Este trabalho mostra as reações entre 2-trifluoracetil-1-metoxi-1-cicloalquenos (1a-1e) ou 2-trifluoracetilcicloalcanonas e bromo molecular, para produção de ω-bromo-2trifluoracetilcicloalcanonas (3a-3e, 4a). Ficou demonstrado que o grupo 2-trifluoracetil determina o sítio de bromação no C-omega, carbono vizinho à carbonila endocíclica. Os produtos 2-trifluoracetilcicloalcanonas e ω-bromo-α-tri...

Sinularia leptoclados (Ehrenberg, 1834) is re-described. Sinularia leptoclados var. gonatodes Kolonko, 1926 is synonymized with Sinularia maxima Verseveldt, 1977. Two new species of Sinularia with digitiform lobules, leptoclados-type surface clubs and unbranched interior spindles, are described. An updated maximum likelihood tree of Sinularia species with leptoclados-type clubs (clade 5C) based...

Novel tetrasubstituted pyrazole derivatives bearing a nitro substituent on their A-phenol ring were synthesized and their binding affinity towards the estrogen receptor (ER) subtypes ERalpha and ERbeta was determined. Among compounds tested, the 2-nitrophenol derivative 5c was found to bind satisfactorily to both estrogen receptor subtypes (RBAalpha=5.17 and RBAbeta=3.27). In general, the intro...

The solution structure of 20 mer RNA contained of the loop 9.1a region of Tetrahymena group I intron was studied by NMR. This RNA oligomer has hairpin and duplex structures at high concentration (1 mM) of the sample even at low NaCl concentration (5 mM). In the hairpin structure, GC base pairs by the loop-loop interaction are formed. As study of NOESY measurements, and by the compared with the ...

Fig 7. Scanning Electron Micrographs ofMegaloolithus jabulpurensis (VPL/CCE—5C) eggshells. A, Fan shaped spherolith (SP) and pore canal (PC). B, Spongy layer of the spherolith magnified showing arcuate accretion lines and various fracture patterns. C, Spongy layer further magnified to show the typical “Herring-Bone” Pattern. D, Inner eggshell surface showing mamillae with resorption crater (RC)...

where d, k, a, b, c are integers, B(n) = n!−5 C(n) or B(n) = (−1)nn!−5C(n), and C(n) is the product of 5 rising factorials of fractions smaller than unity satisfying the following condition: For every denominator in the fraction of a rising factorial, we must have rising factorials with all possible nonreducible fractions corresponding to that denominator. Taking this into account, we have the ...

Coordination of copper (I) and (II) salts to melamine (Mel) produces [CuX(Mel)] [X = Cl (5a), Br (5b), I (5c), NO3 (5d)], [CuX2(Mel)2] Æ S [X = Cl, S = H2O (6a); X = Cl, S = 2 MeOH (6b); X = Br, S = 1/2H2O (6c); X = OAc, S = none (6d)], and [Cu(OAc)2(Mel)] (7). The chemical identity of the complexes has been confirmed by elemental analysis, X-ray powder diffraction, thermogravimetry, and infrar...

For a class of primes p = 1 (mod 20) for which 2 is a quintic nonresidue, unambiguous evaluations of parameters of bidecic Jacobi and Jacobsthal sums (modp) are presented, in terms of the partition p = a + 5b+5c+5d, ab = d — c—cd. Similar results for sums of other orders have been obtained by E. Lehmer and by K. S. Williams. Subject classification (Amer. Math. Soc. (MOS) 1970): 10G05.

This paper reports the synthesis of methanones and esters bearing different substitution patterns as spacer groups between aromatic rings. This series of compounds can be considered phenstatin analogs. Two of the newly synthesized compounds, 5a and 5c, strongly inhibited tubulin polymerization and the binding of [(3)H] colchicine to tubulin, suggesting that, akin to phenstatin and combretastati...

Following the publication of above article, an interested reader drew to authors' attention that, for cell migration assay experiments shown in Fig. 5 on p. 731, ‘TNF‑α’ data panels 5A and C appeared be matching, where performed under different conditions were intended have been displayed. After having re‑examined their original data, authors realized that files mislabelled, although they...