keyword
MENU ▼
Read by QxMD icon Read
search

137Cs

keyword
https://www.readbyqxmd.com/read/29149320/organic-scintillator-for-real-time-neutron-dosimetry
#1
Kyle A Beyer, Angela Di Fulvio, Liliana Stolarczyk, Wiktor Parol, Natalia Mojzeszek, Renata Kopéc, Shaun D Clarke, Sara A Pozzi
We developed a radiation detector based on an organic scintillator for spectrometry and dosimetry of out-of-field secondary neutrons from clinical proton beams. The detector consists of an EJ-299-34 crystalline organic scintillator, coupled by fiber optic cable to a silicon photomultiplier (SiPM). Proof of concept measurements were taken with 137Cs and 252Cf, and corresponding simulations were performed in MCNPX-PoliMi. Despite its small size, the detector is able to discriminate between neutron and gamma-rays via pulse shape discrimination...
November 15, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29136641/radioactive-contamination-in-the-tokyo-metropolitan-area-in-the-early-stage-of-the-fukushima-daiichi-nuclear-power-plant-fdnpp-accident-and-its-fluctuation-over-five-years
#2
Masanobu Ishida, Hideo Yamazaki
Radioactive contamination in the Tokyo metropolitan area in the immediate aftermath of the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was analyzed via surface soil sampled during a two-month period after the accident. 131I, 134Cs, and 137Cs were detected in these soil samples. The activity and inventory of radioactive material in the eastern part of Tokyo tended to be high. The 134Cs/137Cs activity ratio in soil was 0.978 ± 0.053. The 131I/137Cs ratio fluctuated widely, and was 19.7 ± 9.0 (weighted average 18...
2017: PloS One
https://www.readbyqxmd.com/read/29106600/chronic-irradiation-with-low-dose-rate-137cs-%C3%AE-rays-inhibits-ngf-induced-neurite-extension-of-pc12-cells-via-ca2-calmodulin-dependent-kinase-ii-activation
#3
Katoh Shinsuke, Kobayashi Junya, Umeda Tomonobu, Kobayashi Yoshiko, Nobuo Izumo, Suzuki Takahiko
Chronic irradiation with low-dose-rate 137Cs-γ rays inhibits the differentiation of human neural progenitor cells and influences the expression of proteins associated with several cellular functions. We aimed to determine whether such chronic irradiation influences the expression of proteins associated with PC12 cells. Chronic irradiation at 0.027 mGy/min resulted in inhibition of NGF-induced neurite extension. Furthermore, irradiation enhanced the nerve growth factor (NGF)-induced increase in the phosphorylation of extracellular signal-regulated kinase (ERK), but did not affect the phosphorylation of NGF receptors, suggesting that irradiation influences pathways unassociated with the activation of ERK...
June 30, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29053862/a-study-of-the-radioactivity-in-the-dust-storm-event-of-april-2015-in-arabian-peninsula
#4
Zaid Q Ababneh, Anas M Ababneh, Sultan Alsagabi, Fahad I Almasoud
Gulf countries are often affected by dust storms which have a significant influence on the environment and public health. The present work examines the radioactivity content in the intense dust storm occurred over Gulf countries on 1 April 2015. The results showed that the average value of 137Cs in dust samples (±SD) is 14.4 ± 1.6 Bq/kg, which is almost two orders of magnitude larger than those in soil samples. 7Be was detected with a considerable amount only in dust samples. The activity concentrations of the natural radionuclides (234,238U, 228,230,232Th, 226,228Ra and 40K) in dust samples were found to be approximately two to three times higher than the corresponding values in soil samples, which is attributed to the abundance of the finest particle size in the dust samples...
October 19, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29036685/nuclear-heating-in-lif-dosemeters-in-a-fusion-neutron-field-trial-of-direct-comparison-of-experimental-and-simulated-results
#5
Wladyslaw Pohorecki, Barbara Obryk
The results of nuclear heating measured by means of thermoluminescent dosemeters (TLD-LiF) in a Cu block irradiated by 14 MeV neutrons are presented. The integral Cu experiment relevant for verification of copper nuclear data at neutron energies characteristic for fusion facilities was performed in the ENEA FNG Laboratory at Frascati. Five types of TLDs were used: highly photon sensitive LiF:Mg,Cu,P (MCP-N), 7LiF:Mg,Cu,P (MCP-7) and standard, lower sensitivity LiF:Mg,Ti (MTS-N), 7LiF:Mg,Ti (MTS-7) and 6LiF:Mg,Ti (MTS-6)...
September 29, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28985381/comparison-of-personal-dose-equivalent-hp-10-in-137cs-radiation-between-the-primary-standards-laboratories-of-japan-and-australia-using-beo-osl-personal-dosemeters
#6
D J Butler, T Kurasawa, M Litwin, J Mazaraki, N Saito
A comparison of personal dose equivalent Hp(10) for 137Cs radiation was conducted between the primary standards laboratories of Japan and Australia. A set of 120 commercially available passive BeO OSL dosemeters were used (Dosimetrics GmbH, Munich). The aim was to investigate the precision which could be obtained with this technique, and to confirm the personal dose equivalent delivery methods in each standards laboratory. A dose of 5 mSv was delivered to 40 dosemeters in each country, and 40 dosemeters were used as controls...
July 15, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28981916/development-of-a-new-detector-system-to-evaluate-position-and-activity-of-plutonium-particles-in-nasal-cavities
#7
Yuki Morishita, Seiichi Yamamoto, Takumaro Momose, Junichi H Kaneko, Norio Nemoto
Plutonium dioxide (PuO2) is used to fabricate a mixed oxide fuel for fast breeder reactors. When a glove box containing PuO2 fails, such as by rupture of a glove or a vinyl bag, airborne contamination of plutonium (Pu) can occur. If a worker inhales PuO2 particles, they will be continually irradiating their lung tissue with alpha particles, and this could cause lung cancer. The nasal smear and nose blow methods are useful for checking workers for PuO2 intake in the field. However, neither method can evaluate the quantitative activity of Pu...
September 8, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28957331/the-sterile-insect-technique-for-the-management-of-the-spotted-wing-drosophila-drosophila-suzukii-establishing-the-optimum-irradiation-dose
#8
Geneviève Lanouette, Jacques Brodeur, François Fournier, Véronique Martel, Marc Vreysen, Carlos Cáceres, Annabelle Firlej
The spotted wing drosophila Drosophila suzukii Matsumura (Diptera: Drosophilidae), a pest of berries stone fruits, invaded North America and Europe in 2008. Current control methods rely mainly on insecticides. The sterile insect technique (SIT) has potential as an additional control tactic for the integrated management of D. suzukii. As a step towards the development of the SIT, this study aimed at finding the optimum irradiation dose to sterilize D. suzukii under controlled laboratory conditions. Four-day-old D...
2017: PloS One
https://www.readbyqxmd.com/read/28931006/up-regulation-of-calreticulin-in-mouse-liver-tissues-after-long-term-irradiation-with-low-dose-rate-gamma-rays
#9
Lan Yi, Nan Hu, Jie Yin, Jing Sun, Hongxiang Mu, Keren Dai, Dexin Ding
The biological effects of low-dose or low-dose-rate ionizing radiation on normal tissues has attracted attention. Based on previous research, we observed the morphology of liver tissues of C57BL/6J mice that received <50, 50-500, and 500-1000 μGy/h of 137Cs radiation for 180 d. We found that the pathological changes in liver tissues were more obvious as the irradiation dose rates increased. Additionally, differential protein expression in liver tissues was analyzed using a proteomics approach. Compared with the matched group in the 2D gel analysis of the irradiated groups, 69 proteins had ≥ 1...
2017: PloS One
https://www.readbyqxmd.com/read/28895674/activity-of-cesium-137cs-and-potassium-content-in-new-potatoes-imported-to-poland
#10
Wanda Wadas, Elżbieta Królak, Jadwiga Karwowska
Background: Potatoes are an important component of the human diet. In addition to components which determine the nutrition and dietary values, potato tubers also contain anti-nutritional substances, inter alia radioactive elements. Natural and artifical radionuclides are released to the environment as a result of antropogenic activity, in a controlled or uncontrolled manner, and they are transferred to the human body through the food chain. Objective: The aim of the study was to determine the activity of radioactive cesium 137Cs isotope and potassium content, including the activity of 40K isotope, in new potatoes imported to Poland during the winter period from Mediterranean countries...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28768097/the-fate-of-contaminants-and-stable-pb-isotopes-in-a-changing-estuarine-environment-20-years-on
#11
Andrew B Cundy, Ian W Croudace
Estuarine sediments provide an important sink for contaminants discharged into fluvial, estuarine, and nearshore settings, and numerous authors have utilized this trapping function to assess historical contaminant loadings and contaminant breakdown/transformation processes. This Article examines the retention of elemental and isotopic sedimentary signatures in an industrialized estuarine system subject to a strongly upward sea-level trend, over a 20 year period. Two contrasting saltmarsh sites (at Hythe and Hamble, part of the wider Southampton Water estuarine system, UK) were examined, which had been previously cored and analyzed in the early 1990s...
August 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28732021/in-vitro-comparison-of-213bi-and-177lu-radiation-for-peptide-receptor-radionuclide-therapy
#12
COMPARATIVE STUDY
Ho Sze Chan, Erik de Blois, Alfred Morgenstern, Frank Bruchertseifer, Marion de Jong, Wouter Breeman, Mark Konijnenberg
BACKGROUND: Absorbed doses for α-emitters are different from those for β-emitters, as the high linear energy transfer (LET) nature of α-particles results in a very dense energy deposition over a relatively short path length near the point of emission. This highly localized and therefore high energy deposition can lead to enhanced cell-killing effects at absorbed doses that are non-lethal in low-LET type of exposure. Affinities of DOTA-DPhe1-Tyr3-octreotate (DOTATATE), 115In-DOTATATE, 175Lu-DOTATATE and 209Bi-DOTATATE were determined in the K562-SST2 cell line...
2017: PloS One
https://www.readbyqxmd.com/read/28714301/assessing-fukushima-derived-radiocesium-in-migratory-pacific-predators
#13
Daniel J Madigan, Zofia Baumann, Owyn E Snodgrass, Heidi Dewar, Michelle Berman-Kowalewski, Kevin C Weng, Jun Nishikawa, Peter H Dutton, Nicholas S Fisher
The 2011 release of Fukushima-derived radionuclides into the Pacific Ocean made migratory sharks, teleosts, and marine mammals a source of speculation and anxiety regarding radiocesium ((134+137)Cs) contamination, despite a lack of actual radiocesium measurements for these taxa. We measured radiocesium in a diverse suite of large predators from the North Pacific Ocean and report no detectable (i.e., ≥ 0.1 Bq kg(-1) dry wt) Fukushima-derived (134)Cs in all samples, except in one olive ridley sea turtle (Lepidochelys olivacea) with trace levels (0...
August 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28660747/reversible-and-efficient-sequestration-of-cesium-from-water-by-the-layered-metal-thiophosphate-k0-48-mn0-76-ps3-%C3%A2-h2-o
#14
Ekashmi Rathore, Provas Pal, Kanishka Biswas
Water body contamination with radioactive species is an important issue due to significant developments in nuclear energy. Cesium ((137) Cs) radioisotope is a non-actinide fission product of uranium and plutonium that is long-lived. Hence, selective removal/capture of cesium is essential for managing radioactive waste. Herein, a detailed Cs(+) ion-exchange study on a potassium intercalated layered metal thiophosphate, K0.48 Mn0.76 PS3 ⋅H2 O (K-MPS-1), is reported. The sorption of Cs(+) by K-MPS-1 follows the Langmuir model with a high capacity of 337...
June 29, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28569231/adsorption-kinetics-of-137-cs-90-sr-2-on-ca-bentonite
#15
Rong Wang, Yingying Chu, Mengjun Chen
  137Cs+/90Sr2+ adsorption kinetics on natural Ca-bentonite under the impact of different adsorption conditions was examined in detail. The results indicate that natural Ca-bentonite shows a strong adsorption capacity for Cs+/Sr2+. The adsorption reached at equilibrium after 2 hours for Cs+. Cs+/Sr2+removal efficiency reaches the highest when the pH value is 5 to 8 and increases with the increase of Ca-bentonite adding amount. Cs+ removal efficiency increases with the increase of Cs+ initial concentration, while Sr2+ removal efficiency slightly varies around 70%...
September 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28505439/anthropogenic-236-u-in-danish-seawater-global-fallout-versus-reprocessing-discharge
#16
Jixin Qiao, Peter Steier, Sven Nielsen, Xiaolin Hou, Per Roos, Robin Golser
This work focuses on the occurrence of (236)U in seawater along Danish coasts, which is the sole water-exchange region between the North Sea-Atlantic Ocean and the Baltic Sea. Seawater collected in 2013 and 2014 were analyzed for (236)U (as well as (238)U and (137)Cs). Our results indicate that (236)U concentrations in Danish seawater are distributed within a relatively narrow range of (3.6-8.2) × 10(7) atom/L and, to a certain extent, independent of salinity. (236)U/(238)U atomic ratios in Danish seawater are more than 4 times higher than the estimated global fallout value of 1× 10(-9)...
June 5, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28469106/in-vitro-dosimetric-study-of-biliary-stent-loaded-with-radioactive-125-i-seeds
#17
Li-Hong Yao, Jun-Jie Wang, Charles Shang, Ping Jiang, Lei Lin, Hai-Tao Sun, Lu Liu, Hao Liu, Di He, Rui-Jie Yang
BACKGROUND: A novel radioactive 125I seed-loaded biliary stent has been used for patients with malignant biliary obstruction. However, the dosimetric characteristics of the stents remain unclear. Therefore, we aimed to describe the dosimetry of the stents of different lengths - with different number as well as activities of 125I seeds. METHODS: The radiation dosimetry of three representative radioactive stent models was evaluated using a treatment planning system (TPS), thermoluminescent dosimeter (TLD) measurements, and Monte Carlo (MC) simulations...
May 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28444207/characterization-of-relative-biological-effectiveness-for-conventional-radiation-therapy-a-comparison-of-clinical-6-mv-x-rays-and-137cs
#18
Michelle Howard, Chris Beltran, Jann Sarkaria, Michael G Herman
Various types of radiation are utilized in the treatment of cancer. Equal physical doses of different radiation types do not always result in the same amount of biological damage. In order to account for these differences, a scaling factor known as the relative biological effectiveness (RBE) can be used. 137Cesium (137Cs) has been used as a source of radiation in a significant body of radiation therapy research. However, high-energy X-rays, such as 6 MV X-rays, are currently used clinically to treat patients...
September 1, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28370303/technical-note-monte-carlo-study-of-106-ru-106-rh-ophthalmic-plaques-including-the-106-rh-gamma-spectrum
#19
Marcelino Hermida-López, Lorenzo Brualla
PURPOSE: To assess the influence of the (106) Rh gamma spectrum on the Monte Carlo simulation of (106) Ru/(106) Rh ophthalmic plaques, which has been neglected without a quantitative estimation in all previous publications. METHODS: Simulations were run with the penelope 2014 Monte Carlo code for radiation transport. Depth-dose distributions in water were simulated for the plaque models CCA, CCC, CCX and CIA. In addition to the (106) Rh beta spectrum, all gamma components from the (106) Rh gamma spectrum were included in the simulations...
April 1, 2017: Medical Physics
https://www.readbyqxmd.com/read/28338929/performance-tests-of-active-personal-dosemeter-developed-by-%C3%A3-nrtc-nel
#20
Dogan Yasar, Enis Kapdan, Muharrem Korkmaz
The Active personal dosemeter (APD) developed by Çekmece Nuclear Research and Training Center/Nuclear Electronic Laboratory (ÇNRTC/NEL) was calibrated at the reference radiation quality (137Cs). The performance tests were carried out with 137Cs, 60Co and X-ray beam qualities in compliance with the standards of International Organization for Standardization ISO4037-1,3 and The International Electrotechnical Commission, IEC61526:2010. Response of the personal dose equivalent was observed to be within the range from -7...
March 1, 2017: Radiation Protection Dosimetry
keyword
keyword
34934
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"