Mostrando 7,221 - 7,240 Resultados de 2,754,589 Para Buscar '"3 %"', tiempo de consulta: 3.90s Limitar resultados
  1. 7221
  2. 7222
    “…OBJECTIVE: This study compared the dynamic susceptibility contrast (DSC) magnetic resonance imaging parameters and apparent diffusion coefficient (ADC) between pilocytic astrocytoma (PA) and diffuse midline glioma, H3K27-altered (DMG) variants. METHODS: The normalized relative cerebral blood volume (nrCBV), normalized relative flow (nrCBF), percentile signal recovery (PSR), and normalized mean ADC (nADCmean) of 23 patients with midline PAs (median age, 13 years [range, 1–71 years]; 13 female patients) and 40 patients with DMG (8.5 years [1–35 years]; 19 female patients), including 35 patients with H3.3- and five patients with H3.1-mutant tumors, treated between January 2016 and May 2022 were statistically compared. …”
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  3. 7223
  4. 7224
    “…A facile and efficient method has been developed for the synthesis of C3-difluoromethyl carbinol-containing imidazo[1,2-a]pyridines at room temperature via the HFIP-promoted Friedel–Crafts reaction of difluoroacetaldehyde ethyl hemiacetal and imidazo[1,2-a]pyridines. …”
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  5. 7225
    por Northrop, John H., Kunitz, M.
    Publicado 1928
    “…No calcium is combined on the acid side of pH 3. The value rises rapidly from pH 3 to 4.7 and then remains constant. 5. …”
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  6. 7226
  7. 7227
    “…The title compound, C(26)H(38)O(3), was prepared by an intra­molecular Claisen-like cyclization of ethyl 2-acet­oxy-4,4-dimethyl-1-(3-methyl­but-2-en­yl)cyclo­hex-2-enecarboxyl­ate followed by dialkyl­ation. …”
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  8. 7228
    “…The asymmetric unit of the title complex, [Ni(2)(C(16)H(6)O(8))(C(10)H(8)N(2))(2)(H(2)O)(6)]·6H(2)O, contains one Ni(II) atom, one 2,2′-bipyridine ligand, three coordinated water mol­ecules, one-half of a fully deprotonated biphenyl-3,3′,4,4′-tetra­carboxyl­ate anion and three lattice water mol­ecules. …”
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  9. 7229
  10. 7230
    “…In the title compound, C(18)H(19)N(3)O(5), the 3,6-dihydro-2H-pyran ring adopts a half-chair, distorted towards a half-boat, conformation with Q (T) = 0.5276(14) Å. …”
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  11. 7231
    “…In the title compound, [Cd(C(8)H(4)O(5))(C(12)H(12)N(2))], the Cd(II) cation is coordinated by three 5-hy­droxy­isophthalate anions and one 5,5′-bimethyl-2,2′-bipyridine ligand in a distorted CdO(4)N(2) octa­hedral geometry. …”
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  12. 7232
    “…In the title compound, C(21)H(21)N(3)O(3), the relative stereochemistry of the four stereogenic C atoms has been determined. …”
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  13. 7233
  14. 7234
  15. 7235
    “…In the 3,3′-diethyl-1,1′-(propane-1,3-di­yl)di(1H-imidazol-3-ium) cation, the dihedral angle between the imidazole rings is 49.3 (1)°. …”
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  16. 7236
    “…In the crystal, mol­ecules are consolidated into a three-dimensional architecture by C—H⋯O inter­actions, involving all three carbonyl-O atoms, and π–π inter­actions occurring between the pyrimidinyl and isoindole-benzene rings [inter-centroid distance = 3.5330 (13) Å].…”
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  17. 7237
    “…The title compound, C(16)H(19)N(3)O(4)S, is almost planar, with a dihedral angle of 2.88 (9)° between the mean planes of the benzene and thia­zole rings. …”
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  18. 7238
    “…RESULTS: Two compounds, emodin and the novel flavan-3-ol, (−)-epiafzelechin-3-O-p-coumarate (rhodoeosein), were identified to be responsible for estrogenic activity of F. convolvulus seed extract. …”
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  19. 7239
    “…They stack along the a axis with π–π inter­actions involving the 4H-chromene units [centroid–centroid distances of 3.6389 (13) and 3.6555 (13) Å]. The terminal CH(2)=CH- atoms of the allyl acetate group are disordered over two sets of sites with a refined occupancy ratio of 0.717 (6):0.283 (6).…”
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  20. 7240
    “…The crystal packing features C—H⋯O hydrogen bonds, forming a three-dimensional structure. The meth­oxy­carbonyl atoms are disordered over two positions, with a refined occupancy ratio of 0.508 (18):0.492 (18).…”
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