[PDF] Top 20 J. Braz. Chem. Soc. vol.15 número4
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J. Braz. Chem. Soc. vol.15 número4
... Reunião Anual da Sociedade Brasileira de Química (SBQ), realizados em Salvador entre 30 de maio e 2 de junho deste ano, reuniram cerca de três mil participantes, dos quais mais de 10% do[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... The multivariate approach was based on principal component analysis (PCA), first to classify the lubricating oil type (mineral, synthetic and semi-synthetic) and then to develop two cont[r] ... See full document
7
J. Braz. Chem. Soc. vol.15 número4
... ASTM G5 norm. Electrochemical experiments were performed after an electro-reduction process at a fixed potential (E O,c = -1.12 V/SCE) in order to reduce as much as possible the spontaneously formed oxides onto the ... See full document
7
J. Braz. Chem. Soc. vol.15 número4
... Hence, the different morphologies of particles: “bead” cenospheres with smaller sizes found predominantly in the particulate from standard oil combustion and larger porous cenospheres ma[r] ... See full document
8
J. Braz. Chem. Soc. vol.15 número4
... 2. Taber, D. F.; Herr, R. J.; Pack, S. K.; Geremia, J. M.; J. Org. Chem. 1996, 61, 2908; Yu, W.; Su, M.; Jin, Z.; Tetrahedron Lett. 1999, 40, 6725; Concellón, J. M.; Huerta, M.; ... See full document
3
J. Braz. Chem. Soc. vol.15 número4
... The effectiveness of polyether based polyurethane foam for the extraction of indium from an iodide medium was proven by the high distribution ratio and rapid kinetic sorption achieved fo[r] ... See full document
7
J. Braz. Chem. Soc. vol.15 número4
... the fact that in the reactions of 1 with electron rich olefins, where the formation of products derived from a 1,4- biradical are expected, a long-lived new transient can be observed, which could not be assigned to an ... See full document
5
J. Braz. Chem. Soc. vol.15 número4
... Tetrahydrophthalic (THA) and maleic (MA) anhydrides were grafted onto linear low density polyethylene with comonomer 1-butene and 1-octene (LLDPE) in solution in the presence of benzoyl [r] ... See full document
9
J. Braz. Chem. Soc. vol.15 número4
... (1:1, 0.5 L each). The chloroform layer was vacuum-dried by evaporation and an aliquot of 30.0 g was applied to a column filled with 300 g of a 1:1 mixture of silica gel (63 - 210 mm) and Florisil (both Merck, Darmstadt, ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... The presence of the additional sugar moiety bonded to carbon CH-4 of the glucopyranosyl G2 was deduced from the 2D NMR experiments [heteronuclear HMQC and HMBC (Table 2) and homonuclear [r] ... See full document
8
J. Braz. Chem. Soc. vol.15 número4
... Applying a similar strategy, but using Boc- protected L-isoleucine or L-alanine and arylamidoximes, we synthesized seven 1,2,4-oxadiazoles, six containing two asymmetric centers 4a-f a[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... Three mixtures of steroids ( 1a + 1b , 2a + 2b and 3a + 3b ) and two flavonoid glycosides ( 4 and 5 ) were isolated from the ethanol extract of branches of Porcelia macrocarpa (Wa[r] ... See full document
6
J. Braz. Chem. Soc. vol.15 número4 en a01v15n4
... The first was a meeting carried out by initiative of the American Chemical Society (ACS), attended by the presidents of Latin American scientific societies, the IUPAC president, represen[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... The catalyst prepared on alumina-coated Cordierite with a 2.5% silver load presented 2% dispersion, a metallic surface area of 0.3 m 2 g -1 and large particles.. Assuming that Cordier[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... Although no vanadium leaching was observed during the catalytic reactions, recycling experiments with the hybrid catalyst and trans -2-hexen-1-ol showed that some loss of vanadium took [r] ... See full document
5
J. Braz. Chem. Soc. vol.15 número4
... This work was funded by grants from Biota-FAPESP and CNPq. A. C. de Oliveira thanks CAPES for providing a scholarship. V. da S. Bolzani and M. C. M. Young also are grateful to CNPq for the fellowships of scientific ... See full document
4
J. Braz. Chem. Soc. vol.15 número4
... microcomputer controls the instrumental parameters and the acquisition of the signals from the CCD operating at 600 kHz. The detector was placed at 10 cm from the end of the capillary. The samples were injected by ... See full document
4
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
4
J. Braz. Chem. Soc. vol.15 número4
... evaluated the resistance to uniform and pitting corrosion of AISI-304 stainless-steel samples colored using the alternating potential pulse method with different amplitudes (0.41 V, 0.42 V, 0.43 V and 0.44 V vs. Hg/Hg 2 ... See full document
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J. Braz. Chem. Soc. vol.15 número4
... The accuracy of the procedure was confirmed by the good concordance between found and certified values in the analysis of a bone meal certified reference material, NIST SRM 1846.. Keywor[r] ... See full document
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