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Thallium

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https://www.readbyqxmd.com/read/29755963/environmental-toxin-screening-using-human-derived-3d-bioengineered-liver-and-cardiac-organoids
#1
Steven D Forsythe, Mahesh Devarasetty, Thomas Shupe, Colin Bishop, Anthony Atala, Shay Soker, Aleksander Skardal
Introduction: Environmental toxins, such as lead and other heavy metals, pesticides, and other compounds, represent a significant health concern within the USA and around the world. Even in the twenty-first century, a plethora of cities and towns in the U.S. have suffered from exposures to lead in drinking water or other heavy metals in food or the earth, while there is a high possibility of further places to suffer such exposures in the near future. Methods: We employed bioengineered 3D human liver and cardiac organoids to screen a panel of environmental toxins (lead, mercury, thallium, and glyphosate), and charted the response of the organoids to these compounds...
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29744924/developing-and-applying-control-charts-to-detect-change-water-chemistry-parameters-measured-in-the-athabasca-river-near-the-oil-sands-a-tool-for-surveillance-monitoring
#2
Tim J Arciszewski, Rod R Hazewinkel, Kelly R Munkittrick, Bruce W Kilgour
Control charting is a simple technique to identify change and is well-suited for use in water quality programs. Control charts accounting for co-variation associated with discharge and time were used to explore example and representative variables routinely measured in the Athabasca River near the oil sands area for indications of change, including 5 major ions (chloride, sodium, sulphate, calcium, magnesium), 5 total metals (aluminum, iron, thallium, molybdenum, vanadium) and total suspended solids (TSS). Regression equations developed from reference data (1988-2009) were used to predict observations and calculate residuals from later test observations (2010-2016)...
May 10, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29726407/development-of-tlbr-detectors-for-pet-imaging
#3
Gerard Ariño-Estrada, Junwei Du, Hadong Kim, Leonard J Cirignano, Kanai S Shah, Simon R Cherry, Gregory S Mitchell
Thallium bromide (TlBr) is a promising semiconductor detector material for positron emission tomography (PET) because it can offer very good energy resolution and 3-D segmentation capabilities, and it also provides detection efficiency surpassing that of commonly used scintillators. Energy, timing, and spatial resolution were measured for thin (<1 mm) TlBr detectors. The energy and timing resolution were measured simultaneously for the same planar 0.87 mm-thick TlBr device. An energy resolution of (6...
May 4, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29713552/persistent-hiccups-as-the-only-presenting-symptom-of-st-elevation-myocardial-infarction
#4
Nasreen Shaikh, Rishi Raj, Srinivas Movva, Charles Mattina
Clinical manifestations of acute myocardial infarction can be more than just chest pain. Patients can present with dyspnea, fatigue, heart burn, diaphoresis, syncope, and abdominal pain to name a few. Our patient was a 74-year-old male with a past medical history of type 2 diabetes mellitus, hypertension, hyperlipidemia, and COPD due to chronic tobacco use, who presented with persistent hiccups for 4 days and no other complaints. Coincidently, he was found to have a diabetic foot ulcer with sepsis and acute kidney injury and hence was admitted to the hospital...
2018: Case Reports in Cardiology
https://www.readbyqxmd.com/read/29706422/design-synthesis-and-evaluation-of-substituted-piperidine-based-kcnq-openers-as-novel-antiepileptic-agents
#5
Shaoning Yang, Dingqiang Lu, Pingkai Ouyang
Epilepsy is a kind of disease with complicated pathogenesis. KCNQ (Kv7) is a voltage dependent potassium channel that is mostly associated with epilepsy and thus becomes an important target in the treatment of epilepsy. In this paper, a series of substituted piperidine derivatives targeting KCNQ were designed and synthesized by using scaffold hopping and active substructure hybridization. Compounds were evaluated by fluorescence-based thallium influx assay, Rb+ flow assay and electrophysiological patch-clamp assay...
April 17, 2018: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29687196/distribution-fractions-and-potential-release-of-thallium-in-acidic-soils-nearby-a-waste-copper-mining-site-from-southern-china
#6
Jianhua Guo, Yinglan Cao, Zhuanxi Luo, Hongda Fang, Zhenfang Chen, Dapeng Wang, Feifei Xu, Changzhou Yan
Although thallium (Tl) is a highly toxic element, little information is available on the environmental risks of Tl in agricultural soils with intensive practices, particularly nearby mining sites. Therefore, we investigated the potential release of Tl in acidic soils with intensive cultivation nearby a waste copper mining site from southern China based on its level and chemical fractions as well as simulated release under artificial acid rain. Results showed that the average Tl content was 1.31 mg/kg in the studied area, which significantly exceeds the permissible thallium value of 1 mg/kg for agricultural soil in China...
April 23, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29683928/effects-of-atrial-fibrillation-on-myocardial-washout-rate-of-thallium-201-on-myocardial-perfusion-single-photon-emission-computed-tomography
#7
Satoshi Kurisu, Kazuhiro Nitta, Yoji Sumimoto, Hiroki Ikenaga, Ken Ishibashi, Yukihiro Fukuda, Yasuki Kihara
BACKGROUND: Myocardial perfusion single-photon emission computed tomography (SPECT) with thallium (Tl)-201 is an established modality for evaluating myocardial ischemia. We assessed the effects of atrial fibrillation (AF) on the myocardial washout rate (WR) of Tl-201 on myocardial perfusion SPECT. PATIENTS AND METHODS: A total of 231 patients with no evidence of myocardial ischemia were enrolled retrospectively in this study. Patients were divided into two groups on the basis of the ECG at the time of myocardial perfusion SPECT...
April 20, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29674239/relationship-between-domestic-smoking-and-metals-and-rare-earth-elements-concentration-in-indoor-pm-2-5
#8
Gaspare Drago, Cinzia Perrino, Silvia Canepari, Silvia Ruggieri, Luca L'Abbate, Valeria Longo, Paolo Colombo, Daniele Frasca, Martin Balzan, Giuseppina Cuttitta, Gianluca Scaccianoce, Giuseppe Piva, Salvatore Bucchieri, Mario Melis, Giovanni Viegi, Fabio Cibella, Martin Balzan, David Bilocca, Charles Borg, Stephen Montefort, Christopher Zammit, Salvatore Bucchieri, Fabio Cibella, Paolo Colombo, Giuseppina Cuttitta, Gaspare Drago, Giuliana Ferrante, Luca L'Abbate, Stefania La Grutta, Valeria Longo, Mario R Melis, Silvia Ruggieri, Giovanni Viegi, Remo Minardi, Giuseppe Piva, Rosaria Ristagno, Gianfranco Rizzo, Gianluca Scaccianoce
Cigarette smoke is the main source of indoor chemical and toxic elements. Cadmium (Cd), Thallium (Tl), Lead (Pb) and Antimony (Sb) are important contributors to smoke-related health risks. Data on the association between Rare Earth Elements (REE) Cerium (Ce) and Lanthanum (La) and domestic smoking are scanty. To evaluate the relationship between cigarette smoke, indoor levels of PM2.5 and heavy metals, 73 children were investigated by parental questionnaire and skin prick tests. The houses of residence of 41 "cases" and 32 "controls" (children with and without respiratory symptoms, respectively) were evaluated by 48-h PM2...
April 16, 2018: Environmental Research
https://www.readbyqxmd.com/read/29667997/inductive-modulation-of-tris-phosphinomethyl-phenylborate-donation-at-group-vi-metals-via-borate-phenyl-substituent-modification
#9
Paul J Fischer, Shuruthi Senthil, Jeremy T Stephan, McKinley L Swift, Meghan D Storlie, Emily T Chan, Matthew V Vollmer, Victor G Young
A series of zerovalent group VI metal complexes of tris(diisopropylphosphinomethyl)phenylborate ([PhB(CH2PiPr2)3]-, PhBPiPr3), including [PPN][M(CO)3(PhBPiPr3)] (M = Cr, Mo, W) and the first bimetallics in which PhBPiPr3 serves as a bridging ligand via binding M(CO)3 units at the three phosphorus atoms and the borate phenyl substituent, have been synthesized and fully characterized. Two new tris(phosphinomethyl)borates featuring 3,5-dimethylphenyl and 3,5-bis(trifluoromethyl)phenyl borate substituents were prepared as crystallographically characterized thallium salts, and metallated giving their inaugural transition metal complexes [PPN][M(CO)3(((3,5-Me)C6H3)BPPh3)] and [PPN][M(CO)3(((3,5-CF3)C6H3)BPPh3)]...
April 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29656251/thallium-contamination-of-desert-soil-in-namibia-chemical-mineralogical-and-isotopic-insights
#10
Zuzana Grösslová, Aleš Vaněk, Vendula Oborná, Martin Mihaljevič, Vojtěch Ettler, Jakub Trubač, Petr Drahota, Vít Penížek, Lenka Pavlů, Ondra Sracek, Bohdan Kříbek, Andreas Voegelin, Jörg Göttlicher, Ondřej Drábek, Václav Tejnecký, Jakub Houška, Benjamin Mapani, Tereza Zádorová
We studied arid desert soils from Namibia (Rosh Pinah) that were contaminated with up to 7 mg kg-1 of thallium (Tl) via dust emitted from a local flotation tailing dam. Chemical extractions of waste and soil materials indicated that most of the Tl is strongly bound, in accordance with X-ray diffraction and X-ray absorption spectroscopy data that point to the predominant association of Tl with metal sulfides and phyllosilicates. The isotope fractionation factor ε205 Tl of the soil samples (from -0.4 to +3...
April 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29652875/evaluation-of-recurrence-of-musculoskeletal-tumors-with-thallium-201-scintigraphy-plus-spect-ct-in-pediatric-population
#11
Sevastián S Medina-Ornelas, Herlinda Vera-Hermosillo, Rafael Delgado-Espín, Francisco O García-Pérez
Background: Imaging studies, particularly simple and contrast-enhanced tomography, constitute the first diagnostic approach to detect recurrence of musculoskeletal tumors. The aim of the present retrospective study was to demonstrate the usefulness of scintigraphy plus SPECT/CT (single photon emission computed tomography) with thallium-201 (201 Tl) in the evaluation of malignant musculoskeletal tumors with suspicion of recurrence or metastatic disease. Methods: Eight weeks after the last therapy, 72 scintigraphy and SPECT/CT studies were performed to assess regional recurrence and metastatic disease in 42 patients with different types of malignant musculoskeletal tumors, such as osteosarcoma, Ewing's sarcoma, rhabdomyosarcoma, retinoblastoma, synovial sarcoma, and Wilms tumor at the Hospital Infantil de México Federico Gómez...
2018: Boletín Médico del Hospital Infantil de México
https://www.readbyqxmd.com/read/29614766/electrode-modified-by-reduced-graphene-oxide-for-monitoring-of-total-thallium-in-grain-products
#12
Bozena Karbowska, Tomasz Rębiś, Grzegorz Milczarek
Grain products and the associated industry have a notable economic and social impact all over the world. The toxicological safety of grain products is a nutritional prerogative. This study focused on the determination of thallium content in grain product samples collected from a commercial brand commonly available in Poland. The samples were analyzed with the use of differential pulse anodic stripping voltammetry (DPASV) with graphene oxide based on glassy carbon. The stripping anodic peak current of thallium was linear over its concentration range from 9...
April 1, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29604980/imaging-studies-of-the-hiv-infected-brain
#13
Linda Chang, Dinesh K Shukla
Human immunodeficiency virus (HIV) enters the brain early after infecting humans and may remain in the central nervous system despite successful antiretroviral treatment. Many neuroimaging techniques were used to study HIV+ patients with or without opportunistic infections. These techniques assessed abnormalities in brain structures (using computed tomography, structural magnetic resonance imaging (MRI), diffusion MRI) and function (using functional MRI at rest or during a task, and perfusion MRI with or without a contrast agent)...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29604975/primary-cns-lymphoma-in-hiv-infection
#14
Dieta Brandsma, Jacoline E C Bromberg
Primary CNS lymphoma (PCNSL) has been designated an acquired immune deficiency syndrome (AIDS)-defining disease since 1983 and accounts for up to 15% of non-Hodgkin lymphomas in human immunodeficiency virus (HIV) patients. The majority of HIV patients are Epstein-Barr virus (EBV)-related. The most likely etiology is ineffective immunoregulation of EBV, inducing oncogenic protein expression, and subsequent loss of apoptosis and increased proliferation of lymphocytes. PCNSL generally presents with supratentorial, single or multiple, contrast-enhancing lesions...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29603447/chemically-tunable-formation-of-different-discrete-oligomeric-and-polymeric-self-assembly-structures-from-a-di-gold-metallo-tweezer
#15
Eduardo Victor Peris, Susana Ibáñez
We describe a new di-gold metallo-tweezer whose complex supramolecular landscape is controlled by adding a series of metal cations. This metallo-tweezer has a strong tendency to form interesting supramolecular structures upon addition of Tl+, Ag+ and Cu+. The choice of the cation is used to directing the formation of the designated molecular architecture. The addition of thallium facilitates the formation of a self-aggregated duplex structure, with the cation occupying the cavity of the dimer. The same type of structure is formed when Cu+ is added, and the resulting duplex inclusion complex displays interesting vapochromism properties...
March 30, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29561994/current-practices-in-myocardial-perfusion-scintigraphy-in-brazil-and-adherence-to-the-iaea-recommendations-results-of-a-cross-sectional-study
#16
Carlos Vitor Braga Rodrigues, Anderson Oliveira, Christiane Cigagna Wiefels, Maurício de Souza Leão, Cláudio Tinoco Mesquita
BACKGROUND: Data on the current situation of nuclear medicine practices in cardiology in Brazil are scarce. The International Atomic Energy Agency (IAEA) has recommended eight "good practices" to minimize patients' ionizing radiation exposure during myocardial perfusion scintigraphy (MPS). OBJECTIVES: To assess the adoption of the eight good practices in MPS in Brazil. METHODS: Cross-sectional study with data obtained by use of a questionnaire...
February 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29520004/mechanical-dyssynchrony-and-diastolic-dysfunction-are-common-in-lvh-a-pilot-correlation-study-using-doppler-echocardiography-and-czt-gated-spect-mpi
#17
Szu-Ying Tsai, Shan-Ying Wang, Yu-Chien Shiau, Yen-Wen Wu
Hypertrophic cardiomyopathy (HCM) is an often under-diagnosed cause of left ventricular hypertrophy (LVH). It affects 1/500 of the population, is the most commonly inherited cardiovascular disorder, and can present in apical, concentric, or septal forms. Although most patients are asymptomatic, sudden cardiac death can be the initial presentation of HCM. By retrospectively enrolling patients suspected of having three different types of HCM in the absence of epicardial coronary stenosis, we aimed to examine systolic and diastolic dysfunction and perfusion abnormalities using both Doppler echocardiography and state-of-the-art gated single-photon emission computerized tomography (SPECT) myocardial perfusion imaging (MPI) with a cadmium-zinc-telluride camera and thallium-201...
March 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29484543/improved-diagnostic-accuracy-of-thallium-201-myocardial-perfusion-single-photon-emission-computed-tomography-with-ct-attenuation-correction
#18
Jei-Yie Huang, Ruoh-Fang Yen, Wen-Chung Lee, Chun-Kai Huang, Pei-Ying Hsu, Mei-Fang Cheng, Ching-Chu Lu, Yen-Hung Lin, Kuo-Liong Chien, Yen-Wen Wu
BACKGROUND: The benefits of attenuation correction (AC) in technetium-99m myocardial perfusion imaging (MPI) have been well established. However, the value of thallium (Tl-201) AC and routine computed tomography AC (CTAC) were less well established. The aims of this study were to evaluate the diagnostic performance of thallium (Tl-201) MPI with additional CTAC and to determine which participants would benefit most. METHODS AND RESULTS: A total of 108 consecutive patients who underwent Tl-201 MPI and received coronary angiography within 3 months were enrolled...
February 26, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29482021/fractionation-and-mobility-of-thallium-in-areas-impacted-by-mining-metallurgical-activities-identification-of-a-water-soluble-tl-i-fraction
#19
Yusniel Cruz-Hernández, Mismel Ruiz-García, Mario Villalobos, Francisco Martin Romero, Diana Meza-Figueroa, Fernando Garrido, Elizabeth Hernández-Alvarez, Teresa Pi-Puig
Mining and metallurgy generate residues that may contain thallium (Tl), a highly toxic metal, for which it is currently not feasible to determine its geochemical speciation through X-ray absorption spectroscopy due to a combination of very low contents and the interference of accompanying high arsenic contents. Therefore, fractionation studies in residues and soils are required to analyze the mobility and bioavailability of this metal, which in turn provide information to infer its speciation. For this purpose, in this work a modification of the BCR procedure was applied to residues and contaminated soils from three mining zones of Mexico and two mining zones of Spain, spanning samples with acidic to alkaline pH values...
June 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29477112/microcolumn-based-speciation-analysis-of-thallium-in-soil-and-green-cabbage
#20
Yanlong Jia, Tangfu Xiao, Jialong Sun, Fei Yang, Philippe C Baveye
Thallium (Tl) is a toxic trace metal, whose geochemical behavior and biological effects are closely controlled by its chemical speciation in the environment. However, little tends to be known about this speciation of Tl in soil and plant systems that directly affect the safety of food supplies. In this context, the objective of the present study was to elaborate an efficient method to separate and detect Tl(I) and Tl(III) species for soil and plant samples. This method involves the selective adsorption of Tl(I) on microcolumns filled with immobilized oxine, in the presence of DTPA (diethylenetriaminepentaacetic acid), followed by DTPA-enhanced ultrasonic and heating-induced extraction, coupled with ICP-MS detection...
July 15, 2018: Science of the Total Environment
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