[PDF] Top 20 J. Braz. Chem. Soc. vol.15 número1
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J. Braz. Chem. Soc. vol.15 número1
... There was quite a significant increase in the number of articles submitted in 2003 compared to 2002 (over 20%), confirming the ever increasing desire by authors to have the results of th[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... stations 14, 15 and 16. Station 18, where the largest Cd value was observed, is a site of P. perna cultivation. As there are no identified sources of Cd in the vicinities of this site a possibility arises that ... See full document
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J. Braz. Chem. Soc. vol.15 número1 pt a01v15n1
... Entretanto, a análise das estatísticas mais recentes indica que isto ainda está longe, e que há muito espaço para crescimento da revista, tanto em termos quantitativos como qualitativos,[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... The method using TAR as spectrophotometric reagent to determine chromium in the presence of CTAB is selective, rapid, and simple. Many interferents can be completely masked with EDTA and[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... Herein is reported the preparation of iodohydrins in good yields by the reaction of alkenes (ciclohexene, styrene, α -methylstyrene, and 1-octene) with iodine and water at room temperat[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... AA’BB’ at δ 7.00 (d, 2H) and 7.84 (d, 2H) of four aromatic rings. The additional signal at δ 13.58 (s, 2H) of two chelated hydroxyls and a multiplet at δ 7.83 and 7.85 for hydrogens connected at a and β carbons [(δ CH ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... consequently, the two ketone carbonyl groups (δ C 192.64, C-11, and 201.08, C-14) were located at a methyl- cyclopentene ring, which was confirmed by heteronuclear long-range of these carbons with H-13 and 3H-15 ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... 1. For important reviews, see: Gates, B.C.; Guczi, L.; Knozinger, H; Metal Clusters in Catalysis, Elsevier: Amsterdam, 1986; Ozin, G.A.; Gil, C.; Chem. Rev. 1989, 89, 1749; Ozin, G.A.; Kuperman, A.; Stein, A.; ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... In pollution abatement works, organic carbon measurement provides a quick and simple method for monitoring pollution levels as well as the accumulation of non biodegradable or refractory[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... results of a multivariate model in ecological applications, the degrees of freedom per variable should be at least 30, as a consequence, for 44 samples no more than 24 variables should be used for the Principal Component ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... Table 1 lists physical data (particle shape, particle size, pore size, specific volume and specific surface area) of each of the silicas prior to PMOS loading, the % of PMOS contained in[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... Software, written in Microsoft VisualBasic 3.0, allowed the computer to control the system in order to carry out a complete titration, estimating its end point using the Gran method and [r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... The method for thiamin, riboflavin and pyridoxine determination using Reversed Phase High Performance Liquid Chromatography Method (RP - HPLC) was based on the Bianchini and Penteado pro[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... 18 have used unloaded polyurethane foam for cobalt retention (as thiocyanate complex) and the introduction of the solid into the graphite furnace for Co determination in biological and [r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... Chemical shifts are expressed as δ (ppm) relative to TMS as internal standard and the J values are given in Hz. Elemental analyses were recorded on a Perkin – Elmer 2400 CHN elemental analyzer. The products were ... See full document
6
J. Braz. Chem. Soc. vol.15 número1
... -o-bromophenylacetonitrile (2.44 g, 12.4 mmol), sulfuric acid (26 mL )and water (35 mL) was refluxed for 4 h. The reaction mixture was poured over ice and, after cooling to room temperature, extracted with ether (3 x 70 ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... This work was supported by Brazilian PRONEX Program (Contract Number 41.96.0884.00), whose help we gratefully acknowledge. We thank Prof. Henrique Eisi Toma (Institute of Chemistry – USP, Brasil) and Prof. Carlos ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... The electrochemical processes occurring at both edges of the wide electrochemical window of the boron doped diamond (BDD) electrode were studied by polarization curves experiments to eva[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... The results showed that the amount and line width of semiquinone free radical from whole soil samples had good correlation with humin fraction and no correlation with humic and fulvic ac[r] ... See full document
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J. Braz. Chem. Soc. vol.15 número1
... The flow system was constructed with computer- controlled sliding-bar commutator and three-way solenoid valves (NResearch, 161T031), 0.7 mm i.d. polyethylene tubes and Perspex joint points. The resin columns were ... See full document
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