[PDF] Top 20 J. Braz. Chem. Soc. vol.14 número5
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J. Braz. Chem. Soc. vol.14 número5
... Com isso, as duas publicações da Sociedade Brasileira de Química, SBQ, mantêm a liderança na área como os periódicos de maior impacto científico na América Latina, sendo o JBCS a revista[r] ... See full document
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J. Braz. Chem. Soc. vol.14 número5
... Derivatization of the carboxylic group of the quinolone bases was extended next. The hydrazide key intermediate was used here for the synthesis of the 3-carbohydrazide- sugar compounds as promising antibacterial agents. ... See full document
7
J. Braz. Chem. Soc. vol.14 número5
... 60. Liang, R.; Yan, L.; Loebach, J.; Ge, M.; Uozumi, Y.; Sekanina, K.; Horan, N.; Gildeersleeve, J.; Thompson, C.; Smith, A.; Biswass, K.; Still, W. C.; Kahne, D.; Science 1996, 274, 1520. 61. Sofia, M. ... See full document
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J. Braz. Chem. Soc. vol.14 número5
... Although the reactions were incomplete after several hours, it was observed that using NCSac it was obtained products arising from the reaction with both aromatic nucleus and methyl grou[r] ... See full document
4
J. Braz. Chem. Soc. vol.14 número5
... EIMS were obtained with a 70 eV INCOS 50 Finnigan-Mat- quadrupole mass spectrometer; silica gel 60 (Merck) and Sephadex LH-20 (Pharmacia) were used for column chromatography (63-200 µ m[r] ... See full document
4
J. Braz. Chem. Soc. vol.14 número5
... by proton-proton homocorrelated and carbon-proton heterocorrelated spectra. HREIMS (70 eV, direct probe) experiment was performed using a VG Auto Spec-Fisions Instrument using electron ionisation at 70 eV (linked scan ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... Water samples were collected from four different depths up to 50 m at three stations of Cabo Frio and nutrient concentration, pH, dissolved oxygen, alkalinity, seston, chlorophyll a, pri[r] ... See full document
7
J. Braz. Chem. Soc. vol.14 número5
... Neolignans are molecules that present several degrees of rotation with the possibility of attaining many geometric conformations (Figure 1 shows the general structure and numbering used in the neolignan compounds ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... of enthalpy and entropy of fusion reported in the literature, and they have been obtained by differential thermal analysis (DTA), a semiquantitative method, while the values presented here were obtained by DSC, a ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... The homogenous sulfonation of polystyrene was developed in a pilot plant scale producing polymers with different sulfonation degrees (18 to 22 mole % of sulfonated styrene units).. The r[r] ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... 4. Baxter, P.N.W.; Constable, E.C.; Fujita, M. In Comprehensive Supramolecular Chemistry; Atwood, J.L.; Davies, J.E.D.; Macnicol, D.D.; Vögtle, F., eds., Pergamon: Oxford, 1996, vol. 9, pp. 165-211; pp. 213-252; ... See full document
13
J. Braz. Chem. Soc. vol.14 número5
... 3-10 Time resolved anisotropy decay of a fluorescent probe attached to a polymer chain reflects the rotational relaxation of the probe, and the local dynamics of the polymer segments in[r] ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... electroactive species in solution, such as the acid-base equilibrium (equation 14) is displaced by the fast oxidation of the electroactive species. Hence, for relatively long time windows the depletion of the ... See full document
9
J. Braz. Chem. Soc. vol.14 número5
... 1.36 and 1.40, which correspond, respectively, to Me-15, Me-9’, Me-14 and Me-12, and a doublet for a methyl group at δ 1.65 (Me-13), which results from coupling with the proton at δ 1.98 (H-11β). Vinylic hydrogen ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... This hypothesis is highlighted when a surfactant agent (such as Triton X- 100) was added to the extraction medium, which strongly decreased the amount of Cu(II)-DDTC retained by foam, th[r] ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... HMQC (75 MHz, CDCl 3 ): 45.0 (d, C-1), 36.5 (t, C-2), 74.5 (d, C-3), 147.7 (s, C-4), 50.4 (d, C-5), 77.6 (d, C-6), 50.1 (d, C-7), 65.7 (d, C-8), 41.8 (t, C-9), 142.8 (s, C-10), 136.0 (s, C-11), 170.8 (s, C-12), 121.6 (t, ... See full document
4
J. Braz. Chem. Soc. vol.14 número5
... The essential oils of Ocimum americanum , with the exception of “clove” basil, were rich in phenylpropanoids and a single biosynthetic origin is indicated for them as all of them showed[r] ... See full document
6
J. Braz. Chem. Soc. vol.14 número5
... An ORTEP view of the complex along with the atom numbering scheme is shown in Figure 1. Crystallographic data are presented in Table 1 and selected bond distances and angles are listed in Table 2. A comparison with mean ... See full document
9
J. Braz. Chem. Soc. vol.14 número5
... 14. Krug, R.C.; Yen, T.F.; J. Org. Chem. 1956, 21, 1082. 15. Yadav, J.S.; Ravishankar, R.; Tetrahedron Lett. 1991, 32, 2629. 16. Sheares, V.V.; Jing, Y.; Macromolecules 2000, 33, 6255; Mannebach G.; ... See full document
5
J. Braz. Chem. Soc. vol.14 número5
... Combining HPLC with an electrochemical detector allowed us to detect micromolecules that showed antioxidant activities in Chimarrhis turbinata (DC) leaf extracts.. Comparison with puri[r] ... See full document
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