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J. Braz. Chem. Soc. vol.8 número2 en a01v08n2
... sci en ti fic me e tings held in Bra zil or el sew he re but with strong Bra zi li an par ti ci pa ti on, this spe ci al is sue on Elec tro che mistry co vers some of the ma - te ri als pre sen ted and dis cus sed ... See full document
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J. Braz. Chem. Soc. vol.8 número6
... Ke naf may well be co me a pro blem for the many Bra zi li ans who se ear nings come from na tu ral fi ber pro - duc ti on, of ten un der pri mi ti ve tech no lo gi cal stan dards. Be yond that, we have many ca ses of fi ... See full document
1
J. Braz. Chem. Soc. vol.8 número6
... cluded in Tables 6 and 7. The corresponding analysis of the variance values are given in Table 5. The anomalous be- haviors of the 50/50 PEMA/PVDF energy and strength at break values may result from a higher ... See full document
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J. Braz. Chem. Soc. vol.8 número6
... The XRD results of the K + saturated and heated clay fraction confirmed that the natural clay belongs to the 2:1 clay-mineral group, whereas the analysis of the Mg 2+ saturated and gly[r] ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... An in cre a se in the Che mistry re se arch fun ding will no doubt help the fi eld to im pro ve its un com for ta ble 34 th pla ce in the world ran king, wich in in com pa ti ble with the in por tan ce of the Bra zi li ... See full document
1
J. Braz. Chem. Soc. vol.8 número6
... The guanidinoacetic acid (GAA) complexation with some ions of biological interest, such as Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pb(II) has been investigated. GAA was prepared and analysed. The dissociation ... See full document
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J. Braz. Chem. Soc. vol.8 número6
... derivatization of glucose oxidase with ferrocene deriva- tives was evaluated by following the quenching of trypto- phan fluorescence. The results of voltammetric dilution experiments were also consistent with ... See full document
12
J. Braz. Chem. Soc. vol.8 número4
... There has been a great deal of talk about the glob al - iza tion of the econ omy, and the re cent pri vat iza tion of large state com pa nies has dem on strated that the Bra zil - ian gov ern ment is par ti san and a de ... See full document
1
J. Braz. Chem. Soc. vol.8 número2
... tro chem i cally treated comminuted ga - lena with a par ti cle size of 208 µ m, in an elec tro chem i cal cell, with a work ing elec trode of par tic u late ga lena in a plat i num bas ... See full document
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J. Braz. Chem. Soc. vol.8 número2
... For co balt(II) and nickel(II), the elec tro chem i cal ki - netic fac tor is pre pon der ant up to azide con cen tra tions of 0.70 and 0.50 mol/L, re spec tively, and then the re duc tion waves shift to wards ... See full document
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J. Braz. Chem. Soc. vol.8 número2
... A typ i cal voltammogram of the poly-Bz elec trode, pre - pared as de scribed above, is shown in Fig. 1. Its re dox re - sponse shows only one peak sys tem, the an odic and cath odic peaks ap pear ing at 0.185 and 0.160 ... See full document
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J. Braz. Chem. Soc. vol.8 número6
... proposed a procedure for the simultaneous determination of iron, manganese, copper, zinc and nickel in sea water by a combination of ion-exchange preconcentration and ICP- AES. The sample is passed through a Chelex-100 ... See full document
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J. Braz. Chem. Soc. vol.8 número4
... Car bo xi me til ce lu lo se (de ri va do da ce lu lo se) na for ma áci da (CMCH), foi uti li za da como fase es ta ci o ná ria em uma co lu na cro ma to grá fi ca na pré-concentração dos cá ti ons Cd(II), Cr(III), ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... is attributed to an -NH group, indicating that the acylhydrazone form predominates over the azo form (Fig. 1) 22 . Careful analysis of hydrogen and carbon-13 nuclear magnetic resonance (NMR) spectra of these derivatives ... See full document
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J. Braz. Chem. Soc. vol.8 número3
... size dis per sity no ti ce ably de cre a sed. The par ti cle size and par ti cle size dis tri bu ti on of the mo di fi er have a strong in flu - en ce on the fi nal pro per ti es 13 of the blends in ves ti ga ted. ... See full document
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J. Braz. Chem. Soc. vol.8 número4
... As pre sen ted in Lloyd 7 and Vo-Dinh 8 , the synchro - nous-scan flu o res cen ce spec tra pre sent com bi ned pro per ti - es of both emis si on and ex ci ta ti on spec tra. This le ads to an in cre a se in se ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... Potentiometric equilibrium curve of Obisdien.6HBr in the presence of Mg(II), sulfate, selenite, and selenate ions under nitrogen is shown in Fig. 8. The shape of de curve is about the same as the one in presence ... See full document
11
J. Braz. Chem. Soc. vol.8 número6
... that en- compass the whole film, leading to a constant capacitance, whose value reflects both the thickness and the relative permittivity of the film according to ... See full document
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J. Braz. Chem. Soc. vol.8 número3
... we en ter into the 21st cen tury and with so many chal len ges to over co me, it is dif fi cult to un ders tand why the Uni ver sity and the Bra zi li an che mi cal in dustry are so dis tant from one anot ...the ... See full document
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J. Braz. Chem. Soc. vol.8 número5
... 10. Johnson, C.K. ORTEP; Report ORNL-3794; Oak Ridge National Laboratory: Oak Ridge, TN, 1965. 11. Crabtree, R.H.; Lavin, M. Inorg. Chem. 1986, 25, 805. 12. Puddephatt, R.J.; Rashidi, M.; Vittal, J.J. J. ... See full document
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