[PDF] Top 20 J. Braz. Chem. Soc. vol.18 número5
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J. Braz. Chem. Soc. vol.18 número5
... In 2006 the periodical published another article once again mentioning the Brazilian petrochemical sector, reporting Latin America’s great plans, highlighting the Brazilian situation wit[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... standard. Chemical shifts (δ) were expressed in ppm and coupling constants (J) were given in Hz. Mass spectra were taken with a JEOL JMS-DX302 mass spectrometer. Elemental analyses were performed on an EA-1110 (CE ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... Table 2 shows mean thickness (d) of layers formed by immobilizing TXG and HXG onto Si/SiO 2 wafers, as determined by means of ellipsometry and the corres- ponding mean surface roughness[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... urucurana stem bark exhibited the IC 50 of 3.21 mg mL -1 in the DPPH free radical scavenging activity spectrophotometric assayH. This IC 50 value reveals that the tested essential oil[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... As the increase of the analytical signal was very small by using poly (vinylalcohol) solution, to avoid adherence of precipitate in the inner walls of the tubes, coil and/or cell, an int[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... Optimization of the chromatographic and SPME parameters yielded a method for the determination of urinary o -cresol showing linearity, precision and quantification limit which permitted[r] ... See full document
6
J. Braz. Chem. Soc. vol.18 número5
... The developed portable condensing apparatus gives the capability for bed side testing while the use of Flow Injection in combination with chemiluminescence detection provides a rapid, si[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... In bioassay 3, the evaluation of male and female insects to the extract of males added to fresh pieces of the host plant showed significant differences in attractiveness to both sexes wh[r] ... See full document
6
J. Braz. Chem. Soc. vol.18 número5
... In the second, third and fourth sample obtained by solubilization of the extract from E. vannamei in H 2 O, MeOH/H 2 O and acetonitrile/H 2 O, respectively, the nucleosides were not extracted in high amount compared with ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... Neste trabalho é proposta uma metodologia analítica para extrair 1-nitronaftaleno, 2-nitrofluoreno, 9-nitroantraceno, 3-nitrofluoranteno e 1-nitropireno como compostos modelos para nitropoliaromáticos (nitro-HPA) em ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... 12. Villegas, R.A.S.; Santo Jr., J.L.E.; de Mattos, M.C.S.; de Aguiar, M.R.M.P.; Guarino, A.W.S.; J. Braz. Chem. Soc. 2005, 16, 565. 13. Kanagasabapathy, S.; Sudalai, A.; Benicewicz, B.C.; ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... The results of diosgenin quantification by HPLC are given in Figure 2. The percentages of diosgenin obtained from the seventy four accessions of D. polygonoides on this work are in the range from 0.02 to 2.64%, which is ... See full document
4
J. Braz. Chem. Soc. vol.18 número5
... The CH 2 Cl 2 extract (44.4 g) was chromatographed by QCC and eluted with hexane-EtOAc mixtures to give seven fractions (F1-F7). Fraction F2 (1.92 g) was purified by RP- 18 CC with acetone: H 2 O (3:1) and ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... AB rings was elucidated from the coupling constants (J 1ax,2 12.3 Hz, and J 3,2 = J 3,4ax = J 3,4eq = 2.9 Hz), and the NOESY correlations of H-2 to H-4ax, H-2 to H-9, H-5 to H-19, and H-4ax to ... See full document
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J. Braz. Chem. Soc. vol.18 número5 pt a01v18n5
... Em 2006, novamente a revista publica artigo mencionando mais uma vez o setor petroquímico brasileiro, relatando os grandes planos da petroquímica na América Latina, destacando a situação[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... Also, in this report we showed that the complexes formed by Tl(I)-L- phenylalanylglycine and glycyl-L-phenylalanine systems are much more stable than those formed by Cd(II)-L- phenylalan[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... 4. Salvatore, M. J.; Hensens, O. D.; Zink, D. L.; Liesch, J.; Dufresne, C.; Ondeyka, J. G.; Jurgens, T. M.; Borris, R. P.; Raghoobar, S.; Mccauley, E.; Kong, L.; Gartner, S. E.; Koch, G. E.; Pelaez, ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... In contrast with the observed for the Se and Te analogs, the hydrosulfuryllation reaction of ketones 1c-d was not effective, with formation of 3k and 3l in very low yields (ca. 10% yield after stirring for 2.5 h). The ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... Considering that the highest surface area value of the silica xerogels was obtained for sample E, where acetone was used as solvent and acetic and hydrochloric acids as catalysts, we dec[r] ... See full document
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J. Braz. Chem. Soc. vol.18 número5
... class j for the first species and n compounds of the same chemical class, the number of occurrences O i,j in the tribe i is the sum corresponding to m + ... See full document
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