Showing 1,781 - 1,800 results of 4,095 for search '"spectroscopy"', query time: 0.09s Refine Results
  1. 1781

    Characterization of Calcium Compounds in Opuntia ficus indica as a Source of Calcium for Human Diet by Isela Rojas-Molina, Elsa Gutiérrez-Cortez, Moustapha Bah, Alejandra Rojas-Molina, César Ibarra-Alvarado, Eric Rivera-Muñoz, Alicia del Real, Ma. de los Angeles Aguilera-Barreiro

    Published 2015-01-01
    “…The characterization of calcium compounds was performed by using Scanning Electron Microscopy, Energy Dispersive Spectrometry, X-ray diffraction, and infrared spectroscopy. Atomic Absorption Spectroscopy and titrimetric methods were used for quantification of total calcium and calcium compounds. …”
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  2. 1782

    Pyrolysis-catalytic gasification of plastic waste for hydrogen-rich syngas production with hybrid-functional Ni-CaOCa2SiO4 catalyst by Tian Heng Qin, Guozhao Ji, Boyu Qu, Alan J McCue, Shaoliang Guan, Jos Derksen, Ye Shui Zhang

    Published 2025-03-01
    “…The catalysts were analysed by N2 physisorption, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Temperature-programmed reduction (TPR) and in-situ Transmission Electron Microscopy (TEM). …”
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  3. 1783

    Antimicrobial Potential of Secalonic Acids from Arctic-Derived <i>Penicillium chrysogenum</i> INA 01369 by Yulia A. Roshka, Natalia N. Markelova, Sofia D. Mashkova, Kseniya V. Malysheva, Marina L. Georgieva, Igor B. Levshin, Vladimir I. Polshakov, Alexander M. Arutyunian, Alexey S. Vasilchenko, Vera S. Sadykova

    Published 2025-01-01
    “…The absolute configurations of these stereoisomers have been determined through conformational NMR analysis and circular dichroism spectroscopy. The antimicrobial activity of secalonic acids D and F has been evaluated against a diverse range of microorganisms, including Gram-positive multidrug-resistant <i>Staphylococcus aureus</i>, Gram-negative <i>Escherichia coli</i> ATCC 25922, <i>Pseudomonas aeruginosa</i> ATCC 27853, the phytopathogen <i>Pectobacterium carotovorum</i> VKM-B1247, and the fungi <i>Fusarium oxysporum</i> VKPM F 890, <i>Aspergillus fumigatus</i> VKM F-37, and <i>A. niger</i> ATCC 16404. …”
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  4. 1784

    A combined model of shoot phosphorus uptake based on sparse data and active learning algorithm by Tianli Wang, Yi Zhang, Haiyan Liu, Fei Li, Dayong Guo, Ning Cao, Yubin Zhang

    Published 2025-01-01
    “…Results show that (1) the prediction accuracy of the combined prediction model has been greatly improved compared with simple empirical prediction models, with accuracy test results of R2 = 0.87, root mean square error = 2.39 kg/ha, and relative percentage difference = 2.71. (2) In performance tests with different sample sizes, two-dimensional correlation spectroscopy i.e., first-order differentially enhanced two-dimensional correlation spectroscopy (1Der-2DCOS) and two-trace 2DCOS of enhanced filling and milk stages (filling-milk-2T2DCOS)) can effectively and robustly extract spectral trait relationships, with good robustness, and can achieve efficient prediction based on small samples. (3) The hybrid model constrained by the Newton-Raphson-based optimizer’s active learning method can effectively filter localized simulation data and achieve localization of simulation data in different regions when solving practical problems, improving the hybrid model’s prediction accuracy. …”
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  5. 1785

    Coloration and functionalization of organic cotton fabric using Chinese fringe leaf extraction: A greener approach by Md Shazzat Hossain, Mohammad Ullah, Rony Mia, Mohammed A. Assiri, Yahui Zhou, Haroon A.M. Saeed, Sakil Mahmud

    Published 2025-03-01
    “…Spectroscopic analyses, including UV−visible (UV−vis) spectroscopy and Fourier transform infrared spectroscopy (FTIR), confirmed the presence of flavonoid compounds as the key bio−colorants in the dye solution. …”
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  6. 1786
  7. 1787

    Manganese metal organic frame work assisted magnetic ionic liquid single crystal by Naima Sharmin, Md. Jahidul Islam

    Published 2025-06-01
    “…This article reports the synthetic procedure and structural elucidation of this MOFIL compound (2) along with its precursors (A and B) and intermediate (1) compound by Fourier Transform Infra-Red (FTIR) spectroscopy, Ultraviolet- Visible (UV- Vis) spectroscopy, and single crystal X-ray crystallography. …”
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  8. 1788

    Dynamically Cyclic Fe2+/Fe3+ Active Sites as Electron and Proton-Feeding Centers Boosting CO2 Photoreduction Powered by Benzyl Alcohol Oxidation by Ben Lei, Gaofeng Zhou, Zhongyou Gong, Chao Liu, Ying Zhou, Vitaliy P. Guro, Yanjuan Sun, Jianping Sheng, Fan Dong

    Published 2025-01-01
    “…More importantly, in situ attenuated total reflection Fourier transform infrared spectroscopy and gas chromatography–mass spectrometry spectroscopy, with isotope labeling of Deuteron-benzyl alcohol and 13CO2, confirmed that proton transfer from the hydroxyl group generates reactive protons at the Fe2+/Fe3+ site, enabling efficient CO2 photoreduction through subsequent protonation steps. …”
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  9. 1789

    Mechanistic switch in corrosion behavior of magnesium alloy diamond lattice structures induced by argon plasma treatment by Viviana M. Posada, Alexandru Marin, Tonny Naranjo, Juan Ramírez, Patricia Fernández-Morales

    Published 2025-01-01
    “…X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) confirmed the presence of a stable, protective layer composed of magnesium oxide, magnesium hydroxide, and magnesium carbonate on the DPNS-treated surfaces. …”
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  10. 1790

    Esophageal oxyhemoglobin saturation as a resuscitative metric in hemorrhagic shock by Julia Garcia Mancebo, Kristen Sack, Padraic Romfh, Yifeng Peng, John Kheir

    Published 2024-11-01
    “…Non-invasive methods, including near-infrared spectroscopy, have demonstrated low sensitivity to tissue dysoxia.Methods We fabricated a new device that uses resonance Raman spectroscopy (RRS) to quantify oxyhemoglobin saturation (ShbO2) in the esophagus (eShbO2), tongue (tShbO2), and liver (hShbO2). …”
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  11. 1791

    Biosynthesis of a range of ZnO nanoparticles utilising Salvia hispanica L. seed extract and evaluation of their bioactivity by Kiran Singh, Shweta Yadav

    Published 2025-02-01
    “…The synthesized NPs were evaluated using UV-Vis spectroscopy, FTIR spectroscopy, XRD, SEM, EDX, TEM, SAED, and HR-TEM methods to determine their characteristics. …”
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  12. 1792

    Synthetic Approaches Toward Phosphorus-Containing BODIPY and Squaraine Dyes: Enhancing Versatility of Small-Molecule Fluorophores by Jeanne M. Favret, Sergei V. Dzyuba

    Published 2024-12-01
    “…By leveraging the tunable nature of phosphorus-containing moieties, these dyes hold immense promise for addressing current challenges in spectroscopy, imaging, and material designs while unlocking new opportunities for advanced functional systems in chemistry, biology, and medicine.…”
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  13. 1793

    Neuroimaging and electrophysiology evidence unveiling the mystery of disorders of consciousness by BAI Yang

    Published 2024-01-01
    “…Among them, neuroimaging techniques, including positron emission tomography (PET), functional magnetic resonance imaging (fMRI), and functional near-infrared spectroscopy (fNIRS), as well as electrophysiological techniques, including spontaneous electroencephalograms (EEG), event-related potentials (ERPs), and transcranial magnetic stimulation-induced electroencephalograms (TMS-EEG), have provided different dimensional features related to consciousness. …”
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  14. 1794

    Microwave Irradiation of Nanohydroxyapatite from Chicken Eggshells and Duck Eggshells by Nor Adzliana Sajahan, Wan Mohd Azhar Wan Ibrahim

    Published 2014-01-01
    “…Sample characterization was done using by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM).…”
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  15. 1795

    DNA Binding and Cleavage Activity of Binuclear Metal Complexes with Benzil-α-Monoxime Thiosemicarbzone by M. S. Surendra Babu, T. B. Patrudu, K. Hussain Reddy

    Published 2011-01-01
    “…Transition metal complexes of copper(II), nickel(II), cobalt(II) and iron(II) with benzil-α-monoxime thiosemicarbazone (BMOT) have been synthesized and characterized by molar conductance, magnetic moments, IR, electronic and ESR spectroscopy. Electrochemical behaviors of these complexes were investigated by cyclic voltammetric studies. …”
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  16. 1796

    Synthesis, Characterization and Copolymerization of N-(phenylamino)maleimide with MMA by B. L. Hiran, S. N. Paliwal, Jyoti Choudhary, P. R. Choudhary

    Published 2007-01-01
    “…Resulting copolymer was characterized by density measurement, intrinsic viscosity, solubility, FT-IR & 1H NMR spectroscopy. Effect of the solvent and time on copolymer yield was also investigated. …”
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  17. 1797

    NMR and MD Simulations of Non-Ionic Surfactants by Gerd Buntkowsky, Markus Hoffmann

    Published 2025-01-01
    “…In recent years, the combination of molecular dynamics (MD) simulations with multinuclear solid-state NMR spectroscopy and calorimetric techniques has evolved into the most powerful tool for their investigation. …”
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  18. 1798

    Fast and Efficient Method for Imination of N-Aminorhodanine Using Inorganic Solid Support under Microwave Irradiation and Classical Heating by Masoumeh Tabatabaee, Majid M. Heravi, Mahboubeh Sharif, Fatemeh Esfandiyari

    Published 2011-01-01
    “…All the compounds have been characterized by elemental analyses, NMR and IR spectroscopy. Results indicate that treatment of N-aminorhodanine with aldehydes in acetonitrile as solvent or under solventless system led to the corresponding imines (2a-2e), while reactions were performed in solvent such as methanol 3a-3e was formed as products of ring cleavage and imination.…”
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  19. 1799

    Graft Copolymerization of Styrene from Poly(vinyl alcohol) via RAFT Process by Gholam Ali Koohmareh, Morteza Hajian, Hazhir Fallahi

    Published 2011-01-01
    “…The structure of compounds was confirmed by FT-IR and 1HNMR spectroscopy. The graft copolymer was characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). …”
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  20. 1800

    Synthesis, characterization and adsorption studies of an acrylic acid-grafted sodium alginate-based TiO hydrogel nanocomposite by Sourbh Thakur, Omotayo Arotiba

    Published 2018-02-01
    “…The structure and morphology of the nanocomposites were investigated using X-Ray Diffraction (XRD), Fourier Transform Infra-Red Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) and thermogravimetric analysis techniques. …”
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