Showing 3,681 - 3,700 results of 4,095 for search '"spectroscopy"', query time: 0.08s Refine Results
  1. 3681

    Sodium cation exchanged zeolites for direct air capture of CO2 by Do Yeong Kim, Wo Bin Bae, Haehyun Min, Kyeong-Hun Ryu, Sungjoon Kweon, Linh Mai Tran, Young Jin Kim, Min Bum Park, Sung Bong Kang

    Published 2025-01-01
    “…This study systematically investigated the CO2 adsorption-desorption performance of the representative zeolites (ZSM-5, Beta, Mordenite and Y) in H- and Na-forms using various analytical methods, including in-situ Diffuse Reflectance Infrared Fourier Transform spectroscopy. Compared to the corresponding H-zeolites, the enhancement of CO2 adsorption capacity by Na+ ions was observed for all the structure-type zeolite adsorbents. …”
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  2. 3682

    Liquid–Solid Triboelectric Nanogenerator‐Based DNA Barcode Detection Biosensor for Species Identification by Wenlong Ma, Jiawei Li, Xiaolin Qu, Shao‘e Sun, Yanan Zhou, Yitong Liu, Peng Wang, Zhongli Sha

    Published 2025-01-01
    “…However, the wide utilization of existing detection biosensors is limited by bulky and expensive instruments, such as Raman spectroscopy and electrochemical station. Herein, a liquid–solid triboelectric nanogenerator (TENG)‐based DNA barcode detection biosensor is proposed, which consists of water flow, fluid channel, and PDMS film attached by specifically designed capture probe. …”
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  3. 3683

    fNIRS neurofeedback facilitates emotion regulation: Exploring individual differences over the ventrolateral prefrontal cortex by Yiwei Li, Sijin Li, Hua Li, Yuyao Tang, Dandan Zhang

    Published 2025-03-01
    “…Participants in the experimental group underwent VLPFCNF training over eight sessions across two consecutive days, while those in the sham group received random signals from functional near-infrared spectroscopy (fNIRS). To investigate individual variability, participants in the experimental group were further categorized as high or low-efficacy groups based on their training efficiency, determined by the regression slope of VLPFC activity over the sessions. …”
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  4. 3684

    A Study and Comparison of the Preparation of Gadolinium Aluminate Nanoparticles Using γ-Irradiated and Unirradiated Precursors by Tehani I. Al-Muhimeed, Abdullah A. Al-Kahtani, Refaat M. Mahfouz, Mujeeb Khan, M. Rafiq H. Siddiqui

    Published 2018-01-01
    “…The formation of NPs has been confirmed by X-ray diffraction analysis (XRD) and Fourier-transform infrared (FT-IR) spectroscopy. The results indicate towards the formation of an orthorhombic perovskite structure of GdAO3 in the Pbnm space group. …”
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  5. 3685

    In-situ probing of the Fischer-Tropsch reaction on Co single crystal surfaces up to 1 bar by Patrick Lömker, David Degerman, Christopher M. Goodwin, Mikhail Shipilin, Peter Amann, Gabriel L. S. Rodrigues, Fernando Garcia-Martinez, Raffael Rameshan, Jörgen Gladh, Hsin-Yi Wang, Markus Soldemo, Alexander Holm, Steffen Tober, Jan-Christian Schober, Leon Jacobse, Vedran Vonk, Robert Gleißner, Heshmat Noei, Zoltan Hegedues, Andreas Stierle, Christoph Schlueter, Anders Nilsson

    Published 2025-01-01
    “…Here, we report an in-situ X-ray photoelectron spectroscopy study of Co $$\left(0001\right)$$ 0001 and Co( $$10\bar{1}4$$ 10 1 ¯ 4 ), and in-situ high energy surface X-ray diffraction of Co $$\left(0001\right),$$ 0001 , during the Fischer-Tropsch reaction at 0.15 bar - 1 bar and 406 K - 548 K in a H2/CO gas mixture. …”
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  6. 3686

    Synthesis and Pesticidal Activities of 5-(2-Cyclopropylaminopyrimidin-4-yl)-4-(thiophenyl)thiazole Derivatives by Won-Sik Choi, Seok-Woo Nam, Il-Doo Kim, Seung-Han Kim, Kun-Ho Park, In-Kyung Bae, Eun-Sil Park, Hwang-Ju Jeon, Sung-Eun Lee

    Published 2015-01-01
    “…Compounds designated as XIII-6~XV-7 were newly synthesized and their structures were confirmed by 1H- and 13C-NMR spectroscopy. Mosquito larvicidal activities of all the synthesized compounds against C. pipiens pallens were examined and Comp I among them showed the strongest larvicidal activity as 0.513 mM of LC50 value. …”
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  7. 3687

    Tailor-Made, Linear, and “Comb-Like” Polyester-Based Copolymers: Synthesis, Characterization, and Thermal Behavior of Potential 3D-Printing/Electrospinning Candidates by Franco L. Redondo, Mario D. Ninago, Augusto G. O. de Freitas, Cristiano Giacomelli, Andrés E. Ciolino, Marcelo A. Villar

    Published 2018-01-01
    “…Copolymers were characterized by hydrogen nuclear magnetic resonance (1H-NMR), size exclusion chromatography (SEC), and Fourier transform infrared (FTIR) spectroscopy. All polymers exhibited narrow molar masses distributions (Mw/Mn<1.54), and their thermal properties were analyzed by isothermal crystallization kinetics (Avrami’s theory, by using differential scanning calorimetry (DSC)) and by employing modulated thermogravimetric analysis (MTGA). …”
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  8. 3688

    Development of a Sustainable Flexible Humidity Sensor Based on <i>Tenebrio molitor</i> Larvae Biomass-Derived Chitosan by Ezekiel Edward Nettey-Oppong, Riaz Muhammad, Emmanuel Ackah, Hojun Yang, Ahmed Ali, Hyun-Woo Jeong, Seong-Wan Kim, Young-Seek Seok, Seung Ho Choi

    Published 2025-01-01
    “…Comprehensive characterization of the chitosan film was performed using Fourier-transform infrared (FTIR) spectroscopy, contact angle measurements, and tensile testing, which confirmed its chemical structure, wettability, and mechanical stability. …”
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  9. 3689

    Development of HfO₂-Based Solar-Blind SAW UV-C Sensor for Corona Discharge Detection Application by Hyunho Lee, Faisal Nawaz, Eeunsun Shim, Jinjae Lee, Cheol Choi, Keekeun Lee

    Published 2025-01-01
    “…Comprehensive material characterization of the HfO<sub>2</sub> thin film was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The effect of annealing temperature was analyzed in detail, with results confirming that 500 °C is the optimal temperature for achieving the best performance in a SAW-based UV-C corona sensor. …”
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  10. 3690

    Morphology, structure, and electrochemical properties of the MnOx@CNTs composite: a study of SEM, EDX, XPS, and CVA methods by P. M. Korusenko, S. N. Nesov, K. E. Ivlev

    Published 2022-04-01
    “…The study of the electronic structure of the nanocomposite, performed by X-ray photoelectron spectroscopy (XPS), showed that manganese is in two chemically nonequivalent states in MnO2-x and in KMnO4 . …”
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  11. 3691

    Microstructural transformation of GO to rGO by ascorbate acid green-agent enhanced using sonication method by Masruroh, Freygieon Ogiek Rizal Sukma, Kormil Saputra, Nandang Mufti, Kusumandari, Anton Prasetyo, Rachmat T Tjahjanto, Dionysius J D H Santjojo

    Published 2025-01-01
    “…Characterization of particle size distribution and band gap was carried out using PSA and UV–vis, while changes in microstructure, crystallization, and morphology were analyzed using XRD, Raman spectroscopy, and SEM/EDX. The results showed that increasing the sonication duration decreased the particle size of rGO significantly, contributing to microstructural transformation. …”
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  12. 3692

    Study of Highly Stable Nitrogen-Doped a-InGaSnO Thin-Film Transistors by Wenyang Zhang, Li Lu, Chenfei Li, Weijie Jiang, Wenzhao Wang, Xingqiang Liu, Ablat Abliz, Da Wan

    Published 2024-01-01
    “…The X-ray photoelectron spectroscopy analysis (XPS) and low frequency noise (LFN) are employed to study the mechanism of N-doping in a-IGTO TFTs. …”
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  13. 3693

    Intrinsically anisotropic 1D NbTe4 for self-powered polarization-sensitive photodetection by Huahu Luo, Fafa Wu, Chaowei He, Wanfu Shen, Chunguang Hu, Weina Zhao, Peng Yu, Guowei Yang

    Published 2024-11-01
    “…Angle-resolved polarized Raman spectroscopy, in conjunction with azimuth-dependent reflectance difference microscopy, confirmed that 1D NbTe₄ exhibits intrinsic structural and in-plane optical anisotropy. …”
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  14. 3694

    Design and Synthesis of Two Oxazine Derivatives Using Several Strategies by Figueroa-Valverde Lauro, Díaz-Cedillo Francisco, Rosas-Nexticapa Marcela, García-Cervera Elodia, Pool-Gómez Eduardo, López-Ramos María, Hau-Heredia Lenin, Sarabia-Alcocer Betty

    Published 2014-01-01
    “…The structure of compounds obtained was confirmed by elemental analysis, spectroscopy, and spectrometry data. In conclusion, the methods used offer some advantages such as good yields, simple procedure, low cost, and ease of workup.…”
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  15. 3695

    Adsorption isotherms in roasted specialty coffee (Coffea arabica L.): Dataset and statistical tools for optimizing storage conditions and enhancing shelf lifeMendeley Data by Gentil A. Collazos-Escobar, Andrés F. Bahamón-Monje, Nelson Gutiérrez-Guzmán

    Published 2025-02-01
    “…Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy was used to characterize the coffee samples spectrally. …”
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  16. 3696

    Physical, chemical and biological properties of MTA Angelus and novel AGM MTA: an in vitro analysis by Sara Nashibi, Parisa Amdjadi, SeyedehSana Ahmadi, Sara Hekmatian, Maryam Torshabi

    Published 2025-01-01
    “…The pH changes were measured at intervals of 3, 6, 24, 72, 96 and 144 h postimmersion in Hank’s solution and calcium ion release was analysed after 168 h of immersion via inductively coupled plasma optical emission spectroscopy (ICP‒OES). Moreover, the cytotoxicity was assessed through the MTT assay on human dental pulp stem cells (hDPSCs) after 24 and 72 h of exposure to the set/fresh status of various dilutions of MTA extracts, following the ISO 10993-12 standard. …”
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  17. 3697

    Changes in Tropospheric Nitrogen Dioxide Vertical Column Densities over Japan and Korea during the COVID-19 Using Pandora and MAX-DOAS by Yongjoo Choi, Yugo Kanaya, Hisahiro Takashima, Kihong Park, Haebum Lee, Jihyo Chong, Jae Hwan Kim, Jin-Soo Park

    Published 2023-03-01
    “…Abstract We investigated the impact of human activity during COVID-19 on the tropospheric nitrogen dioxide vertical column density (NO2 TropVCD) at three urban sites (Gwangju and Busan in Korea and Yokosuka in Japan) and one remote site (Cape Hedo in Japan) from Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) and Pandora. Compared to the monthly mean NO2 TropVCD from 2015 to 2018 and in 2019, the values were lower in 2020 due to social distancing in Korea and Japan. …”
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  18. 3698

    Novel Organotin(IV) Schiff Base Complexes with Histidine Derivatives: Synthesis, Characterization, and Biological Activity by Ariadna Garza-Ortiz, Carlos Camacho-Camacho, Teresita Sainz-Espuñes, Irma Rojas-Oviedo, Luis Raúl Gutiérrez-Lucas, Atilano Gutierrez Carrillo, Marco A. Vera Ramirez

    Published 2013-01-01
    “…Characterization has been completed by IR and high-resolution mass spectroscopy, 1D and 2D solution NMR (1H, 13C  and 119Sn), as well as solid state 119Sn NMR. …”
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  19. 3699

    Nature and Evolution of the Ore-Forming Fluids from Nanmushu Carbonate-Hosted Zn-Pb Deposit in the Mayuan District, Shaanxi Province, Southwest China by Suo-Fei Xiong, Yong-Jun Gong, Shu-Zhen Yao, Chuan-Bo Shen, Xiang Ge, Shao-Yong Jiang

    Published 2017-01-01
    “…Detailed fluid inclusion study shows two types of fluids in the sphalerite, quartz, dolomite, calcite and barite, that is, aqueous-salt dominant inclusions (type I) and hydrocarbon-bearing inclusions (type II). The Laser Raman spectroscopy study shows occurrence of certain amount of CH4, C4H6, and bitumen. …”
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  20. 3700

    Quantification of Mineral Oil Aromatic Hydrocarbons (MOAH) in Anhydrous Cosmetics Using 1H NMR by Sandra Weber, Tamina Schmidt, Paul Schumacher, Thomas Kuballa, Gerd Mildau, Stephan G. Walch, Andrea Hartwig, Dirk W. Lachenmeier

    Published 2019-01-01
    “…This publication presents a rapid method for quantifying MOAH by proton nuclear magnetic resonance spectroscopy (1H qNMR) in anhydrous cosmetics such as lipstick, lip gloss, and lip balm. …”
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