Mostrando 441 - 460 Resultados de 30,407 Para Buscar 'Totalán~', tiempo de consulta: 2.92s Limitar resultados
  1. 441
    por Yang, Liyan, Wang, Zhonglei
    Publicado 2021
    “…The unique skeletons of aflatoxins and their risk to human health have led to the publication of nine remarkable total syntheses (including three asymmetric syntheses) and ten formal total syntheses (including four asymmetric formal syntheses) of aflatoxins in the past 55 years. …”
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  2. 442
    “…METHODS: A total of 140 patients who had undergone isolated elective total arch replacement between January 2007 and December 2020 were enrolled in the present study. …”
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  3. 443
  4. 444
  5. 445
    “…INTRODUCTION: Total rhinectomy is an uncommon procedure for the treatment of nasal malignancies, usually reserved for locally advanced tumors. …”
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  6. 446
  7. 447
    por Moya, Bienve
    Publicado 1996
    Libro
  8. 448
    por Allue, M.
    Publicado 1990
    Libro
  9. 449
  10. 450
    por Melgarejo Palmeros, José Luis
    Publicado 1994
    Tesis Libro
  11. 451
  12. 452
    “…We present herein a new synthetic strategy to access [2]rotaxanes, namely active-metal template clipping. We discuss the design of the target [2]rotaxanes, synthesis and characterization of the axle, macrocycle precursors and macrocycles as well as preparation of the final [2]rotaxanes by active template copper(I)-catalyzed alkyne–azide cycloaddition (CuAAC) as key step of the synthesis. …”
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  13. 453
    “…Here we describe two different approaches for the reversible switching of a double-stranded DNA rotaxane architecture from a stationary pseudorotaxane mode into a state with movable components. …”
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  14. 454
    “…We report the stepwise assembly of supramolecular daisy chain rotaxanes (DCR) made of double‐stranded DNA: Small dsDNA macrocycles bearing an axle assemble into a pseudo‐DCR precursor that was connected to rigid DNA stoppers to form DCR with the macrocycles hybridized to the axles. …”
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  15. 455
    por Neal, Edward A., Goldup, Stephen M.
    Publicado 2016
    “…This process iteratively increases the yield of the target heterocircuit [3]rotaxane product at the expense of other threaded species.…”
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  16. 456
    “…Template-instructed experiments show that the thread is capable of efficient self-replication and that no cross-catalytic relationships exist between the thread and the [2]rotaxane. The rate of [2]rotaxane formation is insensitive to the addition of a preformed template, however, [2]rotaxane formation does show enhanced diastereoselectivity, most likely originating from its recognition-mediated formation through a ternary reactive complex.…”
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  17. 457
    “…BACKGROUND: Lotilaner (Credelio™) is the newest member of the novel isoxazoline chemical class to be developed to treat canine ectoparasitism. …”
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  18. 458
  19. 459
    “…A novel functional [2]rotaxane containing two alkenyl bonds was designed, synthesized and characterized by (1)H, (13)C NMR spectroscopy and HRESI mass spectrometry. …”
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  20. 460
    “…[Image: see text] A rotaxane-based molecular shuttle has been synthesized in which the switching of the position of a fluorescent macrocycle on the thread turns “on” or “off” the circularly polarized luminescence (CPL) of the system while maintaining similar fluorescence profiles and quantum yields in both states. …”
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