[PDF] Top 20 J. Braz. Chem. Soc. vol.14 número3
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J. Braz. Chem. Soc. vol.14 número3
... Actions related to this area are: to propose a budget allocation for investment in Science and Technology, suggesting an initial value of 1% of the GNP, seeking to reach 2% in ten years;[r] ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... Methyl esters of diterpenoids ent-pimara-9(11),15-dien-19-oic acid (1), ent-pimara-7,15-dien- 19-oic acid (2), and ent-pimara-8,15-dien-19-oic acid (3) were submitted to photooxygenation reactions with sensitized singlet ... See full document
5
J. Braz. Chem. Soc. vol.14 número3
... d, J 7,8 16.0, 7- H), 4.88 (1 H, t, J 4,3 = J 4,5 ...d, J gem 11.6, one of PhCH 2 ), 4.81 (1 H, d, J gem ...d, J 1,2 3.6, 1-H), 3.95 (1 H, t, J 3,4 = J 3,2 ...qd, ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... ethanol for a week in the dark. The resulting ethanolic extract afforded a syrupy dark material (EE, 66.1 g) which was washed with distilled water. The water-soluble extract (WE) was lyophilised (28.3 g), re-suspended in ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... 2. Dressman, B. A.; Spangle, L. A.; Kaldor, S. W.; Tetrahedron Lett. 1996, 37, 937; Hanessian, S.; Yang, R. Y.; Tetrahedron Lett. 1996, 37, 5835; Bunin, B. A.; Ellman, J. A.; J. Am. Chem. Soc. ... See full document
4
J. Braz. Chem. Soc. vol.14 número3
... During the research on heterogenized rhenium oxide- based catalysts, we noticed that in some cases the alumina support showed considerable catalytic activity. 36 Although[r] ... See full document
7
J. Braz. Chem. Soc. vol.14 número3
... same stereochemistry as H-6 in 1 and 5. The β-hydroxyl substitution at C-3 was inferred by the chemical shift and multiplicity of the axial H-3 observed as a double doublet at δ 4.26 (J 11.4 and 4.1 Hz). Thus, ... See full document
5
J. Braz. Chem. Soc. vol.14 número3
... CDCl 3 or DMSO-d 6 as solvent on a Bruker ACF-250 spectrometer at 250.13 and 62.9 MHz, respectively. Chemical shifts (δ) are given in ppm downfield from tetramethylsilane as the internal standard, and coupling constants ... See full document
4
J. Braz. Chem. Soc. vol.14 número3
... Twenty replications were prepared for each culture and for each sampling week (7 - 14 -21 - 28 days). Each replication consisted of one Petri dish. From these Petri dishes, three of them were randomly chosen to ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... compound had signals for a p-hydroxybenzoate group [δ 7.92 (2H, dd, J 9.0 Hz, 2.1 Hz) and δ 6.83 (2H, dd, J 9.0 Hz, 2.1 Hz), δ 168.7 (C-7’), 163.6, (C-4’), 133.0 (CH-2’ and CH- 6’), 123.0 (C-1’), 116.2 ... See full document
4
J. Braz. Chem. Soc. vol.14 número3
... In order to establish the best conditions for orange juice sample preparation by using the proposed on-line flow digestion system, the optimum sample and reagent loops volume, reagent co[r] ... See full document
7
J. Braz. Chem. Soc. vol.14 número3
... for the OER, supporting coating with 50-100 mol% RuO 2 contents present a better selectivity for chlorine production. The inset in Figure 8B shows a sudden increase in j/q a - ratio with the introduction of only ... See full document
8
J. Braz. Chem. Soc. vol.14 número3
... Group II is formed by 27 samples of propolis collected mainly in Southern Brazil (States of Paraná and Rio Grande do Sul), along with samples from other parts of the country, one sample from Uruguay (Pr24 (12)) and two ... See full document
4
J. Braz. Chem. Soc. vol.14 número3
... Based on these encouraging results other halides were examined under the conditions of experiment entry 7. Benzyl chloride led to the coupling product in lower yield (entry 8) and the introduction of the p-methoxy ... See full document
6
J. Braz. Chem. Soc. vol.14 número3
... the Imbé and the Ururaí sediments have lower carbon contents and organic extract percentage (0.009% and 0.042%, respectively) than the sediments of Lake de Cima and the Urubu (Table 1)..[r] ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... With the SISTAX program development, the expert system SISTEMAT acquires a new tool that allows the search for requirements such as chemical classes, carbon skeletons and substructures a[r] ... See full document
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J. Braz. Chem. Soc. vol.14 número3
... The sampling loop, reactors and transmission lines were build-up with i.d. 0.7 mm polyethylene tubing of the non- collapsible wall type. For transferring the gaseous species from the donor to the acceptor stream, a ... See full document
5
J. Braz. Chem. Soc. vol.14 número3
... magnifica , Murraya paniculata , Citrus sinensis graft (Rutaceae), Lonchocarpus montanus (Leguminosae) were evaluated for their ability to inhibit the enzymatic activity of the prot[r] ... See full document
8
J. Braz. Chem. Soc. vol.14 número3
... Do extrato etanólico da madeira de Annona dióica foram isoladas as conhecidas 1-aza-4- metilantraquinona, lasiodiplodina, liriodenina, uma mistura de 1-aza-5,9,10-trimetoxi-4-metil-2-oxo- 1,2-diidroantraceno e ... See full document
5
J. Braz. Chem. Soc. vol.14 número3
... Because samples 14 to 18 are some of the most commercially important hop products they were selected to determine their correlations with the remaining samples. The statistical comparison of hops of the Saaz ... See full document
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