Showing 281 - 300 results of 340 for search '"Nuclear magnetic resonance"', query time: 0.06s Refine Results
  1. 281

    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
  2. 282

    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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  3. 283

    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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    Article
  4. 284

    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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  5. 285

    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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    Article
  6. 286

    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
  7. 287

    Comprehensive characterization of higher order structure changes in methionine oxidized monoclonal antibodies via NMR chemometric analysis and biophysical approaches by Mingyue Li, Victor A. Beaumont, Shahajahan Akbar, Hannah Duncan, Arch Creasy, Wenge Wang, Kelly Sackett, Lisa Marzilli, Jason C. Rouse, Hai-Young Kim

    Published 2024-12-01
    “…In this study, we applied one- and two-dimensional (1D and 2D) nuclear magnetic resonance (NMR) spectroscopy coupled with chemometric analysis, as well as circular dichroism (CD), differential scanning calorimetry (DSC), and fluorescence spectroscopy as orthogonal methods, to characterize the impact of methionine (Met) oxidation on the HOS of an IgG1 mAb. …”
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    Article
  8. 288

    Model Analytical Development for Physical, Chemical, and Biological Characterization of Momordica charantia Vegetable Drug by Deysiane Oliveira Brandão, Geovani Pereira Guimarães, Ravely Lucena Santos, Fernando José de Lima Ramos Júnior, Karla Monik Alves da Silva, Fabio Santos de Souza, Rui Oliveira Macêdo

    Published 2016-01-01
    “…The herbal medicine raw material derived from the leaves and fruits in different particle sizes was analyzed using thermoanalytical techniques as thermogravimetry (TG) and differential thermal analysis (DTA), pyrolysis coupled to gas chromatography/mass spectrometry (PYR-GC/MS), and nuclear magnetic resonance (1H NMR), in addition to the determination of antimicrobial activity. …”
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  9. 289

    Investigation of 4-Nitro-N, N-diphenylaniline as a chemical tracer under high pressure high temperature reservoir conditions for enhanced oil recovery applications by Subhadip Maiti, Nishant Kumar Choudhary, Kiran R. Gore, Sandeep D. Kulkarni

    Published 2025-02-01
    “…The purity of the synthesised N-TPA was first confirmed to be greater than 98% based on nuclear magnetic resonance (NMR) analysis. Ultraviolet (UV) and high-performance liquid chromatography (HPLC) techniques were established to measure the ppm-level concentrations of 4-FBA and N-TPA in the standard brine solutions. …”
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    Article
  10. 290

    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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  11. 291

    Use of Autologous Mesenchymal Stem Cells Derived from Bone Marrow for the Treatment of Naturally Injured Spinal Cord in Dogs by Euler Moraes Penha, Cássio Santana Meira, Elisalva Teixeira Guimarães, Marcus Vinícius Pinheiro Mendonça, Faye Alice Gravely, Cláudia Maria Bahia Pinheiro, Taiana Maria Bahia Pinheiro, Stella Maria Barrouin-Melo, Ricardo Ribeiro-dos-Santos, Milena Botelho Pereira Soares

    Published 2014-01-01
    “…The animals were clinically evaluated and examined by nuclear magnetic resonance. Ten days after the surgical procedure and MSC transplantation, we observed a progressive recovery of the panniculus reflex and diminished superficial and deep pain response, although there were still low proprioceptive reflexes in addition to a hyperreflex in the ataxic hind limb movement responses. …”
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  12. 292

    Dielectric spectroscopy and TD-NMR investigation for assessing water solid dynamics in normal and wooden breast chicken by Francesca Soglia, Eleonora Iaccheri, Luca Laghi, Luigi Ragni, Pedro José Fito Suñer, Massimiliano Petracci

    Published 2025-01-01
    “…Dielectric Spectroscopy (DS) and TimeDomain-Nuclear Magnetic Resonance (TD-NMR) were exploited to investigate water and solid dynamics in chicken's Pectoralis major muscles having macroscopically normal appearance (N) and affected by Wooden Breasts (WB) abnormality. 147 PMM were collected and classified as macroscopically normal (N) (N=74) or Wooden Breast (WB) (N=73) based on their visual appearance and manual palpation. …”
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  13. 293

    The Frequency and Associated Factors of Asymmetrical Prominent Veins: A Predictor of Unfavorable Outcomes in Patients with Acute Ischemic Stroke by Yue Wang, Jingjing Xiao, Li Zhao, Shaoshi Wang, Mingming Wang, Yu Luo, Huazheng Liang, Lingjing Jin

    Published 2021-01-01
    “…The volume of asymmetrical prominent veins (APV) was evaluated using the Signal Processing In nuclear magnetic resonance software (SPIN, Detroit, Michigan, USA). …”
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  14. 294

    Combination model for freshness prediction of pork using VIS/NIR hyperspectral imaging with chemometrics by Minwoo Choi, Hye-Jin Kim, Azfar Ismail, Hyun-Jun Kim, Heesang Hong, Ghiseok Kim, Cheorun Jo

    Published 2025-01-01
    “…Metabolic contents of the sample were quantified using nuclear magnetic resonance. Results A total of 64 metabolites were identified, with 34 and 35 showing high correlations with TBC and VBN, respectively. …”
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    Article
  15. 295

    Multi-biofluid metabolomics analysis of allergic respiratory rhinitis and asthma in early childhood by Chih-Yung Chiu, MD, PhD, Meng-Han Chiang, MS, Chieh-Ni Kuo, BS, Mei-Ling Cheng, PhD, Gigin Lin, MD, PhD

    Published 2025-01-01
    “…Fecal, blood, and urine metabolomic analyses using 1H nuclear magnetic resonance (NMR) spectroscopy were conducted. …”
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    Article
  16. 296

    Divergent Adsorption Regulation in Metal–Organic Frameworks for Highly Efficient CF4/C2F6 Separation by Guihong Xu, Tian Ke, Rongrong Fan, Kaiyuan Tan, Wenjun Zhang, Baogen Su, Zhiguo Zhang, Zongbi Bao, Qilong Ren, Qiwei Yang

    Published 2025-01-01
    “…Comprehensive insights into the unique separation mechanism are illustrated through a combination of solid‐state MAS nuclear magnetic resonance (SSNMR), molecular simulations, and meticulously designed comparative experiments. …”
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    Article
  17. 297

    Association of ultra-processed food-related metabolites with selected biochemical markers in the UK Biobank by Anthony Kityo, Byeonggeun Choi, Jung-Eun Lee, Chulho Kim, Sang-Ah Lee

    Published 2025-01-01
    “…Methods Cross-sectional study within the UK biobank, including a total of 72,817 participants with 24-hour recall dietary data and 134 nuclear magnetic resonance metabolites. UPF and UNPF intakes were evaluated using the NOVA classification, and related metabolites were identified using elastic net penalized regression. …”
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    Article
  18. 298

    Ginkgo biloba extract EGb761 mitigates ischemic stroke via metabolic pathway modulation by Xiaoyao Liu, Yuan Tian, Wenhui Xu, Yuxi Wang, Zhen Liu, Yuncheng Ma, Weiling Wang, Jian Gao, Ting Wang

    Published 2025-01-01
    “…Serum metabolites were analyzed using 1H-nuclear magnetic resonance to elucidate the operative mechanism. …”
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    Article
  19. 299

    Computational and experimental exploration of morpholine pendent 2-hydrazineyl thiazole: Insights from DFT, ADME profiling, antifungal efficacy and molecular docking analyses by Vishnu A. Adole, I.Antony Danish, J.Jebasingh Kores, J.Winfred Jebaraj, S. Janani, Suresh K. Ghotekar, Rakesh D. Amrutkar

    Published 2025-01-01
    “…Chemical shifts were precisely assigned using Nuclear Magnetic Resonance (NMR) analysis. Furthermore, the ADME analysis predicted favorable pharmacokinetic properties. …”
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  20. 300

    Axial pressure impact on pyrolysis behavior of Xinjiang coal: An inspiration for in-situ pyrolysis of tar-rich coal by Bingyang Kou, Qingmin Shi, Shuangming Wang, Qiang Sun, Shidong Cui, Xiaolong Yang, Xinyue Zhao, Junwei Qiao

    Published 2025-03-01
    “…The variation of pore structure and volatiles was studied using low-field nuclear magnetic resonance and gas chromatography. Results indicated that pore structure and tar-gas composition evolved synergistically, and presented staged characteristics during pyrolysis under axial stress. 10.0–17.5 MPa, coals compressed to breakage, enhancing pore-fracture connectivity and convective heat transfer during pyrolysis. …”
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    Article