[PDF] Top 20 J. Braz. Chem. Soc. vol.22 número4

J. Braz. Chem. Soc. vol.22 número4

... A elevação da produção decorrente dessas quatro frentes exigirá uma forte agenda de inovação. Os investimentos projetados em pesquisa, desenvolvimento e inovação dever[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Robb, M. A.; Cheeseman, J. R.; Montgomery, Jr., J. A.; Vreven, T.; Kudin, K. N.; Burant, J. C.; Millam, J. M.; Iyengar, S. S.; Tomasi, J.; Barone, V.; Mennucci, B.; Cossi, M.; Scalmani, ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... The authors are grateful to Vicerrectoría de Investigación (UCR) (Project 809-A4-006) for partial inancial support, to V. Mora (Reserva Biológica Alberto M. Brenes) for the assistance with the plant collection, J. ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Analytical signal for all the selected pesticides were optimized by changing the following parameters, initial scan potential, amplitude, pulse width, and keeping other parameters such as scan increment, sampling width, ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... The production rise resulting from these four segments will demand a strong agenda for innovation. The projected investments in research, development and innovation are expected [r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... This adsorptive behavior is consistent with the pre pre-concentration of ketoconazole at a mercury electrode on a open circuit, 7 but in our experimental conditions, no adsorp[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... In this manuscript we describe the development of a portable microcontrolled nephelometer (PMN) constructed using LEDs as radiation source, photodiodes as detectors, and a microcontro[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Studies on the pH, available phosphorus (P), organic matter (OM) and the exchangeable cations Ca 2 + and Mg 2 + were performed on soil samples from horizons A1 and A2 over an area wi[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Farkas, O.; Malick, D. K.; Rabuck, A. D.; Raghavachari, K.; Foresman, J. B.; Ortiz, J. V.; Cui, Q.; Baboul, A. G.; Clifford, S.; Cioslowski, J.; Stefanov, B. B.; Liu, G.; Liashenko, A.; Piskorz, P.; ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Yerba mate leaves (Ilex paraguariensis) were used from commercially available herbal products. Chromium chloride was acquired from Riedel-de Haën (Seelze, Germany). Lead chloride was purchased from Merck (Darmstadt, ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... New adducts of lapachol with neat primary aliphatic amines were obtained in a solvent-free reaction in good to reasonable yields (52 to 88%), at room temperature.. The new compounds co[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... A preliminary evaluation of the limit of detection (LOD) was performed by automatic successive dilutions of taurine using an Aliance HPLC system (Waters), determining the lower detectable amount that was, approximately, ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... ethanol was added to a suspension of freshly cut carrot root (30 g) in 80 mL of distilled water, and the reaction mixture was incubated on an orbital shaker (180 rpm) at 30 °C for 6 d[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Figure 1 shows the instrumental setup for EOF photometric measurements. A photograph of the instrumental setup can be found in the Supplementary Information. The system was built with a trinocular microscope (model ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Only 40% of the total organic carbon (TOC) removal was observed on system activated by UV irradiation and 63% on system irradiated by visible light. This behavior indicates that photo[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... 35. Gaussian 03, Revision B.02; Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Scuseria, G. E.; Robb, M. A.; Cheeseman, J. R.; Montgomery, J. A.; Vreen Jr., T.; Kudin, K. N.; Burat, J. C.; ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... According to the authors (Figure 5a), poor separation and asymmetric peaks were obtained on the two-dimensional plane using the normal GC×GC column combination (non-polar as the irst [r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... J are reported in Hertz (Hz). IR spectra were recorded on a FTIR-Varian 640-IR spectrometer. Melting points were measured on an Olympus BX41 microscope equipped with a Mettler-Toledo FP82HT hot stage ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Proceeding from the fact that acetonitrile and propionitrile are good solvents for electrochemical acid- base investigations, in this work, propionitrile was applied for the coul[r] ... See full document

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J. Braz. Chem. Soc. vol.22 número4

... Table 2 presents ECFx values obtained from a FAME standard saturated: 14:0, 16:0, 18:0, 20:0, 22:0, 24:0, and polyunsaturated (double ≥ 2) 18:3n-3, 20:5n-3, 22:6n-3, 18:2n-6, and 20:4n-6, and the TCFx one ... See full document

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