[PDF] Top 20 J. Braz. Chem. Soc. vol.20 número2 en a01v20n2
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J. Braz. Chem. Soc. vol.20 número2 en a01v20n2
... As an Editor, Maria has had decisive participation in a large number of events during JBCS maturing phase: in the preparation and implementation of the on-line manuscript s[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número5 en v20n5a01
... innovation as the pillars that sustain a developed and sovereign nation. In central countries, technological innovation is the result of a combination of factors having as their base a solid educational system at all ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... The hydazines/hydrazides (1.0 mmol) and Sc(OTf) 3 (2 mol %) were placed in a Schlenk reaction tube with efficient stirring or mixing, then 1,3-diketone (1.0 mmol) was added. The mixture was stirred for 20 min at ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... The air-dried and pulverized roots (500 g) of R. leptopetala were washed with 20% (v/v) aqueous NH 4 OH, and extracted with CH 2 Cl 2 in a Soxhlet apparatus. The organic solution was distilled under reduced ... See full document
15
J. Braz. Chem. Soc. vol.20 número2
... Solvents were removed under reduced pressure and the dichloromethane residue (8.2 g) was submitted to column chromatography, carried out in a gradient system from hexane,[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... Powdered roots (330 g) were extracted in CHCl 3 for 7 days. The CHCl 3 extract was concentrated to a small volume at reduced pressure to yield 1.3 g of oily residue. This residue was fractionated on a silica gel column ... See full document
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J. Braz. Chem. Soc. vol.20 número7 en a01v20n7
... You are the future of the chemical sciences in your country and will be part of the increasingly important global network of chemists that will use our science to address prob[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número6 en a01v20n6
... Neither Eldorado or a Green Hell, the Amazon is a region rich in natural resources that needs science, technology and innovation to develop with sustainability. The edit[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... comemoração ao 20º aniversário do JBCS, com contribuições de colegas que durante esses anos estiveram mais proximamente ligados à revista, em atividades editoriais ou, destacadame[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número10
... últimos 20 anos, dobrou, enquanto o número de retratações aumentou 20 vezes, possivelmente como consequência do aparecimento de melhores sistemas de detecção, especialmente de plágio como o Déjà vu, 5 e ... See full document
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J. Braz. Chem. Soc. vol.20 número10
... last 20 years has doubled, but the number of retractions has increased 20 times, possibly due to improved detection systems, especially for plagiarism, such as “Déjà vu”, 5 and ... See full document
1
J. Braz. Chem. Soc. vol.20 número10
... 174 Results for biodiesel from different fat sources agreed with those obtained by the procedures recommended by the European norms EN14108 and EN14109 based on sample dilution[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número10
... Tyr 20, it may be concluded that a change in the structure of calyx (Trp 19 environment) may affect the adjacent residue (Tyr 20) and move it into a less hydrophobic environment (Figure ... See full document
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J. Braz. Chem. Soc. vol.20 número10
... their written informed consent prior to anticipating in the study at Ramadan Specialized Hospital (Tanta City, Egypt). They were caffeine and alcohol free and avoided all medication for at least 24 h before and during ... See full document
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J. Braz. Chem. Soc. vol.20 número9
... If this indicator were to be adopted and carefully evaluated for the graduate programs in chemistry, in addition to the present evaluations of master’s and doctorate degrees aw[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número10
... signal height (experiments #1 and #2) should be about 1.2 times higher than the observed height due to linearity loss. The purpose of the irst two experiments is to show that UV irradiation is the main factor involved in ... See full document
5
J. Braz. Chem. Soc. vol.20 número2
... Square-Wave Voltammetric Determination of Acetylsalicylic Acid in Pharmaceutical Formulations using a Boron-Doped Diamond Electrode without the Need of Previous.. Alkaline Hydrolysis St[r] ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... After 4 hours, an oily phase was formed. Carbonate buffer was added to this phase to reach pH 11. Dichloromethane was added 3 times in aliquots of 20 mL. After each addition, the aqueous phase was separated and ... See full document
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J. Braz. Chem. Soc. vol.20 número2
... 5. Sisido, K.; Takeda, Y.; Kinugawa, Z.; J. Am. Chem. Soc. 1961, 83, 538; Perrin, D. D.; Armarego, W. L. F.; Purification of Laboratory Chemicals, Butterworth Heinemann: Oxford, 1988; Mendham, ... See full document
10
J. Braz. Chem. Soc. vol.20 número2
... The mono-benzyl-glycerol ether was the main product in the reactions catalyzed by β zeolite and Amberlyst-35 acid resin, whereas di-benzyl-ether was formed in higher yield with the u[r] ... See full document
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