Showing 61 - 80 results of 159 for search '"NMR spectroscopy"', query time: 0.06s Refine Results
  1. 61

    Structure-based insights into fluorogenic RNA aptamers by Song Qianqian, Tai Xiaoqing, Ren Qianyu, Ren Aiming

    Published 2024-08-01
    “…To date, a variety of tertiary structures of fluorogenic RNA aptamers have been determined using X-ray crystallography or NMR spectroscopy. Many of these fluorogenic RNA aptamers feature base quadruples or base triples in their fluorophore-binding sites. …”
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    Article
  2. 62

    Synthesis, Characterization, and Agricultural Biological Activities of 5-Fluoro-2-hydroxy Butyrophenone by Fengli Xin, Chunhua Du, Gongjia Lan, Zhuanping Wu

    Published 2013-01-01
    “…The structure was characterized by the melting point and IR, MS, 1H-NMR, and 13C-NMR spectroscopy. The bioassay results indicate that the target compound exhibits potent antifungal activities against Valsa mali, Coniella dipodiella, and other agricultural plant fungi. …”
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  3. 63

    Obtaining and Investigation of the β-Cyclodextrin Inclusion Complex with Vitamin D3 Oil Solution by Ryszhan Bakirova, Altynbek Nukhuly, Ainara Iskineyeva, Serik Fazylov, Meiram Burkeyev, Ayaulym Mustafayeva, Yelena Minayeva, Akmaral Sarsenbekova

    Published 2020-01-01
    “…The inclusion complex spectral properties were characterized by IR-Fourier and 1H and 13C NMR spectroscopy. The existence of β-cyclodextrin inclusion complex with vitamin D3 in a 2 : 1 ratio was confirmed by the experimental results. …”
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    Article
  4. 64

    Ethylene-Vinyl Acetate Copolymer/Crude Gossypol Compositions as Pour Point Depressants for Waxy Oil by Bekaidar T. Marenov, Kazim S. Nadirov, Manap K. Zhantasov, Rashid K. Nadirov

    Published 2020-01-01
    “…Prepared compositions were characterized by Fourier transform infrared (FTIR), ultraviolet (UV), and nuclear magnetic resonance (NMR) spectroscopy. The pour point and viscosity of the crude oil from the Akshabulak oil field (Kazakhstan) were studied. …”
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    Article
  5. 65

    Molecular Architectures Derived from Metal Ions and the Flexible 3,3′-Bipyridine Ligand: Unexpected Dimer with Hg(II) by Anupam Khutia, Pablo J. Sanz Miguel, Bernhard Lippert

    Published 2010-01-01
    “…With trans-(NH3)2Pt2+, different species are formed according to 1H NMR spectroscopy, the nature of which was not established.…”
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  6. 66

    Base-Catalyzed Polymerization of a Substituted Methylenebicyclo[3.3.1]nonane by Sujeet Kumar Thakur, Seera Raviteja, Tayur N. Guru Row, Sambasivan Venkat Eswaran

    Published 2023-01-01
    “…The novelty of our work is that we have characterized the precise molecular weights based on mass spectrometry and NMR spectroscopy along with a well-defined structure. This is not the case in most other publications.…”
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  7. 67

    Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments. by Jay Capasso, Jehangir H Bhadha, Allan Bacon, Lilit Vardanyan, Raju Khatiwada, Julio Pachon, Mark Clark, Timothy Lang

    Published 2020-01-01
    “…Fractions of P were determined using a sequential fractionation experiment and 31P Nuclear Magnetic Resonance (NMR) Spectroscopy. Larger average particle size and lower average total P concentrations were found in the inflows of the field ditches compared to the outflows. …”
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    Article
  8. 68

    Influence of Different Extraction Methods on the Changes in Bioactive Compound Composition and Antioxidant Properties of Solid-State Fermented Coffee Husk Extracts by Rossaporn Jiamjariyatam, Pakkapong Phucharoenrak, Siritron Samosorn, Kulvadee Dolsophon, Wanlapa Lorliam, Sukhumaporn Krajangsang, Prapakorn Tantayotai

    Published 2023-01-01
    “…Bioactive contents were investigated with the Folin–Ciocalteu assay and 1H-NMR spectroscopy. The antioxidant activity was investigated with DPPH and FRAP assays. …”
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    Article
  9. 69

    Advances in Research on the Interaction of Food-derived Polysaccharide and Polyphenol by Jun HE, Mengdie WANG, Xiaoqiang CHEN, Miaomiao YING

    Published 2025-02-01
    “…This paper describes the means of characterizing food-derived polysaccharide and polyphenol interactions, including Fourier transform infrared (FT-IR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy, and interaction mechanisms such as enzyme-catalyzed reactions and free radical-induced reactions was also summarized. …”
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    Article
  10. 70

    Synthesis and characterization of novel functional vinyl ethers that bear various groups by Fayad, Antoinette, El Malti, Wassim, Ameduri, Bruno, Alaaeddine, Ali

    Published 2022-02-01
    “…All VEs were characterized using $^{1}$H and $^{13}$C NMR spectroscopy.…”
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  11. 71

    Contact ion-pair SN2 reactions activated by Lewis Base Phase transfer catalysts by Ju Gyeong Jeong, Young-Ho Oh, Tae Hyun Park, Sung-Sik Lee, Dong Wook Kim, Sungyul Lee

    Published 2025-01-01
    “…Abstract We present experimental probes of contact ion-pair (CIP) SN2 reactions for simplest prototype systems by 19F-NMR spectroscopy. This study provides crucial evidences for the reactions of CIP metal salts facilitated by Lewis base phase transfer catalysts (PTCs) [2,2,2]-cryptand, 18-crown-6, pentaethylene glycols (pentaEGs) and BINOL–based pentaEG. …”
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  12. 72

    Influence of Polyphosphoric Acid on the Consistency and Composition of Formulated Bitumen: Standard Characterization and NMR Insights by Catarina Varanda, Inês Portugal, Jorge Ribeiro, Artur M. S. Silva, Carlos M. Silva

    Published 2016-01-01
    “…Afterwards, the five components and the unmodified and PPA-modified bitumen were characterized by standard methods (penetration, softening point, and penetration index), SARA analysis, elemental analysis, and 31P and 1H nuclear magnetic resonance (NMR) spectroscopy. The results evidenced higher asphaltenes and lower saturates/resins contents in PPA-modified bitumen. …”
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  13. 73

    Chromatographic and Spectral Analysis of Two Main Extractable Compounds Present in Aqueous Extracts of Laminated Aluminum Foil Used for Protecting LDPE-Filled Drug Vials by Samuel O. Akapo, Sajid Syed, Anicia Mamangun, Wayne Skinner

    Published 2009-01-01
    “…By means of combined HPLC-UV, GC/MS, LC/MS/MS, and NMR spectroscopy, the two major compounds detected in the aqueous extracts of the representative commercial overwraps were identified as cyclic oligomers with molecular weights of 452 and 472 and are possibly formed from poly-condensation of the adhesive components, namely, isophthalic acid, adipic acid, and diethylene glycol. …”
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  14. 74

    Effects of Different Blanching Methods and Freezing Rates on Textural Properties of Prepared Broccoli by ZHAO Yinuo, JIN Xin, BI Jinfeng, XIE Yitong, DU Ting

    Published 2025-01-01
    “…Low-field nuclear magnetic resonance (LF-NMR) spectroscopy and physicochemical analysis were used to evaluate the water distribution, water-holding capacity (WHC), electrical conductivity, and hardness of broccoli samples subjected to hot water or steam blanching followed by freezing at −20, −40, and −80 ℃. …”
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  15. 75

    The Development and Application of Novel IR and NMR-Based Model for the Evaluation of Carminative Effect of Artemisia judaica L. Essential Oil by Muhammed Alzweiri, Ibrahim M. Alrawashdeh, Sanaa K. Bardaweel

    Published 2014-01-01
    “…Additionally, 1H-NMR spectroscopy was utilized to assess surface activity of A. judaica crude oil through the reduction of interfacial tension in a D2O/CDCl3 system. …”
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    Article
  16. 76

    New Bioactive Metabolites from the Thermophilic Fungus Penicillium sp. Isolated from Ghamiqa Hot Spring in Saudi Arabia by Raha Orfali, Shagufta Perveen

    Published 2019-01-01
    “…The structures of the new compounds were unambiguously determined by comprehensive analysis of spectroscopic data, one- and two-dimensional NMR spectroscopy, and high-resolution mass spectrometry. …”
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  17. 77

    Ferrocene-Based Bioactive Bimetallic Thiourea Complexes: Synthesis and Spectroscopic Studies by Shafqat Ali, Ghulam Yasin, Zareen Zuhra, Zhanpeng Wu, Ian S. Butler, Amin Badshah, Imtiaz ud Din

    Published 2015-01-01
    “…Bioactive 1,1′-(4,4′-di-ferrocenyl)di-phenyl thiourea and various metal complexes of this ligand have been successfully synthesized and characterized by using physicoanalytical techniques such as FT-IR and multinuclear (1H and 13C) NMR spectroscopy along with melting point and elemental analyses. …”
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    Article
  18. 78

    Hierarchically Structured Stimuli-Responsive Liquid Crystalline Terpolymer–Rhodamine Dye Conjugates by Samiksha Vaidya, Meenakshi Sharma, Christian Brückner, Rajeswari M. Kasi

    Published 2025-01-01
    “…We probed their composition, morphology, thermal, mechanic, photochromic, and mechanochromic properties using, inter alia, <sup>1</sup>H NMR spectroscopy, DSC, temperature-dependent SAXS, diffuse reflectance UV-vis spectroscopy, and optical polarization microscopy. …”
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  19. 79

    Spectroscopic Characteristics of Dissolved Organic Matter in Afforestation Forest Soil of Miyun District, Beijing by Shi-Jie Gao, Chen Zhao, Zong-Hai Shi, Jun Zhong, Jian-Guo Liu, Jun-Qing Li

    Published 2016-01-01
    “…The DOM in the soil samples with different afforestation time was further characterized via DOC, UV-Visible spectroscopy, excitation-emission matrix (EEM) fluorescence spectroscopy, and 1H NMR spectroscopy. The results suggested that the texture of soil sample was sandy. …”
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    Article
  20. 80

    Proteomics and Its Current Application in Biomedical Area: Concise Review by Semira Gobena, Bemrew Admassu, Mebrie Zemene Kinde, Abebe Tesfaye Gessese

    Published 2024-01-01
    “…Various sophisticated techniques are employed in proteomics, including polyacrylamide gel electrophoresis, mass spectrometry analysis, NMR spectroscopy, protein microarray, X-ray crystallography, and Edman sequencing. …”
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    Article