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J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Neste ano publicaremos dois números especiais. O primeiro deles será composto por contribuições de autores brasileiros e mexicanos e será preparado conjuntamente pelos editores do JBCS e da Revista Mexicana de Química, ... See full document

1

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Nevertheless, there are several reasons for our belief that aggregation predominates over the conformational disorder: ( i ) there is a relative increase of the band at 600 nm where the [r] ... See full document

13

J. Braz. Chem. Soc.  vol.16 número1 en a01v16n1

J. Braz. Chem. Soc. vol.16 número1 en a01v16n1

... of Prof. Raimundo Braz Filho, highlighting his contributions to Brazilian Chemistry. Due to the increase in the number of submissions and in order to prevent special issues from obstructing the flow of regular ... See full document

1

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... a 90º flip angle (11 ms) and 1s relaxation delay in 16 scans. An exponential function with Lb = 0.3 Hz was applied before Fourier transformation to enhance the spectral resolution. The number of data points ... See full document

4

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... We hereby present our results in the selective and fast oxidation of aniline by hydrogen peroxide in the presence of several simple heteropolyoxometalates at room temperature under simpl[r] ... See full document

4

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Changing the P content, Pd-P electroless alloys display different crystalline/amorphous character and thus the investigation of their electrocatalytic activity in a potential domain suit[r] ... See full document

5

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... The computer code used to calculate the probability density function from the annihilation spectra has 600 lines of code and the computer time to obtain a given value of f ( λ ), such a[r] ... See full document

5

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... The sensibility increasing with the length of cooling coil can also be related with the increase of traveling time leading to more complete aldazine formation, since the selected heating[r] ... See full document

6

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... From the experimental results obtained from electrochemical impedance spectroscopy (pore resistance, coating capacitance, charge-transfer resistance, double- layer capacitance, relative [r] ... See full document

5

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... The ultrasound assisted metal extraction with water soluble tertiary amines (CFA-C reagent) in presence of hydrogen peroxide was used for improving metal solubilization in fish samples..[r] ... See full document

5

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... E pa (V) for the cyclic voltammograms obtained at different pH values (inside parenthesis) for the solutions of the ligands APA and 3-NPA and Molybdenum (MoO 2 = M) and the ligands in [r] ... See full document

9

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Dissolution experiments in Milli-Q water using samples PRA and PRA 1 showed that the equilibrium of Ca and P was no longer achieved even for dissolution times up to 240 hours (data not s[r] ... See full document

7

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... A temptative calculation, based on frozen core calculations and symmetry based orbital excitations to IVO orbitals, revealed that the simple initial state proposition, where the NEXAFS s[r] ... See full document

6

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... analyzing systems I , the importance of the matrix composition is clear as the catalyst based on the inorganic matrix ( Ia ) did not present any activity; for a hybrid matrix based on 1[r] ... See full document

7

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Considering the comments pointed out above, in this work one intend to develop an automated procedure for the determination of lactate in fermented sugar cane juice using lactate oxidase[r] ... See full document

4

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... Tests of PS in exposure chamber showed that: to a large extent sampler performance was not influenced by variation of relative humidity of tested air (20-80%); sampler remains stable for[r] ... See full document

8

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... with MLR models which are simpler to calibrate and interpret than PCR and PLS models. With variable selection the number of wavelengths was significantly reduced from 61 to 16 at most for the manganese in MLR-SPA. ... See full document

4

J. Braz. Chem. Soc.  vol.16 número1

J. Braz. Chem. Soc. vol.16 número1

... The electrochemical impedance results together with imaging techniques demonstrated a remarkable improvement of the corrosion resistance of copper in sulphuric acid for specimens spontan[r] ... See full document

8

J. Braz. Chem. Soc.  vol.16 número6B

J. Braz. Chem. Soc. vol.16 número6B

... compounds (1) and (3) (Table 2). DEPT experiment, however, presented three signals related to methylenic carbons in (3) and only two signals related to methylenic carbons in (1). The hydroxyl group, shown to be present ... See full document

6

J. Braz. Chem. Soc.  vol.16 número6B

J. Braz. Chem. Soc. vol.16 número6B

... spectrum corroborated with these observations, through the absence of the singlets relative to both methyl and aldehyde hydrogens, besides the presence of additional signals for an AB system at δ 5.03 (d, J 12.5, ... See full document

6

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