Mostrando 1,061 - 1,080 Resultados de 4,830 Para Buscar '"quantum mechanics"', tiempo de consulta: 0.20s Limitar resultados
  1. 1061
  2. 1062
    por Guo, Dezhou, Wang, Hongwei, Shen, Yidi, An, Qi
    Publicado 2020
    “…To achieve an atomistic-level understanding of the diffusion and decomposition of trapped molecules in clathrate hydrate, we used methane hydrates (MHs) as the prototype system and examined the methane diffusion and decomposition mechanism by employing quantum mechanics (QM) and quantum mechanics molecular dynamics (QMD) simulations. …”
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  3. 1063
    por Di Biagio, Andrea, Rovelli, Carlo
    Publicado 2022
    “…In recent works, Časlav Brukner and Jacques Pienaar have raised interesting objections to the relational interpretation of quantum mechanics. We answer these objections in detail and show that, far from questioning the viability of the interpretation, they sharpen and clarify it.…”
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  4. 1064
  5. 1065
  6. 1066
  7. 1067
  8. 1068
  9. 1069
  10. 1070
  11. 1071
    “…In this study, with the aim of predicting the acetonitrile pK(a)’s (pK(a(MeCN))) of eight drug-like thiazol-2-imine derivatives, we propose a very accurate and computationally affordable protocol by using several quantum mechanical approaches. Benchmark studies were conducted on a set of training molecules, which were selected from the literature with known pK(a(water)) and pK(a(MeCN)). …”
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  12. 1072
  13. 1073
    por Pedersen, L
    Publicado 1985
    “…The recent literature on the determination of minimum energy conformations by ab initio quantum mechanical techniques is reviewed. The availability of computer-coded analytical first and second derivatives of the Hartree-Fock energy makes possible calculations that will be of significant assistance in structure determination of molecules. …”
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  14. 1074
  15. 1075
  16. 1076
  17. 1077
    “…These approaches share the use of “enhanced”, dispersion (D), and/or hydrogen-bond (H) corrected density functional theory (DFT) or semi-empirical quantum mechanical (SQM) methods, in combination with ensemble weighting techniques of some form to capture entropic effects. …”
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  18. 1078
    “…Our research suggests that lithium's solvation free energy is dominated by the free energetics of a charged hard sphere, whereas fluoride exhibits significant quantum mechanical behavior that cannot be simply described with a reduced model.…”
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  19. 1079
  20. 1080
    “…The proposed catalytic cycle of PSP consists of a two-step mechanism: formation of a phospho-enzyme intermediate by phosphate transfer to Asp11 and its subsequent hydrolysis. Our combined quantum mechanical/molecular mechanical (QM/MM) calculations of the reaction pathways favour a dissociative mechanism of nucleophilic substitution via a trigonal-planar metaphosphate-like configuration for both steps, associated with proton transfer to the leaving group or from the nucleophile. …”
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