Mostrando 821 - 840 Resultados de 109,865 Para Buscar '"Ringe"', tiempo de consulta: 0.29s Limitar resultados
  1. 821
  2. 822
  3. 823
  4. 824
    “…A scope of Brønsted acids, including trifluoromethanesulfonic acid (1), HCl.Et(2)O (2), diphenyl phosphate (3), γ-resorcylic acid (4) and methanesulfonic acid (5), are evaluated to promote ring-opening polymerization of ε-caprolactone with unprotected 6-mercapto-1-hexanol as the multifunctional initiator. …”
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  5. 825
  6. 826
  7. 827
  8. 828
  9. 829
  10. 830
    “…Introducing substrate binding through depletion catalyzes dimer chains to form nonequilibrium rings that otherwise do not form.…”
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  11. 831
    “…B-ring unsubstituted flavones (of which the most widely known are chrysin, baicalein, wogonin, and oroxylin A) are 2-phenylchromen-4-one molecules of which the B-ring is devoid of any hydroxy, methoxy, or other substituent. …”
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  12. 832
  13. 833
    “…A 2.54-cm diameter drop is constrained by a stationary sharp-edged ring at some latitude and sheared by the rotation of another ring in the other hemisphere. …”
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  14. 834
    por Monib, Sherif, Amr, Bassem
    Publicado 2019
    “…LEARNING POINTS: Penile strangulation by metallic rings is not routinely encountered in daily emergency practice and can be a challenge for the treating surgeon. …”
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  15. 835
    “…The underlying ring has always to be a countable dense subring of the real numbers and additions and comparisons and multiplications with constants need to be automatic. …”
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  16. 836
    “…Signet ring cell adenocarcinomas (SRCCs) are a rare histological subtype of adenocarcinomas with a poor prognosis, typically due to advanced disease at diagnosis. …”
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  17. 837
    “…Here, we describe an unprecedented “ester dance” reaction: a predictable translocation of an ester group from one carbon atom to another on an aromatic ring. Specifically, a phenyl carboxylate substituent can be shifted from one carbon to an adjacent carbon on a (hetero) aromatic ring under palladium catalysis to often give a thermodynamically favored, regioisomeric product with modest to good conversions. …”
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  18. 838
    “…Dendrochronology, the study of annual rings formed by trees and woody plants, has important applications in research of climate and environmental phenomena of the past. …”
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  19. 839
    “…The proposed multi-joint ring motif can provide a novel method for creating functional molecular devices.…”
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  20. 840
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