[PDF] Top 20 J. Braz. Chem. Soc. vol.25 número9
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J. Braz. Chem. Soc. vol.25 número9
... Voltammetric Determination of Gabapentin by a Carbon Ceramic Electrode Modified with Multiwalled Carbon Nanotubes and Nickel-Catechol Complex.. Fahimeh Jalali, * Zahra Hassanvand and P[r] ... See full document
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J. Braz. Chem. Soc. vol.25 número9
... When tuberculosis becomes active, 70-75% of cases manifest as pulmonary tuberculosis which infects the lungs and the symptoms are well known and documented. The other 25-30% of cases are termed extrapulmonary ... See full document
6
J. Braz. Chem. Soc. vol.25 número9
... When the ethanol:oil molar ratio is more than 30:1, the FAEE content in UPO biodiesel increases slower than that in RPO biodiesel because the FFA concentration in UPO was diluted by ethanol. Because the FFA in UPO ... See full document
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J. Braz. Chem. Soc. vol.25 número9
... was prepared by dissolving a precisely weighed out quantity of the analyte in ethanol/water (1:4, v/v). Different concentrations were then prepared by diluting aliquots of the stock standard solution in Britton-Robinson ... See full document
9
J. Braz. Chem. Soc. vol.25 número9
... The trap grease biodiesel obtained from microwave assisted reactions showed a high conversion (96%) even at mild reaction conditions (trap grease:methanol molar ratio 1:6, 1.0% H 2 SO 4[r] ... See full document
7
J. Braz. Chem. Soc. vol.25 número9
... Among various initial concentrations of surfactant, SDS-modified alumina and CTAB-modified silica treated at the CMC showed the highest sorption percentages for most of carbamate pesticides. At the CMC, surfactant ... See full document
10
J. Braz. Chem. Soc. vol.25 número9
... response variability can be explained by the previously discussed model (equation 2). The model’s regression F-value (104.58), with p-value < 0.0001, implies that it is significant at 95% confidence, because p value ... See full document
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J. Braz. Chem. Soc. vol.25 número9
... these effects are reflected in a decrease in the rate of reaction as the relative permittivity decreases. The activation entropy was negative for all the two amino acids. The polar nature of the transition state leads to ... See full document
7
J. Braz. Chem. Soc. vol.25 número9
... Three parallel experiments were conducted under the model optimal conditions of 3.33 w 0 ([H 2 O]/[surfactant]), 4.2 h reaction time, 5:1 methanol/ acid molar ratio, 130 mg g –1 lipa[r] ... See full document
8
J. Braz. Chem. Soc. vol.25 número9
... GC-FID analysis was performed on a gas chromatograph model 6890N (Agilent Technologies) equipped with a flame ionization detector and an autosampler 7683B Series (Agilent Technologies). The chromatographic conditions ... See full document
8
J. Braz. Chem. Soc. vol.25 número9
... Chemical shifts (d) and J values are reported in ppm and Hz, respectively. Multiplicities are shown as the abbreviations: s (singlet), d (doublet), t (triplet), m (multiplet). Electrospray ionization mass ... See full document
8
J. Braz. Chem. Soc. vol.25 número9
... The aim of the work is to develop and validate for the first time an Orbitrap method for the separation and determination of two glycoalkaloids ( α -solanine and α -chaconine) and tw[r] ... See full document
7
J. Braz. Chem. Soc. vol.25 número9
... Degradation of Dipyrone by the Electro-Fenton Process in an Electrochemical Flow Reactor with a Modified Gas Diffusion Electrode.. Willyam R.[r] ... See full document
8
J. Braz. Chem. Soc. vol.25 número9
... fact that the reduced pressure of the spray chamber resulted in a decrease of the analytical signal for all elements, no significant differences were observed on the LODs, and low LOD[r] ... See full document
6
J. Braz. Chem. Soc. vol.25 número9
... The aim of this work was to develop a quick direct analytical technique for the determination of oleic acid content in soybean oil by non-aqueous capillary electrophoresis with capaciti[r] ... See full document
5
J. Braz. Chem. Soc. vol.25 número9
... (a) Images of uncharacterized pieces of the analyzed document; (b) absorbance spectra of the inks present in the pages analyzed; (c) discrimination of the inks by the PLS-DA model for d[r] ... See full document
13
J. Braz. Chem. Soc. vol.25 número9
... In this work a set of three different types of Iberian pig ham (a high value dry-cured product) known as Cebo, Recebo and Bellota and two different types of white pig ham Serrano and [r] ... See full document
6
J. Braz. Chem. Soc. vol.25 número9
... The accuracy was obtained by the evaluation of 4 multielement standard solutions with concentrations belonging to the working range: 0.2, 0.5, 1.0 and 5.0 mg L −1 , added to the matri[r] ... See full document
12
J. Braz. Chem. Soc. vol.25 número9
... The decomposition after a third reuse cycle is not a great problem because the compounds formed could be calcined to reform the calcium oxide (CaO) and the glycerol synthesized as co-[r] ... See full document
9
J. Braz. Chem. Soc. vol.25 número9
... Secondly, the parameters that were significant (indicated by a Pareto chart) were optimized by a response surface methodology through a Doehlert matrix. The variables evaluated in this case were sample amount at five ... See full document
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