Showing 3,921 - 3,940 results of 4,095 for search '"spectroscopy"', query time: 0.08s Refine Results
  1. 3921

    Photothermal performance of nanofluids: An experimental study on direct absorption solar energy conversion using graphene oxide and its binary composites for water purification by Abdul Sattar, Bai Bofeng, M. Adeel Munir, Muhammad Farooq, S. Bilal, M. Imran Khan, Noreen Sher Akbar, Mohammed Ilyas Khan, Mohammad Rehan, Fahid Riaz

    Published 2025-04-01
    “…Then, nanofluids were prepared using a standard two-step method, and characterized using scanning electron microscopy and ultraviolet–visible spectroscopy. Photothermal experiments were carried out by weight concentrations (0.02 % and 0.03 %) for ∼ 5h each sunny day. …”
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  2. 3922

    A Principal Component Analysis of Metabolome and Cognitive Decline Among Japanese Older Adults: Cross-sectional Analysis Using Tohoku Medical Megabank Cohort Study Data by Sakura Kiuchi, Kumi Nakaya, Upul Cooray, Kenji Takeuchi, Ikuko N. Motoike, Naoki Nakaya, Yasuyuki Taki, Seizo Koshiba, Shunji Mugikura, Ken Osaka, Atsushi Hozawa

    Published 2025-01-01
    “…Forty-three metabolite variables quantified using nuclear magnetic resonance spectroscopy were used as explanatory variables. Dependent variable was the presence of cognitive decline (≤23 points), assessed by the Mini-Mental State Examination. …”
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  3. 3923

    Changes in photoperiod during the dry period impact colostrum production in Holstein and Jersey cows by K.J. Alward, A.J. Duncan, A.D. Ealy, G.E. Dahl, C.S. Petersson-Wolfe, R.R. Cockrum

    Published 2025-02-01
    “…At calving, colostrum volume was weighed and tested for relative protein concentration with a Brix refractometer and a sample was collected for component analysis (fat, protein, lactose, SNF) via infrared spectroscopy, as well as IgA, IgG, IgG1, IgM, lactoferrin, and SCS analysis. …”
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  4. 3924

    Fluid Inclusion and H–O–S–Pb Isotope Geochemistry of the Yuka Orogenic Gold Deposit, Northern Qaidam, China by Pengjie Cai, Rongke Xu, Youye Zheng, Yueming Yin, Xin Chen, Xianbin Fan, Chao Ma

    Published 2019-01-01
    “…Three types of fluid inclusions were identified in the vein mineral assemblages using petrography and laser Raman spectroscopy: H2O-CO2-NaCl (C-type), H2O-NaCl (W-type), and pure CO2 (PC-type). …”
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  5. 3925

    Design, synthesis, SAR and ADMET analyses of the novel class of synthetic 7-amino[1,2,5]oxadiazolo[3,4-b]pyridine-6-carboxylate derivatives with vasorelaxant activity by Anatolii Varenyk, Roman Vydzhak, Svitlana Panchishin, Irina Ivanova, Victor Zhirnov, Volodymyr Brovarets

    Published 2025-01-01
    “…A twenty six 7-amino[1,2,5]oxadiazolo[3,4-b]pyridine-6-carboxylate (7-aminofurazano[3,4-b]pyridine-6-carboxylate) derivatives have been synthesized and characterized by IR, 1H NMR, 13C NMR spectroscopy, elemental analysis and LC-MS. The potential vasodilator activity of the synthesized compounds was assessed for their ability to induce relaxation of phenylephrine-precontracted isolated rat aortic segments. …”
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  6. 3926

    Enhancement of densification and mechanical property of (Hf0.2Zr0.2Ti0.2Nb0.2Ta0.2)N high-entropy bulk ceramic via silicon carbide addition by Wuyang Song, Youjun Lu, Lutong Yang, Maohui Li, Xiao Zhang, Bo Ma, Chuyun Wang, Yanmin Wang, Jinfeng Li, Xiang Liu

    Published 2025-01-01
    “…The crystal structure, phase composition, and grain size/morphology of the composite were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. The relative density and mechanical properties (i.e., bending strength, Vickers hardness, and fracture toughness) of the composite bulk ceramics were analyzed. …”
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  7. 3927

    Catalytic effect of Fe@Fe2O3 nanowires and Fenton process on carbamazepine removal from aqueous solutions using response surface methodology by M.M. Amin, S. Yousefinejad, M. Dehghani, S. Rahimi

    Published 2019-04-01
    “…After scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffract meter analysis, Fe@Fe<sub>2</sub>O<sub>3</sub> morphology was synthesized in the form of nanowires with diameters of about 40-80 nm. …”
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  8. 3928

    Microplastic contamination in different tissues of commercial fish in estuary area by N.D. Takarina, O.M. Chuan, A. Adiwibowo, F.N.A. Jeffery, N.Z.A.B.N.M. Zamri, M.A. Adidharma

    Published 2024-10-01
    “…Fish samples were taken the gastrointestinal tract, gills and muscle to calculated the microplastic content and identify its shape and size. Raman spectroscopy was applied to verify the polymer of microplastic. …”
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  9. 3929

    Impact of Mn/Co substitution on magnetoelectric and structural properties of ZnO nanostructures thin films by Ángela P. Lanchero, Lina F. Prieto, Heiddy P. Quiroz, Jorge A. Calderón, A. Dussan, F. Mesa

    Published 2025-02-01
    “…X-ray diffraction (XRD) and Raman spectroscopy confirmed the formation of a hexagonal wurtzite crystalline structure with a preferential [002] growth orientation when Mn was incorporated into the ZnO matrix. …”
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  10. 3930

    Kinetic and Photochemical Disequilibrium in the Potentially Carbon-rich Atmosphere of the Warm Jupiter WASP-69 b by Nidhi Bangera, Christiane Helling, Gloria Guilluy, Patricio Cubillos, Luca Fossati, Paolo Giacobbe, Paul Rimmer, Daniel Kitzmann

    Published 2025-01-01
    “…High-resolution transmission spectroscopy of the warm gas giant WASP-69 b has revealed the presence of H _2 O, CO, CH _4 , NH _3 , and C _2 H _2 in its atmosphere. …”
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  11. 3931

    <i>Sambucus nigra</i>-Lyophilized Fruit Extract Attenuated Acute Redox–Homeostatic Imbalance via Mutagenic and Oxidative Stress Modulation in Mice Model on Gentamicin-Induced Nephr... by Kamelia Petkova-Parlapanska, Ivaylo Stefanov, Julian Ananiev, Tsvetelin Georgiev, Petya Hadzhibozheva, Veselina Petrova-Tacheva, Nikolay Kaloyanov, Ekaterina Georgieva, Galina Nikolova, Yanka Karamalakova

    Published 2025-01-01
    “…The ROS and RNS levels, as well as 5-MSL-protein oxidation, were measured by EPR spectroscopy. <b>Results:</b> The antioxidant-protective effect of <i>S. nigra</i> extract (120 mg kg<sup>−1</sup>) was demonstrated by reduced MDA, ROS, and RNS and increased activation of endogenous enzymes. …”
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  12. 3932
  13. 3933

    Spontaneous base flipping helps drive Nsp15’s preferences in double stranded RNA substrates by Zoe M. Wright, Kevin John Butay, Juno M. Krahn, Isha M. Wilson, Scott A. Gabel, Eugene F. DeRose, Israa S. Hissein, Jason G. Williams, Mario J. Borgnia, Meredith N. Frazier, Geoffrey A. Mueller, Robin E. Stanley

    Published 2025-01-01
    “…Through a combination of nuclease assays, 19F NMR spectroscopy, mass spectrometry, and single particle cryo-EM, we determine that Nsp15 acts most efficiently on unpaired Us, particularly those that are already flipped. …”
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  14. 3934

    Response surface method-driven design of experiments for the synthesis of fly ash-based geopolymers in the gallic acid optimized removal from wastewater by Ana Paula Ferreira, Ana Paula S. Natal, Arthur P. Baldo, Adriano S. Silva, Jose L. Diaz de Tuesta, Pricila Marin, José A. Peres, Helder T. Gomes

    Published 2025-03-01
    “…Various techniques were employed, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy. The optimization process highlighted the significance of the Si/Al mass ratio, NaOH molar concentration, and Na₂SiO₃/NaOH as variables in the geopolymers production. …”
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  15. 3935

    Metal-free production of natural blue colorants through anthocyanin–protein interactions by Wenxin Wang, Peiqing Yang, Fuqing Gao, Yongtao Wang, Zhenzhen Xu, Xiaojun Liao

    Published 2025-02-01
    “…Methods: Using human serum albumin (HSA) as a model protein, we investigated the structural influences of ACNs on their blue color generation using visible absorption spectroscopy, fluorescence quenching, and molecular simulations. …”
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  16. 3936

    Hydrogel loaded with cerium-manganese nanoparticles and nerve growth factor enhances spinal cord injury repair by modulating immune microenvironment and promoting neuronal regenera... by Zhaoyang Gong, Zhenhao Chen, Dachuan Li, Xiao Lu, Jianwei Wu, Hanqiu Sun, Ximeng Wang, Siyang Liu, Xinlei Xia, Feizhou Lu, Jianyuan Jiang, Chi Sun, Hongli Wang, Feng Zeng, Xiaosheng Ma

    Published 2025-01-01
    “…Transmission Electron Microscopy, Selected-Area Electron Diffraction, X-ray Diffraction and X-ray Photoelectron Spectroscopy confirmed their crystalline structure, mixed-valence states, and redox properties. …”
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  17. 3937

    One-pot green synthesis of BSA-capped O-CQDs as an effective fluorescent sensing platform for sensitive and selective detection of promethazine drug by S. Viji, A. Dinesh, K. Radhakrishnan, L. Srimathi Priya, C. Sivasankari, Madhappan Santhamoorthy, Manikandan Ayyar, V. Mohanavel, Mohamed Hashem, Hassan Fouad, G. Ramachandran, S. Santhoshkumar

    Published 2025-02-01
    “…Several spectroscopic methods, such as fluorescence, X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), were used to evaluate this enhanced specificity and sensitivity. …”
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  18. 3938

    Fabrication of Nano-Silver Composite Using Amomum longiligulare Fruit Polysaccharides and Their Biological Activities by Lian Y, Ma N, Cheng Q, Luo M, Xu Z, He F, Zhou X, Zhang Y, Jin D, Kong Y, Wang Y, Wei N

    Published 2025-02-01
    “…The synthesized silver nanoparticles were characterized by UV-Vis spectroscopy, FT-IR, DLS, HRTEM and XRD. Finally, the in vitro antioxidant activity, antibacterial activity and anticancer activity of the nano-silver composite were evaluated.Results: Single-factor experiments identified the optimal synthesis conditions for ALP(D)-AgNPs as a reaction time of 180 min, a temperature of 100 °C, and a 10:1 volume ratio of silver nitrate to ALP-D. …”
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  19. 3939

    大鼠缺血缺氧过程脑皮质神经化学物质的变化

    Published 2008-01-01
    “…【目的】运用离体高分辨质子磁共振波谱学(1H nuclear magnetic resonance spectroscopy,1H NMRS)方法对全脑缺血后大鼠脑皮质神经代谢和神经化学物质的变化进行检测,探讨其在缺血再灌注损伤的病理生理过程中的作用?…”
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  20. 3940

    Parameter influences of FTO/ZnO/Cu₂O photodetectors fabricated by electrodeposition and spray pyrolysis techniques by Muthiah N. Najah, Frida A. Rahmania, Integralita Cahyanti, Maulida Hesnaty, Siti Hajar Alias, Djoko Hartanto, Wahyu Prasetyo Utomo, Retno Sari, Hadi Nur

    Published 2025-01-01
    “…The characteristic of FTO/ZnO/Cu2O studied using XRD, SEM annexed with EDX, IV testing and visible light absorption spectroscopy to disclose its optoelectronic applications. …”
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