Showing 2,901 - 2,920 results of 3,204 for search '"spectroscopy"', query time: 0.06s Refine Results
  1. 2901

    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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  2. 2902

    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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  3. 2903

    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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  4. 2904

    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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  5. 2905

    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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  6. 2906

    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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  7. 2907

    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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  8. 2908

    The impact of multi-marine intertidal service on the durability of concrete repair materials by Zhiqiang Cui, Yuanbei Li, Qizheng Bao, Yong Chen, Qiang Xu, Yunqing He, Fangzheng Wu

    Published 2025-07-01
    “…The methods employed to investigate the causes of durability degradation after exposure included Mercury Intrusion Porosimetry (MIP), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and microscopy. After one year of exposure at Sanya (a tropical marine climate), the materials’ mechanical properties showed only a slight overall decline. …”
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  9. 2909

    Incorporation of κ-carrageenan improves the practical features of agar/konjac glucomannan/κ-carrageenan ternary system by Dongling Qiao, Hao Li, Fatang Jiang, Siming Zhao, Sheng Chen, Binjia Zhang

    Published 2023-03-01
    “…., scanning electron microscopy, small-angle X-ray scattering, infrared spectroscopy (IR) and X-ray diffraction (XRD), were used to disclose how κ-carrageenan addition tailors the features of agar/KGM/κ-carrageenan ternary system. …”
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  10. 2910

    Influence of Molybdenum Content and MoOxy- Species on the Textural and Structural ZrO2 Properties by Alberto Hernández Zapién, Juan Manuel Hernández Enríquez, Ricardo García Alamilla, Guillermo Sandoval Robles, Ulises Páramo García, Luz Arcelia García Serrano

    Published 2014-01-01
    “…The characterization of the solids was carried out by thermal analysis, X-ray diffraction, nitrogen physisorption, infrared spectroscopy, and scanning electron microscopy. The thermal analyses results showed that the change from the amorphous to the crystalline phase of ZrO2 is shifted to higher temperatures due to the presence of molybdenum content. …”
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  11. 2911

    Use of Nanostructured Layered Double Hydroxides as Nanofilters in the Removal of Fe2+ and Ca2+ Ions from Oil Wells by Emmanuel K. Ephraim, Chinyere A. Anyama, Ayi A. Ayi, Jude C. Onwuka

    Published 2018-01-01
    “…The isolated compounds were characterized with the help of XRD, IR, and SEM/EDAX, and their ability to remove scale-forming ions from the aqueous system was studied with the help of atomic absorption spectroscopy (AAS). The SEM micrographs of Mg-O-Al-OH and Ca-O-Al-OH layers intercalated with PO43− and/or [PO4PF6]4− anions are similar consisting of uniform nanospheres with an average size of 100 nm, while the M-O-Al-OH layer of compound 3, intercalated with SO42− anions, consists of hexagonal nanoplate crystals. …”
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  12. 2912

    Characterization and optimization of cerium oxide nanoparticle-doped cellulose acetate films using the Box-Behnken Design by Lívia Viana Aguiar de Oliveira, Noemi Raquel Checca Huaman, Sergio Neves Monteiro, Ulisses Oliveira Costa, Letícia Vitorazi

    Published 2025-03-01
    “…A comprehensive characterization was conducted using SEM, AFM, EDS, XRD, TEM, SAED, EELS, TGA, DSC, UV–Vis spectroscopy, and tensile testing. The Box-Behnken Design (BBD) was applied to optimize the effects of CeO₂ concentration, PEG content, and drying temperature on mechanical, thermal, and optical properties. …”
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  13. 2913

    Probing the Catalytic Efficiency of Supported Heteropoly Acids for Esterification: Effect of Weak Catalyst Support Interactions by Ali Alsalme, Aliyah A. Alsharif, Hamda Al-Enizi, Mujeeb Khan, Saad G. Alshammari, Mshari A. Alotaibi, Rais Ahmad Khan, Mohammed Rafiq H. Siddiqui

    Published 2018-01-01
    “…The as-prepared catalysts were characterized by various techniques including FT-IR spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and BET. …”
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  14. 2914

    Bioaccumulation and Health Risk Assessments of Heavy Metals in Mussels Collected from Madura Strait, Indonesia by Defri Yona, Aida Sartimbul, Muhammad Arif Rahman, Syarifah Hikmah Julinda Sari, Priyanka Mondal, Abdullah Hamid, Tsania Humairoh

    Published 2021-03-01
    “…The seawater, sediment, and marine mussels were obtained from four sites and heavy metal concentrations were analyzed using Atomic Absorption Spectroscopy. In the seawater, heavy metals were in the order of Cu, Pb, Cd, and Zn from the highest to the lowest concentration respectively, while they went down in the order of Zn, Cu, Pb, and Cd in the sediment respectively. …”
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  15. 2915

    Studying Alzheimer’s disease through an integrative serum metabolomic and lipoproteomic approach by Alessia Vignoli, Giovanni Bellomo, Federico Paolini Paoletti, Claudio Luchinat, Leonardo Tenori, Lucilla Parnetti

    Published 2025-01-01
    “…Methods This pilot study proposes a serum investigation via nuclear magnetic resonance (NMR) spectroscopy in a consecutive series of AD patients including 57 patients affected by Alzheimer’s disease at dementia stage (AD-dem) and 45 patients with mild cognitive impairment (MCI) due to AD (MCI-AD). …”
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  16. 2916

    Dependency of solid particle erosion behaviour of plasma sprayed NiTi coating on primary gas flow rate by B. Swain, S. Mantry, S.S. Mohapatra, P. Mallick, A. Behera

    Published 2025-01-01
    “…Various phases have been obtained from the X-ray diffraction analysis such as NiTi-B2, Ni, Ti, Ni3Ti, Ti2Ni, NiO, TiO and Ni4Ti3, which also have been confirmed by energy dispersive spectroscopy method. From the microstructural investigation, various surface and interface defects such as unmelted particle formation, pores, microcracks, splat delamination etc. have been observed at the coatings developed at low primary gas flow rate and homogeneous splats have been observed from the coatings developed at higher primary gas flow rate. …”
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  17. 2917

    Profiles of traditional farms: soil texture, total inorganic N and bacteria-producing estate by Yuni Puji Hastuti, Iman Rusmana, T. Widiyanto

    Published 2010-07-01
    “…Chemical and biological analyses were done using spectroscopy and Most Probable Number methods to determine the amount of nitrite and ammonium production of bacteria.  …”
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  18. 2918

    NIRS as an alternative method for table grapes Seedlessness sorting by Chaorai Kanchanomai, Parichat Theanjumpol, Phonkrit Maniwara, Sila Kittiwachana, Sujitra Funsueb, Shintaroh Ohashi, Daruni Naphrom

    Published 2025-06-01
    “…The shortwave-near infrared spectroscopy (SW-NIRS), coupled with suitable chemometric analysis, is a non-destructive method for sorting and prediction of seedlessness grapes. …”
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  19. 2919

    Analysis of oral cancer carcinogens in repeatedly heated cooking oils by Vidhant Krishna Nambiar, Vidya Mudliar, Inosi Salababa

    Published 2025-01-01
    “…The test group (T0-3) of oils were heated to 190 °C and tested for the presence of carcinogens using Gas chromatography Mass Spectroscopy after 1.5 h at recommended temperature (T0), reheated to 190 °C and tested after 1 h (T1), reheated to 190 °C and tested after 3 h (T2) and reheated to 190 °C and tested after 6 h (T3). …”
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  20. 2920

    Antifungal efficacy of chitosan-mediated fenugreek nanocomposite incorporated in tissue conditioner by Mohika Damle, Ponsekar Abraham Anandapandian, B. Eswaran, Swapnaneel Pradhan, Silvin Joe C J, Shreyas Dhumke

    Published 2025-03-01
    “…Methodology: After synthesizing chitosan mediated fenugreek Nanocomposite, its characterization was performed using SEM, FTIR analysis and UV–Vis spectroscopy. Heat cure denture base discs coated with tissue conditioner-nanocomposite mixture were used to transfer fungal cultures onto Rose Bengal agar to assess colony formation. …”
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