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Franchi S, Madabeni A, Tosato M, Gentile S, Asti M, Orian L, Di Marco V. Navigating through the coordination preferences of heavy alkaline earth metals: Laying the foundations for 223Ra- and 131/135mBa-based targeted alpha therapy and theranostics of cancer. J Inorg Biochem 2024; 256:112569. [PMID: 38701687 DOI: 10.1016/j.jinorgbio.2024.112569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/04/2024] [Accepted: 04/18/2024] [Indexed: 05/05/2024]
Abstract
The clinical success of [223Ra]RaCl2 (Xofigo®) for the palliative treatment of bone metastases in patients with prostate cancer has highlighted the therapeutic potential of α-particle emission. Expanding the applicability of radium-223 in Targeted Alpha Therapy of non-osseous tumors is followed up with significant interest, as it holds the potential to unveil novel treatment options in the comprehensive management of cancer. Moreover, the use of barium radionuclides, like barium-131 and -135m, is still unfamiliar in nuclear medicine applications, although they can be considered as radium-223 surrogates for imaging purposes. Enabling these applications requires the establishment of chelators able to form stable complexes with radium and barium radionuclides. Until now, only a limited number of ligands have been suggested and these molecules have been primarily inspired by existing structures known for their ability to complex large metal cations. However, a systematic inspection of chelators specifically tailored to Ra2+ and Ba2+ has yet to be conducted. This work delves into a comprehensive investigation of a series of small organic ligands, aiming to unveil the coordination preferences of both radium-223 and barium-131/135m. Electronic binding energies of both metal cations to each ligand were theoretically computed via Density Functional Theory calculations (COSMO-ZORA-PBE-D3/TZ2P), while thermodynamic stability constants were experimentally determined for Ba2+-ligand complexes by potentiometry, NMR and UV-Vis spectroscopies. The outcomes revealed malonate, 2-hydroxypyridine 1-oxide and picolinate as the most favorable building blocks to design multidentate chelators. These findings serve as foundation guidelines, propelling the development of cutting-edge radium-223- and barium-131/135m-based radiopharmaceuticals for Targeted Alpha Therapy and theranostics of cancer.
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Affiliation(s)
- Sara Franchi
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
| | - Andrea Madabeni
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
| | - Marianna Tosato
- Radiopharmaceutical Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS Reggio Emilia, 42122 Reggio Emilia, Italy.
| | - Silvia Gentile
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
| | - Mattia Asti
- Radiopharmaceutical Chemistry Section, Nuclear Medicine Unit, AUSL-IRCCS Reggio Emilia, 42122 Reggio Emilia, Italy.
| | - Laura Orian
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy; National Institute of Nuclear Physics, National Laboratories of Legnaro (INFN-LNL), 35020 Legnaro, Padova, Italy.
| | - Valerio Di Marco
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy.
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Madhanagopal BR, Rodriguez A, Cordones M, Chandrasekaran AR. Barium Concentration-Dependent Anomalous Electrophoresis of Synthetic DNA Motifs. ACS Appl Bio Mater 2024; 7:2704-2709. [PMID: 38635922 DOI: 10.1021/acsabm.4c00274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
The structural integrity, assembly yield, and biostability of DNA nanostructures are influenced by the metal ions used to construct them. Although high (>10 mM) concentrations of divalent ions are often preferred for assembling DNA nanostructures, the range of ion concentrations and the composition of the assembly products vary for different assembly conditions. Here, we examined the unique ability of Ba2+ to retard double crossover DNA motifs by forming a low mobility species, whose mobility on the gel is determined by the concentration ratio of DNA and Ba2+. The formation of this electrophoretically retarded species is promoted by divalent ions such as Mg2+, Ca2+, and Sr2+ when combined with Ba2+ but not on their own, while monovalent ions such as Na+, K+, and Li+ do not have any effect on this phenomenon. Our results highlight the complex interplay between the metal ions and DNA self-assembly and could inform the design of DNA nanostructures for applications that expose them to multiple ions at high concentrations.
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Affiliation(s)
- Bharath Raj Madhanagopal
- The RNA Institute, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Arlin Rodriguez
- The RNA Institute, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Mireylin Cordones
- The RNA Institute, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Arun Richard Chandrasekaran
- The RNA Institute, University at Albany, State University of New York, Albany, New York 12222, United States
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Karpov TE, Darwish A, Mitusova K, Postovalova AS, Akhmetova DR, Vlasova OL, Shipilovskikh SA, Timin AS. Controllable synthesis of barium carbonate nano- and microparticles for SPECT and CT imaging. J Mater Chem B 2024; 12:4232-4247. [PMID: 38601990 DOI: 10.1039/d3tb02480f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The design and synthesis of nano- and microcarriers for preclinical and clinical imaging are highly attractive due to their unique features, for example, multimodal properties. However, broad translation of these carriers into clinical practice is postponed due to the unknown biological reactivity of the new components used for their synthesis. Here, we have developed microcarriers (∼2-3 μm) and nanocarriers (<200 nm) made of barium carbonate (BaCO3) for multiple imaging applications in vivo. In general, barium in the developed carriers can be used for X-ray computed tomography, and the introduction of a diagnostic isotope (99mTc) into the BaCO3 structure enables in vivo visualization using single-photon emission computed tomography. The bioimaging has shown that the radiolabeled BaCO3 nano- and microcarriers had different biodistribution profiles and tumor accumulation efficiencies after intratumoral and intravenous injections. In particular, in the case of intratumoral injection, all the types of used carriers mostly remained in the tumors (>97%). For intravenous injection, BaCO3 microcarriers were mainly localized in the lung tissues. However, BaCO3 NPs were mainly accumulated in the liver. These results were supported by ex vivo fluorescence imaging, direct radiometry, and histological analysis. The BaCO3-based micro- and nanocarriers showed negligible in vivo toxicity towards major organs such as the heart, lungs, liver, kidneys, and spleen. This study provides a simple strategy for the design and fabrication of the BaCO3-based carriers for the development of dual bioimaging.
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Affiliation(s)
- Timofey E Karpov
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
- Granov Russian Research Center of Radiology & Surgical Technologies, Leningradskaya Street 70 Pesochny, St. Petersburg 197758, Russian Federation
| | - Aya Darwish
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
| | - Ksenia Mitusova
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
| | - Alisa S Postovalova
- Granov Russian Research Center of Radiology & Surgical Technologies, Leningradskaya Street 70 Pesochny, St. Petersburg 197758, Russian Federation
- ITMO University, Lomonosova 9, St. Petersburg 191002, Russian Federation
| | - Darya R Akhmetova
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
- ITMO University, Lomonosova 9, St. Petersburg 191002, Russian Federation
| | - Olga L Vlasova
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
| | | | - Alexander S Timin
- Peter The Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, St. Petersburg 195251, Russian Federation.
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Rybczyńska M, Sikorski A. Structural insight and in silico prediction of the pharmacokinetic parameters and toxicity of alkaline earth metal compounds strontium and barium with the non-steroidal anti-inflammatory drug nimesulide. Dalton Trans 2024; 53:6501-6506. [PMID: 38511607 DOI: 10.1039/d4dt00446a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
In the crystals of alkaline earth metal compounds strontium and barium with the non-steroidal anti-inflammatory drug nimesulide, the strontium cation is nine-coordinated with a distorted tricapped trigonal prismatic geometry TCTPR-9, whereas the ten-coordinated barium ion exhibits a distorted tetracapped trigonal prismatic geometry TCTPR-10.
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Affiliation(s)
| | - Artur Sikorski
- Faculty of Chemistry, University of Gdansk, W. Stwosza 63, 80-308 Gdansk, Poland.
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SanaUllah I, Khan S, Ali D, Sajjad A, Shamaila S, Kanwal Z, Sabri AN, Atiq S, Naseem S, Riaz S. Investigation and optimization of In-Vitro behaviour of Perovskite barium titanate as a scaffold and protective coatings. J Mech Behav Biomed Mater 2024; 149:106215. [PMID: 37984284 DOI: 10.1016/j.jmbbm.2023.106215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 11/22/2023]
Abstract
The piezoelectric effect is widely known to have a significant physiological function in bone development, remodeling, and fracture repair. As a well-known piezoelectric material, barium titanate is particularly appealing as a scaffold layer to improve bone tissue engineering applications. Currently, the chemical bath deposition method is used to prepare green synthesized barium titanate coatings to improve mechanical and biological characteristics. Molarity of the solutions, an essential parameter in chemical synthesis, is changed at room temperature (0.1-1.2 Molar) to prepare coatings. The XRD spectra for as deposited coatings indicate amorphous behavior, while polycrystalline nature of coatings is observed after annealing (300 °C). Coatings prepared with solutions of relatively low molarities, i.e. from 0.1 to 0.8 M, exhibit mixed tetragonal - cubic phases. However, the tetragonal phase of Perovskite barium titanate is observed using solution molarities of 1.0 M and 1.2 M. Relatively high value of transmission, i.e. ∼80%, is observed for the coatings prepared with high molarities. Band gap of annealed coatings varies between 3.47 and 3.70 eV. For 1.2 M sample, the maximum spontaneous polarization (Ps) is 0.327x10-3 (μC/cm2) and the residual polarization (Pr) is 0.072x10-3 (μC/cm2). For 1.2M solution, a high hardness value (1510 HV) is recorded, with a fracture toughness of 28.80 MPam-1/2. Low values of weight loss, after dipping the coatings in simulated body fluid, is observed. The antibacterial activity of BaTiO3 is tested against E. coli and Bacillus subtilis. Drug encapsulation capability is also tested for different time intervals. As a result, CBD-based coatings are a promising nominee for use as scaffold and protective coatings.
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Affiliation(s)
- Ifra SanaUllah
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, Pakistan
| | - Sidra Khan
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, Pakistan
| | - Daoud Ali
- Department of Zoology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Amna Sajjad
- Department of Zoology, Government College University, Faisalabad, Pakistan
| | - S Shamaila
- Waterloo Institute for Nanotechnology, University of Waterloo, Ontario, Canada
| | - Zakia Kanwal
- Department of Zoology, Lahore College for Women University, Lahore, Pakistan
| | - Anjum N Sabri
- Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
| | - Shahid Atiq
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, Pakistan
| | - Shahzad Naseem
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, Pakistan
| | - Saira Riaz
- Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, Pakistan.
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Gadzhimagomedova Z, Polyakov V, Pankin I, Butova V, Kirsanova D, Soldatov M, Khodakova D, Goncharova A, Mukhanova E, Belanova A, Maksimov A, Soldatov A. BaGdF 5 Nanophosphors Doped with Different Concentrations of Eu 3+ for Application in X-ray Photodynamic Therapy. Int J Mol Sci 2021; 22:ijms222313040. [PMID: 34884843 PMCID: PMC8657490 DOI: 10.3390/ijms222313040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 12/27/2022] Open
Abstract
X-ray photodynamic therapy (XPDT) has been recently considered as an efficient alternative to conventional radiotherapy of malignant tissues. Nanocomposites for XPDT typically consist of two components—a nanophosphor which re-emits X-rays into visible light that in turn is absorbed by the second component, a photosensitizer, for further generation of reactive oxygen species. In this study, BaGdF5 nanophosphors doped with different Eu:Gd ratios in the range from 0.01 to 0.50 were synthesized by the microwave route. According to transmission electron microscopy (TEM), the average size of nanophosphors was ~12 nm. Furthermore, different coatings with amorphous SiO2 and citrates were systematically studied. Micro-CT imaging demonstrated superior X-ray attenuation and sufficient contrast in the liver and the spleen after intravenous injection of citric acid-coated nanoparticles. In case of the SiO2 surface, post-treatment core–shell morphology was verified via TEM and the possibility of tunable shell size was reported. Nitrogen adsorption/desorption analysis revealed mesoporous SiO2 formation characterized by the slit-shaped type of pores that should be accessible for methylene blue photosensitizer molecules. It was shown that SiO2 coating subsequently facilitates methylene blue conjugation and results in the formation of the BaGdF5: 10% Eu3+@SiO2@MB nanocomposite as a promising candidate for application in XPDT.
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Affiliation(s)
- Zaira Gadzhimagomedova
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
- Correspondence:
| | - Vladimir Polyakov
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
| | - Ilia Pankin
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
| | - Vera Butova
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
| | - Daria Kirsanova
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
| | - Mikhail Soldatov
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
| | - Darya Khodakova
- National Medical Research Centre for Oncology, 344037 Rostov-on-Don, Russia; (D.K.); (A.G.); (A.M.)
| | - Anna Goncharova
- National Medical Research Centre for Oncology, 344037 Rostov-on-Don, Russia; (D.K.); (A.G.); (A.M.)
| | - Elizaveta Mukhanova
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
- Faculty of Chemistry, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Anna Belanova
- Academy of Biology and Biotechnologies, Southern Federal University, 344090 Rostov-on-Don, Russia;
| | - Aleksey Maksimov
- National Medical Research Centre for Oncology, 344037 Rostov-on-Don, Russia; (D.K.); (A.G.); (A.M.)
| | - Alexander Soldatov
- The Smart Materials Research Institute, Southern Federal University, 344090 Rostov-on-Don, Russia; (V.P.); (I.P.); (V.B.); (D.K.); (M.S.); (E.M.); (A.S.)
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Tellinghuisen J. A (partial) resolution of binding enthalpy discrepancies in ITC studies of Ba2+crown ether complexation: The importance of calibration. Anal Biochem 2021; 642:114481. [PMID: 34843699 DOI: 10.1016/j.ab.2021.114481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 11/10/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022]
Abstract
By conducting binding experiments at a range of temperatures T using isothermal titration calorimetry (ITC), one can obtain two estimates of the binding enthalpy - calorimetric (ΔH°cal) from the experiments at each T, and van't Hoff (ΔH°vH) from the T dependence of the binding constant K°. From thermodynamics it is clear that these two must be identical, but early efforts to demonstrate this for ITC data indicated significant inconsistency. In an extensive 2004 study of the Ba2+ + 18-crown-6 ether complexation used in prior comparisons, Mizoue and Tellinghuisen found modest (10-20%) but statistically significant differences, which were tentatively attributed to problems converting the calorimetric estimates to their standard state values, as implied by the superscript ° in the notation. In the present work the 2004 results are reanalyzed using results obtained since then from temperature, heat, and volume calibration of the instrument and a better determination of the data variance function required for the weighted least-squares fitting of the data. The new results show consistency for temperatures 5-30 °C but persistent statistically significant differences from 35-46 °C. Several possible explanations for the remaining discrepancies are examined, with methods that include fitting the K and ΔHcal data together.
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Affiliation(s)
- Joel Tellinghuisen
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA.
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Janusas T, Urbaite S, Palevicius A, Nasiri S, Janusas G. Biologically Compatible Lead-Free Piezoelectric Composite for Acoustophoresis Based Particle Manipulation Techniques. Sensors (Basel) 2021; 21:E483. [PMID: 33445501 PMCID: PMC7826690 DOI: 10.3390/s21020483] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/31/2020] [Accepted: 01/09/2021] [Indexed: 01/15/2023]
Abstract
This research paper is concentrated on the design of biologically compatible lead-free piezoelectric composites which may eventually replace traditional lead zirconium titanate (PZT) in micromechanical fluidics, the predominantly used ferroelectric material today. Thus, a lead-free barium-calcium zirconate titanate (BCZT) composite was synthesized, its crystalline structure and size, surface morphology, chemical, and piezoelectric properties were analyzed, together with the investigations done in variation of composite thin film thickness and its effect on the element properties. Four elements with different thicknesses of BCZT layers were fabricated and investigated in order to design a functional acoustophoresis micromechanical fluidic element, based on bulk acoustic generation for particle control technologies. Main methods used in this research were as follows: FTIR and XRD for evaluation of chemical and phase composition; SEM-for surface morphology; wettability measurements were used for surface free energy evaluation; a laser triangular sensing system-for evaluation of piezoelectric properties. XRD results allowed calculating the average crystallite size, which was 65.68 Å3 confirming the formation of BCZT nanoparticles. SEM micrographs results showed that BCZT thin films have some porosities on the surface with grain size ranging from 0.2 to 7.2 µm. Measurements of wettability showed that thin film surfaces are partially wetting and hydrophilic, with high degree of wettability and strong solid/liquid interactions for liquids. The critical surface tension was calculated in the range from 20.05 to 27.20 mN/m. Finally, investigations of piezoelectric properties showed significant results of lead-free piezoelectric composite, i.e., under 5 N force impulse thin films generated from 76 mV up to 782 mV voltages. Moreover, an experimental analysis showed that a designed lead-free BCZT element creates bulk acoustic waves and allows manipulating bio particles in this fluidic system.
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Affiliation(s)
| | | | | | | | - Giedrius Janusas
- Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu str. 56, LT–51424 Kaunas, Lithuania; (T.J.); (S.U.); (A.P.); (S.N.)
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Xue Y, Lofland S, Hu X. Comparative Study of Silk-Based Magnetic Materials: Effect of Magnetic Particle Types on the Protein Structure and Biomaterial Properties. Int J Mol Sci 2020; 21:E7583. [PMID: 33066665 PMCID: PMC7589181 DOI: 10.3390/ijms21207583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 12/12/2022] Open
Abstract
This study investigates combining the good biocompatibility and flexibility of silk protein with three types of widely used magnetic nanoparticles to comparatively explore their structures, properties and potential applications in the sustainability and biomaterial fields. The secondary structure of silk protein was quantitatively studied by infrared spectroscopy. It was found that magnetite (Fe3O4) and barium hexaferrite (BaFe12O19) can prohibit β-sheet crystal due to strong coordination bonding between Fe3+ ions and carboxylate ions on silk fibroin chains where cobalt particles showed minimal effect. This was confirmed by thermal analysis, where a high temperature degradation peak was found above 640 °C in both Fe3O4 and BaFe12O19 samples. This was consistent with the magnetization studies that indicated that part of the Fe in the Fe3O4 and BaFe12O19 was no longer magnetic in the composite, presumably forming new phases. All three types of magnetic composites films maintained high magnetization, showing potential applications in MRI imaging, tissue regeneration, magnetic hyperthermia and controlled drug delivery in the future.
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Affiliation(s)
- Ye Xue
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (Y.X.); (S.L.)
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA
| | - Samuel Lofland
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (Y.X.); (S.L.)
| | - Xiao Hu
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA; (Y.X.); (S.L.)
- Department of Biomedical Engineering, Rowan University, Glassboro, NJ 08028, USA
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
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Lyubutin I, Starchikov S, Troyan I, Nikiforova Y, Lyubutina M, Gavriliuk A. Pressure Induced Spin Crossover and Magnetic Properties of Multiferroic Ba 3NbFe 3Si 2O 14. Molecules 2020; 25:molecules25173808. [PMID: 32825707 PMCID: PMC7504703 DOI: 10.3390/molecules25173808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/15/2020] [Accepted: 08/19/2020] [Indexed: 12/03/2022] Open
Abstract
Recently, the iron containing langasite-type crystal Ba3NbFe3Si2O14 has attracted great attention as a new magnetically induced multiferroic. In this work, magnetic, structural and electronic properties of the multiferroic Ba3NbFe3Si2O14 were investigated by several methods, including synchrotron X-ray diffraction, Raman spectroscopy and synchrotron Mössbauer source technique at high quasi-hydrostatic pressures (up to 70 GPa), created in diamond anvil cells. At room temperature, two structural transitions at pressures of about 3.0 and 17.5 GPa were detected. Mössbauer studies at high pressures revealed a radical change in the magnetic properties during structural transitions. At pressures above 18 GPa, the crystal transforms into two magnetic fractions, and in one of them the Néel temperature (TN) increases by about four times compared with the TN value in the initial phase (from 27 to 115 K). At pressures above 50 GPa, a spin crossover occurs when the fraction of iron Fe3+ ions in oxygen octahedra transits from the high-spin (HS, S = 5/2) to the low-spin (LS, S = 1/2) state. This leads to a new change in the magnetic properties. The magnetic ordering temperature of the LS sublattice was found to be of about 22(1) K, and magnetic correlations between HS and LS sublattices were studied.
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Affiliation(s)
- Igor Lyubutin
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
| | - Sergey Starchikov
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
- Correspondence: ; Tel.: +7-499-330-8329
| | - Ivan Troyan
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
| | - Yulia Nikiforova
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
| | - Marianna Lyubutina
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
| | - Alexander Gavriliuk
- Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics” of Russian Academy of Sciences, 119333 Moscow, Russia; (I.L.); (I.T.); (Y.N.); (M.L.); (A.G.)
- Institute for Nuclear Research, Russian Academy of Sciences, Troitsk, 142190 Moscow, Russia
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Moghzi F, Soleimannejad J, Janczak J. Dual-emitting barium based metal-organic nanosheets as a potential sensor for temperature and anthrax biomarkers. Nanotechnology 2020; 31:245706. [PMID: 32126532 DOI: 10.1088/1361-6528/ab7c4b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of novel 2D materials, due to the promising applications they have enabled through their unique properties, has attracted increasingly more research interest. In this regard, novel dual-emitting coordination polymer nanosheets were developed by doping Eu3+ and Tb3+ ions into the nanostructures of the [Ba(DPA)2(H2O)2] n (DPA = dipicolinic acid) coordination polymer (BCP). Single crystal x-ray crystallography revealed that BCP is a 1D coordination polymer and its three-dimensional supramolecular architecture is constructed with a relatively strong hydrogen bonding in the ac crystallographic plane and weak non-covalent interactions along the b axis. Using energetic ultrasound irradiations, synthesis of nanoscale BCP along with the unzipping of the weak interactions between the ac layers was accomplished. The resulting BCP nanosheets was used as the host lattice and was doped with Eu3+ and Tb3+ ions. Remarkably, the sensing ability of both Eu3+ and Tb3+ doped coordination polymer (Ln@BCP) nanosheets towards temperature and the DPA anthrax biomarker were investigate. The high relative sensitivity value of 2.42% K-1 and their reusability, makes Ln@BCP nanosheets an ideal candidate for the nanothermometry. They also exhibited high selective detection characteristics towards the DPA anthrax biomarker with a 0.03 nM detection limit. Therefore, Ln@BCP nanosheets can also be considered as an efficient multi-responsive optical sensor.
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Affiliation(s)
- Faezeh Moghzi
- School of Chemistry, College of Science, University of Tehran, PO Box 14155-6455, Tehran, Iran
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12
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Dranseikiene D, Schrüfer S, Schubert DW, Reakasame S, Boccaccini AR. Cell-laden alginate dialdehyde-gelatin hydrogels formed in 3D printed sacrificial gel. J Mater Sci Mater Med 2020; 31:31. [PMID: 32152812 PMCID: PMC7062650 DOI: 10.1007/s10856-020-06369-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 02/20/2020] [Indexed: 06/10/2023]
Abstract
Alginate dialdehyde-gelatin (ADA-GEL) hydrogels have been reported to be suitable matrices for cell encapsulation. In general, application of ADA-GEL as bioink has been limited to planar structures due to its low viscosity. In this work, ring shaped constructs of ADA-GEL hydrogel were fabricated by casting the hydrogel into sacrificial molds which were 3D printed from 9% methylcellulose and 5% gelatin. Dissolution of the supporting structure was observed during the 1st week of sample incubation. In addition, the effect of different crosslinkers (Ba2+ and Ca2+) on the physicochemical properties of ADA-GEL and on the behavior of encapsulated MG-63 cells was investigated. It was found that Ba2+ crosslinked network had more than twice higher storage modulus, and mass decrease to 70% during incubation compared to 42% in case of hydrogels crosslinked with Ca2+. In addition, faster increase in cell viability during incubation and earlier cell network formation were observed after Ba2+ crosslinking. No negative effects on cell activity due to the use of sacrificial materials were observed. The approach presented here could be further developed for cell-laden ADA-GEL bioink printing into complex 3D structures.
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Affiliation(s)
- Dalia Dranseikiene
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Stefan Schrüfer
- Institute for Polymer Materials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Dirk W Schubert
- Institute for Polymer Materials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Supachai Reakasame
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany.
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13
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Mehta N, Kocar BD. Geochemical conditions conducive for retention of trace elements and radionuclides during shale-fluid interactions. Environ Sci Process Impacts 2019; 21:1764-1776. [PMID: 31553335 DOI: 10.1039/c9em00244h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Produced water generated during unconventional oil and gas extractions contains a complex milieu of natural and anthropogenic potentially toxic chemical constituents including arsenic (As), chromium (Cr), and cadmium (Cd), naturally occurring radioactive materials (NORMs) including U and Ra, and a myriad of organic compounds. The human-ecological health risks and challenges associated with the disposal of produced water may be alleviated by understanding geochemical controls on processes responsible for the solubilization of potentially hazardous natural shale constituents to produced water. Here, we investigated, through a series of batch treatments, the leaching behavior of As, Se, Cu, Fe, Ba, Cr, Cd, and radioactive nuclides U, Ra from shale to produced water. Specifically, the effect of four major controls on element mobility was studied: (1) solution pH, (2) ionic strength of the solution, (3) oxic-anoxic conditions, and (4) an additive used in fracking fluid. The mobilization of metals and metalloids from shale was greatest in treatments containing sodium persulfate, an oxidant and a commonly used additive in fracture fluid. In the high ionic strength treatments, dissolved Ba concentrations increased 5-fold compared to low ionic strength treatments. Overall, anoxic conditions superimposed with low pH resulted in the largest increase of dissolved metals and radionuclides such as Ra. Overall, our results suggest that (1) limiting pore water acidification by injection of alkaline fluid in carbonate-low shale and (2) minimizing strong oxidizing conditions in shale formations may result in cost-effective in situ retention of produced water contaminants.
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Affiliation(s)
- Neha Mehta
- Civil and Environmental Engineering, Massachusetts Institute of Technology, 15 Vassar St, Cambridge, MA 02139, USA
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14
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Xin L, Ruoshan L, Yinyan L, Shiqing X. Tm 3+/Yb 3+:BaMoO 4 phosphor for high-performance thermometry operating in the first biological window. Opt Lett 2019; 44:3633-3636. [PMID: 31368930 DOI: 10.1364/ol.44.003633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 06/23/2019] [Indexed: 06/10/2023]
Abstract
The development of optical thermometers operating within the first biological window (650-1000 nm) has drawn great interest lately in the biological and medical fields. Here a new type of luminescent thermometer relying on the intensity ratio between G41-F43 (652 nm) and F2,33-H63(691 nm) transitions in Tm3+/Yb3+:BaMoO4 phosphor is reported under 980 nm excitation. The thermometry is found to be independent on the excitation power, benefiting the reduction of the measurement error. Moreover, it exhibits extremely high absolute sensitivity ranging from 210.5×10-4 to 1034.5×10-4 K-1 in 298-498 K. The maximal relative sensitivity and temperature resolutions (1.36% K-1 and 0.37 K, respectively) are also among the highest values of those previous thermometric materials. This Letter provides guidance in selecting the suitable emission bands to construct the ratiometric luminescent thermometers with high performance.
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15
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Teng Y. Energy transfer induced white-light-emitting phosphor by co-doping Ce 3+ , Tb 3+ and Mn 2+ into the single Ba 9 Lu 2 Si 6 O 24 host. LUMINESCENCE 2019; 34:432-436. [PMID: 31012253 DOI: 10.1002/bio.3635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/12/2019] [Accepted: 03/22/2019] [Indexed: 11/07/2022]
Abstract
In the Ba9 Lu2 Si6 O24 (BLS) host, Ce3+ shows cyan emissions peaking at 490 nm under 400 nm excitations. BLS:Tb3+ only can be effectively excited by 254 nm light and gives rise to green emissions at 553 nm. However, both the cyan and green emissions can be obtained in BLS:Ce3+ ,Tb3+ under 400 nm excitations due to effective energy transfers from Ce3+ to Tb3+ . BLS:Mn2+ shows red emissions peaking at 610 nm under 414 nm excitations. By co-doping Ce3+ , Tb3+ and Mn2+ , tunable full-color emissions were obtained. The BLS:0.3Ce3+ ,0.6Tb3+ ,0.15Mn2+ single phosphor exhibits a white light with a high color rendering index of 85 and a correlated color temperature of 5480 K under 400 nm excitation.
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Affiliation(s)
- Yongfu Teng
- College of Science, Qiqihar University, Qiqihar, China
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16
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Dobrzyńska I. Association equilibria of divalent ions on the surface of liposomes formed from phosphatidylcholine. Eur Phys J E Soft Matter 2019; 42:3. [PMID: 30643999 DOI: 10.1140/epje/i2019-11762-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
Divalent ions, in particular calcium ions, constitute important macroelements in living organisms. They are also found in cell membranes, i.e., ensuring their stabilization or participating in synaptic transmission of nerve impulses. The aim of this work is to describe the interactions of divalent ions, such as Ca2+, Ba2+, and Sr2+, in electrolytes with the functional groups on the surface of liposomes formed from phosphatidylcholine (PC). Microelectrophoresis is used to determine the surface charge density as a function of pH. The interactions between ions found in solution and the functional groups of PC are described with the use of a seven-equilibrium mathematical model. Using this model along with experimental data on the charge density of the membrane surface, the association constants characterizing this equilibrium are determined. These parameters are used to calculate the theoretical model curves. The validity of the proposed model is confirmed by comparing the theoretically calculated changes in charge density on the liposome surface with the experimental results.
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Affiliation(s)
- Izabela Dobrzyńska
- Institute of Chemistry, University of Białystok, Ciołkowskiego 1K, 15-245, Białystok, Poland.
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Yazdanpanah A, Moztarzadeh F. Synthesis and characterization of Barium-Iron containing magnetic bioactive glasses: The effect of magnetic component on structure and in vitro bioactivity. Colloids Surf B Biointerfaces 2018; 176:27-37. [PMID: 30590346 DOI: 10.1016/j.colsurfb.2018.12.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 12/11/2018] [Accepted: 12/12/2018] [Indexed: 11/18/2022]
Abstract
CaO-P2O5-SiO2-BaO-Fe2O3 magnetic bioactive glasses were prepared via an optimized sol-gel method. This study is focused on investigating effects of magnetic content addition on the bioactive glass properties. To this aim, we evaluate the physical, rheological, and biocompatibility properties of synthesized magnetic bioactive glass. The morphology and composition of these glasses were studied using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The particle size was also determined using Laser Particle Size Analyzer (LPSA). The thermal measurements were carried out using Differential Thermal Analysis (DTA). For assessing the in-vitro bioactive character of synthesized glasses, the ability for apatite formation on their surface upon immersion in simulated body fluid (SBF) was checked using SEM, EDX and pH measurements. Furthermore, the Ca, Si, Ba and Fe ions in SBF were monitored using Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The results showed that the addition of Ba and Fe in the glass composition affect formation of apatite layer onto the glass surfaces. Morphologies of the apatite layers were also different in which the bioactivity decreased with increasing Fe concentration, but the increase of Ba concentration led to an increase in bioactivity. However all of the synthesized glasses are still highly bioactive. Finally, this research demonstrates that the synthesized magnetic bioactive glasses are nontoxic and biocompatible and they can be used as thermoseeds for cancer hyperthermia studies.
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Affiliation(s)
- A Yazdanpanah
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran
| | - F Moztarzadeh
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
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18
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Abstract
Insoluble BaSO4 scale is a costly and time-consuming problem in the petroleum industry. Clearance of BaSO4-impeded pipelines requires chelating agents that can efficiently bind Ba2+, the largest nonradioactive +2 metal ion. Due to the poor affinity of currently available chelating agents for Ba2+, however, the dissolution of BaSO4 remains inefficient, requiring very basic solutions of ligands. In this study, we investigated three diaza-18-crown-6 macrocycles bearing different pendent arms for the chelation of Ba2+ and assessed their potential for dissolving BaSO4 scale. Remarkably, the bis-picolinate ligand macropa exhibits the highest affinity reported to date for Ba2+ at pH 7.4 (log K' = 10.74), forming a complex of significant kinetic stability with this large metal ion. Furthermore, the BaSO4 dissolution properties of macropa dramatically surpass those of the state-of-the-art ligands DTPA and DOTA. Using macropa, complete dissolution of a molar equivalent of BaSO4 is reached within 30 min at room temperature in pH 8 buffer, conditions under which DTPA and DOTA only achieve 40% dissolution of BaSO4. When further applied for the dissolution of natural barite, macropa also outperforms DTPA, showing that this ligand is potentially valuable for industrial processes. Collectively, this work demonstrates that macropa is a highly effective chelator for Ba2+ that can be applied for the remediation of BaSO4 scale.
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Affiliation(s)
- Nikki A. Thiele
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA
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Oh SH, Ko JH, Lee HY, Lazar I, Roleder K. Precursor Phenomena of Barium Titanate Single Crystals Grown Using a Solid-State Single Crystal Growth Method Studied with Inelastic Brillouin Light Scattering and Birefringence Measurements. Molecules 2018; 23:E3171. [PMID: 30513779 PMCID: PMC6321232 DOI: 10.3390/molecules23123171] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 11/17/2022] Open
Abstract
The nature of precursor phenomena in the paraelectric phase of ferroelectrics is one of the main questions to be resolved from a fundamental point of view. Barium titanate (BaTiO₃) is one of the most representative perovskite-structured ferroelectrics intensively studied until now. The pretransitional behavior of BaTiO₃ single crystal grown using a solid-state crystal growth (SSCG) method was investigated for the first time and compared to previous results. There is no melting process in the SSCG method, thus the crystal grown using a SSCG method have inherent higher levels of impurity and defect concentrations, which is a good candidate for investigating the effect of crystal quality on the precursor phenomena. The acoustic, dielectric, and piezoelectric properties, as well as birefringence, of the SSCG-grown BaTiO₃ were examined over a wide temperature range. Especially, the acoustic phonon behavior was investigated in terms of Brillouin spectroscopy, which is a complementary technique to Raman spectroscopy. The obtained precursor anomalies of the SSCG-grown BaTiO₃ in the cubic phase were similar to those of other single crystals, in particular, of high-quality single crystal grown by top-seeded solution growth method. These results clearly indicate that the observed precursor phenomena are common and intrinsic effect irrespective of the crystal quality.
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Affiliation(s)
- Soo Han Oh
- Department of Physics, Nano Convergence Technology Center, Hallym University, Chuncheon, Gangwondo 24252, Korea.
| | - Jae-Hyeon Ko
- Department of Physics, Nano Convergence Technology Center, Hallym University, Chuncheon, Gangwondo 24252, Korea.
| | - Ho-Yong Lee
- Department of Materials Science and Engineering, Sunmoon University, Asan Chungnam 31460, Korea.
| | - Iwona Lazar
- Institute of Physics, University of Silesia, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.
| | - Krystian Roleder
- Institute of Physics, University of Silesia, ul. 75 Pułku Piechoty 1, 41-500 Chorzów, Poland.
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Antholine WE, Zhang S, Gonzales J, Newman N. Better Resolution of High-Spin Cobalt Hyperfine at Low Frequency: Co-Doped Ba(Zn 1/3Ta 2/3)O₃ as a Model Complex. Int J Mol Sci 2018; 19:ijms19113532. [PMID: 30423944 PMCID: PMC6274703 DOI: 10.3390/ijms19113532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/02/2018] [Accepted: 11/06/2018] [Indexed: 11/30/2022] Open
Abstract
Low-frequency electron paramagnetic resonance (EPR) is used to extract the EPR parameter A-mid and support the approximate X-band value of g-mid for Ba(CoyZn1/3−yTa2/3)O3. Although the cobalt hyperfine structure for the |±1/2〉 state is often unresolved at X-band or S-band, it is resolved in measurements on this compound. This allows for detailed analysis of the molecular orbital for the |±1/2〉 state, which is often the ground state. Moreover, this work shows that the EPR parameters for Co substituted into Zn compounds give important insight into the properties of zinc binding sites.
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Affiliation(s)
- William E Antholine
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Shengke Zhang
- Materials Program, Arizona State University, Tempe, AZ 85287, USA.
| | - Justin Gonzales
- Materials Program, Arizona State University, Tempe, AZ 85287, USA.
| | - Nathan Newman
- Materials Program, Arizona State University, Tempe, AZ 85287, USA.
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Lohrer B, Bracher F. A convenient identification of carbamate-derived drug substances. Pharmazie 2018; 73:555-558. [PMID: 30223917 DOI: 10.1691/ph.2018.8092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The "second identification" of drugs in pharmacies and hospital pharmacies affords the availability of easy to perform and robust tests. Besides determination of melting points and simple chromatography (TLC), reliable color and precipitation reactions are common techniques for this purpose. Preferentially, these reactions allow for the identification of typical functional groups in the drugs. Here we present a reaction for identification of carbamate-type drugs, based on the precipitation of barium carbonate upon treating the analytes with barium hydroxide solution at 80 °C. This method works well for carbamate drugs with noteworthy water solubility like carbachol, neostigmine bromide, and pyridostigmine bromide, and could be considered as a method for second identification of these drugs in pharmacopoeias and in Deutscher Arzneimittel-Codex/Neues Rezeptur-Formularium (DAC-NRF).
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Ribeiro PRCDC, Viana DG, Pires FR, Egreja Filho FB, Bonomo R, Cargnelutti Filho A, Martins LF, Cruz LBS, Nascimento MCP. Selection of plants for phytoremediation of barium-polluted flooded soils. Chemosphere 2018; 206:522-530. [PMID: 29778077 DOI: 10.1016/j.chemosphere.2018.05.056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 04/19/2018] [Accepted: 05/09/2018] [Indexed: 05/19/2023]
Abstract
The use of barite (BaSO4) in drilling fluids for oil and gas activities makes barium a potential contaminant in case of spills onto flooded soils, where low redox conditions may increase barium sulfate solubility. In order to select plants able to remove barium in such scenarios, the following species were evaluated on barium phytoextraction capacity: Brachiaria arrecta, Cyperus papyrus, Eleocharis acutangula, E. interstincta, Nephrolepsis cf. rivularis, Oryza sativa IRGA 424, O. sativa BRS Tropical, Paspalum conspersum, and Typha domingensis. Plants were grown in pots and exposed to six barium concentrations: 0, 2.5, 5.0, 10.0, 30.0, and 65.0 mg kg-1. To simulate flooding conditions, each pot was kept with a thin water film over the soil surface (∼1.0 cm). Plants were evaluated for biomass yield and barium removal. The highest amount of barium was observed in T. domingensis biomass, followed by C. papyrus. However, the latter exported most of the barium to the aerial part of the plant, especially at higher BaCl2 doses, while the former accumulated barium preferentially in the roots. Thus, barium removal with C. papyrus could be achieved by simply harvesting aerial biomass. The high amounts of barium in T. domingensis and C. papyrus resulted from the combination of high barium concentration in plant tissues with high biomass production. These results make T. domingensis and C. papyrus potential candidates for phytoremediation schemes to remove barium from flooded soils.
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Affiliation(s)
| | - Douglas Gomes Viana
- Department of Agricultural and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
| | - Fábio Ribeiro Pires
- Department of Agricultural and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
| | | | - Robson Bonomo
- Department of Agricultural and Biological Sciences, Federal University of Espírito Santo, São Mateus, ES, Brazil.
| | - Alberto Cargnelutti Filho
- Division of Plant Experimentation, Department of Crop Sciences, Federal University of Santa Maria, RS, Brazil.
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23
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Böttcher ME, Neubert N, von Allmen K, Samankassou E, Nägler TF. Barium isotope fractionation during the experimental transformation of aragonite to witherite and of gypsum to barite, and the effect of ion (de)solvation. Isotopes Environ Health Stud 2018; 54:324-335. [PMID: 29400989 DOI: 10.1080/10256016.2018.1430692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 11/23/2017] [Indexed: 06/07/2023]
Abstract
In this study, we present the experimental results for stable barium (Ba) isotope fractionation (137Ba/134Ba) during the transformation of aragonite (CaCO3) and gypsum (CaSO4·2H2O) in Ba-bearing aqueous solution to witherite (BaCO3) and barite (BaSO4), respectively. The process was studied at three temperatures between 4 and 60 °C. In all cases, the transformation leads to a relative enrichment of the lighter 134Ba isotope in the solid compared to the aqueous solution, with 137/134Ba enrichment factors between -0.11 and -0.17 ‰ for BaCO3, and -0.21 and -0.26 ‰ for BaSO4. The corresponding mass-dependent 138/134Ba enrichment factors are -0.15 to -0.23 ‰ for BaCO3, and -0.28 to -0.35 ‰ for BaSO4. The magnitude of isotope fractionation is within the range of recent reports for witherite and barite formation, as well as trace Ba incorporation into orthorhombic aragonite, and no substantial impact of temperature can be found between 4 and 80 °C. In previous studies, ion (de)solvation has been suggested to impact both the crystallization process of Ba-bearing solids and associated Ba isotope fractionation. Precipitation experiments of BaSO4 and BaCO3 using an methanol-containing aqueous solution indicate only a minor effect of ion and crystal surface (de)solvation on the overall Ba isotope fractionation process.
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Affiliation(s)
- Michael E Böttcher
- a Geochemistry & Stable Isotope Biogeochemistry Group, Department Marine Geology , Leibniz Institute for Baltic Sea Research , Warnemünde , Germany
| | - Nadja Neubert
- a Geochemistry & Stable Isotope Biogeochemistry Group, Department Marine Geology , Leibniz Institute for Baltic Sea Research , Warnemünde , Germany
- b Institute of Geological Sciences, University of Bern , Bern , Switzerland
| | - Katja von Allmen
- c Section of Earth and Environmental Sciences , University of Geneva , Geneva , Switzerland
| | - Elias Samankassou
- c Section of Earth and Environmental Sciences , University of Geneva , Geneva , Switzerland
| | - Thomas F Nägler
- b Institute of Geological Sciences, University of Bern , Bern , Switzerland
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Duarte RM, Benaduce AP, Garcia L, Gomes LC, Gomes AC, Val AL, Baldisserotto B. High waterborne Mg does not attenuate the toxic effects of Fe, Mn, and Ba on Na + regulation of Amazonian armored catfish tamoatá (Hoplosternum litoralle). Environ Sci Pollut Res Int 2018; 25:18027-18037. [PMID: 29691741 DOI: 10.1007/s11356-018-2064-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
Formation water (FoW) is a by-product from oil and gas production and usually has high concentrations of soluble salts and metals. Calcium (Ca) and magnesium (Mg) have been shown to reduce the toxicity of metals to aquatic animals, and previous study showed that high waterborne Ca exerts mild effect against disturbances on Na+ regulation in Amazonian armored catfish tamoatá (Hoplosternum littorale) acutely exposed to high Fe, Mn, and Ba levels. Here, we hypothesized that high Mg levels might also reduce the toxic effects of these metals on Na+ regulation of tamoatá. The exposure to 5% FoW promoted an increase in Na+ uptake and a rapid accumulation of Na+ in all tissues analyzed (kidney<plasma<gills<carcass<liver), besides increasing the branchial activity of both NKA and v-type H+-ATPase in fish. High waterborne Mg lowered Na+ efflux rates and markedly inhibited Na+ uptake, and also reduced both NKA activity and newly Na+ accumulation in gills of fish. High Fe levels increased Na+ net losses and inhibited Na+ uptake in tamoatá. The diffusive Na+ losses and the newly accumulated Na+ in gills were reduced in fish exposed to high Mn and Ba. High waterborne Ba also inhibited NKA in gills, while both high Mn and Ba inhibited v-type H+-ATPase in kidney of tamoatá. High Mg did not lessen the toxic effect of Fe on Na+ net fluxes, and reduced even more Na+ uptake and the newly Na+ accumulation in gills and plasma, and did not prevent the inhibition of both NKA and v-type H+-ATPases in kidney. Furthermore, Mg did not attenuate the effect of Mn on inhibition Na+ uptake, keeping the activity of v-type H+-ATPase in kidney significantly lowered. High Mg levels mildly attenuated the effects of Ba in Na+ balance by increasing the new accumulation of Na+ in liver, and restore the activity of both NKA and v-type H+-ATPase in gills of tamoatá. Overall, high waterborne Mg does not have a strong contribution to, or have only minor effects, in protecting tamoatá against disruptions in Na+ regulation mediated by high Fe, Mn, and Ba levels.
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Affiliation(s)
- Rafael M Duarte
- Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Amazonian Research, Manaus, AM, Brazil.
- São Paulo State University (UNESP), Institute of Biosciences, Campus do Litoral Paulista, Pça Infante Dom Henrique s/no, Parque Bitaru, São Vicente, SP, 11330-900, Brazil.
| | - Ana Paula Benaduce
- Department of Biological Sciences, Florida International University, Miami, FL, USA
| | - Luciano Garcia
- Instituto de Oceanografia, Laboratório de Aquacultura Continental, Universidade Federal do Rio Grande - FURG, Rio Grande, RS, Brazil
| | - Levy C Gomes
- Laboratório de Ictiologia Aplicada, Universidade Vila Velha, Vila Velha, ES, Brazil
| | | | - Adalberto L Val
- Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Amazonian Research, Manaus, AM, Brazil
| | - Bernardo Baldisserotto
- Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
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Ebrahimi P, Vilcáez J. Effect of brine salinity and guar gum on the transport of barium through dolomite rocks: Implications for unconventional oil and gas wastewater disposal. J Environ Manage 2018; 214:370-378. [PMID: 29544109 DOI: 10.1016/j.jenvman.2018.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 12/22/2017] [Accepted: 03/02/2018] [Indexed: 06/08/2023]
Abstract
This research aimed to elucidate the effect of brine salinity and guar gum on the sorption and transport of Ba in dolomite rocks collected from the Arbuckle formation in Oklahoma, USA. Guar gum represents the most important organic additive used in viscosified fracturing fluids, and Ba constitutes the most common and abundant heavy metal found in unconventional oil and gas (UOG) wastewater. Batch experiments conducted using powdered dolomite rocks (500-600 μm particle size) revealed that at brine salinities of UOG wastewater, chloro-complexation reactions between Ba and Cl ions and pH changes that results from dolomite dissolution are the controlling factors of Ba sorption on dolomite. Competition of Ba with common cations (Ca and Mg) for hydration sites of dolomite, plays a secondary role. Core-flooding experiments conducted to analyze the transport of Ba through natural and synthetic dolomite core plugs are in agreement with the batch sorption experimental results. The transport of Ba through dolomite rocks, increases with increasing brine salinity (0-180,000 mg-NaCl/L). The presence guar gum (50-500 mg/L) does not affect the transport of Ba through dolomite rocks of high flow properties (25-29.6% porosity, 9.6-13.7 mD permeability). However, core-flooding experiments conducted using tight dolomite rocks (6.5-8.6% porosity, 0.06-0.3 mD permeability), revealed that guar gum can retard the transport of Ba by clogging high permeability/porosity regions of tight dolomite rocks. The mechanism of Ba sorption on dolomite can be represented by a sorption model that accounts for both surface complexation reactions on three distinct hydration sites (>CaOHo, >MgOHo, and >CO3Ho), and the kinetic dissolution of dolomite. These results are important in understanding and predicting the fate of Ba present in UOG wastewater disposed into deep dolomite saline aquifers.
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Affiliation(s)
- Pouyan Ebrahimi
- Boone Pickens School of Geology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Javier Vilcáez
- Boone Pickens School of Geology, Oklahoma State University, Stillwater, OK 74078, USA.
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do Amaral Sobrinho NMB, Ceddia MB, Zonta E, Magalhães MOL, de Freitas FC, Lima ESA. Spatial variability and solubility of barium in a petroleum well-drilling waste disposal area. Environ Monit Assess 2018; 190:228. [PMID: 29550879 DOI: 10.1007/s10661-018-6566-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
The petroleum industry generates a range of wastes which is often are disposed in soil close to the well location, negatively affecting soil and water quality. The objective of this study was to evaluate the solubility and map the spatial variability of barium in a potentially contaminated area. The study area consisted of a petroleum well-drilling waste disposal site located in the municipality of Mato Rico-PR. A large georeferenced sampling grid was organized. Soil samples were collected at depths of 30, 60, 90, and 120 cm for determination of the "pseudo-total" concentrations and geochemical fractionation of barium. The barium concentrations showed spatial dependence, which permitted the use of geostatistical interpolators. Regarding depth, the depth of 0-30 cm showed the largest contaminated area; however, higher concentrations of barium were found at the depth of 60-90 cm. The results of geochemical fractionation showed that the analyzed samples contained percentages higher than 99% in the non-labile fraction (residual). These results indicate clearly that the barium was in a condition of low solubility, even for samples that had the highest concentrations, presenting low-environmental risk.
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Affiliation(s)
| | - Marcos Bacis Ceddia
- Federal Rural University of Rio de Janeiro (Universidade Federal Rural do Rio de Janeiro - UFRRJ), Seropédica, RJ, Brazil
| | - Everaldo Zonta
- Federal Rural University of Rio de Janeiro (Universidade Federal Rural do Rio de Janeiro - UFRRJ), Seropédica, RJ, Brazil
| | | | - Fábio Cardoso de Freitas
- Mato Grosso State University (Universidade do Estado de Mato Grosso), Tangará da Serra, MT, Brazil
- Federal University of Rio de Janeiro (UFRRJ), Campus Três Rios, RJ, Brazil
| | - Erica Souto Abreu Lima
- Federal Rural University of Rio de Janeiro (Universidade Federal Rural do Rio de Janeiro - UFRRJ), Seropédica, RJ, Brazil.
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Lu Q, Xu X, Xu Z, Liang L, Shang L, Xiao D, Zhang S, Jiang Y, Qiu G. Barium concentrations and speciation in surface waters collected from an active barium mining area in Guizhou Province, southwestern China. Environ Sci Pollut Res Int 2018; 25:7608-7617. [PMID: 29285693 DOI: 10.1007/s11356-017-0963-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 12/06/2017] [Indexed: 06/07/2023]
Abstract
Barium (Ba) is a toxic element and can cause serious health effects. Humans have experienced increased exposure to Ba due to its intensive usage in industrial areas and daily life. Anthropogenic activities of Ba mining and the manufacture of Ba containing products introduce the element into surrounding areas, posing environmental concerns. Concentrations of total Ba (TBa) and dissolved Ba (DBa) in water samples collected from active Ba mines in Tianzhu, east Guizhou Province, southwestern China were measured to show the regional dispersion of Ba contamination. Aqueous Ba species in water were calculated using the PHREEQC program. The results showed that TBa and DBa concentrations ranged from 6.7 to 483.1 μg/L and from 7.5 to 222.7 μg/L, respectively. TBa concentrations presented a high average value of 126.6 μg/L and greatly exceeded the reported common value of 10 μg/L Ba in surface water set by the Ministry of Environment Protection of China. PHREEQC results indicated that Ba species in water were present as Ba2+, BaSO4, BaHCO3, BaCO3, and BaOH+. The distribution of Ba species in water is controlled by pH and total organic carbon (TOC), and the lower pH (pH < 7) the higher the dissolved fractions. The log K d values (K d , dissolved-particulate distribution coefficients) varied from 2.41 to 6.32. Significant correlations were observed among Ba2+ and K+, Na+, Cl-, NO3-, with Pearson correlation coefficients of 0.425, 0.531, 0.853, 0.612, and 0.329, respectively (p < 0.01). Elevated Ba concentrations in water indicated that the Ba contamination and its distribution pattern in local aquatic ecosystems are derived from Ba mining sites in the Tianzhu area.
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Affiliation(s)
- Qinhui Lu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Rd., Guiyang, 550081, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xiaohang Xu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Rd., Guiyang, 550081, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Zhidong Xu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Rd., Guiyang, 550081, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Longchao Liang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550025, People's Republic of China
| | - Lihai Shang
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Rd., Guiyang, 550081, People's Republic of China
| | - Dean Xiao
- College of Resource and Environmental Engineering, Guizhou Institute of Technology, Guiyang, 550003, People's Republic of China
| | - Sensen Zhang
- Research Centre for Applied Geochemistry and Technology, Zhengzhou, 450052, People's Republic of China
- Sixth Geological Survey Division, Henan Provincial Non-ferrous Metals Geological and Mineral Resources Bureau, Zhengzhou, 450052, People's Republic of China
| | - Yuping Jiang
- Sixth Geological Survey Division, Henan Provincial Non-ferrous Metals Geological and Mineral Resources Bureau, Zhengzhou, 450052, People's Republic of China
| | - Guangle Qiu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Rd., Guiyang, 550081, People's Republic of China.
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Bocca B, Forte G, Giuffra V, Serra RM, Asara Y, Farace C, Milanese M, Tognotti E, Montella A, Bandiera P, Madeddu R. Metals in bones of the middle-aged inhabitants of Sardinia island (Italy) to assess nutrition and environmental exposure. Environ Sci Pollut Res Int 2018; 25:8404-8414. [PMID: 29307065 DOI: 10.1007/s11356-017-1140-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 12/26/2017] [Indexed: 04/15/2023]
Abstract
Metals in bones of 72 subjects lived between the twelfth and eighteenth century AC and collected in four Sardinian (Italian insular region) burial sites (Alghero, Bisarcio, Geridu, and Sassari) were determined and used as biomarkers to evaluate diet and potential social-environmental differences. Concentrations of Ba, Ca, Cd, Cu, Hg, Pb, Sr, and Zn were quantified in different types of compact bone (femur, fibula, humerus, radius, tibia, ulna) by sector field inductively coupled plasma mass spectrometry previous acidic digestion and differences among the various burial sites, centuries, types of bone, gender, and age were explored by univariate and multivariate analyses. Results indicated differences between sites in terms of diet: Bisarcio (inland village) had increased ratios of Ba/Ca and Zn/Ca due to higher incidence of vegetables, cereals, and animal foods in the diet; Geridu (coastal village) showed increased Sr/Ca ratio indicating foods of plant and marine origin that were predominant; Alghero (coastal site) and Sassari (inland site) displayed prevalently a mixed diet reflecting a higher economy and food imports. In addition, these latter sites showed increased levels of Hg/Ca (fish, drugs, cosmetics) and Pb/Ca (coins, utensils, pipeline for water). In conclusion, the elemental Ba/Ca, Sr/Ca, and Zn/Ca ratios were indicative of provenance and diet, while Hg/Ca and Pb/Ca ratios were associated to various forms of environmental exposure.
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Affiliation(s)
- Beatrice Bocca
- Italian National Institute for Health, Viale Regina Elena 299, 00161, Rome, Italy
| | - Giovanni Forte
- Italian National Institute for Health, Viale Regina Elena 299, 00161, Rome, Italy.
| | - Valentina Giuffra
- Division of Paleopathology, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
- Centre for Anthropological, Paleopathological and Historical Studies of the Sardinian and Mediterranean Populations, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Rita Maria Serra
- Centre for Anthropological, Paleopathological and Historical Studies of the Sardinian and Mediterranean Populations, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Yolande Asara
- Department of Biomedical Sciences-Histology, University of Sassari, Sassari, Italy
| | - Cristiano Farace
- Department of Biomedical Sciences-Histology, University of Sassari, Sassari, Italy
| | - Marco Milanese
- Department of History, Human Sciences and Education, University of Sassari, Sassari, Italy
| | - Eugenia Tognotti
- Department of Biomedical Sciences-Histology, University of Sassari, Sassari, Italy
| | - Andrea Montella
- Department of Biomedical Sciences-Histology, University of Sassari, Sassari, Italy
| | - Pasquale Bandiera
- Centre for Anthropological, Paleopathological and Historical Studies of the Sardinian and Mediterranean Populations, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Roberto Madeddu
- Department of Biomedical Sciences-Histology, University of Sassari, Sassari, Italy
- National Institute of Biostructures and Biosystems, Rome, Italy
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Alammar T, Slowing II, Anderegg J, Mudring A. Ionic-Liquid-Assisted Microwave Synthesis of Solid Solutions of Sr 1-x Ba x SnO 3 Perovskite for Photocatalytic Applications. ChemSusChem 2017; 10:3387-3401. [PMID: 28589568 PMCID: PMC5601214 DOI: 10.1002/cssc.201700615] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/31/2017] [Indexed: 05/07/2023]
Abstract
Nanocrystalline Sr1-x Bax SnO3 (x=0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the structure, crystallization, morphology, and photocatalytic efficiency was investigated and the samples were fully characterized. On the basis of X-ray diffraction results, as the Ba content in the SrSnO3 lattice increases, a symmetry increase was observed from the orthorhombic perovskite structure for SrSnO3 to the cubic BaSnO3 structure. The analysis of the sample morphology by SEM reveals that the Sr1-x Bax SnO3 samples favor the formation of nanorods (500 nm-5 μm in diameter and several micrometers long). The photophysical properties were examined by UV/Vis diffuse reflectance spectroscopy. The band gap decreases from 3.85 to 3.19 eV with increasing Ba2+ content. Furthermore, the photocatalytic properties were evaluated for the hydroxylation of terephthalic acid (TA). The order of the activities for TA hydroxylation was Sr0.8 Ba0.2 SnO3 >SrSnO3 >BaSnO3 >Sr0.6 Ba0.4 SnO3 >Sr0.2 Ba0.8 SnO3 . The highest photocatalytic activity was observed for Sr0.8 Ba0.2 SnO3 , and this can be attributed to the synergistic impacts of the modification of the crystal structure and morphology, the relatively large surface area associated with the small crystallite size, and the suitable band gap and band-edge position.
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Affiliation(s)
- Tarek Alammar
- Department of Materials Science and EngineeringIowa State UniversityAmesIA50011USA
- The Ames LaboratoryU.S. Department of EnergyAmesIA50011USA
| | | | - Jim Anderegg
- The Ames LaboratoryU.S. Department of EnergyAmesIA50011USA
| | - Anja‐Verena Mudring
- Department of Materials Science and EngineeringIowa State UniversityAmesIA50011USA
- The Ames LaboratoryU.S. Department of EnergyAmesIA50011USA
- Department of Materials and Environmental ChemistryStockholm UniversitySvante Arrhenius väg 16C106 91StockholmSweden
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30
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Abstract
A rationalized strategy to optimize transition-metal-oxide-based redox catalysts for water splitting and syngas generation through a hybrid solar-redox process is proposed and validated. Monometallic transition metal oxides do not possess desirable properties for water splitting; however, density functional theory calculations indicate that the redox properties of perovskite-structured BaMnx Fe1-x O3-δ can be varied by changing the B-site cation compositions. Specifically, BaMn0.5 Fe0.5 O3-δ is projected to be suitable for the hybrid solar-redox process. Experimental studies confirm such predictions, demonstrating 90 % steam-to-hydrogen conversion in water splitting and over 90 % syngas yield in the methane partial-oxidation step after repeated redox cycles. Compared to state-of-the-art solar-thermal water-splitting catalysts, the rationally designed redox catalyst reported is capable of splitting water at a significantly lower temperature and with ten-fold increase in steam-to-hydrogen conversion. Process simulations indicate the potential to operate the hybrid solar-redox process at a higher efficiency than state-of-the-art hydrogen and liquid-fuel production processes with 70 % lower CO2 emissions for hydrogen production.
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Affiliation(s)
- Vasudev Pralhad Haribal
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC, 27695-7905, USA
| | - Feng He
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC, 27695-7905, USA
| | - Amit Mishra
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC, 27695-7905, USA
| | - Fanxing Li
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC, 27695-7905, USA
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31
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Pham T, Perry JL, Dosey TL, Delcour AH, Hyser JM. The Rotavirus NSP4 Viroporin Domain is a Calcium-conducting Ion Channel. Sci Rep 2017; 7:43487. [PMID: 28256607 PMCID: PMC5335360 DOI: 10.1038/srep43487] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 01/24/2017] [Indexed: 12/15/2022] Open
Abstract
Viroporins are small virus-encoded ion channel proteins. Most viroporins are monovalent selective cation channels, with few showing the ability to conduct divalent cations, like calcium (Ca2+). Nevertheless, some viroporins are known to disrupt host cell Ca2+ homeostasis, which is critical for virus replication and pathogenesis. Rotavirus nonstructural protein 4 (NSP4) is an endoplasmic reticulum transmembrane glycoprotein that has a viroporin domain (VPD), and NSP4 viroporin activity elevates cytosolic Ca2+ in mammalian cells. The goal of this study was to demonstrate that the NSP4 VPD forms an ion channel and determine whether the channel can conduct Ca2+. Using planar lipid bilayer and liposome patch clamp electrophysiology, we show that a synthetic peptide of the NSP4 VPD has ion channel activity. The NSP4 VPD was selective for cations over anions and channel activity was observed to have both well-defined "square top" openings as well as fast current fluctuations, similar to other viroporins. Importantly, the NSP4 VPD showed similar conductance of divalent cations (Ca2+ and Ba2+) as monovalent cations (K+), but a viroporin defective mutant lacked Ca2+ conductivity. These data demonstrate that the NSP4 VPD is a Ca2+-conducting viroporin and establish the mechanism by which NSP4 disturbs host cell Ca2+ homeostasis.
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Affiliation(s)
- Thieng Pham
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Jacob L. Perry
- Alkek Center for Metagenomic and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | - Timothy L. Dosey
- Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Anne H. Delcour
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - Joseph M. Hyser
- Alkek Center for Metagenomic and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
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Cam N, Benzerara K, Georgelin T, Jaber M, Lambert JF, Poinsot M, Skouri-Panet F, Cordier L. Selective Uptake of Alkaline Earth Metals by Cyanobacteria Forming Intracellular Carbonates. Environ Sci Technol 2016; 50:11654-11662. [PMID: 27712057 DOI: 10.1021/acs.est.6b02872] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The uptakes of calcium (Ca), strontium (Sr), and barium (Ba) by two cyanobacterial strains, Cyanothece sp. PCC7425 and Gloeomargarita lithophora, both forming intracellular carbonates, were investigated in laboratory cultures. In the culture medium BG-11 amended with 250 μM Ca and 50 or 250 μM Sr and Ba, G. lithophora accumulated first Ba, then Sr, and finally Ca. Sr and Ba were completely accumulated by G. lithophora cells at rates between 0.02 and 0.10 fmol h-1 cell-1 and down to extracellular concentrations below the detection limits of inductively coupled plasma atomic emission spectroscopy. Accumulation of Sr and Ba did not affect the growth rate of the strain. This sequential accumulation occurred mostly intracellularly within polyphosphate and carbonate granules and resulted in the formation of core-shell structures in carbonates. In contrast, Cyanothece sp. PCC7425 showed neither a preferential accumulation of heavier alkaline earth metals nor core-shell structures in the carbonates. This indicated that fractionation between alkaline earth metals was not inherent to intracellularly calcifying cyanobacteria but was likely a genetically based trait of G. lithophora. Overall, the capability of G. lithophora to sequester preferentially Sr and Ba at high rates may be of considerable interest for designing new remediation strategies and better understanding the geochemical cycles of these elements.
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Affiliation(s)
- Nithavong Cam
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Institut de Recherche pour le Développement (IRD) Unité Mixte de Recherche (UMR) 206, Muséum National d'Histoire Naturelle, UMR Centre National de la Recherche Scientifique (CNRS) 7590, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
- Laboratoire de Réactivité de Surface (LRS), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 7197, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Karim Benzerara
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Institut de Recherche pour le Développement (IRD) Unité Mixte de Recherche (UMR) 206, Muséum National d'Histoire Naturelle, UMR Centre National de la Recherche Scientifique (CNRS) 7590, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Thomas Georgelin
- Laboratoire de Réactivité de Surface (LRS), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 7197, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Maguy Jaber
- Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 8220, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Jean-François Lambert
- Laboratoire de Réactivité de Surface (LRS), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 7197, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Mélanie Poinsot
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Institut de Recherche pour le Développement (IRD) Unité Mixte de Recherche (UMR) 206, Muséum National d'Histoire Naturelle, UMR Centre National de la Recherche Scientifique (CNRS) 7590, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
- Laboratoire de Réactivité de Surface (LRS), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 7197, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Fériel Skouri-Panet
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Institut de Recherche pour le Développement (IRD) Unité Mixte de Recherche (UMR) 206, Muséum National d'Histoire Naturelle, UMR Centre National de la Recherche Scientifique (CNRS) 7590, Université Pierre et Marie Curie (UPMC) Université Paris 06, Sorbonne Universités , 4 Place Jussieu, 75005 Paris, France
| | - Laure Cordier
- Institut de Physique du Globe de Paris (IPGP), Unité Mixte de Recherche (UMR) Centre National de la Recherche Scientifique (CNRS) 7154, Université Paris Diderot, Sorbonne Paris Cité , 1 Rue Jussieu, 75238 Paris Cedex 05, France
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Serpell CJ, Rutte RN, Geraki K, Pach E, Martincic M, Kierkowicz M, De Munari S, Wals K, Raj R, Ballesteros B, Tobias G, Anthony DC, Davis BG. Carbon nanotubes allow capture of krypton, barium and lead for multichannel biological X-ray fluorescence imaging. Nat Commun 2016; 7:13118. [PMID: 27782209 PMCID: PMC5095174 DOI: 10.1038/ncomms13118] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 09/06/2016] [Indexed: 12/13/2022] Open
Abstract
The desire to study biology in situ has been aided by many imaging techniques. Among these, X-ray fluorescence (XRF) mapping permits observation of elemental distributions in a multichannel manner. However, XRF imaging is underused, in part, because of the difficulty in interpreting maps without an underlying cellular 'blueprint'; this could be supplied using contrast agents. Carbon nanotubes (CNTs) can be filled with a wide range of inorganic materials, and thus can be used as 'contrast agents' if biologically absent elements are encapsulated. Here we show that sealed single-walled CNTs filled with lead, barium and even krypton can be produced, and externally decorated with peptides to provide affinity for sub-cellular targets. The agents are able to highlight specific organelles in multiplexed XRF mapping, and are, in principle, a general and versatile tool for this, and other modes of biological imaging.
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Affiliation(s)
- Christopher J. Serpell
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
- School of Physical Sciences, Ingram Building, University of Kent, Canterbury, Kent CT2 7NH, UK
| | - Reida N. Rutte
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Kalotina Geraki
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Elzbieta Pach
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Markus Martincic
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, Bellaterra, 08193 Barcelona, Spain
| | - Magdalena Kierkowicz
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, Bellaterra, 08193 Barcelona, Spain
| | - Sonia De Munari
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Kim Wals
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK
| | - Ritu Raj
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
| | - Belén Ballesteros
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Gerard Tobias
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, Bellaterra, 08193 Barcelona, Spain
| | - Daniel C. Anthony
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK
| | - Benjamin G. Davis
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK
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Abstract
Achalasia is the most common primary motility disorder of the esophagus and presents as dysphagia to solids and liquids. It is characterized by impaired deglutitive relaxation of the lower esophageal sphincter. High-resolution manometry allows for definitive diagnosis and classification of achalasia, with type II being the most responsive to therapy. Since no cure for achalasia exists, early diagnosis and treatment of the disease is critical to prevent end-stage disease. The central tenant of diagnosis is to first rule out mechanical obstruction due to stricture or malignancy, which is often accomplished by endoscopic and fluoroscopic examination. Therapeutic options include pneumatic dilation (PD), surgical myotomy, and endoscopic injection of botulinum toxin injection. Heller myotomy and PD are more efficacious than pharmacologic therapies and should be considered first-line treatment options. Per oral endoscopic myotomy (POEM) is a minimally-invasive endoscopic therapy that might be as effective as surgical myotomy when performed by a trained and experienced endoscopist, although long-term data are lacking. Overall, therapy should be individualized to each patient’s clinical situation and based upon his or her risk tolerance, operative candidacy, and life expectancy. In instances of therapeutic failure or symptom recurrence re-treatment is possible and can include PD or POEM of the wall opposite the site of prior myotomy. Patients undergoing therapy for achalasia require counseling, as the goal of therapy is to improve swallowing and prevent late manifestations of the disease rather than to restore normal swallowing, which is unfortunately impossible.
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Abstract
Ceramic materials based on perovskite-like oxides have traditionally been the object of intense interest for their applicability in electrical and electronic devices. Due to its high dielectric constant and piezoelectric features, barium titanate (BaTiO3) is probably one of the most studied compounds of this family. Recently, an increasing number of studies have been focused on the exploitation of barium titanate nanoparticles (BTNPs) in the biomedical field, owing to the high biocompatibility of BTNPs and their peculiar non-linear optical properties that have encouraged their use as nanocarriers for drug delivery and as label-free imaging probes. In this review, we summarize all the recent findings about these 'smart' nanoparticles, including the latest, most promising potential as nanotransducers for cell stimulation.
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Affiliation(s)
- Giada Graziana Genchi
- Istituto Italiano di Tecnologia, Center for Micro-BioRobotics @SSSA, Viale Rinaldo Piaggio 34, 56025 Pontedera (Pisa), Italy
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Lee G, Struebing C, Wagner B, Summers C, Ding Y, Bryant A, Thadhani N, Shedlock D, Star-Lack J, Kang Z. Synthesis and characterization of a BaGdF5:Tb glass ceramic as a nanocomposite scintillator for x-ray imaging. Nanotechnology 2016; 27:205203. [PMID: 27044066 DOI: 10.1088/0957-4484/27/20/205203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Transparent glass ceramics with embedded light-emitting nanocrystals show great potential as low-cost nanocomposite scintillators in comparison to single crystal and transparent ceramic scintillators. In this study, cubic structure BaGdF5:Tb nanocrystals embedded in an aluminosilicate glass matrix are reported for potential high performance MeV imaging applications. Scintillator samples with systematically varied compositions were prepared by a simple conventional melt-quenching method followed by annealing. Optical, structural and scintillation properties were characterized to guide the design and optimization of selected material systems, aiming at the development of a system with higher crystal volume and larger crystal size for improved luminosity. It is observed that enhanced scintillation performance was achieved by tuning the glass matrix composition and using GdF3 in the raw materials, which served as a nucleation agent. A 26% improvement in light output was observed from a BaGdF5:Tb glass ceramic with addition of GdF3.
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Affiliation(s)
- Gyuhyon Lee
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA
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37
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Bamdad F, Khorram F, Samet M, Bamdad K, Sangi MR, Allahbakhshi F. Spectrophotometric determination of L-cysteine by using polyvinylpyrrolidone-stabilized silver nanoparticles in the presence of barium ions. Spectrochim Acta A Mol Biomol Spectrosc 2016; 161:52-57. [PMID: 26950501 DOI: 10.1016/j.saa.2016.02.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 02/07/2016] [Accepted: 02/28/2016] [Indexed: 06/05/2023]
Abstract
In this article a simple and selective colorimetric probe for cysteine determination using silver nano particles (AgNPS) is described. The determination process was based upon the surface plasmon resonance properties of polyvinylpyrrolidone-stabilized AgNPS. Interaction of AgNPS with cysteine molecules in the presence of barium ions induced a red shift in the surface plasmon resonance (SPR) maximum of AgNPs, as a result of nanoparticle aggregation. Consequently, yellow color of AgNP solution was changed to pink. The linear range for the determination of cysteine was 3.2-8.2 μM (R=0.9965) with a limit of detection equal to 2.8 μM (3σ). The proposed method was successfully applied to the determination of cysteine in human plasma samples. Acceptable recovery results of the spiked samples confirmed the validity of the proposed method.
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Affiliation(s)
- Farzad Bamdad
- Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran.
| | - Fateme Khorram
- Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran
| | - Maryam Samet
- Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran
| | - Kourosh Bamdad
- Department of Biology, Faculty of Science, Payame Noor University (PNU), PO Box 19395-3697, Iran
| | - Mohammad Reza Sangi
- Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran
| | - Fateme Allahbakhshi
- Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran
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Duncan KD, Volmer DA, Gill CG, Krogh ET. Rapid Screening of Carboxylic Acids from Waste and Surface Waters by ESI-MS/MS Using Barium Ion Chemistry and On-Line Membrane Sampling. J Am Soc Mass Spectrom 2016; 27:443-450. [PMID: 26689207 DOI: 10.1007/s13361-015-1311-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 11/18/2015] [Accepted: 11/19/2015] [Indexed: 06/05/2023]
Abstract
Negative ion tandem mass spectrometric analysis of aliphatic carboxylic acids often yields only non-diagnostic ([M - H](-)) ions with limited selective fragmentation. However, carboxylates cationized with Ba(2+) have demonstrated efficient dissociation in positive ion mode, providing structurally diagnostic product ions. We report the application of barium adducts followed by collision induced dissociation (CID), to improve selectivity for rapid screening of carboxylic acids in complex aqueous samples. The quantitative MS/MS method presented utilizes common product ions of [M - H + Ba](+) precursor ions. The mechanism of product ion formation is investigated using isotopically labeled standards and a series of structurally related carboxylic acids. The results suggest that hydrogen atoms in the β and γ positions yield common product ions ([BaH](+) and [BaOH](+)). Furthermore, the diagnostic product ion at m/z 196 serves as a qualifying ion for carboxylate species. This methodology has been successfully used in conjunction with condensed phase membrane introduction mass spectrometry (CP-MIMS), with barium acetate added directly to the methanol acceptor phase. The combination enables rapid screening of carboxylic acids directly from acidified water samples (wastewater effluent, spiked natural waters) using a capillary hollow fiber PDMS membrane immersion probe. We have applied this technique for the direct analysis of complex naphthenic acid mixtures spiked into natural surface waters using CP-MIMS. Selectivity at the ionization and tandem mass spectrometry level eliminate isobaric interferences from hydroxylated species present within the samples, which have been observed in negative electrospray ionization.
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Affiliation(s)
- Kyle D Duncan
- Applied Environmental Research Laboratories, Department of Chemistry, Vancouver Island University, Nanaimo, BC, Canada
- Department of Chemistry, University of Victoria, Victoria, BC, Canada
| | - Dietrich A Volmer
- Institute of Bioanalytical Chemistry, Saarland University, Saarbrücken, Germany
| | - Chris G Gill
- Applied Environmental Research Laboratories, Department of Chemistry, Vancouver Island University, Nanaimo, BC, Canada.
- Department of Chemistry, University of Victoria, Victoria, BC, Canada.
| | - Erik T Krogh
- Applied Environmental Research Laboratories, Department of Chemistry, Vancouver Island University, Nanaimo, BC, Canada.
- Department of Chemistry, University of Victoria, Victoria, BC, Canada.
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Abstract
The adsorption efficiency of Sr(2+) and Ba(2+) from aqueous solutions by zeolite 4A was investigated. Adsorption studies were carried out both in single and binary component systems. The single ion equilibrium adsorption data were fitted to three isotherm models: Langmuir, Freundlich and Dubinin-Radushkevich. The Langmuir model represents the equilibrium data better than the Freundlich model in the studied initial metal concentration (0.3-25 mmol L(-1)) in both the single and binary component systems. The obtained RL (separation factor or Langmuir parameter) values were in the range of 0-1 indicating that Sr(2+) and Ba(2+) sorption were favorable. The obtained mean free energy value for adsorption of Ba(2+) and Sr(2+) was 8.45 kJ mol(-1) and 9.12 kJ mol(-1), respectively, indicating that both ions were uptaken through an ion exchange process. The maximum adsorption capacities (Qmax) were 2.25 mmol g(-1) and 2.34 mmol g(-1) for Ba(2+) and Sr(2+) ions, respectively. Also, the study of the competitive sorption of ions in the binary system showed that zeolite 4A preferentially adsorbs cations in the following order: Ba(2+) < Sr(2+).
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Affiliation(s)
- Manel Araissi
- Materials, Environment and Energy Laboratory (UR14ES26), Science Faculty of Gafsa, University of Gafsa, Gafsa 2112, Tunisia
| | - Imen Ayed
- Materials, Environment and Energy Laboratory (UR14ES26), Science Faculty of Gafsa, University of Gafsa, Gafsa 2112, Tunisia
| | - Elimame Elaloui
- Materials, Environment and Energy Laboratory (UR14ES26), Science Faculty of Gafsa, University of Gafsa, Gafsa 2112, Tunisia; Science Faculty of Gafsa, University of Gafsa, Gafsa 2112, Tunisia E-mail:
| | - Younes Moussaoui
- Science Faculty of Gafsa, University of Gafsa, Gafsa 2112, Tunisia E-mail: ; Physical Organic Chemistry Laboratory (UR11ES74), Science Faculty of Sfax, University of Sfax, Sfax 3018, Tunisia
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40
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Sivakumar S, Venkatesan A, Soundhirarajan P, Khatiwada CP. Thermal, structural, functional, optical and magnetic studies of pure and Ba doped CdO nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc 2015; 151:760-772. [PMID: 26172463 DOI: 10.1016/j.saa.2015.06.105] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 06/25/2015] [Accepted: 06/26/2015] [Indexed: 06/04/2023]
Abstract
In this research, a chemical precipitation method was used to synthesize undoped and doped cadmium oxide nanoparticles and studied by TG-DTA, XRD, FT-IR, SEM, with EDX and antibacterial activities, respectively. The melting points, thermal stability and the kinetic parameters like entropy (ΔS), enthalpy (ΔH), Gibb's energy (ΔG), activation energy (E), frequency factor (A) were evaluated from TG-DTA measurements. X-ray diffraction analysis (XRD) brought out the information about the synthesized products exist in spherical in shape with cubic structure. The functional groups and band area of the samples were established by Fourier transform infrared (FT-IR) spectroscopy. The direct and indirect band gap energy of pure and doped samples were determined by UV-Vis-DRS. The surface morphological, elemental compositions and particles sizes were evaluated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Finally, antibacterial activities indicated the Gram-positive and Gram-negative bacteria are more active in transporter, dehydrogenize and periplasmic enzymatic activities of pure and doped samples.
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Affiliation(s)
- S Sivakumar
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608 002, India.
| | - A Venkatesan
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608 002, India
| | - P Soundhirarajan
- Department of Physics, Annamalai University, Annamalai Nagar, Tamil Nadu 608 002, India
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Serjun VZ, Mladenovič A, Mirtič B, Meden A, Ščančar J, Milačič R. Recycling of ladle slag in cement composites: Environmental impacts. Waste Manag 2015; 43:376-385. [PMID: 26008145 DOI: 10.1016/j.wasman.2015.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 04/30/2015] [Accepted: 05/04/2015] [Indexed: 06/04/2023]
Abstract
In the present work compact and ground cement composites in which 30% of cement by mass was replaced by ladle slag were investigated for their chemical and physico-mechanical properties. To evaluate long-term environmental impacts, leachability test based on diffusion, which combined both, diffusion and dissolution of contaminants, was performed in water and saline water. Total element concentrations and Cr(VI) were determined in leachates over a time period of 180days. At the end of the experiment, the mineralogical composition and the physico-mechanical stability of cement composites was also assessed. The results revealed that Cr(III) and Cr(VI) were immobilized by the hydration products formed in the cement composites with the addition of ladle slag. Cr(VI) content originating from the cement was also appreciably reduced by Fe(II) from minerals present in the added ladle slag, which thus had significant positive environmental effects. Among metals, only Mo and Ba were leached in elevated concentrations, but solely in ground cement composites with the addition of ladle slag. Lower V concentrations were observed in leachates of ground than compact composite. It was demonstrated that the presence of ladle slag in cement composites can even contribute to improved mortar resistance. The investigated ladle slag can be successfully implemented in cement composites as supplementary cementitious material.
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Affiliation(s)
- Vesna Zalar Serjun
- Slovenian National Building and Civil Engineering Institute, Dimičeva 12, 1000 Ljubljana, Slovenia
| | - Ana Mladenovič
- Slovenian National Building and Civil Engineering Institute, Dimičeva 12, 1000 Ljubljana, Slovenia
| | - Breda Mirtič
- University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Geology, Aškerčeva 12, 1000 Ljubljana, Slovenia
| | - Anton Meden
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Janez Ščančar
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
| | - Radmila Milačič
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
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42
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Yliniemi J, Pesonen J, Tiainen M, Illikainen M. Alkali activation of recovered fuel-biofuel fly ash from fluidised-bed combustion: Stabilisation/solidification of heavy metals. Waste Manag 2015; 43:273-282. [PMID: 26054963 DOI: 10.1016/j.wasman.2015.05.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/06/2015] [Accepted: 05/18/2015] [Indexed: 06/04/2023]
Abstract
Recovered fuel-biofuel fly ash from a fluidized bed boiler was alkali-activated and granulated with a sodium-silicate solution in order to immobilise the heavy metals it contains. The effect of blast-furnace slag and metakaolin as co-binders were studied. Leaching standard EN 12457-3 was applied to evaluate the immobilisation potential. The results showed that Ba, Pb and Zn were effectively immobilised. However, there was increased leaching after alkali activation for As, Cu, Mo, Sb and V. The co-binders had minimal or even negative effect on the immobilisation. One exception was found for Cr, in which the slag decreased leaching, and one was found for Cu, in which the slag increased leaching. A sequential leaching procedure was utilized to gain a deeper understanding of the immobilisation mechanism. By using a sequential leaching procedure it is possible fractionate elements into watersoluble, acid-soluble, easily-reduced and oxidisable fractions, yielding a total 'bioavailable' amount that is potentially hazardous for the environment. It was found that the total bioavailable amount was lower following alkali activation for all heavy metals, although the water-soluble fraction was higher for some metals. Evidence from leaching tests suggests the immobilisation mechanism was chemical retention, or trapping inside the alkali activation reaction products, rather than physical retention, adsorption or precipitation as hydroxides.
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Affiliation(s)
- Juho Yliniemi
- Fibre and Particle Engineering Laboratory, P.O. Box 4300, University of Oulu, 90014, Finland.
| | - Janne Pesonen
- Department of Chemistry, P.O. Box 3000, University of Oulu, 90014, Finland
| | - Minna Tiainen
- Department of Chemistry, P.O. Box 3000, University of Oulu, 90014, Finland
| | - Mirja Illikainen
- Fibre and Particle Engineering Laboratory, P.O. Box 4300, University of Oulu, 90014, Finland
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43
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Wang Y, Feng Y, Fan X, Ren L. [Three-dimensional Culture of Chondrocyte Using Methacrylic Alginate Gel Beads Cross-linked with Mixed Metal-cation]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2015; 32:599-604. [PMID: 26485985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study was to explore a better three-dimensional (3-D) culture method of chondrocyte. The interpenetrating network (IPN) gel beads were developed through a photo-cross linking reaction with mixed barium ions and calcium ions at the ratio of 5:5 with the methacrylic alginate (MA), which was a chemically conjugated alginate with methacrylic groups. The second generation of primary cartilage cells was encapsulated in the MA gel beads for three weeks. In the designated timing, HE stain, Alamar blue method and Scanning electron microscopic were used to determine the cartilage cells growth, proliferation and the cell distribution in the scaffolds, respectively. The expression of type II collagen was investigated by an immunohistochemistry assay and the glycosaminoglycan content was quantitatively evaluated with the spectrophotometry of 1, 9 dimethylene blue assay. Compared to the alginate control group, the deposition of glycosaminoglycan was significantly upregulated in IPN-MA gel beads with higher cell proliferation. The secretion of extracellular matrix and proliferation of chondrocyte in methacrylic alginate gel beads were higher than that in Alginate beads. Cells were able to attach, to grow well on the scaffolds under scanning electron microscopy. The result of immunohistochemistry staining of collagen type II was positive, confirming the maintenance of chondrocyte phenotype in methacrylic alginate gel beads. This study shows a great potential for three-dimensional culture of cartilage.
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Cai Q, Turner BD, Sheng D, Sloan S. The kinetics of fluoride sorption by zeolite: Effects of cadmium, barium and manganese. J Contam Hydrol 2015; 177-178:136-147. [PMID: 25909159 DOI: 10.1016/j.jconhyd.2015.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 06/04/2023]
Abstract
Industrial wastewaters often consist of a complex chemical cocktail with treatment of target contaminants complicated by adverse chemical reactions. The impact of metal ions (Cd(2+), Ba(2+) and Mn(2+)) on the kinetics of fluoride removal from solution by natural zeolite was investigated. In order to better understand the kinetics, the pseudo-second order (PSO), Hill (Hill 4 and Hill 5) and intra-particle diffusion (IPD) models were applied. Model fitting was compared using the Akaike Information Criterion (AIC) and the Schwarz Bayesian Information Criterion (BIC). The Hill models (Hill 4 and Hill 5) were found to be superior in describing the fluoride removal processes due to the sigmoidal nature of the kinetics. Results indicate that the presence of Mn (100 mg L(-1)) and Cd (100 mg L(-1)) respectively increases the rate of fluoride sorption by a factor of ~28.3 and ~10.9, the maximum sorption capacity is increased by ~2.2 and ~1.7. The presence of Ba (100 mg L(-1)) initially inhibited fluoride removal and very poor fits were obtained for all models. Fitting was best described with a biphasic sigmoidal model with the degree of inhibition decreasing with increasing temperature suggesting that at least two processes are involved with fluoride sorption onto natural zeolite in the presence of Ba.
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Affiliation(s)
- Qianqian Cai
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
| | - Brett D Turner
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
| | - Daichao Sheng
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
| | - Scott Sloan
- Centre of Excellence for Geotechnical Science and Engineering, Civil Surveying and Environmental Engineering, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
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45
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Zhang T, Bain D, Hammack R, Vidic RD. Analysis of radium-226 in high salinity wastewater from unconventional gas extraction by inductively coupled plasma-mass spectrometry. Environ Sci Technol 2015; 49:2969-2976. [PMID: 25642997 DOI: 10.1021/es504656q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Elevated concentration of naturally occurring radioactive material (NORM) in wastewater generated from Marcellus Shale gas extraction is of great concern due to potential environmental and public health impacts. Development of a rapid and robust method for analysis of Ra-226, which is the major NORM component in this water, is critical for the selection of appropriate management approaches to properly address regulatory and public concerns. Traditional methods for Ra-226 determination require long sample holding time or long detection time. A novel method combining Inductively Coupled Mass Spectrometry (ICP-MS) with solid-phase extraction (SPE) to separate and purify radium isotopes from the matrix elements in high salinity solutions is developed in this study. This method reduces analysis time while maintaining requisite precision and detection limit. Radium separation is accomplished using a combination of a strong-acid cation exchange resin to separate barium and radium from other ions in the solution and a strontium-specific resin to isolate radium from barium and obtain a sample suitable for analysis by ICP-MS. Method optimization achieved high radium recovery (101 ± 6% for standard mode and 97 ± 7% for collision mode) for synthetic Marcellus Shale wastewater (MSW) samples with total dissolved solids as high as 171,000 mg/L. Ra-226 concentration in actual MSW samples with TDS as high as 415,000 mg/L measured using ICP-MS matched very well with the results from gamma spectrometry. The Ra-226 analysis method developed in this study requires several hours for sample preparation and several minutes for analysis with the detection limit of 100 pCi/L with RSD of 45% (standard mode) and 67% (collision mode). The RSD decreased to below 15% when Ra-226 concentration increased over 500 pCi/L.
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Affiliation(s)
- Tieyuan Zhang
- Department of Civil & Environmental Engineering and ‡Department of Geology & Planetary Science, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States
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Nair LP, Bijini BR, Prasanna S, Eapen SM, Nair CMK, Deepa M, RajendraBabu K. Growth and characterisation of a new polymorph of barium maleate: a metal organic framework. Spectrochim Acta A Mol Biomol Spectrosc 2015; 137:778-784. [PMID: 25265523 DOI: 10.1016/j.saa.2014.08.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Revised: 08/06/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
A new polymorph of barium maleate (BM) with chemical formula C24H14O24Ba5⋅7H2O is grown by modified gel method. Transparent plate like crystals of dimensions 9×4×1 mm(3) were obtained. Single crystal X-ray Diffraction analysis was done to determine the structure and the crystal belongs to triclinic system, P-1 space group with cell dimensions a=7.2929(3) Å, b=10.5454(4) Å, c=14.2837(6) Å, α=102.0350(10)°, β=99.1580(10)°, γ=102.9170(10)°. Hydrogen bonding stabilises the two dimensional polymeric crystal structure. Fourier Transform Infrared spectroscopic method was utilised for the analysis of various functional groups present in the complex. Elemental analysis confirmed the stoichiometry of the complex. Thermal properties of the crystal were studied by TGA/DTA. The material melts at 368°C. The optical transparency of the crystal was studied using UV-Visible absorption spectra. The optical band gap is found to be 3.35 eV.
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Affiliation(s)
- Lekshmi P Nair
- Department of Physics, M.G. College, Thiruvananthapuram 695004, India
| | - B R Bijini
- Department of Physics, H.H.P.B.N.S.S. College, Thiruvananthapuram 695014, India
| | - S Prasanna
- Department of Physics, H.H.P.B.N.S.S. College, Thiruvananthapuram 695014, India
| | - S M Eapen
- STIC, Cochin University of Science & Technology, Kochi 682022, India
| | - C M K Nair
- Department of Physics, M.G. College, Thiruvananthapuram 695004, India
| | - M Deepa
- Department of Physics, All Saints' College, Thiruvananthapuram 695037, India
| | - K RajendraBabu
- Department of Physics, M.G. College, Thiruvananthapuram 695004, India; Heera College of Engineering & Technology, Thiruvananthapuram 695568, India.
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47
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Frost RL, López A, Wang L, Romano AW, Scholz R. A vibrational spectroscopic study of the silicate mineral harmotome--(Ba,Na,K)1-2(Si,Al)8O16⋅6H2O--a natural zeolite. Spectrochim Acta A Mol Biomol Spectrosc 2015; 137:70-74. [PMID: 25203212 DOI: 10.1016/j.saa.2014.07.072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 07/07/2014] [Accepted: 07/28/2014] [Indexed: 06/03/2023]
Abstract
The mineral harmotome (Ba,Na,K)1-2(Si,Al)8O16⋅6H2O is a crystalline sodium calcium silicate which has the potential to be used in plaster boards and other industrial applications. It is a natural zeolite with catalytic potential. Raman bands at 1020 and 1102 cm(-1) are assigned to the SiO stretching vibrations of three dimensional siloxane units. Raman bands at 428, 470 and 491 cm(-1) are assigned to OSiO bending modes. The broad Raman bands at around 699, 728, 768 cm(-1) are attributed to water librational modes. Intense Raman bands in the 3100 to 3800 cm(-1) spectral range are assigned to OH stretching vibrations of water in harmotome. Infrared spectra are in harmony with the Raman spectra. A sharp infrared band at 3731 cm(-1) is assigned to the OH stretching vibration of SiOH units. Raman spectroscopy with complimentary infrared spectroscopy enables the characterization of the silicate mineral harmotome.
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Affiliation(s)
- Ray L Frost
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
| | - Andrés López
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia
| | - Lina Wang
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia; School of Chemistry and Chemical Engineering, Tianjin University of Technology, No. 391, Bin Shui West Road, Xi Qing District, Tianjin, PR China
| | - Antônio Wilson Romano
- Geology Department, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Ricardo Scholz
- Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35400-00, Brazil
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48
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Samuvel K, Ramachandran K. Dielectric and magnetic studies of BaTi0.5Fe0.5O3 ceramic materials, synthesized by solid state sintering. Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt B:437-442. [PMID: 25315869 DOI: 10.1016/j.saa.2014.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/11/2014] [Accepted: 09/18/2014] [Indexed: 06/04/2023]
Abstract
A comparative study of the surface morphology, dielectric and magnetic properties of the BaTi0.5Fe0.5O3 (BTFO) ceramics materials. This has been carried out by synthesizing the samples in different routes. BTFO samples have shown single phased 12R type hexagonal structure with R3m, P4mm space group. Interfacial effects on the dielectric properties of the samples have been understood by Cole-Cole plots in complex impedance and modulus formalism. It has been identified that huge dielectric constant (10(3)-10(6)) at lower frequencies is largely contributed by the heterogeneous electronic microstructure at the interfaces of grains. Modulus formalism has identified the effects of both grain and grain boundary microstructure on the dielectric properties, particularly in chemical routed samples. The order of grain boundary resistivity suggests the semiconductor/insulator class of the material. The grain boundary resistivity of the mechanical alloyed samples is remarkably lower than the solid state and chemical routed samples. Few samples have of the samples have exhibited signature of ferromagnetism at the room temperature.
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Affiliation(s)
- K Samuvel
- Department of Physics, Faculty of Engineering and Technology, Vadapalani Campus, SRM University, Chennai 600026, Tamil Nadu, India
| | - K Ramachandran
- Department of Physics, Faculty of Engineering and Technology, Vadapalani Campus, SRM University, Chennai 600026, Tamil Nadu, India.
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Annapoorani K, Maheshvaran K, Arunkumar S, Suriya Murthy N, Marimuthu K. Structural and luminescence behavior of Er(3+) ions doped Barium tellurofluoroborate glasses. Spectrochim Acta A Mol Biomol Spectrosc 2015; 135:1090-1098. [PMID: 25173526 DOI: 10.1016/j.saa.2014.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 06/05/2014] [Accepted: 08/04/2014] [Indexed: 06/03/2023]
Abstract
Er(3+) doped Barium tellurofluoroborate glasses (BTFBxE) with the chemical composition (30-x)TeO2+30B2O3+20BaO+20BaF+xEr2O3 (where x=0.01, 0.05, 0.1, 0.5, 1.0 and 2.0 in wt%) were prepared following the melt quenching technique. The different vibrational modes of borates and tellurites in the prepared glasses were explored through FTIR and Raman spectra. The optical absorption spectra have been used to determine the ionic/covalent nature of the metal-ligand bond in the prepared glasses with the help of Nephelauxetic ratio (β) and bonding parameter (δ) studies. The optical band gap of direct and indirect allowed transitions were determined from Tauc's plot and the variations of band gap energy with structural arrangements were discussed. The Urbach energy values were determined and the relatively lower values of the Urbach's energy reveal the minimal degree of disorderness in the prepared glasses. The oscillator strengths (fexp and fcal) and Judd-Ofelt (JO) intensity parameters (Ω2, Ω4 and Ω6) were calculated with the application of JO theory and the trends of the JO intensity parameters are found to be Ω2>Ω6>Ω4 for all the prepared glasses with a minimum variation in Ω2 intensity parameter values. A bright green emission was observed from the (2)H11/2+(4)S3/2→ (4)I15/2 transition and the radiative properties such as transition probability (A), stimulated emission cross-section (σP(E)), branching ratio (βr) and radiative lifetime (τ) were calculated using the JO parameters. The suitability of the prepared glasses for the fabrication of photonic devices were also discussed and reported in the present work.
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Affiliation(s)
- K Annapoorani
- Department of Physics, Gandhigram Rural University, Gandhigram 624 302, India
| | - K Maheshvaran
- Department of Physics, K.S.Rangasamy, College of Technology, Trichengode 637 215, India
| | - S Arunkumar
- Department of Physics, Gandhigram Rural University, Gandhigram 624 302, India
| | - N Suriya Murthy
- Radiological Safety Division, IGCAR, Kalpakkam 603 102, India
| | - K Marimuthu
- Department of Physics, Gandhigram Rural University, Gandhigram 624 302, India.
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50
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Balaji S, Biswas K, Sontakke AD, Gupta G, Ghosh D, Annapurna K. Al2O3 influence on structural, elastic, thermal properties of Yb(3+) doped Ba-La-tellurite glass: evidence of reduction in self-radiation trapping at 1μm emission. Spectrochim Acta A Mol Biomol Spectrosc 2014; 133:318-325. [PMID: 24954756 DOI: 10.1016/j.saa.2014.04.113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 04/16/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
Ba-La-tellurite glasses doped with Yb(3+) ions have been prepared through melt quenching technique by modifying their composition with the inclusion of varied concentration of Al2O3 to elucidate its effects on glass structural, elastic, thermal properties and Yb(3+) ion NIR luminescence performance. The FTIR spectral analysis indicates Al2O3 addition is promoting the conversion of BOs from NBOs which have been generated during the process of depolymerisation of main glass forming TeO4 units. The elastic properties of the glass revealed an improved rigidity of the glass network on addition of Al2O3. In concurrence to this, differential thermal analysis showed an increase in glass transition temperature with improved thermal stability factor. Also, Yb(3+) fluorescence dynamics demonstrated that, Al2O3 inclusion helps in restraining the detrimental radiation trapping of ∼1μm emission.
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Affiliation(s)
- S Balaji
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India.
| | - K Biswas
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - A D Sontakke
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - G Gupta
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - D Ghosh
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India
| | - K Annapurna
- CSIR - Network of Institute for Solar Energy (NISE), Glass Science and Technology Section, CSIR - Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700 032, India.
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