogen, being the second most significant cause of lung cancer after tobacco smoking. A robust spatial definition of radon distribution in the built environment is therefore essential for understanding the relationship between radon exposure and its adverse health effects on the general population. Using Ireland as a case study, we present a methodology to estimate an average indoor radon concentration and calculate the expected radon-related lung cancer incidence...
February 24, 2018: Environment International
Naomi H Harley
Guidelines for occupational exposure to radiation are based on annual absorbed or effective dose. Guidelines for Rn exposure are currently based on air concentrations of Rn or decay products. Models of bronchial dose from decay product exposure are based on calculations that have five major parameters with parameter variabilities ranging from 20 to 50%. Many countries currently use the ICRP dose conversion convention, which is a ratio of lifetime Rn lung cancer risk to lifetime atomic bomb dose risk. The results of ongoing epidemiology changed both lifetime risk values, and the dose conversion convention has increased by a factor of 2...
April 2018: Health Physics
Elizabeth D Ellis, John D Boice, Ashley P Golden, David J Girardi, Sarah S Cohen, Michael T Mumma, Roy E Shore, Richard W Leggett, George D Kerr
Mallinckrodt Chemical Works was the earliest uranium processing facility in the Manhattan Project, beginning in 1942. Even then, concern existed about possible health effects resulting from exposure to radiation and pitchblende dust. This concern was well founded as the facility processed Belgian Congo pitchblende ore that was up to 60% pure uranium with high U content and up to 100 mg of radium per ton. Workers were exposed to external gamma radiation plus internal radiation from inhalation and ingestion of pitchblende dust (uranium, radium, and silica)...
April 2018: Health Physics
John D Boice, Elizabeth D Ellis, Ashley P Golden, David J Girardi, Sarah S Cohen, Heidi Chen, Michael T Mumma, Roy E Shore, Richard W Leggett
The purpose of this paper is to present an overview of ongoing work on the Million Worker Study (MWS), highlighting some of the key methods and progress so far as exemplified by the study of workers at the Mallinckrodt Chemical Works (MCW). The MWS began nearly 25 y ago and continues in a stepwise fashion, evaluating one study cohort at a time. It includes workers from U.S. Department of Energy (DOE) Manhattan Project facilities, U.S. Nuclear Regulatory Commission (NRC) regulated nuclear power plants, industrial radiographers, U...
April 2018: Health Physics
T Kuo, W Chen, C Ho
Recurrent groundwater radon anomalies were observed at the Paihe spring (P1) in southwestern Taiwan prior to the Mw 6.3 Jiasian and Mw 6.4 Meinong earthquakes that occurred on March 4, 2010 and February 5, 2016, respectively. Specifically, the concentration of groundwater radon decreased from background levels of 144 ± 7 and 137 ± 8 pCi/L to minima of 104 ± 8 and 97 ± 9 pCi/L prior to the 2010 Jiasian and 2016 Meinong earthquakes, respectively. The Paihe spring (P1) is located 46 km and 45 km, respectively, from the epicenters of the 2010 Mw 6...
February 16, 2018: Applied Radiation and Isotopes
Tae Hyun Park, Dae Ryong Kang, Si Hyun Park, Dan Ki Yoon, Cheol Min Lee
The purpose of this study is to provide basic data for the evaluation and management of health effects with respect to exposure to radon within residential environments in South Korea. It is part of a case-control study to develop a management plan based on indoor radon exposure levels and assess their impact on health. To investigate the long-term cumulative concentration levels of radon, 599 patients who have respiratory diseases were recruited in South Korea, and alpha track detectors were installed in their residences for a period of 3 months from mid-2015 to late 2016...
February 21, 2018: Environmental Science and Pollution Research International
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