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https://www.readbyqxmd.com/read/28535879/characterization-of-a-new-candidate-isotopic-reference-material-for-natural-pb-using-primary-measurement-method
#1
Naoko Nonose, Toshihiro Suzuki, Ki-Cheol Shin, Tsutomu Miura, Akiharu Hioki
A lead isotopic standard solution with natural abundance has been developed by applying a mixture of a solution of enriched (208)Pb and a solution of enriched (204)Pb ((208)Pb-(204)Pb double spike solution) as bracketing method. The amount-of-substance ratio of (208)Pb:(204)Pb in this solution is accurately measured by applying EDTA titrimetry, which is one of the primary measurement methods, to each enriched Pb isotope solution. Also metal impurities affecting EDTA titration and minor lead isotopes contained in each enriched Pb isotope solution are quantified by ICP-SF-MS...
June 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28534155/myocardial-delayed-enhancement-ct-initial-experience-in-children-and-young-adults
#2
Hyun Woo Goo
BACKGROUND: Clinical utility of myocardial delayed enhancement CT has not been reported in children and young adults. OBJECTIVE: To describe initial experience of myocardial delayed enhancement CT regarding image quality, radiation dose and identification of myocardial lesions in children and young adults. MATERIALS AND METHODS: Between August 2013 and November 2016, 29 consecutive children and young adults (median age 16 months) with suspected coronary artery or myocardial abnormality underwent arterial- and delayed-phase cardiac CT at our institution...
May 23, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28528235/mapping-natural-radioactivity-of-soil-samples-in-different-regions-of-punjab-india
#3
Komal Saini, B S Bajwa
Thallium activated sodium iodide (NaI(Tl)) detector and multi channel analyzer has been utilized to measure gamma rays emitted by radio nuclides found in soil samples of south-west (SW) region of Punjab state, India where elevated level of uranium of around value of 700µg/l in groundwater has been reported. For comparative study, soil samples were also collected and analyzed from west (W) and north east (NE) regions of the state. Uranium and potassium has been found to be comparatively higher in SW region whereas thorium level is higher in W and NE part of Punjab state...
May 13, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28514699/profiling-of-illicit-cocaine-seized-in-china-by-icp-ms-analysis-of-inorganic-elements
#4
Cuimei Liu, Zhendong Hua, Xin Meng
For the first time in China, the inorganic element profiling of cocaine specimens was performed at the National Narcotics Laboratory. An inductive coupled plasma-mass spectrometry (ICP-MS) method was developed and validated for simultaneous analysis of 26 inorganic elements, including sodium (Na), magnesium (Mg), aluminuim (Al), potassium (K), calcium (Ca), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), selenium (Se), molybdenum (Mo), silver (Ag), cadmium (Cd), antimony (Sb), barium (Ba), lanthanum (La), cerium (Ce), thallium (Tl), lead (Pb), thorium (Th), and uranium (U) in illicit cocaine samples...
April 29, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28470630/characteristics-of-single-and-dual-photopeak-energy-window-acquisitions-with-thallium-201-iq-spect-ct-system
#5
Takayuki Shibutani, Masahisa Onoguchi, Hiroto Yoneyama, Takahiro Konishi, Shinro Matsuo, Kenichi Nakajima, Seigo Kinuya
OBJECTIVES: Although dual-energy (DE) acquisition with conventional (201)Tl myocardial perfusion SPECT has several advantages such as improved attenuation of the inferior wall and increased acquisition counts, the characteristics of IQ-SPECT have not been fully evaluated. We evaluate the difference of characteristics between single-energy (SE) and dual-energy (DE) imaging using (201)Tl myocardial IQ-SPECT. METHODS: Two myocardial phantoms were created simulating normal myocardium and infarction of the inferior wall...
May 3, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28469335/pediatric-osteosarcoma-an-updated-review
#6
REVIEW
Shachi Jain Taran, Rakesh Taran, Nagraj B Malipatil
Osteosarcoma (OS), the most common type of primary malignant bone tumor, is defined by the presence of malignant mesenchymal cells producing osteoid or immature bone. The peak incidence of the most frequent type of OS, i.e., high-grade central OS, occurs in the second decade of life during the adolescent growth spurt. Most patients suffer from the pain and swelling in the involved region and, usually, seek medical attention. Diagnosis is carried out by conventional radiographs, computed tomography, and magnetic resonance image (MRI)...
January 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/28458220/chemistry-and-phase-evolution-during-roasting-of-toxic-thallium-bearing-pyrite
#7
Paula Lopez-Arce, Javier Garcia-Guinea, Fernando Garrido
In the frame of a research project on microscopic distribution and speciation of geogenic thallium (Tl) from contaminated mine soils, Tl-bearing pyrite ore samples from Riotinto mining district (Huelva, SW Spain) were experimentally fired to simulate a roasting process. Concentration and volatility behavior of Tl and other toxic heavy metals was determined by quantitative ICP-MS, whereas semi-quantitative mineral phase transitions were identified by in situ thermo X-Ray Diffraction (HT-XRD) and Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) analyses after each firing temperature...
April 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28444610/publicly-available-datasets-on-thallium-tl-in-the-environment-a-comment-on-presence-of-thallium-in-the-environment-sources-of-contaminations-distribution-and-monitoring-methods-by-bozena-karbowska-environ-monit-assess-2016-188-640-doi-10-1007-s10661-016-5647
#8
Patrice de Caritat, Clemens Reimann
This comment highlights a whole series of datasets on thallium concentrations in the environment that were overlooked in the recent review by Karbowska, Environmental Monitoring and Assessment, 188, 640, 2016 in this journal. Geochemical surveys carried out over the last few decades all over the world at various scales and using different sampling media have reported the concentration of thallium (and dozens more elements) in tens of thousands of samples. These datasets provide a 'real-world' foundation upon which source apportionment investigations can be based, monitoring programs devised and modelling studies designed...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28435706/substitution-of-indium-for-chromium-in-tlin5-x-cr-x-se8-crystal-structure-of-tlin4-811-5-cr0-189-5-se8
#9
Robin Lefèvre, David Berthebaud, Franck Gascoin
The new thallium penta-(indium/chromium) octa-selenide, TlIn4.811(5)Cr0.189(5)Se8, has been synthesized by solid-state reaction. It crystallizes isotypically with TlIn5Se8 in the space group C2/m. Although the two Tl positions are disordered and only partially occupied, no Tl deficiency was observed. The insertion of chromium in the structure has been confirmed by EDS analysis. Chromium substitutes indium exclusively at one of three In sites, viz. at one of the positions with site symmetry 2/m (Wyckoff position 2a)...
April 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28432490/thallium-201-washout-rate-of-stress-myocardial-perfusion-imaging-as-a-predictor-of-mortality-in-diabetic-kidney-disease-patients-initiating-hemodialysis-an-observational-follow-up-study
#10
Toshihide Hayashi, Nobuhiko Joki, Yuri Tanaka, Masaki Iwasaki, Shun Kubo, Ai Matsukane, Yasunori Takahashi, Yoshihiko Imamura, Koichi Hirahata, Hiroki Hase
BACKGROUND: Thallium-201 washout rate of stress myocardial perfusion imaging (MPI) has been reported to correlate with coronary flow reserve which is a parameter of myocardial microcirculation. However, the evidence for its use in diabetic kidney disease (DKD) has been lacking, and the association between thallium-201 washout rate and adverse outcomes including death is unknown. Therefore, the present study was conducted to evaluate the predictive ability of thallium-201 washout rate for mortality in DKD patients initiating hemodialysis...
April 21, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28428471/motion-frozen-imaging-by-gated-myocardial-perfusion-single-photon-emission-computed-tomography-using-multi-focus-fan-beam-collimator-in-thallium-201-study
#11
Kaito Takahashi, Takashi Takeuchi, Yoshiyuki Hosokai, Hayato Odagiri, Haruo Saito
PURPOSE: This study aimed to evaluate the statistical noise of motion-frozen (MF) image generated by gated myocardial perfusion single photon emission computed tomography (SPECT) imaging using IQ · SPECT and to determine the optimal acquisition and reconstruction parameters for MF image using IQ · SPECT. METHODS: A movement cardiac phantom and static cardiac phantom were used to acquire the MF images. The acquisition times used were different in 8 and 16 frames per R-R interval, and varying reconstruction parameters (subset and iteration) were used...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28405882/iq-spect-for-thallium-201-myocardial-perfusion-imaging-effect-of-normal-databases-on-quantification
#12
Takahiro Konishi, Kenichi Nakajima, Koichi Okuda, Hiroto Yoneyama, Shinro Matsuo, Takayuki Shibutani, Masahisa Onoguchi, Seigo Kinuya
OBJECTIVE: Although IQ-single-photon emission computed tomography (SPECT) provides rapid acquisition and attenuation-corrected images, the unique technology may create characteristic distribution different from the conventional imaging. This study aimed to compare the diagnostic performance of IQ-SPECT using Japanese normal databases (NDBs) with that of the conventional SPECT for thallium-201 ((201)Tl) myocardial perfusion imaging (MPI). METHODS: A total of 36 patients underwent 1-day (201)Tl adenosine stress-rest MPI...
April 12, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/28392814/microleakage-evaluation-at-implant-abutment-interface-using-radiotracer-technique
#13
Hakimeh Siadat, Mahnaz Arshad, Hossein-Ali Mahgoli, Babak Fallahi
OBJECTIVES: Microbial leakage through the implant-abutment (I-A) interface results in bacterial colonization in two-piece implants. The aim of this study was to compare microleakage rates in three types of Replace abutments namely Snappy, GoldAdapt, and customized ceramic using radiotracing. MATERIALS AND METHODS: Three groups, one for each abutment type, of five implants and one positive and one negative control were considered (a total of 17 regular body implants)...
June 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28382386/effects-of-hemoglobin-level-on-myocardial-washout-rate-of-thallium-201-in-patients-with-normal-myocardial-perfusion-assessed-by-single-photon-emission-computed-tomography
#14
Satoshi Kurisu, Yoji Sumimoto, Hiroki Ikenaga, Noriaki Watanabe, Ken Ishibashi, Yoshihiro Dohi, Yukihiro Fukuda, Yasuki Kihara
Myocardial perfusion single-photon emission computed tomography (SPECT) is often performed even in patients with suspected coronary artery disease complicated by anemia. We assessed the effects of hemoglobin level on myocardial washout rate of Thallium-201 (Tl-201) in patients with normal myocardial perfusion assessed by SPECT. The study population consisted of 231 patients with summed stress score of zero on SPECT. The mean myocardial washout rate of Tl-201 in the left ventricle was calculated from the stress and the redistribution Bull's eye map...
April 5, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28355586/simultaneous-removal-of-thallium-and-chloride-from-a-highly-saline-industrial-wastewater-using-modified-anion-exchange-resins
#15
Huosheng Li, Yongheng Chen, Jianyou Long, Daqian Jiang, Juan Liu, Sijie Li, Jianying Qi, Ping Zhang, Jin Wang, Jian Gong, Qihang Wu, Diyun Chen
Simultaneous removal of thallium (Tl) and chloride from a highly saline industrial wastewater was investigated using modified anion ion exchange resins. The removal of thallium was mainly driven by the exchange of Tl-chlorocomplex (TlCl4(-)) formed in the oxidation of thallous (Tl (I)) to thallic ion (Tl (III)) by hydrogen peroxide (H2O2) under saline conditions. Over 97% of thallium and chloride removal was achieved using the modified resins, with a wide optimal conditions found to be H2O2 dosage 1.0-25.0mL/L, pH 1...
March 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28353103/the-geochemical-release-feature-of-tl-in-tl-rich-pyrite-mine-wastes-a-long-term-leaching-test
#16
Jinwen Li, Nan Chen, Ivy Rajan, Zhehua Sun, Huiming Wu, Diyun Chen, Lingjun Kong
Identifying and revealing the geochemical behaviour of Tl during mine waste weathering are very important to assess the potential environmental impact of Thallium (Tl) from open mine-waste piles. Herein, two methods including the modified BCR sequential extraction and the long-term humidity cell tests (HCT) were employed to understand the Tl chemical fractions and to stimulate intense chemical weathering process, respectively. The results from BCR sequential extraction showed that the Tl concentration in the studied sample was 18...
May 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28347468/trace-element-status-in-patients-with-type-2-diabetes-in-norway-the-hunt3-survey
#17
Anica Simić, Ailin Falkmo Hansen, Bjørn Olav Åsvold, Pål Richard Romundstad, Kristian Midthjell, Tore Syversen, Trond Peder Flaten
Several epidemiological studies have indicated that a number of trace elements may play a role in type 2 diabetes (T2D). We investigated the association between prevalent T2D and the concentrations of 25 trace elements in whole blood, and the relationships between T2D duration and blood levels of the trace elements that we found to be related to T2D prevalence. In this population based case-control study, 267 patients with self-reported T2D and 609 controls (frequency matched), were selected from the third Nord-Trøndelag Health Survey...
May 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28340386/constructed-ils-coated-porous-magnetic-nickel-cobaltate-hexagonal-nanoplates-sensing-materials-for-the-simultaneous-detection-of-cumulative-toxic-metals
#18
Yuanyuan Dong, Lei Zhang
The different morphologies of magnetic nickel cobaltate (NiCo2O4) electrocatalysts, consisting of nanoparticles (NiCo2O4-N), nanoplates (NiCo2O4-P) and microspheres (NiCo2O4-S) were fabricated. It was found that the electrocatalytic properties of the sensing materials were strongly dependent on morphology and specific surface area. The porous NiCo2O4 hexagonal nanoplates coupled with ILs as modified materials (ILs@NiCo2O4-P) for the simultaneous determination of thallium (Tl(+)), lead (Pb(2+)) and copper (Cu(2+)), exhibited high sensitivity, long-time stability and good repeatability...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28334667/redox-controlled-release-dynamics-of-thallium-in-periodically-flooded-arable-soil
#19
Svetlana Antić-Mladenović, Tina Frohne, Mirjana Kresović, Hans-Joachim Stärk, Dubravka Savić, Vlado Ličina, Jörg Rinklebe
To our knowledge, this is the first work to mechanistically study the impact of the redox potential (EH) and principal factors, such as pH, iron (Fe), manganese (Mn), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), chlorides (Cl(-)) and sulfates (SO4(2-)), on the release dynamics of thallium (Tl) in periodically flooded soil. We simulated flooding using an automated biogeochemical microcosm system that allows for systematical control of pre-defined redox windows. The EH value was increased mechanistically at intervals of approximately 100 mV from reducing (-211 mV) to oxidizing (475 mV) conditions...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28321702/association-between-level-of-urinary-trace-heavy-metals-and-obesity-among-children-aged-6-19%C3%A2-years-nhanes-1999-2011
#20
Wentao Shao, Qian Liu, Xiaowei He, Hui Liu, Aihua Gu, Zhaoyan Jiang
Global prevalence of obesity has been increasing dramatically in all ages. Although traditional causes for obesity development have been studied widely, it is unclear whether environmental exposure of substances such as trace heavy metals affects obesity development among children and adolescents so far. Data from the National Health and Nutrition Examination Survey (1999-2011) were retrieved, and 6602 US children were analyzed in this study. Urinary level of nine trace heavy metals, including barium, cadmium, cobalt, cesium, molybdenum, lead, antimony, thallium, and tungsten, was analyzed for their association with the prevalence of obesity among children aged 6-19 years...
March 21, 2017: Environmental Science and Pollution Research International
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