Showing 221 - 240 results of 280 for search '"nuclear magnetic resonance"', query time: 0.08s Refine Results
  1. 221

    Purification and Characterization of a Low Molecular Weight Neutral Non-Starch Polysaccharide from Panax ginsen g by Enzymatic Hydrolysis by Ying Ying, Chao Ma, Yajie Zhang, Xiaoping Li, Hongxin Wu

    Published 2023-02-01
    “…Chemical characteristics, monosaccharide compositions and structure of GP1A were investigated using scanning electron microscopy, gel permeation chromatography, X-ray diffraction, Fourier transform infrared spectroscopy, gas chromatography with mass spectrometer, one-dimensional and two-dimensional nuclear magnetic resonance. The results indicated that the lyophilized GP1A was a homogeneous polysaccharide with a low molecular weight of 1.03 kDa. …”
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  2. 222

    Structural Characterization of Polygonum divaricatum L. Polysaccharide and Its Inhibitory Effect on Lipopolysaccharide-Induced Inflammation in RAW264.7 Cells by CUI Yanyan, YUAN Yongxu, GUO Mingkun, HE Wenbing, LI Ming, PEI Shichun, LI Dajun

    Published 2024-12-01
    “…Methods: The structure of PSPDL was characterized using high-performance gel permeation chromatography (HPGPC), high-performance liquid chromatography (HPLC), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and nuclear magnetic resonance spectroscopy (NMR). The in vitro anti-inflammatory activity and action mechanism of PSPDL were investigated in lipopolysaccharide (LPS)-induced RAW264.7 cells. …”
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  3. 223

    Potential of Co(II) and Cd(II) chelates of N′-(3-fluorobenzoyl)benzo[d]thiazole-2-carbohydrazide: Structural aspects, binding interactions, biological and molecular docking studies... by K. Srilaxmi, B. Sireesha

    Published 2025-01-01
    “…N′-(3-fluorobenzoyl)benzo[d]thiazole-2-carbohydrazide (MFBBTCH, HL) and its chelates with Co(II) and Cd(II) have been synthesized and characterized by elemental analyses, liquid chromatography-mass spectrometry (LC-MS), Fourier Transform Infrared Spectroscopy (FT-IR), ultra-violet visible (UV–vis), nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA) and conductivity measurements. …”
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  4. 224

    Experimental Study of the Flow Mechanism of Deep Lacustrine Carbonate Reservoirs in the Yingxi Area of the Qaidam Basin by Xiangrong Luo, Yongxian Zheng, Penggang Huang, Li’an Yang, Xiaodong Chen, Xiaojuan Ren, Guo Wang, Yanzhi Wang, Zhiguo Wang, Xiaoxiao Li

    Published 2022-01-01
    “…In contrast, the water phase relative permeability of the matrix core is less than 0.2. The nuclear magnetic resonance (NMR) transverse relaxation time (T2) spectra were used to analyze the differences between the water flooding characteristics of the two pore structures. …”
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  5. 225

    Recombinant production platform for Group A Streptococcus glycoconjugate vaccines by Sowmya Ajay Castro, Ian J. Passmore, Didier Ndeh, Helen Alexandra Shaw, Alessandro Ruda, Keira Burns, Sarah Thomson, Rupa Nagar, Kathirvel Alagesan, Mark Reglinski, Kieron Lucas, Sherif Abouelhadid, Ulrich Schwarz-Linek, Fatme Mawas, Göran Widmalm, Brendan W. Wren, Helge C. Dorfmueller

    Published 2025-01-01
    “…The structural integrity of the produced recombinant glycoconjugate vaccines was confirmed by Nuclear Magnetic Resonance (NMR) spectroscopy and mass spectrometry. …”
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    Article
  6. 226

    Kinetic Study on the Isothermal and Nonisothermal Crystallization of Monoglyceride Organogels by Zong Meng, Lijun Yang, Wenxin Geng, Yubo Yao, Xingguo Wang, Yuanfa Liu

    Published 2014-01-01
    “…The isothermal and nonisothermal crystallization kinetics of monoglyceride (MAG) organogels were studied by pulsed nuclear magnetic resonance (pNMR) and differential scanning calorimetry (DSC), respectively. …”
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  7. 227

    New Plastitar Record for the Mediterranean Sea: Characterization of Plastics and Tar from the Salento Peninsula (Ionian Sea) by Silvia Fraissinet, Emanuele Mancini, Chiara Funiati, Caterina Martino, Giuseppe Egidio De Benedetto, Chiara Roberta Girelli, Francesco Paolo Fanizzi, Genuario Belmonte, Stefano Piraino

    Published 2024-12-01
    “…Here, the composition of the 11 plastitar blocks collected on the Ionian side of the Apulia region (Italy) was characterized both in tar and plastics using nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared (FTIR) spectroscopy, respectively. …”
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  8. 228

    Antimicrobial Activity of Aspergillus sp. from the Amazon Biome: Isolation of Kojic Acid by Josy Caldas Rodrigues, Weison Lima da Silva, David Ribeiro da Silva, Carolina Rabelo Maia, Clarice Virginia Santos Goiabeira, Haile Dean Figueiredo Chagas, Gigliola Mayara Ayres D’Elia, Gleica Soyan Barbosa Alves, Viviane Zahner, Cecilia Veronica Nunez, Ormezinda Celeste Cristo Fernandes

    Published 2022-01-01
    “…The fractions of interest had their chemical constituents elucidated by nuclear magnetic resonance and mass spectrometry. The elucidated molecule was evaluated for cytotoxicity against the human fibroblast strain (MRC5). …”
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  9. 229

    Fuzzy Random Characterization of Pore Structure in Frozen Sandstone: Applying Improved Niche Genetic Algorithm by Yao Ya-feng, Lin Jian, Ge Jian, Peng Shi-long, Yin Jian-chao, Ouyang Li-na

    Published 2021-01-01
    “…Nuclear magnetic resonance (NMR) technology provides an innovative method employed in detecting the porous structures in frozen rock and soil masses. …”
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  10. 230

    Mechanistic studies on the effect of endogenous proteins on the starch retrogradation characteristics of corn before and after postharvest ripening by Nannan Hu, Weihua Qi, Jinying Zhu, Fuyin Zhao, Lin Xiu, Mingzhu Zheng, Jingsheng Liu

    Published 2025-01-01
    “…In addition, low field strength nuclear magnetic resonance (LF-NMR) analyses also revealed that proteins inhibited starch retrogradation by isolating the precipitation of free water during retrogradation, causing the decrease in the viscoelasticity and firmness of the starch gel. …”
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  11. 231

    Quantitative Characterization of Full-Spectrum Pore Size and Connectivity for Shale with Different Sedimentary Facies from the Dongying Depression, Bohai Bay Basin, East China by Yushan Du, Na Yin, Qinhong Hu, Mianmo Meng, Xiuchuan Zhu, Jing Chao, Cunfei Ma

    Published 2022-01-01
    “…The T2 spectra of nuclear magnetic resonance tests for the “high TOC laminated clayey marlstone” facies which contains abundant calcite laminae and organic matter-hosted pores commonly show three peaks, with a dominant peak at less than 300 nm in diameter and good pore connectivity. …”
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  12. 232

    Metabolic profile of blood serum in experimental arterial hypertension by A. A. Seryapina, A. A. Malyavko, Yu. K. Polityko, L. V. Yanshole, Yu. P. Tsentalovich, A. L. Markel

    Published 2023-09-01
    “…Using the method of nuclear magnetic resonance spectroscopy (NMR spectroscopy), 56 metabolites in blood serum samples were identified, 18 of which were shown to have significant interstrain differences in serum concentrations. …”
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  13. 233

    Multi-scale characterization of tight carbonate rocks based on digital cores by Changsheng Wang, Changsheng Wang, Lili Tian, Lili Tian, Chuanrui Sun, Chuanrui Sun, Yuwei Deng, Yuwei Deng, Ying Zhou, Ying Zhou, Xin Nie, Xin Nie

    Published 2025-01-01
    “…However, due to the complexity and heterogeneity of the pore structure of tight carbonate rocks, high-pressure mercury intrusion, nuclear magnetic resonance (NMR) and other methods have different limitations in the characterization. …”
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  14. 234

    Structural Characterization of Foxtail Millet (<i>Setaria italica</i>) Polysaccharides and Evaluation of Its Antioxidant and Immunostimulatory Activities by Haiying Zhang, Chengyu Peng, Wei Zhang, Huatao Liu, Xiaodong Liu, Changqing Sun, Xiaoning Cao

    Published 2025-01-01
    “…The structural characterization results obtained from gas chromatography–mass spectrometer (GC–MS) and nuclear magnetic resonance spectroscopy (NMR) spectra suggest that FM-D1 primarily consists of a main chain linked by →4)-α-D-Glc<i>p</i>-(1→ and minor quantities of →4,6)-α-D-Glc<i>p</i>-(1→ to form the main chain, with branching mainly composed of α-D-Glc<i>p</i>-(1→ attached to the <i>O</i>-6 position of →4,6)-α-D-Glc<i>p</i>-(1→ sugar residues. …”
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  15. 235

    Exploring Adsorption Performance of Functionalized Mesoporous Silicas with a Different Pore Structure as Strong Cation-Exchange Sorbents for Solid-Phase Extraction of Atropine and... by Fernando L. Vera-Baquero, Sonia Morante-Zarcero, Damián Pérez-Quintanilla, Isabel Sierra

    Published 2025-01-01
    “…The synthesized materials were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption–desorption, Fourier-transform infrared spectroscopy, <sup>29</sup>Si solid-state nuclear magnetic resonance spectroscopy, and elemental analysis. …”
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    Article
  16. 236

    Failure mechanics mechanisms and permeability stage evolution of limestone considering wave velocity and failure surface characteristics by Genshui Wu, Weijian Yu, Bao Pan, Chuangfeng Fang, Hanxiao Guo, Chao Zhang

    Published 2025-02-01
    “…The macro- and micro-mechanical behavior of rock failure under seepage conditions was investigated in this work on deep floor rock strata using experimental methods such as rock mechanics, wave velocity, and nuclear magnetic resonance. The results demonstrate that the original cracks in thin limestone are more developed and have a gully-like structure at the mesoscopic scale than those in Ordovician limestone. …”
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  17. 237

    Review on Phase Behavior in Tight Porous Media and Microscopic Flow Mechanism of CO2 Huff-n-Puff in Tight Oil Reservoirs by Yong Tang, Jiehong Tang, Qi Liu, Yong Wang, Zigang Zheng, Yingjie Yuan, Youwei He

    Published 2020-01-01
    “…The microscopic flow mechanism during CO2 huff-n-puff in tight porous media is complicated, and the impact of molecular diffusion, gas-liquid interaction, and fluid-rock interaction on multiphase flow is significant especially in tight porous media. Nuclear magnetic resonance (NMR) and molecular simulation are efficient methods to describe the microscopic flow in tight oil reservoirs, while the NMR is not cost-effective and molecular simulation needs to be improved to better characterize and model the feature of porous media. …”
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  18. 238

    Changing Characteristics of Sandstone Pore Size under Cyclic Loading by Jiaguang Kan, Guichen Li, Nong Zhang, Peng Wang, Changliang Han, Shun Wang

    Published 2021-01-01
    “…These characteristics were studied under different pressures, pore diameters, and pore throat size distribution laws using a UTM5540 electronic universal testing machine, magnetic resonance imaging scanning, and low field nuclear magnetic resonance spectroscopy with cyclic loading on yellow sandstone. …”
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  19. 239

    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. …”
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  20. 240

    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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    Article