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2481
Dielectric Properties of the System GdCo 1-xFexO3 Synthesized by Chemical Route (x = 0.10, 0.20)
Published 2006-01-01“…It is observed that dielectric constant increases with increasing Fe2+ ions concentration. The frequency dependence of dielectric constant in these materials indicates that space charge polarization contributes significantly to their observed dielectric parameters. …”
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2482
Structural, Optical and Electrochromic Properties of Nanocrystalline TiO2 Thin Films Prepared by Spin Coating
Published 2004-01-01“…The transmission of the blue colored films decreased and their absorption edge was less sharp and shifted to higher wavelengths as a result of the intercalation of Li+ ions.…”
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2483
Nitric Acid-treated Bentonite Clay: A Novel Oxidation Supported Reagent
Published 1990-09-01“…The reactive species is believed to be nitrate ions present in the interlamellar species, together with an interlamellar acidic aluminium species which is useful in maintaining the crystallinity of the acid-washed clay. …”
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2484
Abnormal Capacitance Increasing at Elevated Temperature in Tantalum Capacitors with PEDOT:PSS Electrodes
Published 2018-01-01“…Capacitance-voltage measurement supposed that residual ions in the PEDOT:PSS dispersion caused an accumulation of charges at the dielectric-cathode interface which contributed to an increase in the dielectric constant and resulted in the capacitance increasing at high temperature. …”
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2485
Electrodeposition of tin from EMI⋅BF4⋅Cl room temperature molten salts
Published 2003-01-01“…The electrochemistry of Sn(II) was investigated with cyclic voltammetry and chronoamperometry in the 1-ethyl-3-methylimidazolium tetrafluoroborate molten salt containing free chloride ions (EMI ⋅BF4 ⋅Cl) originated from the mixture of EMIC and NaBF4 (60:40 mol%). …”
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2486
Mechanistic Pathways in Cyanide-Mediated Benzoin Condensation: A Comprehensive Electron Localisation Function (ELF) and Catastrophe Theory Analysis of the Umpolung Reaction
Published 2025-01-01“…The study achieves a comprehensive understanding of the evolution of chemical bonds and non-bonding electron density in the reaction of benzaldehyde and cyanide ions. The results reveal that the reaction proceeds through five transition state structures, with the formation of Lapworth’s cyanohydrin being the rate-determining step. …”
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2487
Kinetics and Mechanism of Oxidation of Isoleucine by N-Bromophthalimide in Aqueous Perchloric Acid Medium
Published 2011-01-01“…A decrease in the dielectric constant of the medium increases the rate. Addition of halide ions or acrylonitrile has no effect on the kinetics. …”
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2488
Synthesis and Crystal Structure Characterization of Zinc (II) Tetronic Acid Complexes
Published 2010-01-01“…The synthesis and characterization of two new tetronic acid zinc (II) complexes of the empirical formulae [Zn(L–H)2(H2O)2] (1) and [Zn(L–H)2(H2O)(MeOH)]H2O (2) found within the same crystal are reported. The zinc ions bind through alkoxide and carbonyl groups of the ligand 3-methoxycarbonyl-5-phenyl tetronic acid (LH) as indicated by H NMR and X-ray crystallographic studies. …”
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2489
Elements for a social history of american social sciences: A chronicle
Published 2023-12-01Get full text
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2490
A questão do trabalho: análise conceitual de uma variável fundamental na reprodução social
Published 2005-01-01Get full text
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2491
Studying regenerated soybean lines for their useful agronomic and biochemical characteristics
Published 2024-07-01“…The effect of heavy metal ions can cause ionic stress in plants – the problem of significant interest among researchers. …”
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2492
Efficacy of malic and tartaric acid in mitigation of cadmium stress in Spinacia oleracea L. via modulations in physiological and biochemical attributes
Published 2025-01-01“…These supplements also prevented excessive accumulation of Cd metal ions as indicated by lowered Cd metal contents in MA and TA treated plants. …”
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2493
Investigation of Hydro-Geochemical Characteristics of Groundwater In Port Harcourt City, Nigeria: Implication for Use and Vulnerability
Published 2013-05-01“…The analytical results present the abundance of the ions in the following order: Mg > Ca > Na > K = Cl > SO4 > HCO3 > NO3. …”
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2494
Deep eutectic solvent-assisted carbon quantum dots from biomass Triticum aestivum: A fluorescent sensor for nanomolar detection of dual analytes mercury (Ⅱ) and glutathione
Published 2025-01-01“…N,Cl-CQDs were used as sensing platform for the detection of Hg2+ ions and GSH with LOD value of 39 nM and 43 nM, respectively. …”
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2495
Investigation of Hydro-Geochemical Characteristics of Groundwater In Port Harcourt City, Nigeria: Implication for Use and Vulnerability
Published 2013-05-01“…The analytical results present the abundance of the ions in the following order: Mg > Ca > Na > K = Cl > SO4 > HCO3 > NO3. …”
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2496
Transparent Celadon with Phase-Separated Structure: Study on the Technological Characteristics and Coloring Mechanism of Celadons from the Lieshan Kiln
Published 2025-01-01“…Glaze coloration was modulated by the interaction of Fe<sup>3+</sup> and Fe<sup>2+</sup> ions, and chemical coloration by Fe ions prevailed when phase-separated particles were minute enough to avoid Rayleigh or Mie scattering. …”
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2497
Optimizing the gelation, structure, and thermal stability of alkali-induced duck egg white gels with calcium chloride
Published 2025-01-01“…The addition of calcium ions at appropriate concentrations enhances the gelation rate, structural integrity, and thermal stability of alkali-induced duck egg white gels and offers a safe and efficient method for utilizing surplus duck egg whites. …”
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2498
Identification of Pyrrolizidine Alkaloids in Senecio Plants by Liquid Chromatography-Mass Spectrometry
Published 2021-01-01“…Moreover, two product ions at m/z 120 and m/z 138 have been reported as the characteristic fragments of unsaturated PAs. …”
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2499
Resveratrol-Based Carbamates as Selective Butyrylcholinesterase Inhibitors: Design, Synthesis, Computational Study and Biometal Complexation Capability
Published 2025-01-01“…Some bioactive resveratrol-based carbamates displayed complex-forming capabilities with Fe<sup>3+</sup> ions as metal centers. Spectrophotometric investigation indicated that they coordinate one or two metal ions, which is in accordance with their chemical structure, offering two binding sites: an amine and a carboxylic group in the carbamate moiety. …”
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2500
COMPLEX FOR ELEMENTAL ANALYSIS OF SUBSURFACE LAYERS WITH NANOMETER DEPTH RESOLUTION
Published 2015-04-01“…A measuring complex for quantitative analysis of element contents and distributions of doping atoms in subsurface layers of crystals as well as in thin films by means of the registration of energy spectra of ions scattered to angles higher than π/2 has been designed and fabricated. …”
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