Showing 201 - 220 results of 280 for search '"Nuclear magnetic resonance"', query time: 0.08s Refine Results
  1. 201

    Separation, Purification, Structural Characterization and in Vitro Antioxidant Activity of Low Molecular Mass Fucoidans by YU Fan, GUO Yingying, LI Na, DAI Xinyue, ZHU Wenjia, YAO Lin, JIANG Yanhua, WANG Lianzhu

    Published 2025-01-01
    “…The chemical composition and structure characteristics of LMWFs were analyzed using molecular exclusion chromatography (MEC), high performance liquid chromatography (HPLC), infrared spectroscopy (IRS) and nuclear magnetic resonance spectroscopy (NMRS), and the structure-antioxidant activity relationship was explored. …”
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    Article
  2. 202

    Discovery of Antimalarial Drugs from Streptomycetes Metabolites Using a Metabolomic Approach by Siti Junaidah Ahmad, Mohd Badrin Hanizam Abdul Rahim, Syarul Nataqain Baharum, Mohd Shukri Baba, Noraziah Mohamad Zin

    Published 2017-01-01
    “…The highly sensitive instruments, such as Liquid Chromatography-Mass Spectrophotometry (LC-MS), Gas Chromatography-Mass Spectrophotometry (GC-MS), and Nuclear Magnetic Resonance (1H-NMR) spectroscopy, provide a wide range of information in the identification of potentially bioactive compounds. …”
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    Article
  3. 203

    Synthesis of Some Metal Complexes with New Heterocyclic Ligand (5-(((2-(3-(1<i>H</i>-indol-3-yl)acryloyl)phenyl)amino)methylene)-2-thiooxodihydropyrimidine-4,6(1<i>H</i>,5<i>H</i>)... by Thanaa Abdul Ameer Hilal, Ibtihal Kadhim Kareem

    Published 2025-01-01
    “…The results of spectrophotometry, nuclear magnetic resonance of proton (H-NMR), infrared spectroscopy (FTIR), ultraviolet and visible (UV-vis) spectroscopy, X-ray diffraction (XRD), elemental analysis (CHNS) and molar conductivity measurements were used to suggest the proposed structures. …”
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    Article
  4. 204

    Light Regulates Secreted Metabolite Production and Antagonistic Activity in <i>Trichoderma</i> by Edgardo Ulises Esquivel-Naranjo, Hector Mancilla-Diaz, Rudi Marquez-Mazlin, Hossein Alizadeh, Diwakar Kandula, John Hampton, Artemio Mendoza-Mendoza

    Published 2024-12-01
    “…The 6-PP was purified, and its spectrum by nuclear magnetic resonance and mass spectroscopy was identical to that of commercial 6-PP. …”
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    Article
  5. 205

    Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal by Jiaoxia Sun, Xiqin Ma, Xiang Li, Jianxin Fan, Qingkong Chen, Xuelian Liu, Jin Pan

    Published 2018-01-01
    “…Fourier transform infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance spectroscopy (1H NMR), thermogravimetry/differential scanning calorimetry (TG/DSC), and scanning electron microscopy (SEM) were employed to characterize the structure, thermal decomposition property, and morphology of the polymers, respectively. …”
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    Article
  6. 206

    An Improved Predictive Model for Determining the Permeability Coefficient of Artificial Clayey Soil Based on Double T2 Cut-Offs by Zhen Lu, Aimin Sha, Junfeng Gao, Meng Jia, Wentong Wang

    Published 2020-01-01
    “…To establish a simple and accurate predictive method to obtain the permeability coefficient of artificial clayey soil based on the double cut-off transverse relaxation times (T2 cut-offs) using low-field nuclear magnetic resonance (NMR) technology, eight kinds of artificial clayey soil with different mineralogical compositions were prepared in the laboratory. …”
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    Article
  7. 207

    Synthesis and Study of Chemical, Thermal, Mesomorphic, and Optical Properties of Terphenyls Modified with Nitrile Groups by M. L. Mota González, A. Carrillo Castillo, R. C. Ambrosio Lázaro, J. Flores Méndez, Mario Moreno, Priscy A. Luque, Dámaso Navarro

    Published 2017-01-01
    “…The products obtained were analyzed as powders or after being drop-casted or spin-coated on glass. Nuclear Magnetic Resonance (1H NMR) and Fourier Transform Infrared (FTIR) spectroscopy techniques confirmed the structure and purity of the synthesized terphenyls. …”
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    Article
  8. 208

    Quantitative Characterization of Pore Connectivity and Movable Fluid Distribution of Tight Sandstones: A Case Study of the Upper Triassic Chang 7 Member, Yanchang Formation in Ordo... by Boli Wang, Xisen Zhao, Wen Zhou, Bin Chang, Hao Xu

    Published 2020-01-01
    “…In this paper, multiple techniques including high-pressure mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), and microcomputer tomography scanning (micro-CT) were used for the quantitative characterization of pore structure, pore connectivity, and movable fluid distribution. …”
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    Article
  9. 209

    Improving 10-year cardiovascular risk prediction in patients with type 2 diabetes with metabolomics by Ruijie Xie, Teresa Seum, Sha Sha, Kira Trares, Bernd Holleczek, Hermann Brenner, Ben Schöttker

    Published 2025-01-01
    “…A total of 249 metabolites were measured with nuclear magnetic resonance (NMR) spectroscopy. Sex-specific LASSO regression with bootstrapping identified significant metabolites. …”
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    Article
  10. 210

    Synthesis and Optical Characterization of Mixed Ligands Beryllium Complexes for Display Device Applications by Vandna Nishal, Devender Singh, Raman Kumar Saini, Vijeta Tanwar, Shri Bhagwan, Sonika Kadyan, Ishwar Singh, Pratap Singh Kadyan

    Published 2015-01-01
    “…These complexes, that is, [BeHPB(Clq)], [BeHPB(Cl2q)], [BeHPB(Meq)], and [BeHPB(q)], were prepared and their structures were confirmed by elemental analysis, Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermal analysis. …”
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    Article
  11. 211

    Antimicrobial and antiproliferative activity of biosynthesized manganese nanocomposite with amide derivative originated by endophytic Aspergillus terreus by Nashwa El-Gazzar, Reem Farouk, Nervana S. Diab, Gamal Rabie, Basel Sitohy

    Published 2025-02-01
    “…In addition, the most potent product was identified based on instrumental analysis through Nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR), and Gas chromatography-mass spectrometry (GC.MS). …”
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    Article
  12. 212

    Solid-State 13C NMR Spectroscopy Applied to the Study of Carbon Blacks and Carbon Deposits Obtained by Plasma Pyrolysis of Natural Gas by Jair C. C. Freitas, Daniel F. Cipriano, Carlos G. Zucolotto, Alfredo G. Cunha, Francisco G. Emmerich

    Published 2016-01-01
    “…Solid-state 13C nuclear magnetic resonance (NMR) spectroscopy was used in this work to analyze the physical and chemical properties of plasma blacks and carbon deposits produced by thermal cracking of natural gas using different types of plasma reactors. …”
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    Article
  13. 213

    Selective Americium Separation: New Insights into the Complexation of Trivalent f-Elements with SO3-Ph-BTBP by Sauerwein Fynn S., Sittel Thomas, Geist Andreas, Panak Petra J., Wilden Andreas, Modolo Giuseppe

    Published 2025-01-01
    “…Fundamental extraction mechanism studies revealed an unusual extraction behavior of heavy Ln(III) and Y(III), which provided the motivation to investigate their complexation with SO3-Ph-BTBP using nuclear magnetic resonance (NMR) spectroscopy and solvent extraction. …”
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    Article
  14. 214

    SSNMR confirms silicate ion substitution in the apatitic structure of 0.8wt% Si hydroxyapatite by Marc-Krystelle Mafina, Rory M. Wilson, Gregory J. Rees, Peter Gierth, Alice C. Sullivan, Karin A. Hing

    Published 2023-11-01
    “…Solid-state nuclear magnetic resonance (SSNMR) spectroscopy was carried out to view the elemental interactions using phosphorus (31P) and silicon (29Si) probes to confirm or refute the presence of silicate groups in relation to phosphate groups in the bulk material structure. …”
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  15. 215
  16. 216

    Numerical Test Study of the Microscale Failure Modes and Fractal Analysis of Lower Cambrian Shale Based on Digital Images by Hengtao Cui, Zhonghu Wu, Liping Li, Jing Wang, Shuguang Song, Shangqu Sun, Yujun Zuo, Hao Liu, Yili Lou

    Published 2020-01-01
    “…To reveal the effect of confining pressure on the mechanical properties and rupture modes of quartz-bearing shale, the shale core of the no. 3 block of Fenggang, Guizhou Province, China, was analyzed by nuclear magnetic resonance, polarized light microscope thin section observation and identification, and core X-ray whole-rock minerals diffraction analysis to determine the distribution of shale minerals in the Niutitang Formation. …”
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    Article
  17. 217

    Phenols from Vaccinium dunalianum Wight: Secondary Mass Spectrometry Fragmentation and Neuroprotective Effect by ZHOU Tang, WANG Ji, QIAO Wenhao, LIN Zhiqi, ZHU Hongbo, CHANG Yue, HU Weiyan, ZHANG Rongping, CHEN Xinglong

    Published 2024-12-01
    “…In order to elucidate the health efficacy of Vaccinium dunalianum buds as a tea substitute and to reveal the material basis for its functionality, we studied the chemical constituents of V. dunalianum buds by using separation materials such as silica gel, MICHP-20p gel, Sephadex LH-20, and RP-18 combined with preparative and semi-preparative high performance liquid chromatography (HPLC), high-resolution mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy. Totally 16 phenolic compounds were isolated and identified from the water extract of V. dunalianum buds, including seven arbutins, four flavonoids, two lignansand, and three other phenolic compounds, among which compounds 2–5, 7, and 11–16 were isolated from the Vaccinium genus for the first time. …”
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  18. 218

    Effect of pore throats on the reservoir quality of tight sandstone: A case study of the Yanchang Formation in the Zhidan area, Ordos Basin by Wei Fanrong, Yan Xinzhi, Bai Yubin, Bai Yanjun, Zhou Kai

    Published 2025-02-01
    “…Taking the main tight oil production province of the Ordos Basin in China as a case study, nuclear magnetic resonance (NMR), pressure-controlled mercury injection (PMI), scanning electron microscopy, and micro-computed tomography (μCT) are used to analyze the characteristics of four types of tight sandstones with different pore throats. …”
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    Article
  19. 219

    4,6-Disubstituted pyrimidine-based microtubule affinity-regulating kinase 4 (MARK4) inhibitors: synthesis, characterization, in-vitro activity and in-silico studies by Ashanul Haque, Khalaf M. Alenezi, Mohd. Saeed Maulana Abdul Rasheed, Md. Ataur Rahman, Saleha Anwar, Shahzaib Ahamad, Dinesh Gupta

    Published 2025-01-01
    “…The drug-likeness feature and toxicity of the molecules were evaluated using QikProp and other tools.ResultsCompounds were synthesized following a multi-step approach and characterized using multi-nuclear magnetic resonance (1H/13C-NMR) and mass spectrometry. …”
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  20. 220

    Study on the Spontaneous Imbibition Characteristics of the Deep Longmaxi Formation Shales of the Southern Sichuan Basin, China by Chao Qian, Xizhe Li, Weijun Shen, Wei Guo, Yong Hu, Zhongcheng Li

    Published 2021-01-01
    “…In this study, the pore structure characteristics of organic-rich deep shale in the Lower Silurian Longmaxi Formation of Weiyuan-Luzhou play were analyzed by low-temperature nitrogen adsorption experiments, and then the imbibition characteristics and factors influencing deep shale were extensively investigated by spontaneous imbibition and nuclear magnetic resonance experiments. The results show that mainly micropores and mesopores are growing in the deep organic-rich shale of the Longmaxi Formation. …”
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    Article