Mostrando 221 - 240 Resultados de 13,004 Para Buscar '"The Crown"', tiempo de consulta: 0.37s Limitar resultados
  1. 221
  2. 222
    por Mathias, Lon, Carraher, Charles
    Publicado 1984
    “…These generally include either crown ethers or onium salts of various kinds. While the term phase transfer catalysis is relatively new, the concept of using a phasetrans­ fer agent (PTA) is much older~ Both Schnell and Morgan employed such catalysts in synthesis of polymeric species in the early 1950's. …”
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  3. 223
  4. 224
  5. 225
  6. 226
    “…Additionally, PHPT can be complicated by crowned dens syndrome (CDS). We present a case of a 72-year-old female. …”
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  7. 227
    “…BACKGROUND: The crown-of-thorns starfish (COTS; Acanthaster species) is a slow-moving corallivore protected by an extensive array of long, sharp toxic spines. …”
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  8. 228
  9. 229
    “…These hybrid systems constitute a broad group of compounds, including crowned porphyrins, crownphyrins, and calixpyrrole-crown ether systems forming Pacman complexes with transition metals. …”
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  10. 230
    “…OBJECTIVES: The aim of the investigation was to examine the forms of the crowns in the maxillary anterior tooth segment and corresponding gingival characteristics among healthy Taiwanese subjects. …”
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  11. 231
    “…The equatorial positions are occupied by the six O atoms of an 18-crown-6 ether ring. In the axial positions, there is one O atom of a trifluoro­methane­sulfonate anion and an ether O atom of a symmetry-equivalent crown ether ring. …”
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  12. 232
    “…One mechanism is applied in the current so-called crown indicator of our institute. The other mechanism is applied in the new crown indicator that our institute is currently exploring. …”
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  13. 233
    por Singhal, Namit, Agarwal, Sunil
    Publicado 2010
    “…These findings make the ventricular system appear in shape of a crown, which we refer to as “CROWN SIGN”, first described in neurosurgical literature..…”
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  14. 234
  15. 235
    por Zhao, Min-Min
    Publicado 2012
    “…In the title compound, [BaCl(C(12)H(24)O(6))(H(2)O)(3)]Cl, the Ba(II) atom, the coordinating and free Cl(−) anions, one coordinating water mol­ecule and two O atoms of an 18-crown-6 mol­ecule lie on a mirror plane. The environment of the ten-coordinate Ba(2+) ion is defined by one Cl atom, three water mol­ecules and six O atoms from the macrocyclic ether. …”
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  16. 236
    por Wei, Bin
    Publicado 2012
    “…In the crystal of the title compound, 2CH(6)N(3) (+)·2Cl(−)·C(12)H(24)O(6), the 18-crown-6 mol­ecule is located across an inversion center. …”
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  17. 237
    por Wang, Yu-feng
    Publicado 2012
    “…In the title compound, 2CH(6)N(3) (+)·2Br(−)·C(12)H(24)O(6), the 18-crown-6 mol­ecule lies about an inversion center, whereas the guanidinium cation and bromide anion are in general positions. …”
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  18. 238
    “…OBJECTIVE: To investigate the biotransformation of furannoligularenone (1) by transgenic crown galls of Panax quinquefolium. MATERIALS AND METHODS: Compound 1 was administered into the crown gall cultures and co-cultured for 6 days. …”
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  19. 239
    “…Restoration of a crown-root subgingival fractured tooth, especially at anterior aesthetic zones is still a great challenge for restorative dentists. …”
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  20. 240
    “…BACKGROUND: Crown gall (CG) (Agrobacterium tumefaciens) and the root lesion nematodes (RLNs) (Pratylenchus vulnus) are major challenges faced by the California walnut industry, reducing productivity and increasing the cost of establishing and maintaining orchards. …”
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