Showing 78,441 - 78,460 results of 78,785 for search '"Spectroscopy"', query time: 0.39s Refine Results
  1. 78441

    Antioxidant, antimicrobial and antityrosinase activities of phytochemicals from the leaves of Globimetula braunii (Engler) Van Tiegh (Loranthaceae) by Muhammad, Kamal Ja’afar, Jamil, Shajarahtunnur, Basar, Norazah, Mohd. Arriffin, Norzafneza, Idris, Mariya Tijjani, Jibril, Saidu, Akanji, Fausat Temilola

    Published 2022
    “…Structural elucidations of the isolated compounds were carried out spectroscopically, including the use of 1D/2D nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectroscopies and mass spectrometry. Results indicated that quercetin (15) isolated from ethyl acetate fraction exhibited the highest 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) scavenging capacity and also showed the highest ferric reducing antioxidant potential (FRAP) equivalent value. …”
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    Article
  2. 78442

    XPS and UV\x96vis studies of Ga-doped zinc oxide nanoparticles synthesized by gelatin based sol-gel approach by Khorsand Zak, A., Abd. Aziz, N. S., Hashim, A. M., Kordi, F.

    Published 2016
    “…The effect of doping on the optical band-gap and crystalline quality was also investigated, using ultraviolet-visible (UV–vis), X-ray photoluminescence (XPS), and spectroscopies of the pure and doped ZnO NPs. It was observed that the band-gap and O-vacancies of the doped ZnO NPs were red-shifted in comparison with those of the undoped ZnO NPs in UV–vis and XPS results.…”
    Article
  3. 78443

    Nucleophilic Aromatic Substitution of Pentafluorophenyl-Substituted Quinoline with a Functional Perylene: A Route to the Modification of Semiconducting Polymers by Stefania Aivali, Konstantinos C. Andrikopoulos, Aikaterini K. Andreopoulou

    Published 2023-06-01
    “…The para-fluoro aromatic nucleophilic substitution reaction was confirmed and estimated via <sup>1</sup>H and <sup>19</sup>F NMR spectroscopies. The two different polymer architectures, namely, fully or partially modified with PDI units, were studied in terms of their optical and electrochemical properties, while their morphology was evaluated using TEM analysis, revealing polymers of tailor-made optoelectronic and morphological properties. …”
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    Article
  4. 78444

    Fabrication of Polyaniline/Graphene Oxide Nanosheet@ Tea Waste Granules Adsorbent for Groundwater Purification by Misfer Al Hawash, Rajeev Kumar, Mohamed A. Barakat

    Published 2022-10-01
    “…The synthesized materials were characterized by SEM, XRD, XPS, and FTIR spectroscopies. The optimization of experimental conditions was tested for bromide (Br<sup>−</sup>) removal from synthetic water. …”
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  5. 78445

    THE EFFECT OF CALCINATION TEMPERATURES ON THE PROPERTIES OF ZNO NANOPARTICLES SYNTHESIZED BY USING LEAVES EXTRACTS OF PINUS BRUTIA TREE by Sherwan M. Ismail, Sabah M. Ahmed

    Published 2023-06-01
    “…The chosen plant PB had its findings at both examinations of FTIR and UV-Visible spectroscopies shown and offered to be a superior option for the GS ZnO NPs at various pH levels. …”
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    Article
  6. 78446

    Synergistic Antibacterial Efficacy of Biogenic Silver Nanoparticles Prepared Using Methanolic Stem Extract of Tinospora Cordifolia and Hydrogen Peroxide by Narmada K., Raja Mamilla R. Charan

    Published 2024-01-01
    “…Utilizing MSE under sunlight, biogenic silver nanoparticles were produced, with their properties characterised using FTIR and UV-Visible spectroscopies. Turbidimetry determined the Minimum Inhibitory Concentration (MIC) of SNP-MSE, H2O2, and their varied combinations at different concentrations. …”
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    Article
  7. 78447
  8. 78448

    Effect of dye complex structure on performance in DSSCs; An experimental and theoretical study by Faezeh Arjmand, Zohreh Rashidi Ranjbar, Hassan Fatemi E. G

    Published 2022-11-01
    “…The bandgap, and energy levels of these dyes (1–4) were estimated by Ultraviolet-Visible (UV-Vis), spectroscopies, and cyclic voltammetry (CV).Delocalized π-electron of phenanthroline in two compounds (2, 4) by effectively reducing band gap energies leads to power conversion efficiency (PCE) of 0.511%, and 1.006%, respectively. …”
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  9. 78449
  10. 78450

    Are current atomistic force fields accurate enough to study proteins in crowded environments? by Drazen Petrov, Bojan Zagrovic

    Published 2014-05-01
    “…Moreover, various structural biology methods, such as NMR or different spectroscopies, typically involve samples with relatively high protein concentration. …”
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    Article
  11. 78451

    Cancer-Targeted Controlled Delivery of Chemotherapeutic Anthracycline Derivatives Using Apoferritin Nanocage Carriers by Katarzyna Kurzątkowska, Manuel A. Pazos, Jason I. Herschkowitz, Maria Hepel

    Published 2021-01-01
    “…The encapsulation/release processes were investigated using UV-Vis, fluorescence, circular dichroism, and FTIR spectroscopies. The in vitro cytotoxicity/growth inhibition tests and flow cytometry corroborate high apoptotic activity of APO(drugs) against targeted MDA-MB-231 adenocarcinoma and HeLa cells, and low activity against healthy MCF10A cells, demonstrating targeting ability of nanodrugs. …”
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  12. 78452

    Green Synthesis of New Heterocyclic Surfactant Compounds by Multicomponent Reactions and Their Antibacterial and Corrosion Inhibitor, Study on Carbon Steel Alloy in Acid Media 2 M... by Raneen Salim Al-Hilfi, Najlaa Zaki Al-Ameri, Mouhanad Jwad Al-Asadi

    Published 2023-12-01
    “…Heterocyclic 1,4-di(1,3,5-dithiazinan-5-yl)benzene (D) and two heterocyclic-cationic Gemini surfactant 5,5'-(1,4-phenylene)bis(5-decyl-1,3,5-dithiazinan-5-ium)bromide (E) and 5,5'-(1,4-phenylene)bis(5-tetradecyl-1,3,5-dithiazinan-5-ium)bromide (F) were prepared and identified by FTIR, 1H-NMR spectroscopies, and GC–MS. Then, they were tested as corrosion inhibitors against carbon steel corrosion in 2.0 M aggressive HCl medium at 25 and 50 °C. …”
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    Article
  13. 78453

    A water cooled, high power, dielectric barrier discharge reactor for CO2 plasma dissociation and valorization studies by Nicola Lisi, Umberto Pasqual Laverdura, Rosa Chierchia, Igor Luisetto, Stefano Stendardo

    Published 2023-05-01
    “…It was found that the combination of a high-power, water-cooled plasma reactor, together with electronic and waveform diagnostic, optical emission and mass spectroscopies provides a convenient experimental framework for studies on the chemical storage of fast electric power transients and surges.…”
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  14. 78454

    Nanoparticulate Perovskites for Photocatalytic Water Reduction by Sven A. Freimann, Catherine E. Housecroft, Edwin C. Constable

    Published 2023-07-01
    “…The NPs were characterized using Fourier transform infrared (FTIR) and solid-state absorption spectroscopies, thermogravimetric analysis mass spectrometry (TGA-MS), and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), and the dihydrogen generation was analyzed using gas chromatography–mass spectrometry (GC-MS). …”
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  15. 78455

    Photocatalytic degradation of brilliant green and 4-nitrophenol using Ni-doped Gd(OH)3 nanorods by Shaidatul Najihah Matussin, Fazlurrahman Khan, Mohammad Hilni Harunsani, Young-Mog Kim, Mohammad Mansoob Khan

    Published 2024-04-01
    “…The vibrational modes of Gd(OH)3 and Ni-Gd(OH)3 were confirmed using Raman and Fourier-transform infrared spectroscopies. The band gap energy was greatly influenced by Ni-doping, in which a reduction of the band gap energy from 5.00 to 3.03 eV was observed. …”
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    Article
  16. 78456

    An Improved One-Pot Procedure for Preparation Of N,N -Diethyl-m-Toluamide from m-Toluic Acid by Thinh Pham Duc, Thu Nguyen Van, Phuong Bui Thu, Chau Phan Dinh, Duc Viet Le, Duong Vu Binh

    Published 2022-11-01
    “…The structure of DEET was determined by model spectroscopies MS, and NMR. Conclusions: An improved procedure for the synthesis of N,N-diethyl-m -toluamide (DEET) or N,N-diethyl-m-methylbenzamide is established where the use of all reagents was optimized in suitable amount to apply in industrial production.…”
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  17. 78457

    CeZrOx Promoted Water-Gas Shift Reaction under Steam–Methane Reforming Conditions on Ni-HTASO5 by Qing Zhao, Ye Wang, Guiying Li, Changwei Hu

    Published 2020-09-01
    “…Ni-based catalysts (Ni-γ-Al<sub>2</sub>O<sub>3</sub>, Ni-HTASO5 and Ni-CeZrO<sub>x</sub>) were prepared by impregnation method and characterized by BET, AAS, XRD, H<sub>2</sub>-TPR, CO-TPD, NH<sub>3</sub>-TPD, XPS, TG-DSC-MS and Raman spectroscopies. Using CeZrO<sub>x</sub>-modified Al<sub>2</sub>O<sub>3</sub> (HTASO5) as support, the catalyst exhibited good catalytic performance (TOF<sub>CH4</sub> = 8.0 × 10<sup>−2</sup> s<sup>−1</sup>, TOF<sub>H2</sub> = 10.5 × 10<sup>−2</sup> s<sup>−1</sup>) and carbon resistance for steam-methane reforming (SMR) reaction. …”
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  18. 78458
  19. 78459

    Amino Surface Modification and Fluorescent Labelling of Porous Hollow Organosilica Particles: Optimization and Characterization by Mohammed A. Al-Khafaji, Anikó Gaál, Bálint Jezsó, Judith Mihály, Zoltán Varga

    Published 2022-04-01
    “…The prepared pHOPs were thoroughly characterized by transmission electron microscopy, dynamic light scattering, FT-IR, UV-Vis and fluorescence spectroscopies, and microfluidic resistive pulse sensing. …”
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    Article
  20. 78460

    Exploring Structure Function Relationship using Bio-Inspired DNA-Chromophore Complexes by Chen, Wei Jia

    Published 2022
    “…In this work, we use a combination of ensemble and single-molecule fluorescence spectroscopies and theoretical modelling to explore ways which the photophysics of the cyanine chromophore, Cy3, may be controlled through the tuning of its DNA scaffold. …”
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    Thesis