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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
1
J. Braz. Chem. Soc. vol.15 número6
... The following activities were included in the program: Opening; The Formation of Chemistry: Challenges and Needs; Industrial Policies and Innovation; Research Organization and the Challe[r] ... See full document
1
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 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
... 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
... (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
5
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
5
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 número6
... Este workshop foi organizado em conjunto pela Sociedade Brasileira de Química (SBQ) e pelo Centro de Gestão e Estudos Estratégicos (CGEE), com o objetivo de analisar a configuração atual[r] ... See full document
1
J. Braz. Chem. Soc. vol.15 número6
... In order to determine which of these two heating rates is more appropriate when using fiber glass paper (experiments TG3 and TG4 of Table 2) to obtain ash contents similar to those enco[r] ... See full document
6
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
1
J. Braz. Chem. Soc. vol.15 número6
... Figure 3 shows the cyclic voltammograms obtained for 9.1 x 10 -5 mol L -1 dipyrone solution at a carbon paste electrode unmodified and modified with [VO(Salen)] complex in 0.10 mol L -[r] ... See full document
6
J. Braz. Chem. Soc. vol.15 número6
... 5. For some recent examples see: Nishikori, H.; Ito, K.; Ktsuki, T.; Tetrahedron: Asymmetry 1998, 9, 1165; Upadhya, T. T.; Gurunath, S.; Sudalai, A.; Tetrahedron: Asymmetry 1999, 10, 2899; Johnson, D. V.; Fischer, R.; ... See full document
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J. Braz. Chem. Soc. vol.15 número5
... 3 King 3 analisou artigos, revisões e as respectivas citações, publicados nos mais de 8.000 periódicos (publicados em 36 línguas) indexados na base Thompson ISI, no período de 1993 a 20[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número5
... Today, Brazil is responsible for 1.5% of the world’s scientific production and approximately 10% of Brazilian publications within the country in indexed periodicals is in periodicals of [r] ... See full document
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J. Braz. Chem. Soc. vol.15 número6
... In all cases no isomerization was observed, but by using 1 equivalent of InCl 3 two products of higher retention time were observed probably due to decomposition and/or dimerization of [r] ... See full document
5
J. Braz. Chem. Soc. vol.15 número6
... Consequently, the importance in obtaining P4VP/copper films onto copper surfaces for technological development is clear. Thereby, it is feasible to carry out the synthesis of this transition-metal polymer-complex by ... See full document
7
J. Braz. Chem. Soc. vol.15 número5
... Figure 5 shows the normalized faradaic voltammetric charge of phenol (q phN = (q ph – q*)/q*) as a function of phenol concentration and for different electrode compositions.. It shows [r] ... See full document
9
J. Braz. Chem. Soc. vol.15 número6
... A hydride generator MHS 15 (Perkin Elmer) was coupled to the AAnalyst 100 and the vapor generator was manually operated. A 3% m/v sodium borohydride solution stabilized with 1% m/v sodium hydroxide was used as ... See full document
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