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Thallium

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https://www.readbyqxmd.com/read/29137733/three-dimensional-organometallic-thallium-i-supramolecular-polymer-nanostructures-synthesized-with-sonochemical-process
#1
Maryam Moeinian, Kamran Akhbari, Jaursup Boonmak, Sujittra Youngme
A new three-dimensional thallium(I) supramolecular polymer, [Tl2(μ2-ATA)]n (1), [H2ATA=2-aminoterephthalic acid], has been synthesized and characterized. The single-crystal X-ray data of compound 1 shows one type of Tl(I) ion with a low coordination number. Compound 1 was self-assembled from Tl⋯C, Tl⋯O and Tl⋯N secondary interactions in thallium(I) coordination and the active lone pair on Tl(I) in this compound may be involved in donor bonding. Two sides of the aromatic ring of ATA(2-) anion have been involved in two types of secondary Tl⋯C approaches...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29091833/fractional-distribution-of-thallium-in-paddy-soil-and-its-bioavailability-to-rice
#2
Xuexia Huang, Ning Li, Qihang Wu, Jianyou Long, Dinggui Luo, Xiaowu Huang, Dongmei Li, Dongye Zhao
To investigate the bioavailability of thallium (Tl) in soil and rice in a Tl-contaminated area in Guangdong, China, the topsoil and rice samples were collected from 24 sampling sites and analyzed. Moreover, a modified sequential extraction procedure was applied to determine the different Tl fractions in the soil. The mean pH value of the soil samples was 4.50. The total Tl concentration in the paddy soil was about 4-8 times higher than the Canadian guideline value (1mgkg(-1)) for agricultural land uses. The mean ecological risk index of Tl was determined to be 483, indicating that potential hazard of the paddy soil was serious...
October 27, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29073826/association-of-qrs-duration-with-left-ventricular-volume-and-ejection-fraction-after-anterior-myocardial-infarction-assessed-by-gated-single-photon-emission-computed-tomography
#3
Satoshi Kurisu, Yoji Sumimoto, Hiroki Ikenaga, Ken Ishibashi, Yukihiro Fukuda, Yasuki Kihara
BACKGROUND: Even intermediate QRS prolongation without bundle branch block is associated with worse clinical outcome after myocardial infarction (MI). We assessed the association of QRS duration with left ventricular (LV) volume and ejection fraction after anterior MI by using quantitative gated single photon emission computed tomography (SPECT). METHODS: Eighty-two patients with prior anterior MI were enrolled. Intermediate QRS prolongation was defined as QRS duration ≥100 ms without bundle branch block...
October 26, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/29071014/chelation-of-thallium-iii-in-rats-using-combined-deferasirox-and-deferiprone-therapy
#4
Samie Salehi, Amir Sh Saljooghi, Somayeh Badiee, Mojtaba Mashmool Moqadam
Thallium and its compounds are a class of highly toxic chemicals that cause wide-ranging symptoms such as gastrointestinal disturbances; polyneuritis; encephalopathy; tachycardia; skin eruptions; hepatic, renal, cardiac, and neurological toxicities; and have mutagenic and genotoxic effects. The present research aimed to evaluate the efficacy of the chelating agents deferasirox (DFX) and deferiprone (L1) in reducing serum and tissue thallium levels after the administration of thallium (III), according to two different dosing regimens, to several groups of Wistar rats for 60 days...
October 2017: Toxicological Research
https://www.readbyqxmd.com/read/29058195/stopped-flow-fluorometric-ion-flux-assay-for-ligand-gated-ion-channel-studies
#5
David J Posson, Radda Rusinova, Olaf S Andersen, Crina M Nimigean
Quantitative investigations into functional properties of purified ion channel proteins using standard electrophysiological methods are challenging, in particular for the determination of average ion channel behavior following rapid changes in experimental conditions (e.g., ligand concentration). Here, we describe a method for determining the functional activity of liposome-reconstituted K(+) channels using a stopped-flow fluorometric ion flux assay. Channel activity is quantified by measuring the rate of fluorescence decrease of a liposome-encapsulated fluorophore, specifically quenched by thallium ions entering the liposomes via open channels...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29058187/thallium-flux-assay-for-measuring-the-activity-of-monovalent-cation-channels-and-transporters
#6
C David Weaver
Monovalent cation channels are critically important for physiological processes ranging from the control of neuronal excitability to the maintenance of solute balance. Mutations in these channels are associated with a multiplicity of diseases and monovalent cation channel-modulating drugs are used as therapeutics. Techniques that allow the measurement of the activity of these ion channels are useful for exploring their many biological roles as well as enabling the discovery and characterization of ion channel modulators for the purposes of drug discovery...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29054627/influence-of-diet-in-urinary-levels-of-metals-in-a-biomonitoring-study-of-a-child-population-of-the-valencian-region-spain
#7
Rosa Pérez, Eva Doménech, Andrea Conchado, Alfredo Sanchez, Clara Coscollà, Vicent Yusà
Pollution by trace elements and its possible effect on organisms has become a worldwide concern due to the increasing presence of trace elements in the environment and especially in the food chain. Exposure to chemicals has traditionally been measured using environmental samples, however, human biomonitoring brings a different perspective, in which all sources and exposure pathways are integrated. The objective of this paper is to discern the possible relationship between children's diet and the metals found in children urine...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29033178/predictors-of-thallium-exposure-and-its-relation-with-preterm-birth
#8
Yangqian Jiang, Wei Xia, Bin Zhang, Xinyun Pan, Wenyu Liu, Shuna Jin, Wenqian Huo, Hongxiu Liu, Yang Peng, Xiaojie Sun, Hongling Zhang, Aifen Zhou, Shunqing Xu, Yuanyuan Li
Thallium (Tl) is a well-recognized hazardous toxic heavy metal that has been reported to have embryotoxicity and fetotoxicity. However, little is known about its association with preterm birth (PTB) in humans. We aimed to evaluate the predictors of Tl exposure and assessed its relation with PTB. The study population included 7173 mother-infant pairs from a birth cohort in Wuhan, China. Predictors of Tl concentrations were explored using linear regression analyses, and associations of Tl exposure with risk of PTB or gestational age at birth were estimated using logistic regression or generalized linear models...
October 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29028380/electrospray-ionization-mass-spectrometric-study-of-thallium-complexes-with-nucleosides
#9
Magdalena Frańska
The complexes between Tl(+), K(+), and nucleosides were studied by using electrospray ionization mass spectrometry. It was found that for complexes of 1:1 stoichiometry, thallium complexes with cytidine were the most abundant and thallium complexes with guanosine were the second most abundant ones. The relative abundances of cytidine-Tl(+) to cytidine-K(+) complexes depended on stoichiometry (at higher stoichiometry the potassium complexes were more abundant). In other words, the relative affinity of Tl(+) and K(+) to form cytidine complexes depends on the stoichiometry of the formed complexes...
October 2017: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/29022181/occurrence-of-selected-elements-ti-sr-ba-v-ga-sn-tl-and-sb-in-deposited-dust-and-human-hair-samples-implications-for-human-health-in-pakistan
#10
Syed Ali Musstjab Akber Shah Eqani, Zafar Iqbal Tanveer, Chi Qiaoqiao, Alessandra Cincinelli, Zafeer Saqib, Sikandar I Mulla, Nadeem Ali, Ioannis A Katsoyiannis, Mustafa Nawaz Shafqat, Heqing Shen
The current study determined, for the first time, the levels of titanium (Ti), strontium (Sr), barium (Ba), vanadium (V), gallium (Ga), tin (Sn), thallium (Tl), and antinomy (Sb), in deposited dust, and human hair collected from general population of different geographical areas of Pakistan. All the samples were prepared by microwave digestion and measured by ICP-MS. The results showed that on deposited dust samples, the detected elements followed the descending trend as: Ti > Sr > Ba > V > Ga > Sn > Tl > Sb similar to the upper continental crust...
October 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28990944/the-opinion-of-turkish-cardiologists-on-current-malpractice-system-and-an-alternative-patient-compensation-system-proposal-pcs-study-group
#11
Ayhan Olcay, Sadık Volkan Emren, Gamze Babür Güler, Ekrem Güler, Vedat Ertunç, Rida Berilgen, Abdullah Aslan, Ersin Çağrı Şimşek, Şükriye Ebru Gölcük, Kıvanç Yalın
OBJECTIVE: Cardiologists participate in the diagnosis and interventional treatment of numerous high-risk patients. The goal of this study was to investigate how the current malpractice system in Turkey influences cardiologists' diagnostic and interventional behavior and to obtain their opinions about an alternative patient compensation system. METHODS: The present cross-sectional study assessed the practice of defensive medicine among cardiologists who are actively working in various types of workplace within the Turkish healthcare system...
October 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28980632/printable-organometallic-perovskite-enables-large-area-low-dose-x-ray-imaging
#12
Yong Churl Kim, Kwang Hee Kim, Dae-Yong Son, Dong-Nyuk Jeong, Ja-Young Seo, Yeong Suk Choi, In Taek Han, Sang Yoon Lee, Nam-Gyu Park
Medical X-ray imaging procedures require digital flat detectors operating at low doses to reduce radiation health risks. Solution-processed organic-inorganic hybrid perovskites have characteristics that make them good candidates for the photoconductive layer of such sensitive detectors. However, such detectors have not yet been built on thin-film transistor arrays because it has been difficult to prepare thick perovskite films (more than a few hundred micrometres) over large areas (a detector is typically 50 centimetres by 50 centimetres)...
October 4, 2017: Nature
https://www.readbyqxmd.com/read/28970882/colloidal-thallium-halide-nanocrystals-with-reasonable-luminescence-carrier-mobility-and-diffusion-length
#13
Wasim J Mir, Avinash Warankar, Ashutosh Acharya, Shyamashis Das, Pankaj Mandal, Angshuman Nag
Colloidal lead halide based perovskite nanocrystals (NCs) have been recently established as an interesting class of defect-tolerant NCs with potential for superior optoelectronic applications. The electronic band structure of thallium halides (TlX, where X = Br and I) show a strong resemblance to lead halide perovskites, where both Pb(2+) and Tl(+) exhibit a 6s(2) inert pair of electrons and strong spin-orbit coupling. Although the crystal structure of TlX is not perovskite, the similarities of its electronic structure with lead halide perovskites motivated us to prepare colloidal TlX NCs...
June 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28947985/survey-of-urinary-nickel-in-peritoneal-dialysis-patients
#14
Ya-Ching Huang, Hsiao-Chen Ning, Shang-Syuan Chen, Chia-Ni Lin, I-Kwan Wang, Shu-Man Weng, Cheng-Hao Weng, Ching-Wei Hsu, Wen-Hung Huang, Jang-Jih Lu, Tsu-Lan Wu, Tzung-Hai Yen
This study surveyed urinary nickel concentrations in peritoneal dialysis (PD) patients, and analyzed the association of urinary nickel concentrations with clinical outcomes and inflammatory biomarkers. In total, 50 PD patients and 50 healthy controls were recruited for this study. All participants were examined for the presence of toxic trace elements (antimony, arsenic, bismuth, cadmium, copper, manganese, mercury, nickel, lead, tellurium, thallium and zinc) in their urine by using inductively coupled plasma mass spectrometry (ICP-MS)...
September 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28946464/preparation-of-thallium-nanomaterials-from-thallium-i-coordination-polymers-precursors-synthesized-by-green-sonochemical-and-mechanochemical-processes
#15
Farid Mohaghegh, Kamran Akhbari, Anukorn Phuruangrat
Microstructures of [Tl2(μ2-ATA)]n (1), [HATA=2-aminoterephthalic acid], supramolecular polymer was synthesized by sonochemical process (1S) and used as new precursor for preparation pure phase of thallium(III) oxide microstructures. [Tl(μ2-dcpa)]n (2), [Hdcpa=2,4-dichlorophenoxyacetic acid], is another supramolecular polymer which was synthesized by green sonochemical (2S) and mechanochemical (2M) processes. These two samples of 2 were also used for preparation of thallium nanomaterials. Both processes on 2 were successful but mixture of Tl, Tl2O3 and TlCl nanostructures with various morphologies from 2S and mixture of Tl2O3 and TlCl nanoparticles from 2M were obtained...
January 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28941840/thallium-isotopes-in-metallurgical-wastes-contaminated-soils-a-novel-tool-to-trace-metal-source-and-behavior
#16
Aleš Vaněk, Zuzana Grösslová, Martin Mihaljevič, Vojtěch Ettler, Jakub Trubač, Vladislav Chrastný, Vít Penížek, Leslaw Teper, Jerzy Cabala, Andreas Voegelin, Tereza Zádorová, Vendula Oborná, Ondřej Drábek, Ondřej Holubík, Jakub Houška, Lenka Pavlů, Christopher Ash
Thallium (Tl) concentration and isotope data have been recorded for contaminated soils and a set of industrial wastes that were produced within different stages of Zn ore mining and metallurgical processing of Zn-rich materials. Despite large differences in Tl levels of the waste materials (1-500mgkg(-1)), generally small changes in ε(205)Tl values have been observed. However, isotopically lighter Tl was recorded in fly ash (ε(205)Tl∼-4.1) than in slag (ε(205)Tl∼-3.3), implying partial isotope fractionation during material processing...
September 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28939125/toxic-elements-and-associations-with-hematology-plasma-biochemistry-and-protein-electrophoresis-in-nesting-loggerhead-sea-turtles-caretta-caretta-from-casey-key-florida
#17
Justin R Perrault, Nicole I Stacy, Andreas F Lehner, Savannah K Poor, John P Buchweitz, Catherine J Walsh
Toxic elements (arsenic, cadmium, lead, mercury, selenium, thallium) are a group of contaminants that are known to elicit developmental, reproductive, general health, and immune system effects in reptiles, even at low concentrations. Reptiles, including marine turtles, are susceptible to accumulation of toxic elements due to their long life span, low metabolic rate, and highly efficient conversion of prey into biomass. The objectives of this study were to (1) document concentrations of arsenic, cadmium, lead, mercury, selenium, and thallium in whole blood and keratin from nesting loggerhead sea turtles (Caretta caretta) from Casey Key, Florida and document correlations thereof and (2) correlate whole blood toxic element concentrations to various hematological and plasma biochemistry analytes...
December 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28928986/cholinergic-potentiation-of-restoration-of-visual-function-after-optic-nerve-damage-in-rats
#18
Mira Chamoun, Elena G Sergeeva, Petra Henrich-Noack, Shaobo Jia, Lisa Grigartzik, Jing Ma, Qing You, Frédéric Huppé-Gourgues, Bernhard A Sabel, Elvire Vaucher
Enhancing cortical plasticity and brain connectivity may improve residual vision following a visual impairment. Since acetylcholine plays an important role in attention and neuronal plasticity, we explored whether potentiation of the cholinergic transmission has an effect on the visual function restoration. To this end, we evaluated for 4 weeks the effect of the acetylcholinesterase inhibitor donepezil on brightness discrimination, visually evoked potentials, and visual cortex reactivity after a bilateral and partial optic nerve crush in adult rats...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28918289/effective-removal-of-trace-thallium-from-surface-water-by-nanosized-manganese-dioxide-enhanced-quartz-sand-filtration
#19
Xiaoliu Huangfu, Chengxue Ma, Jun Ma, Qiang He, Chun Yang, Jian Zhou, Jin Jiang, Yaan Wang
Thallium (Tl) has drawn wide concern due to its high toxicity even at extremely low concentrations, as well as its tendency for significant accumulation in the human body and other organisms. The need to develop effective strategies for trace Tl removal from drinking water is urgent. In this study, the removal of trace Tl (0.5 μg L(-1)) by conventional quartz sand filtration enhanced by nanosized manganese dioxide (nMnO2) has been investigated using typical surface water obtained from northeast China. The results indicate that nMnO2 enhanced quartz sand filtration could remove trace Tl(I) and Tl(III) efficiently through the adsorption of Tl onto nMnO2 added to a water matrix and onto nMnO2 attached on quartz sand surfaces...
September 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28913548/changes-in-histopathology-enzyme-activities-and-the-expression-of-relevant-genes-in-zebrafish-danio-rerio-following-long-term-exposure-to-environmental-levels-of-thallium
#20
Li-Ping Hou, Yang Yang, Hu Shu, Guang-Guo Ying, Jian-Liang Zhao, Yi-Bing Chen, Yong-Heng Chen, Gui-Zhen Fang, Xin Li, Ji-Sheng Liu
Thallium is a rare-earth element, but widely distributed in water environments, posing a potential risk to our health. This study was designed to investigate the chronic effects of thallium based on physiological responses, gene expression, and changes in the activity of relevant enzymes in adult zebra fish exposed to thallium at low doses. The endpoints assessed include mRNA expression of metallothionein (MT)2 and heat shock protein HSP70; enzymatic activities of superoxide dismutase (SOD) and Na(+)/K(+)-ATPase; and the histopathology of gill, gonad, and liver tissues...
September 14, 2017: Bulletin of Environmental Contamination and Toxicology
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