[PDF] Top 20 J. Braz. Chem. Soc. vol.15 número3

J. Braz. Chem. Soc. vol.15 número3

... Depois dessas escolhas, o próximo passo foi dar início à organização do evento que deveria contar com a presença de toda a comunidade química e, para ser o mais abrangente possível, a SB[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... With the aim of comparing Hg-UME results, the effect of scan rate was also studied using a conventional HMDE and the cyclic voltammetric curves were obtained in the range of 10 mV s -1 [r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... CLAQ is an event of the Federação Latino Americana de Sociedades/Associações de Química (FLAQ – Latin American Federation of Chemical Societies/ Associations), which gathers together [r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... all points having a potential of +0.5 kT and the red surface connects all points having a potential of -0.5 kT, while the TS and DHFR substrates in the active sites are shown in yellow C[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... The object of the present work is to compare excitation energies of some symmetric molecules calculated by both the SA-HAM/3 and the original HAM/3 methods, and to discuss the effect of [r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... The authors thank to Dr. David E. Williams and Raymond J. Andersen (Departments of Chemistry and Earth and Ocean Sciences, University of British Columbia, Vancouver, Canada) as well as Dr. Brent Copp (Department ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... 2. Zhang, X.; Rao, M.N.; Jones, S. R.; Shao, B.; Feibush, P.; McGuigan, M.; Tzodikov, N.; Feibush, B.; Sharkansky, I.; Snyder, B.; Mallis, L.M.; Sarkahian, A.; Wilder, S.; Joshua, E.T.; Kinney, W. A.; J. Org. ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... The formation of nickel vanadates was investigated by the action of nickel chloride with different vanadate anions at specific pH levels 12.4, 10.5, 7.4 and 3.6 using different concentra[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... In the difference spectrum (Figure 3), which correspond the subtraction of spectra after 5 min and 24 h, it was observed that only some fluorophores, presented in the region at high and [r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... With a close look at the results is possible to note that the composition of the sample is one of the main factors that affect the resolution, signal intensity, and the reproducibility. [r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... In this work, a simple and fast capillary electrophoresis method for the simultaneous analysis of 4-carboxybenzaldehyde (4-CBA), p -toluic acid (pTOL) and benzoic acid (BZ) in industria[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... stirring was added NaBH 4 (1.6 g, 42 mmol) in small portions until the color of the solution turned from dark red to pale yellow. The mixture was then refluxed for the time indicated in Table 3. The mixture was cooled to ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... Is this structural feature maintained in the liquid phase? Several indications indicate that indeed 1,3- dialkylimidazolium possess analogous structural patterns in both the solid and liquid phase and to some extent even ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... In this work, we report the use of a promising cathode material for rechargeable lithium batteries: a polyaniline composite obtained by template synthesis through the electrochemical pol[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... In order to measure the cyclic voltammetry, samples (~ 0.01 g) were suspended in 2 mL of distilled water and sonificated for 15 min. 300 µL of this suspension was carefully transferred to the surface of conducting ... See full document

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J. Braz. Chem. Soc. vol.15 número3

... 11.9 and 5.0 Hz, 8a; 5.48, dd, J 11.9 and 5.0 Hz, 6a) indicated that the acetoxyl group would be attached equatorial to C-15 (α) or C-16 (β), thus the above compounds are excellent models. The presence of a ... See full document

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J. Braz. Chem. Soc. vol.15 número4

... 8. Barrientos-Astigarraga, R. E.; Castelani, P.; Sumida, C. Y.; Comasseto, J. V.; Tetrahedron Lett. 1999, 40, 7717; Barrientos- Astigarraga, R. E.; Castelani, P.; Sumida, C. Y.; Zukerman- Schpector, J.; ... See full document

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J. Braz. Chem. Soc. vol.15 número4

... The ethyl acetate phase was applied to a column of Sephadex LH-20 (30 g) eluted with MeOH-H 2 O with increasing polarity to give 17 fractions. Fraction 8 (123 mg) was applied again to a column of Sephadex LH-20 (5 g) ... See full document

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J. Braz. Chem. Soc. vol.15 número6

... According to this equation the time integrated, second order sensors electrical output signal, multiplied by the constant volume heat capacity is proportional to the constant volume heat[r] ... See full document

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J. Braz. Chem. Soc. vol.15 número4

... The crystalline phases of the glass-ceramic before and after acid leaching were characterized by X-ray powder diffraction (XRD), infrared (IR) and Raman spectroscopies. In spite of the very close interplanar distances, ... See full document

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