Showing 121 - 140 results of 280 for search '"Nuclear magnetic resonance"', query time: 0.07s Refine Results
  1. 121

    A Comparison of the Physicochemical Properties and Fatty Acid Composition of Indaiá (Attalea dubia) and Babassu (Orbignya phalerata) Oils by Bianca Silva Ferreira, Lara Pereira Faza, Mireille Le Hyaric

    Published 2012-01-01
    “…The oil was also analyzed using infrared and nuclear magnetic resonance spectroscopy. The fatty acid profile of the oil was determined by GC-MS. …”
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    Article
  2. 122

    A digital platform for automated analysis of 1H NMR data: prototype framework of digital reference standard by Sunil Babu Paudel, Joo-Won Nam, Gonzalo R. Malca Garcia, Ben Shapiro, Pekka Laatikainen, Yang Liu

    Published 2025-01-01
    “…Abstract This study introduces an innovative approach to automatically analyzing 1H nuclear magnetic resonance (NMR) data, integrating a quantum mechanical spectral analysis (QMSA) to enhance efficiency over manual data analysis in NMR. …”
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    Article
  3. 123

    Bioactive sorbicillinoid derivatives from an endophytic fungus Trichoderma citrinoviride by Yan-Ping Xia, Yan Xie, Li Rao, Guo-Ping Yin

    Published 2025-01-01
    “…Their structures were elucidated through extensive analyses of spectroscopic data, computer-assisted structure elucidation (ACD/Structure Elucidator), density functional theory (DFT) calculations of the nuclear magnetic resonance (NMR) spectra, and electronic circular dichroism (ECD). …”
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    Article
  4. 124

    Purification, structural elucidation, and in vitro antitumor effects of novel polysaccharides from Bangia fuscopurpurea by Jingna Wu, Xiaoting Chen, Kun Qiao, Yongchang Su, Zhiyu Liu

    Published 2021-01-01
    “…The structural characteristics of BFP-3 were investigated by chemical and spectroscopic methods, including partial acid hydrolysis, methylation analysis, one- and two-dimensional nuclear magnetic resonance, and gas chromatography-mass spectrometry. …”
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    Article
  5. 125

    Deciphering Metabolic Responses in Traumatic Brain Injury Patients With Different Severity Using 1H NMR-Based Serum Metabolomics by Huan Zhou, Dongdong Sun, Dongmei Wang, Zirui Zhu, Xuelian Hong, Rui Fang, Hua Wang, Minghui Li

    Published 2025-01-01
    “…In order to elucidate the underlying pathophysiologic mechanisms and identify serum biomarkers associated with TBI, we conducted a comprehensive investigation utilizing a 1H nuclear magnetic resonance (NMR)–based metabolomics approach and ELISA analysis of serum samples obtained within 24 h postinjury from a cohort of participants with varying degrees of TBI severity. …”
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    Article
  6. 126

    Blasting-Induced Permeability Enhancement of Ore Deposits Associated with Low-Permeability Weakly Weathered Granites Based on the Split Hopkinson Pressure Bar by Lei Yan, Wenhua Yi, Liansheng Liu, Jiangchao Liu, Shenghui Zhang

    Published 2018-01-01
    “…By combining nuclear magnetic resonance (NMR) and triaxial seepage tests, this study investigated the change laws in the mechanical properties, porosity evolution, and permeability coefficients of the samples under cyclic impacts. …”
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    Article
  7. 127

    Effect of Bentonite Prehydration Time on the Stability of Lightweight Oil-Well Cement System by Stephen Adjei, Salaheldin Elkatatny, Abdulaziz Al-Majed

    Published 2021-01-01
    “…Density measurements and pore space analysis with the nuclear magnetic resonance (NMR) technique were used to investigate the homogeneity of cement-based cores. …”
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    Article
  8. 128

    Benchtop 1H NMR spectroscopy as a practical tool for characterization of chemically ex-changing systems in Ascorbic acid by Sevil Cikrikci

    Published 2021-03-01
    “…Nuclear magnetic resonance (NMR) spectra and its action on characterization of pH dependent systems are among the most useful tools in spectroscopic techniques. …”
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    Article
  9. 129

    A Promising Material by Using Residue Waste from Bisphenol A Manufacturing to Prepare Fluid-Loss-Control Additive in Oil Well Drilling Fluid by Zhi-Lei Zhang, Feng-Shan Zhou, Yi-He Zhang, Hong-Wei Huang, Ji-Wu Shang, Li Yu, Hong-Zhen Wang, Wang-Shu Tong

    Published 2013-01-01
    “…Fourier transform infrared (FTIR) spectroscopy, gas chromatography-mass spectrometry (GC-MS), and nuclear magnetic resonance (NMR) were used to characterize the residues. …”
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    Article
  10. 130

    Time-Varying Compressive Strength Model of Aeolian Sand Concrete considering the Harmful Pore Ratio Variation and Heterogeneous Nucleation Effect by Yugen Li, Huimei Zhang, Xiaoyu Liu, Guangxiu Liu, Dawei Hu, Xiangzhen Meng

    Published 2019-01-01
    “…Influence mechanism of aeolian sand on the strength of concrete was revealed by using the nuclear magnetic resonance (NMR) to analyze the pore ratio and structures of aeolian sand concrete (ASC) and using the X-ray single crystal diffraction (XRD) to calculate the relative contents of hydration products semiquantitatively. …”
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    Article
  11. 131

    Method of Calculating Secondary Porosity of Reef Limestone Reservoir by Casting Thin Section Calibrating Nuclear Magnetic T2 Spectrum by Bin Zhao, Zhaoping Li, Chuqiao Gao, Guoyi Zhang, Jinbo Wu, Gang Gao, Yang Tang

    Published 2021-01-01
    “…We present a new method for calculating secondary porosity of reef limestone reservoir by the nuclear magnetic resonance T2 spectrum which is calibrated by casting thin section. …”
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  12. 132

    Identification of Imitation Cheese and Imitation Ice Cream Based on Vegetable Fat Using NMR Spectroscopy and Chemometrics by Yulia B. Monakhova, Rolf Godelmann, Claudia Andlauer, Thomas Kuballa, Dirk W. Lachenmeier

    Published 2013-01-01
    “…In this study, 400 MHz nuclear magnetic resonance (NMR) spectroscopy of the fat fraction of the products was used in the context of food surveillance to validate the labeling of milk-based products. …”
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    Article
  13. 133

    Self-Healing Photocurable Epoxy/thiol-ene Systems Using an Aromatic Epoxy Resin by Ricardo Acosta Ortiz, Omar Acosta Berlanga, Aída Esmeralda García Valdez, Rafael Aguirre Flores, José Guadalupe Télles Padilla, María Guadalupe Méndez Padilla

    Published 2016-01-01
    “…The oligomer was characterized by Fourier transform infrared spectroscopy (FTIR), Raman and nuclear magnetic resonance spectroscopies, and gel permeation chromatography (GPC). …”
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    Article
  14. 134

    (5E,7E)-4,5,6 Trihydroxy-3-(hydroxymethyl)tetrahydro-2H-pyran-2-ylheptadeca-5,7-dienoate from Euclea crispa (L.) Inhibits Ovarian Cancer Cell Growth by Controlling Apoptotic and Me... by Chella Perumal Palanisamy, Bo Cui, Hongxia Zhang, Selvaraj Jayaraman, Ponnulakshmi Rajagopal, Vishnu Priya Veeraraghavan

    Published 2022-01-01
    “…Further, the compound was confirmed by spectroscopic techniques such as ultraviolet-visible (UV/Vis) spectrometer, Fourier transform infrared (FTIR) spectrometer, and 1H and 13C nuclear magnetic resonance (NMR). Compound 2 exhibited a significant antioxidant activity with IC50 values. …”
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    Article
  15. 135

    Macro-Micro Study on Mechanical Properties of Frozen Fine Sandstone Based on DEM Mathematical Model by Maoyan Ma, Min You, Shuguang Peng, Biao Zhang, Yuan Lin

    Published 2022-01-01
    “…Furthermore, the nuclear magnetic resonance (NMR) technology was used to obtain pore distribution of the freezing sandstone. …”
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    Article
  16. 136

    Enhancement of Lignin Biopolymer Isolation from Hybrid Poplar by Organosolv Pretreatments by Miao Wu, Jinhui Pang, Xueming Zhang, Runcang Sun

    Published 2014-01-01
    “…The isolated lignin fractions were characterized by Fourier transform infrared spectroscopy (FT-IR), high-performance anion exchange chromatography (HPAEC), 2D nuclear magnetic resonance (2D NMR), and thermogravimetric analysis (TGA). …”
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  17. 137

    Experimental Investigation into the Effects of Fracturing Fluid-Shale Interaction on Pore Structure and Wettability by Yan Zhang, Zhiping Li, Fengpeng Lai, Hao Wu, Gangtao Mao, Caspar Daniel Adenutsi

    Published 2021-01-01
    “…In this study, the pore structure and fluid distribution of shale samples were analyzed by utilizing low-pressure liquid nitrogen adsorption (LP-N2GA) and nuclear magnetic resonance (NMR). The fractal analysis showed that the pore structure of the sample was strongly heterogeneous. …”
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    Article
  18. 138

    A New Method for Artificial Core Reconstruction of a Fracture-Control Matrix Unit by Qiang Liu, Jianjun Liu, Guihong Pei, Zhengwen Zhu, Yun Lei

    Published 2020-01-01
    “…Finally, the porosity, permeability, and wettability of the matrix system and the T2 spectra from nuclear magnetic resonance (NMR) before and after reconstruction are measured. …”
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    Article
  19. 139

    Experimental Research on the Impact of Ion Exchange and Infiltration on the Microstructure of Rare Earth Orebody by Xiaojun Wang, Yulong Zhuo, Shuqiang Deng, Yongxin Li, Wen Zhong, Kui Zhao

    Published 2017-01-01
    “…To detect the evolutional characteristics of pore structure in ore leaching process of ion-type rare earth, this paper analyzes the influence mechanism of ion exchange seepage action on the microstructure of orebody, and an experiment for remodeling rare earth saturated samples and ore leaching was designed. Using nuclear magnetic resonance technology obtains the pore structure T2 map of H2O and (NH4)2SO4 solution in the ore leaching process and inverts and reconstitutes the pore structure distribution image. …”
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  20. 140

    Potential of glycerol as a bio-based wood adhesive by Jianshu Lu, Tomofumi Umeshita, Shunsuke Sakai, Miyuki Matsuo-Ueda, Daisuke Ando, Shuoye Chen, Kenji Umemura

    Published 2025-02-01
    “…Ether linkages were detected by Fourier transform infrared spectroscopy and heteronuclear single quantum coherence nuclear magnetic resonance spectroscopy. Our results demonstrated that good adhesiveness is achieved by ether linkages resulting from the chemical reaction between glycerol and wood powder.…”
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    Article