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Annika Brinkmann, Koray Ergünay, Aleksandar Radonić, Zeliha Kocak Tufan, Cristina Domingo, Andreas Nitsche
BACKGROUND: We describe the development and evaluation of a novel method for targeted amplification and Next Generation Sequencing (NGS)-based identification of viral hemorrhagic fever (VHF) agents and assess the feasibility of this approach in diagnostics. METHODOLOGY: An ultrahigh-multiplex panel was designed with primers to amplify all known variants of VHF-associated viruses and relevant controls. The performance of the panel was evaluated via serially quantified nucleic acids from Yellow fever virus, Rift Valley fever virus, Crimean-Congo hemorrhagic fever (CCHF) virus, Ebola virus, Junin virus and Chikungunya virus in a semiconductor-based sequencing platform...
November 20, 2017: PLoS Neglected Tropical Diseases
K Jílek, M Slezáková, A Fronka, T Prokop, L Neubauer
During years 2010-12 an automated, on-line and wireless outdoor measurement station of atmospheric radon, gamma dose rate and meteorological parameters was realised at the National Radiation Protection Institute (NRPI) in Prague. At the turn of the year 2013 an expansion of the existing station was completed. Under the project funded by the Czech Technological Agency a new updated station was established, additionally equipped with modules for measurement of atmospheric radon/thoron short-lived decay products, radon in water and soil and radon exhalation rate from soil...
November 13, 2017: Radiation Protection Dosimetry
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Journal of Environmental Health
Ellen J Hahn, Marissa Hooper, Carol Riker, Karen M Butler, Kathy Rademacher, Amanda Wiggins, Mary Kay Rayens
Lung cancer is largely preventable by eliminating tobacco smoke and radon exposure. This exploratory study assessed the relationships of demographic factors, including having one or more smokers living in the household, and a) lung cancer worry and b) completion of home screening for radon and secondhand smoke (SHS) among renters. A convenience sample of renters (N = 47) received free test kits for radon and SHS as part of a larger study. Demographic factors, lung cancer worry, and completion of home testing were assessed at baseline...
January 2017: Journal of Environmental Health
Sung Ho Hwang, Jae Bum Park, Wha Me Park
In this study, the environmental factors that affect radon (Rn) and nitrogen dioxide (NO2) levels in subway-station underground platforms are evaluated, and the outdoor NO2 levels are compared with those obtained for the underground platforms. The Rn and NO2 levels from May 2013 to September 2015 are determined for lines 1-4 of the Seoul Metro, via calculation of the arithmetic means of the Rn and NO2 levels with their standard deviations (SDs). The underground Rn levels in 2013 are found to be significantly higher than those recorded in 2015 for the Seoul Metro...
November 10, 2017: Journal of Environmental Radioactivity
Alberto Ruano-Ravina, Karl T Kelsey, Alberto Fernández-Villar, Juan M Barros-Dios
No abstract text is available yet for this article.
November 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Douglas R Tait, Damien Troy Maher, Wei Wen Wong, Isaac R Santos, Mahmood Sadat-Noori, Ceylena Holloway, Perran Louis Miall Cook
Estuaries are an important source of greenhouse gases to the atmosphere, but uncertainties remain in the flux rates and production pathways of greenhouse gases in these dynamic systems. This study performs simultaneous high resolution measurements of the three major greenhouse gases (carbon dioxide, methane, and nitrous oxide) as well as carbon stable isotope ratios of carbon dioxide and methane, above and below the pycnocline along a salt wedge estuary (Yarra River estuary, Australia). We identified distinct zones of elevated greenhouse gas concentrations...
November 8, 2017: Environmental Science & Technology
Desiderio Passali, Giacomo Gabelli, Giulio Cesare Passali, Ralph Mösges, Luisa Maria Bellussi
Background Radon-222-enriched hot spring therapy, which is characterized by a safe level of radioactivity, is used for the treatment of rheumatic disorders, and its efficacy has already been studied in several clinical trials. Radon-water inhalation therapy for the treatment of upper and lower airway inflammatory diseases is used in many hot springs centers. However, its application has not been reviewed to date. Methods We systematically searched the PubMed and Scopus databases for clinical trials published in the last 20 years in which objective parameters of upper and lower airway function had been tested before and after radon-enriched inhalation treatment...
August 31, 2017: Otolaryngologia Polska
S Pierre, B Sabot, P Cassette, J Liang, S Courte, L Ferreux, G Ratel
Two main non-destructive techniques can be used to measure standard (222)Rn gas ampoules: well-type ionization chambers and gamma-ray spectrometry, the former being used in the Système International de Référence (SIR) for international comparison purposes. The reliability of these techniques requires that the variability of the flame-sealed gas glass ampoules used have a negligible influence on the detector response. This variability is studied in this work by considering three parameters: the volume of the ampoule, the position of the sealing point and the thickness of the glass...
October 31, 2017: Applied Radiation and Isotopes
Scott Pigg, Dan Cautley, Paul W Francisco
Residential energy efficiency retrofits continue to be common in the United States, especially through governmental and utility programs. Because of the potential for reduced air exchange, there have been concerns raised regarding the potential for negative impacts on health and safety of residents when air sealing occurs. To address this concern, a study was undertaken in 2009-2010 to evaluate the indoor air quality impacts of weatherization performed through the U.S. Department of Energy's Weatherization Assistance Program...
November 6, 2017: Indoor Air
Jácint Jónás, János Somlai, Anita Csordás, Edit Tóth-Bodrogi, Tibor Kovács
In petroleum engineering, the produced drilling mud sometimes contains elevated amounts of natural radioactivity. In this study, a remediated Hungarian drilling mud depository was investigated from a radiological perspective. The depository was monitored before and after a clay layer was applied as covering. In this study, the ambient dose equivalent rate H*(10) of the depository has been measured by a Scintillator Probe (6150AD-b Dose Rate Meter). Outdoor radon concentration, radon concentration in soil gas, and in situ field radon exhalation measurements were carried out using a pulse-type ionization chamber (AlphaGUARD radon monitor)...
November 2, 2017: Journal of Environmental Radioactivity
Stefan Grimme, Christoph Bannwarth, Eike Caldeweyher, Jana Pisarek, Andreas Hansen
A black-box type procedure is presented for the generation of a molecule-specific, intermolecular potential energy function. The method uses quantum chemical (QC) information from our recently published extended tight-binding semi-empirical scheme (GFN-xTB) and can treat non-covalently bound complexes and aggregates with almost arbitrary chemical structure. The necessary QC information consists of the equilibrium structure, Mulliken atomic charges, charge centers of localized molecular orbitals, and also of frontier orbitals and orbital energies...
October 28, 2017: Journal of Chemical Physics
Georgy Malinovsky, Ilia Yarmoshenko, Michael Zhukovsky
OBJECTIVES: Cohen's ecological analyses revealed negative correlation between the lung cancer mortality and average indoor radon concentration in the US counties, that contradicts to linear non-threshold (LNT) model and is inconsistent with results of case-control studies. The aim of the study was to analyze dependence between radon exposure and lung cancer mortality rate taking into account more complete data on smoking and new findings on association of the lung cancer with human papillomavirus (HPV) infection...
November 2, 2017: International Journal of Radiation Biology
Fabio Daniel Barazza, Christophe Murith, Martha Palacios, Walther Gfeller, Emanuel Christen
We present and discuss the results of a national survey on radon remediation. The main purpose of the survey was the evaluation of the rate of radon remediation in Switzerland and to identify the main reasons for not taking action in cases of high radon levels. Switzerland is strongly affected by the radon problem and extensive efforts have been made to map the radon potential and to investigate the most effective methods to reduce radon levels in different buildings. However, since the radon remediation of buildings has been given over to experts in the private sector and since there is no obligation to report a finished remediation to the authorities, it is difficult for the Federal Office for Public Health (FOPH) to track the activities in this field...
November 2, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
Touka Banaee, Hamidreza Pourreza, Hassan Doosti, Mojtaba Abrishami, Asieh Ehsaei, Mohsen Basiry, Reza Pourreza
PURPOSE: To compare the distribution of different sized vessels using digital photographs of the ocular surface of diabetic and normal individuals. METHODS: In this cross-sectional study, red-free conjunctival photographs of diabetic and normal individuals, aged 30-60 years, were taken under defined conditions and analyzed using a Radon transform-based algorithm for vascular segmentation. The image areas occupied by vessels (AOV) of different diameters were calculated...
October 2017: Journal of Ophthalmic & Vision Research
María Teresa Solis-Soto, Anabel Schön, Angel Solis-Soto, Manuel Parra, Katja Radon
BACKGROUND: Musculoskeletal disorders (MSD) are important health problems in working populations. The study aimed to determine the prevalence of MSD among school teachers from urban and rural areas in Chuquisaca, Bolivia. METHODS: A cross-sectional study was conducted in 60 randomly selected schools. In total, 1062 teachers were invited to participate (response 58%). The Spanish version of the Standardized Nordic questionnaire was used assessing the 12-months and 7-days prevalence of MSD as well as the 12-months prevalence of work limiting pain...
October 27, 2017: BMC Musculoskeletal Disorders
V Fomenko, B Moreno, M Million, J Harrison, M Akselrod
The neutron-energy dependence of the track-counting sensitivity of fluorescent nuclear track detectors (FNTDs) at two ranges of Mg doping, resulting in different crystal colorations, was investigated. The performance of FNTDs was studied with the following converters: Li-glass for thermal to intermediate-energy neutrons, polyethylene for fast neutrons, and polytetrafluoroethylene (Teflon™) for photon- and radon-background subtraction. The irradiations with monoenergetic neutrons were performed at the National Physics Laboratory (NPL), UK...
October 25, 2017: Radiation Protection Dosimetry
E R Lee, B U Chang, Y J Kim
Radon exposure in schools is different from that in dwellings because the residence pattern is very different each other. So, when effective dose is calculated in schools, different approach should be considered from in dwellings. The aim of this study was to estimate actual effective dose due to inhaled radon considering the residence time in schools. It could help avoid overestimation when effective dose is calculated in schools. The range of radon concentration in 376 schools was 18.1-2810 Bq m -3 and that of annual effective dose was estimated 0...
October 24, 2017: Radiation Protection Dosimetry
T Wilflinger, H Lettner, A Hubmer, P Bossew, B Sattler, H Slupetzky
Cryoconites ("cold dust", derived from the Greek) are aeolian sediments accumulated on glacier surfaces. In cryoconites from the surface of the Stubacher Sonnblickkees, a temperate Austrian glacier, extremely high activity concentrations of artificial and natural radionuclides were found. Artificial radionuclides stem from two clearly distinguishable sources, global fallout from the nuclear weapons testing era deposited over a period of years until roughly 1966 and the fallout from Chernobyl in 1986, which was essentially deposited as a single input during one week...
October 19, 2017: Journal of Environmental Radioactivity
Monika Mazanova, Pavel Dryak, Miroslav Havelka
The emission intensities of 186.21keV, 46.54keV, XL(Bi) and XK(Rn) photons were measured with calibrated HPGe detectors. The efficiency was computed with the MCNP Monte Carlo code and validated using experimental points. Sources of Ra-226 were prepared from two different radioactive materials. The X-ray emission intensities in Ra-226 decay were determined without X-rays from the daughter decay products using a radon emanation source. The standard CMI source with Pb-210 was used and compared with a source prepared from the NPL solution delivered under the EMRP project "Metrology for processing materials with high natural radioactivity - MetroNORM"...
October 13, 2017: Applied Radiation and Isotopes
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