[PDF] Top 20 J. Braz. Chem. Soc. vol.10 número5

J. Braz. Chem. Soc. vol.10 número5

... sen vol vi do no país, pode ter ta ma nha im por tân cia ao pon to de ser se ri a men te co gi ta do para re ce ber o ma i or grau de re co nhe - ci men to ci en tí fi ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... In the present work, two electrochromic devices (or electrochromic windows) based on intrin- sically conducting polymers were assembled and characterized. For both devices, the materials used on the assembling were the ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... x 10 -13 mol cm -2 ( δ = Nf/S BET , onde Nf é a quantidade de Co-Ftalocianina adsorvida por grama de silica gel modificada ...x 10 -4 e 3,2 x 10 -3 mol L -1 , associado com sua alta estabilidade ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... an equimolar amount of methyltriphenylphosphonium bro- mide and the mixture heated to reflux. After 45 min most of the benzene was distilled off under nitrogen until the temperature of the remaining slurry reached 85 °C. ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... 38. Gaussian 94, Revision D.2, Frisch, M.J.; Trucks, G.W.; Schlegel, H.B.; Gill, P.M.W.; Johnson, B.G.; Robb, M.A.; Cheeseman, J.R.; Keith, T.; Petersson, G.A.; Montgomery, J.A.; Raghavachari, K.; Al-La- ham, M.A.; ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... sition of 1-(3-azidobenzyl)-5,6-dimethoxy-2-methyl- 1,2,3,4-tetrahydroisoquinoline in TFA/TFMSA at -5 °C was observed to afford pronuciferine in 5% yield together with uncyclised amine (16%) [precursor to starting azide] ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... The anti-aggregating activity of these new derivatives ( 10a-d ) on platelet aggregation induced by ADP, collagen, arachidonic acid and U-46619, indicates an important antithrombotic pro[r] ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... NCS and SSO. Eight different theoretical approaches were tested. They are listed in Table 1. The first six approaches, I.A,-II.C, are based on density functional methods. They are six different combinations out of two ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... In order to identify the reaction products a preparative photolysis was carried out. Thus, 1.6 mmoles of the dicy- anoolefin 3-MDCN in hexane (100 mL) were degassed and irradiated for 5 h. A yellow oil was obtained after ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... 1-(4’-Hidroxi-5’-metil-2’-metoxifenil)-3-(2"-hidroxi-4",5"-metileno-dioxifenil)propano ( 7 ), 1,3-diarilpropano isolado de Iryanthera laevis (Myristicaceae), 1-(4’-hidroxi-2’-metoxifenil)-3- ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... of 10 trajectories representative of the average behavior of the process with an incident energy of 40 ...of 10 typical trajectories at this collision energy represented in ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... desired configuration to be obtained in good enantiomeric excess. Thus, the introduction of allyl alcohol or an α, β-unsaturated carbonyl compound shifts the stereoselectiv- ity of the reduction toward the D isomer 8 , ... See full document

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J. Braz. Chem. Soc. vol.10 número5

... n-Butyllithium in hexane (13.6 mL, 22 mmol) was added dropwise at -78 °C to a solution of 2,4,4-trimethyl- 2-oxazoline (2.486 g, 22 mmol) in dry THF (20 mL), under nitrogen. After stirring for 30 minutes, the resulting ... See full document

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J. Braz. Chem. Soc. vol.10 número6

... reactions (36) and (10), respectively. Since photolysis light intensities during the experiments were not reported 26 , the ethyl nitrite photodecomposition coefficient was estimated from the experimental ... See full document

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J. Braz. Chem. Soc. vol.10 número4

... Dicyclopropylketone and benzophenone, however, did not react under these conditions. A reaction employing the procedure described above was also performed using tetra- phenylcyclopentadienone. After quenching (sodium ... See full document

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J. Braz. Chem. Soc. vol.10 número3

... The aquatic humic substances investigated in this study were conventionally isolated from Rio Negro waters - Amazonas State/Brazil by means of the collector XAD 8. Molecular spectroscopy investigations of these humic ... See full document

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J. Braz. Chem. Soc. vol.10 número6

... in the initial part of the voltammogram since only reactions (8-10) are slowly occurring and blocking the surface. When the potential reaches ca. 1.0 V, the oxidation of the Pd surface starts (11) and, ... See full document

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J. Braz. Chem. Soc. vol.10 número4

... between 10 kHz and 90 ...x 10 -9 ) at this field and room temperature, the resulting spectrum demonstrates the high sensitivity of the SQUID detection ...x 10 -2 , an enhancement of seven orders of ... See full document

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J. Braz. Chem. Soc. vol.10 número4

... Fig. 10 shows the 129 Xe spectra of three EPDM samples filled with the carbon blacks N110, N330 and N550, which have aggregate sizes of 18, 30 and 56 nm, ...Fig. 10 is a slight broadening of the EPDM line ... See full document

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J. Braz. Chem. Soc. vol.10 número6

... con se quen ce the mo du la ti on pe ri od of the qua si pe ri o dic os cil la ti ons ap pro a ches in fi nity as the for cing fre quency is in cre a sed to wards the cri ti cal va lue of ω = 0.8525, Fig. 2. The emer ... See full document

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