[PDF] Top 20 J. Braz. Chem. Soc. vol.24 número12
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J. Braz. Chem. Soc. vol.24 número12
... A partir das várias discussões que temos tido em torno desse tema, gostaríamos de chamar a atenção para a formação de dois profissionais de química que, em nossa opinião, têm papel es[r] ... See full document
2
J. Braz. Chem. Soc. vol.24 número12
... Among the methods assessed to measure the solubility parameter, the one based on the maximum absorbance, of the sample dispersed in solvents with different solubility parameters, dete[r] ... See full document
10
J. Braz. Chem. Soc. vol.24 número12
... No doubt high school teachers are the most influential leaders to change the perception about chemistry in our society, for the best and for the worst.. That is why we should give ou[r] ... See full document
2
J. Braz. Chem. Soc. vol.24 número12
... addition of nitrogen into the C-4 of 1,1,1-trichloro- 4-methoxy-3-alken-2-ones. Then, one molecule of methanol is eliminated to give the enaminoketone intermediate, which isomerizes to thermodynamically more stable ... See full document
38
J. Braz. Chem. Soc. vol.24 número12
... Prior to electrolysis, the particle electrodes were first soaked in methyl orange solution for 24 h to decrease the effect of the adsorption of particle electrodes on the decolorization ratio. The particle ... See full document
9
J. Braz. Chem. Soc. vol.24 número12
... The optimized and validated SLE/LTP technique was applied in potato and soil samples obtained from the container in which the potatoes were grown to determine the presence of chlorpyr[r] ... See full document
8
J. Braz. Chem. Soc. vol.24 número12
... to overcome this effect, pyrolysis and atomization curves were also conducted using a graphite platform containing 480 µg Zr as a permanent chemical modifier, which could inhibit the [r] ... See full document
9
J. Braz. Chem. Soc. vol.24 número12
... C eigenvalue whose real part is negative and large in magnitude C compared to the reciprocal of the t span of interest. If the C problem is nonstiff, use method lag MF = 10. If it is stiff, C there are four standard ... See full document
76
J. Braz. Chem. Soc. vol.24 número12
... Optical rotations were measured with a Horiba SEPA-300 polarimeter. UV spectra were obtained using a Shimadzu UV-2401A spectrophotometer. CD spectra were measured on a JASCO J-810 spectropolarimeter. A Tenor 27 ... See full document
14
J. Braz. Chem. Soc. vol.24 número12
... The aim of the present work was to optimize a procedure for extraction of humic substances (HS) from peat, using continuous flow with different extractants (NaOH, KOH and Na 4 P 2 O 7 )[r] ... See full document
6
J. Braz. Chem. Soc. vol.24 número12
... We evaluated the influence of equilibrium constant on the concentration profiles of all species (“living”, “dormant” and “dead” polymer) involved in the process and also the influence[r] ... See full document
7
J. Braz. Chem. Soc. vol.24 número12
... liquid chromatography (HPLC)-grade acetonitrile was purchased from J. T. Baker, and Milli-Q pure water was obtained from a Milli-Q Plus ultra-pure water purification system purchased from Millipore. The PAMPA ... See full document
31
J. Braz. Chem. Soc. vol.24 número12
... In the present study, on comparing the absorbance of colloidal silver nanoparticles with their size determined by NTA analysis reveals that with the increase in the particle size, the absorbance spectra shifts towards ... See full document
12
J. Braz. Chem. Soc. vol.24 número12
... These compounds were prepared from 1,3-dipolar cycloaddition of an azomethine ylide generated from acenaphthenequinone and 1,2,3,4-tetrahydroisoquinoline via [1,5]- H shift, with chal[r] ... See full document
64
J. Braz. Chem. Soc. vol.24 número12
... Three new neo-clerodanes, antiscorbuticane A, antiscorbuticane B and antiscorbuticane C, and known compounds glutinol, friedelin, 5,7-dihydroxyflavanone (pinocembrin), 5-hydroxy-3,6,7,4[r] ... See full document
18
J. Braz. Chem. Soc. vol.24 número12
... Changes were observed in the currents and peak potentials of the nucleotide voltammograms in the presence of the pesticides, with dependence on the pesticide concentration (from 5.0 × [r] ... See full document
8
J. Braz. Chem. Soc. vol.24 número12
... Figures S50-S69: Stereoisomers of epoxydiene 1 obtained by Sharpless epoxidation Figures S70-S74: Stereoisomers of epoxydiene 1 obtained by organocatalytic epoxidation Figure S75: [r] ... See full document
48
J. Braz. Chem. Soc. vol.24 número12
... 27 Gondry, M.; Sauguet, L.; Belin, P.; Thai, R.; Amouroux, R.; Tellier, C.; Tuphile, K.; Jacquet, M.; Braud, S.; Courçon, M.; Masson, C.; Dubois, S.; Lautru, S.; Lecoq, A.; Hashimoto, S.; Genet, R.; Pernodet, J.; ... See full document
28
J. Braz. Chem. Soc. vol.24 número12
... Equation 12 was considered to be the final expression for the first contribution to the general equation 3 responsible for the temperature dependence of the calorific value. For validation of equation 12 we used the ... See full document
12
J. Braz. Chem. Soc. vol.24 número12
... spectroscopy) and HMQC) spectra of the hydroxylactone 4 that was obtained microbiologically and bromolactone 2 allowed for the identification of differences between both molecules. The coupling constants of H-1 with H-2 ... See full document
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