Mostrando 3,641 - 3,660 Resultados de 99,129 Para Buscar '" metal"', tiempo de consulta: 0.43s Limitar resultados
  1. 3641
    “…Complexes bearing electron rich transition metal centers, especially those displaying coordinative unsaturation, are well-suited to form reverse-dative σ-interactions with Lewis acids. …”
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  2. 3642
    “…The isolation and structural characterization of the cyanido‐substituted metalated ylides [Ph(3)P−C−CN]M (1‐M; M=Li, Na, K) are reported with lithium, sodium, and potassium as metal cations. …”
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  3. 3643
    “…On the basis of DFT calculations, this ligand-promoted hydrolysis is caused by strong hydrogen bonds forming between Gluc(–) and Mg(H(2)O)(6)(2+). Conversely, metal-ion-induced ligand deprotonation takes place in the case of calcium(II) complexes, giving rise to salient variations on the NMR spectra in a strongly alkaline medium.…”
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  4. 3644
    “…BACKGROUND: In patients with distal malignant biliary obstruction (MBO), endoscopic biliary drainage using the conventional self-expandable metal stent (SEMS) is the gold standard method for palliative treatment. …”
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  5. 3645
    “…In article number https://doi.org/10.1002/advs.201900250, Il‐Doo Kim and co‐workers develop ultra‐small and well‐dispersed metal nanoparticles (NPs) embedded in the cavities of conductive metal–organic frameworks (C‐MOFs). …”
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  6. 3646
    “…(1) Background: The objective of the present study was to review the clinical and radiological results of a small-head, MoM bearing in primary THA and to determine blood metal ion levels at long-term follow-up. (2) Methods: We retrospectively evaluated the clinical and radiological results of 284 small-diameter, MoM 28-mm Metasul THA at a mean follow-up of 14.5 years, and measured blood metal ion concentrations in 174 of these patients. (3) Results: After 14 years, survival free for revision due to any reason was 94%. …”
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  7. 3647
    “…This work demonstrates how the combination of resonant and non-resonant X-ray emission spectroscopies supplemented with theoretical modelling allows for quantitative analysis of electronic states in 5d transition metal and metal-oxide materials. Application of X-rays provides element selectivity that, in combination with the penetrating properties of hard X-rays, allows determination of the composition of electronic states under working conditions, i.e. non-vacuum environment. …”
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  8. 3648
    “…Plants growing on heavy metal (HM)-polluted soils show toxicity symptoms, such as chlorosis and growth reduction, and undergo oxidative stress due to the formation of reactive oxygen species (ROS). …”
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  9. 3649
    “…OBJECTIVE: This study was performed to assess the outcomes of Asian patients who underwent conversion from metal-on-metal total hip arthroplasty (MoM-THA) to cemented THA (CTHA). …”
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  10. 3650
  11. 3651
    “…Asymmetric metal-semiconductor-metal (MSM) aluminum gallium nitride (AlGaN) UV sensors with 24% Al were fabricated using a selective annealing technique that dramatically reduced the dark current density and improved the ohmic behavior and performance compared to a non-annealed sensor. …”
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  12. 3652
  13. 3653
  14. 3654
  15. 3655
  16. 3656
    por Lin, I-Hao, Tsai, Chun-Hao
    Publicado 2021
    “…BACKGROUND: Metal-on-metal (MoM) total hip arthroplasty (THA) has been associated with adverse reactions to metal debris, presenting clinically as pseudotumors. …”
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  17. 3657
    “…The 14mer peptide corresponding to the N-terminal region of human copper transporter Ctr1 was used to investigate the intricate mechanism of metal binding to this plasma membrane permease responsible for copper import in eukaryotic cells. …”
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  18. 3658
    “…BACKGROUND: Many worldwide regulatory authorities recommend regular surveillance of metal-on-metal hip arthroplasty patients given high failure rates. …”
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  19. 3659
    “…OBJECTIVES: To evaluate the reduction of metal artifacts in patients with titanium peduncular screws in the spine using (1) conventional images (CI), (2) virtual monoenergetic reconstructions (VMRs), and (3) VMR + Metal Artifact Reduction Software (VMR + MARS), with dual-energy computed tomography (DECT). …”
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  20. 3660
    por Li, Zhao, Ke, Wei, Liu, Mingyao, Zhou, Yang
    Publicado 2022
    “…This paper describes a method for reducing thermal residual strains/stresses in metal-CFRP-metal hybrid tubes (MCMHT). The proposed axial preload tool provides two ways to reduce the thermal residual strains/stresses during the co-cure bonding process: pre-compressing of the metal layers and pre-stretching of the unidirectional carbon fiber reinforced polymer (CFRP) layers. …”
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