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1581
Characterization of Jamaican Delonix regia and Cassia fistula Seed Extracts
Published 2016-01-01“…Zinc concentration was determined by atomic absorption spectroscopy. Extracts from the seeds of C. fistula had a higher antioxidant activity, free radical scavenging activity, and phenolic content than D. regia. …”
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1582
Second harmonic generation from bound-state in the continuum-hosted few-layers van der Waals metasurface
Published 2025-01-01“…The metasurface sustains BIC at different thickness of the meta-atoms, which is highly desired for maintaining the accuracy in fabrications. …”
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1583
Thiadiazoline- and Pyrazoline-Based Carboxamides and Carbothioamides: Synthesis and Inhibition against Nitric Oxide Synthase
Published 2018-01-01“…The structure-activity relationships of final molecules are discussed in terms of the R1 radical effects in the aromatic ring, the Y atom in the heterocyclic system, the X heteroatom in the main chain, and the R2 substituent in the carboxamide or carbothioamide rest. …”
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1584
Prediction of Gas Chromatography-Mass Spectrometry Retention Times of Pesticide Residues by Chemometrics Methods
Published 2013-01-01“…The six molecular descriptors that were considered to account for the effect of molecular structure on the retention time are number of nitrogen, Solvation connectivity index-chi 1, Balaban Y index, Moran autocorrelation-lag 2/weighted by atomic Sanderson electronegativity, total absolute charge, and radial distribution function-6.0/unweighted. …”
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1585
Numerical Investigation of Droplet Properties of a Liquid Jet in Supersonic Crossflow
Published 2021-01-01“…The atomization process of a liquid jet in supersonic crossflow with a Mach number of 1.94 was investigated numerically under the Eulerian-Lagrangian scheme. …”
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1586
Misfit Strain in Superlattices Controlling the Electron-Lattice Interaction via Microstrain in Active Layers
Published 2010-01-01“…Looking for unity in the diversity we find in all these materials a common lattice architecture: they are practical realizations of heterostructures at atomic limit made of superlattices of metallic active layers intercalated by spacers as predicted in 1993 by one of us. …”
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1587
Improving oxidation resistance property of single-crystal Ni-based superalloy via utilizing high temperature aging-induced dislocations
Published 2025-03-01“…Taking advantage of such dislocations, the sample aged exhibited an extremely low oxidation rate, and a protective α-Al2O3 layer formed rapidly at the surface instead of multilayer oxides without the aid of aging dislocations, determining the change in oxidation mechanism. The atomic-scale investigation revealed that the Al had a higher activity in aged specimens, and the dislocation from aging treatment enabled the pipe diffusion effect. …”
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1588
Electronic descriptors for designing high-entropy alloy electrocatalysts by leveraging local chemical environments
Published 2025-02-01“…Importantly, the local environmental electronegativity of the HEA surface is strongly related to the d-band profile of the center atom(s) embedded within. Finally, we establish a library of activity maps for HEAs encompassing nine noble-metal elements, suggesting that Pd-rich and Ir-rich alloys, such as Pd–Ag, Ir–Pt, Ir–Au compositions, hold promise as potential candidates for optimal electrocatalysts.…”
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1589
Improving mechanical properties and electrical conductivity of Al-Cu-Mg matrix composites by GNPs and sc additions
Published 2025-01-01“…These improvements can be primarily ascribed to the addition of Sc, which facilitated the precipitation of solute atoms and enhanced the interfacial bonding between the GNPs and the matrix, as well as the remarkable heterogeneous layered microstructure induced by the incorporation of GNPs. …”
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1590
Bottom-up fabrication of 2D Rydberg exciton arrays in cuprous oxide
Published 2025-01-01“…Cuprous oxide (Cu2O) has recently emerged as a promising medium for scalable quantum technology due to its high-lying Rydberg excitonic states, akin to those in hydrogen atoms. To harness these nonlinearities for quantum applications, the confinement dimensions must match the Rydberg blockade size, which can reach several microns in Cu2O. …”
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1591
AFM observation of protein translocation mediated by one unit of SecYEG-SecA complex
Published 2025-01-01“…Here, we visualize the translocation, via one unit of a SecYEG-SecA-embedded nanodisc, of an unfolded substrate protein by high-speed atomic force microscopy (HS-AFM). Additionally, the uniform unidirectional distribution of nanodiscs on a mica substrate enables the HS-AFM image data analysis, revealing dynamic structural changes in the polypeptide-crosslinking domain of SecA between wide-open and closed states depending on nucleotides. …”
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1592
Assessment of heavy metal pollution in seawater, benthic flora and fauna and their ability to survive under stressors along the northern Red Sea, Egypt
Published 2023-01-01“…The concentrations of heavy metals (Fe, Mn, Zn, Cu, Ni, Cd and Pb) were analysed with an atomic absorption spectrophotometer. The results revealed that the Fe levels in the seawater ranged from 7.86 and 27.95 μg l−1, while the Zn concentrations fell between 1.83 and 5.63 μg l−1. …”
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1593
Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components
Published 2015-01-01“…After the alkaline treatment, the electron-donor contribution (mainly due to the two remaining lone electron pairs of the oxygen atoms present in the zeolite extra frameworks) decreases and an increase of the electron-receptor contribution is observed and quantified. …”
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1594
Quality of Commercial Coffees: Heavy Metal and Ash Contents
Published 2018-01-01“…The ash content was determined by incineration of the samples, and the quantification of heavy metals was performed by flame atomic absorption spectrophotometry for the following metals: cadmium, lead, copper, chromium, nickel, and zinc. …”
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1595
Physicochemical, Major Anions and Heavy Metals in Surface Water and Groundwater at Pb – Zn Mining areas of Ebonyi State, Nigeria
Published 2018-08-01“…Heavy metals in borehole samples were analysed using Atomic Absorption Spectrometer (AAS). Physico-chemical parameters determined. …”
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1596
Safety Assessment of Low-Contaminated Equipment Dismantling at Nuclear Power Plants
Published 2015-01-01“…Existing safety standards require that an appropriate safety assessment be performed to support the decommissioning plan for each facility (International Atomic Energy Agency, 2006). This paper presents safety assessment approach used in Lithuania during the development of the first dismantling and decontamination project for Ignalina NPP. …”
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1597
Measurement of wettability and surface roughness for metrology and quality control in microfluidics
Published 2025-01-01“…To quantify surface roughness, atomic force microscopy and stylus profilometry measured area roughness parameter and profile roughness parameter for four samples of microfluidic surfaces. …”
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1598
Cooperative mechanisms of oxide ion conduction in tellurites with secondary bond interactions and Grotthuss-like processes
Published 2025-02-01“…This detailed investigation of the cooperative mechanism with similar Grotthuss process at the atomic scale provides a direction for optimization and discovering oxide ion conducting materials.…”
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1599
Simultaneous determination of inorganic ions in saline water from the Mekong Delta using ion chromatography
Published 2025-12-01“…The outcomes will be compared with those of reference methods, including Flame Atomic Absorption Spectrometry, Mohr Titration, and Turbidimetric Methods, revealing no significant differences in ion concentration determinations across six saline water backgrounds in Ben Tre province.…”
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1600
Sliding ferroelectric memories and synapses based on rhombohedral-stacked bilayer MoS2
Published 2024-12-01“…Abstract Recent advances have uncovered an exotic sliding ferroelectric mechanism, which endows to design atomically thin ferroelectrics from non-ferroelectric parent monolayers. …”
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