Showing 21 - 40 results of 61 for search '"nuclear magnetic resonance spectroscopy"', query time: 0.07s Refine Results
  1. 21

    Characterization of Jamaican Delonix regia and Cassia fistula Seed Extracts by Andrea Goldson Barnaby, Raymond Reid, Vaughn Rattray, Ruth Williams, Marcel Denny

    Published 2016-01-01
    “…Lipid extracts were characterized by nuclear magnetic resonance spectroscopy and gas chromatography/mass spectrometry. …”
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  2. 22

    Polymerization and modeling of phenolic resins from crude wood resin in the presence of AlCl3 by Ömür Aras, Murat Ertaş, Muhammed Yusuf Aksakal, Naile Angın, Merve Genç

    Published 2024-12-01
    “…The synthesized TRFR samples were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance Spectroscopy (NMR), acid number, saponification number and softening point analyses. …”
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  3. 23

    A Novel Paramagnetic Substrate for Detecting Myeloperoxidase Activity in Vivo by Mohammed S. Shazeeb, Yang Xie, Suresh Gupta, Alexei A. Bogdanov

    Published 2012-09-01
    “…Characterization of the resulting probe (bis-HTrp-DTPA(Gd)) in vitro using nuclear magnetic resonance spectroscopy and enzyme kinetic analysis showed that bis-HTrp-DTPA(Gd) (1) improves solubility in water; (2) acts as a substrate for both horseradish peroxidase and MPO enzymes; (3) induces cross-linking of proteins in the presence of MPO; (4) produces oxidation products, which bind to plasma proteins; and (5) unlike bis-5HT-DTPA(Gd), does not follow first-order reaction kinetics. …”
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  4. 24

    Physicochemical Characterization of Thermally Treated Chitosans and Chitosans Obtained by Alkaline Deacetylation by Ana Maria de Oliveira, Telma Teixeira Franco, Enio Nazaré de Oliveira Junior

    Published 2014-01-01
    “…The thermal depolymerization of chitosan and alkaline deacetylation of chitin were characterized by measurement of viscosity, gel permeation chromatography (GPC), potentiometric titration (PT), and proton nuclear magnetic resonance spectroscopy (H1 NMR). The depolymerization rates (DR) measured by kinematic viscosity (KV), apparent viscosity (AV), and GPC (Mw) until 4 h of treatment were DRKV=21.9, DRAV=25.5, and DRMw=23.3% h-1 and for 5 to 10 h of treatment they decreased slowly to produce of DRKV=0.545, DRAV=0.248, and DRMw=1.11% h-1. …”
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  5. 25

    Keggin-Type Heteropolyacid for Ring-Opening Polymerization of Cyclohexene Oxide: Molecular Weight Control by Ahmed Aouissi, Zeid Abdullah Al-Othman, Abdurrahman Salhabi

    Published 2015-01-01
    “…The resulting poly(1,2-cyclohexene oxide) (PCHO) was characterized by Fourier transform infrared (FTIR), nuclear magnetic resonance spectroscopy (1HNMR), gel-permeation chromatography (GPC), and differential scanning calorimetry (DSC). …”
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  6. 26

    Glucomannan engineering highlights roles of galactosyl modification in fine-tuning cellulose-glucomannan interaction in Arabidopsis cell walls by Yoshihisa Yoshimi, Li Yu, Rosalie Cresswell, Xinyu Guo, Alberto Echevarría-Poza, Jan J. Lyczakowski, Ray Dupree, Toshihisa Kotake, Paul Dupree

    Published 2025-01-01
    “…Biochemical analysis and 13C solid-state nuclear magnetic resonance spectroscopy of Arabidopsis with cell wall glucomannan engineered by MAGTs reveal that the degree of galactosylation strongly affects the interaction with cellulose. …”
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  7. 27

    Synthesis of Cationic Waterborne Polyurethanes from Waste Frying Oil as Antibacterial Film Coatings by Sivaphol Phunphoem, Onusa Saravari, Pitt Supaphol

    Published 2019-01-01
    “…CWPUs were successfully synthesized as confirmed by proton nuclear magnetic resonance spectroscopy (1H-NMR) and Fourier transform infrared spectroscopy (FT-IR). …”
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  8. 28

    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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  9. 29

    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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  10. 30

    Enhanced Electrochemical Sensor for Electrocatalytic Glucose Analysis in Orange Juices and Milk by the Integration of the Electron-Withdrawing Substituents on Graphene/Glassy Carbo... by Rahadian Zainul, Illyas Md Isa, Siti Nur Akmar Mohd Yazid, Norhayati Hashim, Sharifah Norain Mohd Sharif, Mohamad Idris Saidin, Mohamad Syahrizal Ahmad, M.Si Suyanta, Yulkifli Amir

    Published 2022-01-01
    “…The results of characterizations using a scanning electron microscope, Fourier transform infrared spectroscopy, Raman spectroscopy, and nuclear magnetic resonance spectroscopy showed the successful fabrication of HPMpFP-graphene nanocomposite, which served as an electroactive probe for glucose detection. …”
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  11. 31

    3-Methyl-4-Nitrobenzoate Derivates as Antifungal Drug Candidates: Biological and In Silico Evaluation by Alana R. Ferreira, Yunierkis P. Castillo, Ana C. M. Andrade, Diego F. Nóbrega, João Paulo G. de Oliveira, Tamires C. Lima, Ricardo D. de Castro, Damião P. de Sousa

    Published 2025-01-01
    “…The chemical structure of the obtained products was confirmed using Infrared, 1H and APT-13C nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry. …”
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  12. 32

    Quantitative Analysis of Flavonoids in Glycyrrhiza uralensis Fisch by 1H-qNMR by Ping Yu, Qian Li, Yanmei Feng, Yuying Chen, Sinan Ma, Xiaoqin Ding

    Published 2021-01-01
    “…It lays a foundation for the study on the determination of flavonoids content in licorice by proton nuclear magnetic resonance spectroscopy.…”
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  13. 33

    Structural characterization and immunostimulatory activity of a water-soluble polysaccharide from abalone (Haliotis discus hannai Ino) muscle by Linfan Shi, Gengxin Hao, Jun Chen, Junling Wang, Wuyin Weng

    Published 2023-03-01
    “…The structural characteristics of AMPP were elucidated through methylation analysis, Fourier transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy. The linkages of AMPP consisted of terminal, 1,4-linked, 1,6-linked, and 1,4,6-linked Glcp with a molar ratio of 3.1:7.2:1.0:2.5. …”
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  14. 34

    Study of Macro- and Mesodamage of Remolded Loess under Alternating Dry and Wet Conditions in an Acid Rain Environment by Wanjun Ye, Yuntao Wu, Yang Bai

    Published 2021-01-01
    “…Considering the influence of acid rain on the engineering characteristics of loess in this area, we investigated changes in the physical and mechanical characteristics of remolded loess under the combined action of acid rain and dry-wet cycles by means of triaxial tests, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. …”
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  15. 35

    Brain metabolites in ISIAH and Wistar rats by O. B. Shevelev, A. A. Seryapina, A. L. Markel, M. P. Moshkin

    Published 2015-12-01
    “…Due to the development of nuclear magnetic resonance spectroscopy (NMRS), a decrease in neuron viability in different parts of the brain in humans with hypertension has been shown. …”
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  16. 36

    Azurin a potent anticancer and antimicrobial agent isolated from a novel Pseudomonas aeruginosa strain by Nourhan A. Zaghloul, Mona K. Gouda, Yasser Elbahloul, Nancy M. El Halfawy

    Published 2025-01-01
    “…The partially purified azurin protein was characterized using polyacrylamide gel electrophoresis, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and nuclear magnetic resonance spectroscopy. Notably, qualitative elemental analysis by EDX showed the presence of copper and sulfur, corresponding to the copper-core and disulfide-bridge, respectively, in the purified azurin fraction. …”
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  17. 37

    Impact of glycolysis inhibitor (2-DG) and oxidation and phosphorylation uncoupler (2,4-DNP) on brain metabolites by O. B. Shevelev, M. P. Moshkin

    Published 2018-04-01
    “…Some clinical studies using proton nuclear magnetic resonance spectroscopy (1H NMR spectroscopy) revealed metabolic changes in brain tissue in patients with neurodegenerative diseases. …”
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  18. 38

    Influence of Hydroxypropyl-β-Cyclodextrin on the Photostability of Fungicide Pyrimethanil by Carlos Fernandes, Igor Encarnação, Alexandra Gaspar, Jorge Garrido, Fernanda Borges, E. Manuela Garrido

    Published 2014-01-01
    “…In this study, the inclusion complex of pyrimethanil with HP-β-CD has been prepared and characterized by proton nuclear magnetic resonance spectroscopy. The formation of the pyrimethanil/HP-β-CD inclusion complex increased the aqueous solubility of this fungicide around five times. …”
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  19. 39

    Synthesis and Evaluation of In Vitro Antibacterial and Antitumor Activities of Novel N,N-Disubstituted Schiff Bases by Heng Luo, Yu-fen Xia, Bao-fei Sun, Li-rong Huang, Xing-hui Wang, Hua-yong Lou, Xu-hui Zhu, Wei-dong Pan, Xiao-dong Zhang

    Published 2017-01-01
    “…We used the reaction between salicylaldehyde and different diamine compounds, including diamine, ethanediamine, and o-phenylenediamine, determining the structure of obtained molecules by nuclear magnetic resonance spectroscopy and electrospray ionization mass spectroscopy. …”
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  20. 40

    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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