Showing 3,761 - 3,780 results of 4,095 for search '"spectroscopy"', query time: 0.12s Refine Results
  1. 3761

    Effectiveness of three biomimetic remineralization procedures in artificial caries-affected dentin – an in-vitro pilot study by Rosário Costa, Sofia Arantes-Oliveira, Lisete Fernandes, Fábio G. Figueiras, João Cardoso Ferreira, Paulo Ribeiro de Melo

    Published 2024-12-01
    “…Half of each group’s samples were analyzed using field-emission gun environmental scanning electron microscope/energy dispersive X-ray, while the other half were analyzed by X-ray diffraction and micro-Raman spectroscopy. Results: Results demonstrate alterations in dentin morphology and structure induced by the ACAD protocols, affirming their effectiveness in mimicking caries-affected dentin. …”
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  2. 3762

    Synthesis and Characterization of Modified Kaolin-Bentonite Composites for Enhanced Fluoride Removal from Drinking Water by Ebenezer Annan, Emmanuel Nyankson, Benjamin Agyei-Tuffour, Stephen Kofi Armah, George Nkrumah-Buandoh, Joanna Aba Modupeh Hodasi, Michael Oteng-Peprah

    Published 2021-01-01
    “…The adsorbents were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) formulation, and Brunauer–Emmett–Teller (BET), whereas the adsorption mechanism and the kinetics were explained using the Langmuir isotherm, Freundlich models, and pseudo-first-order and pseudo-second-order models. …”
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  3. 3763

    Moisture Sorption by Low‐Cost Pyridinium‐Based Protic Ionic Liquids: Kinetics and Physico‐Electrochemical Properties by Sayyar Muhammad, Najia, Zarshad Ali, Samina Aziz, Muhammad Hammad Khan, Maroosh Iqbal, Umair Hassan, Jalal Khan, Asad Ali

    Published 2025-01-01
    “…The PILs were synthesized by the reaction of pyridine base with an acid, H2SO4, under solventless conditions, and confirmed by FTIR spectroscopy and 1H NMR spectra. The appearance vibration bands in the 3095–3252 cm−1 range for −NH+ stretching in the FTIR spectra and a peak at a chemical shift of 8.439 ppm in the 1H‐NMR of the liquids confirm their synthesis as no such bands/peaks can be seen in that of the pure pyridine spectra. …”
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  4. 3764

    Hydrogen-rich syngas production through partial oxidation of methane over Ni-promoted molecular sieves: Impact of reducibility and surface area by Salma A. Al-Zahrani, Rawesh Kumar, Mohammed F. Alotibi, Sahar Y. Rajeh, Najat Masood, Hessah Difallah A Al-Enazy, Ahmed S. Al-Fatesh

    Published 2025-03-01
    “…Catalysts are characterized by X-ray diffraction, surface area-porosity, temperature programmed studies, thermogravimetry analysis, transmission electron microscopy and X-ray photo electron spectroscopy. The stability of major active sites (metallic Ni) under oxidizing gas (O2 and CO2) is checked by Cyclic H2TPR-CO2TPD-H2TPR and Cyclic H2TPR-O2TPOH2TPR experiment where metallic Ni was found more susceptible to oxidize under oxygen. …”
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  5. 3765

    Molecular Mechanism of Local Drug Delivery with Paclitaxel-Eluting Membranes in Biliary and Pancreatic Cancer: New Application for an Old Drug by Sookhee Bang, Sung Ill Jang, Su Yeon Lee, Yi-Yong Baek, Jieun Yun, Soo Jin Oh, Chang Woo Lee, Eun Ae Jo, Kun Na, Sugeun Yang, Don Haeng Lee, Dong Ki Lee

    Published 2015-01-01
    “…The quantities of paclitaxel released into the tumor and plasma were determined by liquid chromatography-tandem mass spectroscopy. Paclitaxel from the PEM and its diffusion into the tumor inhibited angiogenesis, which involved suppression of mammalian target of rapamycin (mTOR) through regulation of hypoxia inducible factor (HIF-1) and increased apoptosis. …”
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  6. 3766

    Improving the Interfacial Bond Properties of the Carbon Fiber Coated with a Nano-SiO2 Particle in a Cement Paste Matrix by Gwang-Hee Heo, Jong-Gun Park, Ki-Chang Song, Jong-Ho Park, Hyung-Min Jun

    Published 2020-01-01
    “…To verify whether a nano-SiO2 particle was effectively modified on the surface of the carbon fiber, the surface morphology, chemical composition, and chemical structure were characterized and analyzed by several techniques such as the scanning electron microscope (SEM), energy-dispersive spectrometer (EDS), and Fourier-transform infrared spectroscopy (FT-IR). Nano-SiO2 particles were entirely covered and uniformly distributed on the surface of the carbon fiber, resulting in the formation of a thin layer of nano-SiO2 particles. …”
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  7. 3767

    Evolution of local heterogeneity towards flat free energy landscape: Optimization of piezoelectric response in PNN-PZ-PT at morphotropic phase boundary by Shubham Modgil, Varun Kamboj, Mukul Kumar, Arun Kumar Singh, Shobhna Dhiman, Gyaneshwar Sharma, OP Thakur, Sanjeev Kumar

    Published 2025-06-01
    “…The effect of Sm3+doping on the structure, microstructure, dielectric, ferroelectric and piezoelectric properties of 0.55Pb(Ni1/3Nb2/3)O3–0.135PbZrO3–0.315PbTiO3 were investigated. Dielectric spectroscopy and order parameter analysis collectively reveal that the free energy landscape of morphotropic phase boundary is further softened via local structural heterogeneity, enabled via rare earth doping. …”
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  8. 3768

    The effect of molecular structure of chlorin photosensitizers on photo-bleaching of 1,3-diphenylisobenzofuran—the possible evidence of iodine reactive species formation by Kustov, Andrey, Morshnev, Philipp, Kukushkina, Natal’ya, Krestyaninov, Mikhail, Smirnova, Nataliya, Berezin, Dmitry, Kokurina, Galina, Belykh, Dmitry

    Published 2022-03-01
    “…The $\Phi _{\Delta }$ values of four PSs with one or two cationic groups occupying opposite positions in the macrocycle are equal to 0.6, which is nearly identical to the values obtained by the time-resolved fluorescence spectroscopy method. In contrast, three PSs containing a 3(1),3(2)-bis-(N,N,N-trimethylaminomethylvinyl) iodide fragment with two adjacent cationic groups have an abnormally high quantum yield reaching 0.8. …”
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  9. 3769

    Ultrasonic-assisted adsorption of methylene blue using shrimp shells as a low-cost adsorbent: Evaluation on the adsorption isotherm, kinetics, and thermodynamics by Erni Misran, Wahyu Pratama, Kanzi Insan Kasyidi Napitupulu, Muhammad Dani Supardan, Dewi Agustina Iryani, Viqry Pramananda

    Published 2025-04-01
    “…The results indicated that the preparation method significantly influenced the characteristics of each adsorbent, as validated by Scanning Electron Microscope-Energy Dispersive X-Ray Spectroscopy, Fourier Transform InfraRed, Particle Size Analyzer, and Surface Area Analyzer. …”
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  10. 3770

    Synthesis and characteristics of Fe/Ni/Cr oxide nanoparticles/PLA hybrid composite coatings on Mg–Zn–Ca alloy by Prakash Kumar, Aditya Kudva S, AnilKumar T, Ramesh S, M.R. Ramesh, Ashwini Prabhu, Gajanan Anne

    Published 2025-03-01
    “…These composite coatings were evaluated for their morphological and optical characteristics using a scanning electron microscope (SEM), 3-D non-contact profilometer, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The corrosion characteristics of developed samples were measured by electrochemical corrosion in standard simulation body fluid (SBF) at 37 °C. …”
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  11. 3771
  12. 3772

    Evaluation of Chemical, Functional, Spectral, and Thermal Characteristics of Sargassum wightii and Ulva rigida from Indian Coast by Yogesh Kumar, Ayon Tarafdar, Deepak Kumar, Kiran Verma, Manjeet Aggarwal, Prarabdh C. Badgujar

    Published 2021-01-01
    “…TGA of S. wightii and U. rigida showed degradation temperature within the range of 200–300°C due to divergent polysaccharide compositions. FTIR spectroscopy suggested the presence of phenolic groups in both seaweeds (at 1219 cm−1). …”
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  13. 3773

    Goat’s Milk Powder Enriched with Red (<i>Lycium barbarum</i> L.) and Black (<i>Lycium ruthenicum</i> Murray) Goji Berry Extracts: Chemical Characterization, Antioxidant Properties,... by Danijel D. Milinčić, Aleksandar Ž. Kostić, Steva Lević, Uroš M. Gašić, Dragana D. Božić, Relja Suručić, Tijana D. Ilić, Viktor A. Nedović, Bojana B. Vidović, Mirjana B. Pešić

    Published 2024-12-01
    “…Proximate analysis, ultra-high performance liquid chromatography with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS), Fourier transform infrared spectroscopy using attenuated total reflection (FTIR-ATR), and electrophoretic analysis were assessed. …”
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  14. 3774

    Combined real-time fMRI and real time fNIRS brain computer interface (BCI): Training of volitional wrist extension after stroke, a case series pilot study. by Avi K Matarasso, Jake D Rieke, Keith White, M Minhal Yusufali, Janis J Daly

    Published 2021-01-01
    “…<h4>Objective</h4>Pilot testing of real time functional magnetic resonance imaging (rt-fMRI) and real time functional near infrared spectroscopy (rt-fNIRS) as brain computer interface (BCI) neural feedback systems combined with motor learning for motor recovery in chronic severely impaired stroke survivors.…”
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  15. 3775

    Computational and experimental exploration of morpholine pendent 2-hydrazineyl thiazole: Insights from DFT, ADME profiling, antifungal efficacy and molecular docking analyses by Vishnu A. Adole, I.Antony Danish, J.Jebasingh Kores, J.Winfred Jebaraj, S. Janani, Suresh K. Ghotekar, Rakesh D. Amrutkar

    Published 2025-01-01
    “…The functional groups in titled compound were identified using infrared spectroscopy (IR). Chemical shifts were precisely assigned using Nuclear Magnetic Resonance (NMR) analysis. …”
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  16. 3776

    Halloysite nanotubes as delivery mechanism for feather protein-based multi-surfactant systems in crude oil dispersion application by Yaw Kwakye Adofo, Emmanuel Nyankson, Benjamin Agyei-Tuffour, Selassie Gbogbo, Christian Amoako, Joseph Arko Morgan, Gloria Pokuaa Manu, Grace Karikari Arkorful

    Published 2025-01-01
    “…Chicken feather protein (CFP), and lecithin (L), Tween 80 (T), and DOSS (D) surfactant systems were loaded onto halloysite nanotubes (HNTs), a natural clay aluminosilicate product to form particulate dispersants at different surfactant concentrations and characterized by Fourier Transform Infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy coupled with EDS. …”
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  17. 3777

    Structure of a Sulfated Capsular Polysaccharide from the Marine Bacterium <i>Cobetia marina</i> KMM 1449 and a Genomic Insight into Its Biosynthesis by Maxim S. Kokoulin, Yulia V. Savicheva, Alina P. Filshtein, Ludmila A. Romanenko, Marina P. Isaeva

    Published 2025-01-01
    “…The CPS was isolated by saline solution, purified by a series of chromatographic procedures, and studied by chemical methods along with 1D and 2D <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy. The following new structure of the CPS from <i>C. marina</i> KMM 1449 was established and consisted of sulfated and simultaneously phosphorylated disaccharide repeating units: →4)-α-L-Rha<i>p</i>2S-(1→3)-β-D-Man<i>p</i>6PGro-(1→. …”
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  18. 3778

    Alginate-Based Hydrogels with Amniotic Membrane Stem Cells for Wound Dressing Application by Fitriani N, Wilar G, Narsa AC, Elamin KM, Wathoni N

    Published 2025-01-01
    “…The hydrogel was successfully formulated, as confirmed by characterization techniques including Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR) spectroscopy, Differential Scanning Calorimetry (DSC), Cytotoxicity Studies, TGF-β 1 Level Measurement by ELISA, and Cell Scratch Wound Assay.Results: Cryo-EM characterization of the Alg-H preparation successfully demonstrated the encapsulation of MSCs. …”
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  19. 3779

    Multimessenger Probes of Supermassive Black Hole Spin Evolution by Angelo Ricarte, Priyamvada Natarajan, Ramesh Narayan, Daniel C. M. Palumbo

    Published 2025-01-01
    “…We compare several variations of our model with compiled black hole (BH) spin measurements derived from X-ray reflection spectroscopy, correcting for a bias arising from the spin-dependent radiative efficiency of accretion flows. …”
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  20. 3780

    Effects of transcranial magnetic stimulation combined with extracorporeal shockwave therapy for poststroke spasticity: study protocol for a randomised controlled trial by Man Yang, Lu Liu, Peng-Yu Wang, Yang Zhu, Ling-Yi Liao, Qiu-Yi Peng, Yong Tao, Jin-Jing Liu, Xiang-Qin Fang, Shi-Hao Gao, Chang-Yue Gao

    Published 2025-01-01
    “…The secondary outcomes include the modified Tardieu scale for the degree of spasticity, the Fugl-Meyer assessment scale and range of motion (ROM) for motor function, the stroke-specific quality of life scale (SS-QOL) and modified Barthel index for activities of life, cortical excitability measured by TMS–surface electromyography (EMG), cerebral cortex oxygen concentrations measured by functional near-infrared spectroscopy (fNIRS) and Hmax/Mmax ratio measured by EMG.Ethics and dissemination This study protocol was approved by the Ethics Committee of the Army Medical Center of PLA (Approval No. 2024-04) on 24 January 2024. …”
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