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78561
Synthesis of ISO grade 46 and 68 biolubricant from palm kernel fatty acids
Published 2022“…The chemical structures of synthesized Palm kernel fatty acids-based biolubricants were characterized and confirmed using FTIR, NMR (1 H and 13C) spectroscopies, and GC-FID chromatography. The FTIR spectra of palm kernel fatty acids-based biolubricants products clearly showed the peaks of C=O and C–O of the ester group at 1741-1740 cm-1 and 1234-1152 cm-1, respectively. …”
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78562
Photoluminescent properties of TIO2 nanostructures prepared by hydrothermal method
Published 2013“…The obtained powders were characterized by FTIR and photoluminescence (PL) spectroscopies, XRD, EDX, SEM,and VSM. Characterization by SEM confirmed that the samples are well crystalline nanostructure. …”
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Thesis -
78563
Phytochemicals and bioactivities of Artocarpus Lanceifolius roxb and Artocarpus Maingayi king
Published 2011“…Structures of all compounds were elucidated spectroscopically by Nuclear Magnetic Resonance, Infrared, Ultraviolet Spectroscopies and Mass Spectrometry. Biological activities were carried out on the crude extracts and pure compounds. …”
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Thesis -
78564
Phytochemical and biological studies of Tibouchina Semidecandra L
Published 2008“…The structures of all compounds were established based on spectral studies using nuclear magnetic resonance, infrared and ultraviolet spectroscopies as well as mass spectrometry. Evaluation of the antioxidative activity on the crude extracts and pure compounds by electron spin resonance (ESR) and ultraviolet-visible (UV-vis) spectrophotometric assays showed that the pure isolated flavonoids and the EtOAc extract of the leaves possessed strong antioxidative capabilities. …”
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Thesis -
78565
Synthesis and bioassay studies of cationic porphyrins for gene transfection delivery
Published 2013“…All of the compounds were characterized using 1H-NMR, 13C-NMR, ultraviolet (UV) and infrared(IR) spectroscopies.Cytotoxicity and cellular uptake of all cationic compounds were tested on Chinese Hamster Ovary (CHO) cells to evaluate their potential uses as gene carriers. …”
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Thesis -
78566
Synthesis and antioxidant activities of hydroxylated coumarinyl chalcones
Published 2016“…The structures of the synthetic compounds were confirmed by spectroscopic techniques which includes the Infrared (IR) and Nuclear Magnetic Resonance (NMR) (1H, 13C and DEPT) Spectroscopies. The antioxidant activities of all synthesized compounds were evaluated using three antioxidant assays known as the 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and Ferric Reducing Ability of Plasma (FRAP) assays using the Bio-Tek Epoch microplate reader. …”
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Thesis -
78567
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78568
Revealing the competing contributions of charge carriers, excitons, and defects to the non-equilibrium optical properties of ZnO
Published 2019-05-01“…Here, a complementary set of time-resolved spectroscopies is applied to two ZnO samples of different defect density to disentangle the competing contributions of charge carriers, excitons, and defects to the nonequilibrium dynamics after photoexcitation: time-resolved photoluminescence, excited state transmission, and electronic sum-frequency generation. …”
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78569
Characterization of saturation of CR-39 detector at high alpha-particle fluence
Published 2018-04-01“…Keywords: Alpha Particle, Bulk Etch Rate, CR-39 Detector, Saturated Regime, UV–Vis Spectroscopy…”
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78570
Diamonds from the Mir Pipe (Yakutia): Spectroscopic Features and Annealing Studies
Published 2021-03-01“…For this study, 21 samples of colorless octahedral diamonds (weighing 5.4–55.0 mg) from the Mir pipe (Yakutia) were investigated with photoluminescence (PL), infrared (IR), and electron paramagnetic resonance (EPR) spectroscopies. Based on the IR data, three groups of diamonds belonging to types IIa, IaAB, and IaB were selected and their spectroscopic features were analyzed in detail. …”
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78571
Water of Increased Content of Molecular Oxygen
Published 2020-09-01“…Physical and physicochemical properties of the resulting liquids were characterized, involving pH, conductivity, density, dissolved molecular oxygen, active oxygen content, differential scanning calorimetry (DSC), ultraviolet-visible (UV-VIS), Fourier transformation infrared-attenuated total reflectance (FTIR-ATR), electronic spin resonance (ESR), and Raman spectroscopies. Tap WST treated with LPGP for 30 min contained the highest level of dissolved molecular oxygen, compared to original non-treated tap water (23 and 15 mg/L, respectively). …”
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78572
Structural Peculiarities of Natural Ballas—Spheroidal Variety of Polycrystalline Diamond
Published 2023-04-01“…Point and extended defects were examined on polished central plates using infra-red, photo- and cathodoluminescence spectroscopies, and electron back-scattering diffraction; information about nanosized inclusions was inferred from Transmission Electron Microscopy. …”
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78573
Oxygen Aspects in the High-Pressure and High-Temperature Sintering of Semiconductor Kesterite Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanopowders Prepared by a Mechanochemically-Assisted S...
Published 2023-02-01“…Both the nanopowders and pellets were extensively characterized, employing such determinations as powder XRD, UV-Vis/FT-IR/Raman spectroscopies, solid-state <sup>65</sup>Cu/<sup>119</sup>Sn NMR, TGA/DTA/MS, directly analyzed oxygen (O) and hydrogen (H) contents, BET specific surface area, helium density, and Vicker’s hardness (when applicable). …”
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78574
Spectroscopic and Computational Study of the Protonation Equilibria of Amino-Substituted benzo[<i>b</i>]thieno[2,3-<i>b</i>]pyrido[1,2-<i>a</i>]benzimidazoles as Novel pH-Sensing M...
Published 2022-01-01“…The latter were investigated by UV-Vis absorption and fluorescence spectroscopies and interpreted by DFT calculations. An excellent agreement in experimentally measured and computationally determined p<i>K</i><sub>a</sub> values and electronic excitations suggests that all systems are unionized at neutral pH, while their transition to monocationic forms occurs at pH values between 3 and 5, accompanied by substantial changes in spectroscopic responses that make them suitable for detecting acidic conditions in solutions. …”
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78575
Trinodal Self-Penetrating Nets from Reactions of 1,4-Bis(alkoxy)-2,5-bis(3,2’:6’,3’’-terpyridin-4’-yl)benzene Ligands with Cobalt(II) Thiocyanate
Published 2019-10-01“…The tetratopic ligands 1,4-bis(2-ethylbutoxy)-2,5-bis(3,2’:6’,3’’-terpyridin-4’-yl)benzene (<b>1</b>) and 1,4-bis(3-methylbutoxy)-2,5-bis(3,2’:6’,3’’-terpyridin-4’-yl)benzene (<b>2</b>) have been prepared and characterized by <sup>1</sup>H and <sup>13</sup>C{<sup>1</sup>H} NMR, IR, and absorption spectroscopies and mass spectrometry. Reactions of <b>1</b> and <b>2</b> with cobalt(II) thiocyanate under conditions of crystal growth at room temperature result in the formation of [{Co(<b>1</b>)(NCS)<sub>2</sub>}·MeOH·3CHCl<sub>3</sub>]<i><sub>n</sub></i> and [{Co(<b>2</b>)(NCS)<sub>2</sub>}·0.8MeOH·1.8CHCl<sub>3</sub>]<i><sub>n</sub></i>. …”
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78576
First synthesis of 2D materials by hypergolic reactions and evaluation of their dispersions for ink formulation: hexagonal boron nitride and fluorinated carbon nanosheets
Published 2024-01-01“…Structural and chemical features were confirmed with x-ray diffraction, infrared, Raman, XPS spectroscopies and N _2 porosimetry measurements. Electron microscopy (SEM and TEM) along with atomic force microscopy (AFM) were used to characterize the morphology of the materials. …”
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78577
Opening a Band Gap in Biphenylene Monolayer via Strain: A First-Principles Study
Published 2023-05-01“…For phonon dispersion, we discovered that the Raman-active <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi mathvariant="normal">A</mi><mi mathvariant="normal">g</mi><mn>3</mn></msubsup></mrow></semantics></math></inline-formula> phonon mode shows a robust single phonon mode character under both compressive and tensile strain, but its frequency is sensitive to lattice strain, suggesting the lattice strain in biphenylene can be identified by Raman spectroscopy…”
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78578
Effects of sintering condition on giant dielectric and nonlinear current-voltage properties of Na1/2Y1/2Cu3Ti3.975Ta0.025O12 ceramics
Published 2023-01-01“…Insulating grain boundaries (i–GBs) and semiconducting grains (semi–Gs) were studied at different temperatures using impedance and admittance spectroscopies. The conduction activation energies of the semi–Gs and i–GBs were Eg ≈ 0.1 and Egb ≈ 0.6 eV, respectively. …”
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78579
Detection of Water Contaminants by Organic Transistors as Gas Sensors in a Bottom-Gate/Bottom-Contact Cross-Linked Structure
Published 2023-09-01“…In this work, the cross-linking was demonstrated using FTIR and Raman spectroscopies, as well as high-k capacitors with a dielectric constant of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>5.3</mn></mrow></semantics></math></inline-formula>. …”
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78580
One-Pot Synthesis of TiO<sub>2</sub>-rGO Photocatalysts for the Degradation of Groundwater Pollutants
Published 2021-10-01“…The structural, optical, and textural properties of the composites, determined by Raman, Photoluminescence, Fourier Transform InfraRed (FTIR), UV-vis diffuse reflectance (DRS) spectroscopies, and N<sub>2</sub> absorption-desorption measurements, showed as the solar irradiation favors the reduction of graphene oxide with higher efficiency compared to the thermal-driven synthesis. …”
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