Mostrando 321 - 340 Resultados de 441 Para Buscar '"dosis"', tiempo de consulta: 0.13s Limitar resultados
  1. 321
    “…In this study we have found that l-histidine self-assembled in water to form nano sheet structures at physiological pH and temperature, using 1D (1)H NMR spectroscopy, diffusion ordered spectroscopy (DOSY) and scanning electron microscope (SEM) techniques. …”
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  2. 322
    “…Their thermal cycloreversion and (repeated) switchability was demonstrated. 1,3‐Bis{1,8‐bis[(trimethylstannyl)ethynyl]anthracen‐10‐yl}propane served as model compound for photo‐switchable acceptor molecules and its open and closed forms were characterized by NMR and DOSY experiments.…”
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  3. 323
    por Tu, Tsung-Han, Chan, Yi-Tsu
    Publicado 2020
    “…The metallo-supramolecular poly(3-hexylthiophene) (P3HT)-block-PS diblock copolymers were prepared by simply mixing the corresponding terminally tpy-modified homopolymers with Zn(II) ions, and further characterized by (1)H NMR and diffusion ordered spectroscopy (DOSY) experiments. The approach using metallo-initiators for ATRP offers an opportunity to construct tpy-functionalized polymers with controllable molecular weights and low polydispersities. …”
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  4. 324
    “…Here we investigate such ligand interactions by exploiting diffusion ordered NMR spectroscopy (DOSY), which is suggested as an essential complement to spectral line width analysis. …”
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  5. 325
    “…The purpose of this study is to compare via nuclear magnetic resonance (NMR) spectroscopy the efficiency of silylated-acetylated α-, β-, and γ-cyclodextrins in the chiral discrimination of 1,1,1,3,3-pentafluoro-2-(fluoromethoxy)-3-methoxypropane (compound B) and methyl 2-chloropropionate (MCP). NMR DOSY (Diffusion Ordered SpectroscopY) experiments were conducted for the determination of the bound molar fractions and the association constants, whereas ROESY (Rotating-frame Overhauser Enhancement SpectroscopY) measurements provided information on the hosts’ conformation and on the interaction phenomena with the guests. …”
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  6. 326
    “…The gradual closure of the dendrimer structure observed at high pH values makes it difficult for the 5FU molecules to migrate to the interior of the support structure, thereby promoting drug immobilization on the surface. The (1)H NMR and DOSY spectra indicate that electrostatic interactions determine the complex formation process. …”
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  7. 327
  8. 328
    “…Further chemical characterization of the poor quality ECP samples included the identification of the excipients by 2D Diffusion-Ordered Nuclear Magnetic Resonance Spectroscopy (DOSY (1)H NMR) indicating the presence of lactose and magnesium stearate.…”
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  9. 329
    “…Quantitative difference spectra were obtained by subtracting the diffusion ordered spectroscopy (DOSY) spectra from the quantitative (1)H NMR spectra. …”
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  10. 330
    “…In contrast to most of the previously published cluster compounds with more than a hundred heavy atoms, this nanoscale inorganic molecule is soluble in organic solvents, which allowed a comprehensive investigation in solution by UV-Vis spectroscopy and one- and two-dimensional NMR spectroscopy including (31)P/(109)Ag-HSQC and DOSY experiments. These are the first heteronuclear NMR investigations on coinage metal chalcogenides. …”
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  11. 331
  12. 332
    “…Herein we describe, for the first time, a squaramide-based ion pair receptor equipped with a crown ether site that is able to extract potassium sulfate from the aqueous to the organic phase (an analogous monotopic anion receptor lacking the crown ether unit lacks this ability). (1)H NMR, UV-vis, DOSY-NMR, DLS, and MS experiments and the solid-state single crystal structure provided evidence of the formation of a supramolecular core–shell like assembly upon interaction of the receptor with potassium sulfate. …”
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  13. 333
    “…Proton nuclear magnetic resonance spectroscopy ((1)H NMR), (13)C NMR, IR, and diffusion-ordered (1)H NMR spectroscopy (DOSY) methods were used to characterize the structure of 1. …”
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  14. 334
    “…DPPC:cholesterol were further validated using DOSY NMR experiments. Interestingly, our results suggest a significant role of cholesterol in the AT1R function imposed through a Cholesterol Consensus Motif (CCM) in the receptor, which could be crucial in the drug binding process. …”
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  15. 335
    “…The three compounds were fully characterized 1) in the solid state by single‐crystal and powder XRD, IR, TGA, and solid‐state (1)H and (13)C NMR spectroscopy, 2) in solution by (1)H, (13)C NMR and (1)H DOSY spectroscopic methods, and 3) in the gas phase by electrospray ionization mass spectrometry (ESI‐MS).…”
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  16. 336
    “…Self-diffusion coefficients on this set of olive oils and vegetable oil samples were measured by means of the (1)H NMR diffusion ordered spectroscopy (DOSY) technique, showing that, except for the macadamia oil, other vegetable oils are characterized by an average diffusion coefficient sensibly different from extra-virgin olive oils. …”
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  17. 337
    “…Moreover, the adducts of zinc porphyrin and supramolecules were investigated and characterized by 2D DOSY, ESI-MS, TWIM-MS, UV-vis, and fluorescence spectroscopy. …”
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  18. 338
    “…Variable‐temperature NMR experiments, in combination with diffusion ordered spectroscopy (DOSY) revealed that one of the complexes underwent a temperature‐dependent interconversion between a monomer, a dimer and a higher aggregate. …”
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  19. 339
    “…Concentration‐dependent and diffusion ordered (DOSY) NMR experiments of O(1) ‐iV‐Fla‐S(3) indicate the formation of columnar H‐aggregates in solution with antiparallel intracolumnar stacking of the AC unit (chromylium) of the flavylium triflate, in agreement with the solid state structure of O(1) ‐V‐Fla‐S(1) . …”
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  20. 340
    “…The $^1$H and $^{23}$Na 1D and $^1$H DOSY NMR spectra revealed that the presence of small quantities of NaCl does not influence the aggregation of water molecules in the IL nano-domains. …”
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