6/9/2012
Saiu o JBCS número 8 - Volume 23
There Is No Future without Good Primary Education
"Water dropping day by day wears the hardest rock away". This popular saying should enlighten and guide the actions of all those comitted to improving the educational level and reducing truancy in Brazilian schools.
Sometimes, we seem to forget that from 100 students who start primary school, 44 make it to high school and only 12 go to college. Still worse is the fact that from those 12, not all manage to graduate and many exceed the regular periods of their courses.
(Read more at Editorial)
Table of Contents with Graphical Abstracts
Iron(III) Porphyrin Covalently Supported onto Magnetic Amino-Functionalized
Nanospheres as Catalyst for Hydrocarbon and Herbicide Oxidations |
| Joicy S. dos Santos, André L. Faria, Patrícia M. da Silva Amorin, Franco M. La Luna, Kely L. Caiado, Débora O. C. e Silva, Patrícia P. C. Sartoratto and Marilda D. Assis |
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This work describes a new magnetic catalyst composed of an ironporphyrin, 5,10,15,20-tetrakis(pentafluorophenyl) porphyrin iron(III) chloride, FeTFPP, covalently immobilized onto magnetic maghemite nanospheres covered with aminofunctionalized silica. The catalyst can be easily recovered and washed after reaction through application of an external magnetic field, which favors its reuse. This catalytic system proved to be efficient and selective for hydrocarbon oxidation, specially R(+)-limonene, a compound present in orange peels and in the herbicide simazine, frequently used on sugar cane crops. Details are discussed on page 1411.
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>> Editorial(319 KB)
There Is No Future without Good Primary Education
Angelo C. Pinto |
| J. Braz. Chem. Soc. 2012, 23, 1409 |
Iron(III) Porphyrin Covalently Supported onto Magnetic Amino-Functionalized
Nanospheres as Catalyst for Hydrocarbon and Herbicide Oxidations |
| Joicy S. dos Santos, André L. Faria, Patrícia M. da Silva Amorin, Franco M. La Luna, Kely L. Caiado, Débora O. C. e Silva, Patrícia P. C. Sartoratto and Marilda D. Assis |
| J. Braz. Chem. Soc. 2012, 23, 1411 |
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This work describes the covalent immobilization of an ironporphyrin, 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin iron(III) chloride (FeTFPP), onto maghemite/silica magnetic nanospheres covered with aminofunctionalized silica and its use as catalyst for hydrocarbon and herbicide (simazine) oxidations |
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DOI S0103-50532012005000005 Published online: July 3, 2012 |
Comparison of Different Pre-treatment Procedures for the Determination of
Chromium in Crude Oil Samples by GF AAS |
Helen M. Pessoa, Fernanda H. Lyra, Eustáquio Vinicius R. de Castro, Reinaldo C. de Campos,
Maria Tereza W. D. Carneiro and Geisamanda P. Brandão |
| J. Braz. Chem. Soc. 2012, 23, 1421 |
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| Cr absorption signal obtained by DS-GF AAS of 0.760 mg of crude oil sample without pre-treatement (red - Cr atomic absorption signal; blue - background signal) |
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DOI S0103-50532012005000004 Published online: July 3, 2012 |
PAHs in Cultured Mussels Perna perna from a Southeastern Brazilian Bay |
| Renato V. Yoshimine and Renato S. Carreira |
| J. Braz. Chem. Soc. 2012, 23, 1429 |
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| The occurrence of polycyclic aromatic hydrocarbons (PAHs) in mussels (Perna perna) cultured in farms from the Ilha Grande Bay (Rio de Janeiro State, Brazil) was evaluated for the first time. The levels of PAHs were generally low and below the threshold concentrations recommended for human consumption of shellfish. The results also revealed reasonable good local environmental conditions |
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DOI S0103-50532012005000003 Published online: July 5, 2012 |
Lanthanide Nitrates as Lewis Acids in the One-Pot Synthesis of
1,2,4-Oxadiazole Derivatives |
| Juliana A. Vale, Wagner M. Faustino, Davila de S. Zampieri, Paulo J. S. Moran, José A. R. Rodrigues and Gilberto F. de Sá |
| J. Braz. Chem. Soc. 2012, 23, 1437 |
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| Lanthanide nitrates [Ln(NO3)3] acting as catalyst in direct one-pot synthesis of 3-benzoyl- and 3-acetyl-1,2,4-oxadiazoles derivatives from aromatic ketones with electron-donating (EDG) and electron-withdrawing groups (EWG) |
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DOI S0103-50532012005000002 Published online: July 5, 2012 |
Simultaneous Quantification of Lycopene, β-Carotene, Retinol and α-Tocopherol in Plasma after a Simple Extraction Procedure: Stability Study and Application to Human Volunteer |
Mariele F. Charão, Angela M. Moro, Natália Brucker, Rachel P. Bulcão, Marília Baierle,
Fernando Freitas, Juliano Durgante, Sabrina Nascimento, Guilherme B. Bubols,
Paulo H. Saldiva, Denise Bohrer and Solange C. Garcia |
| J. Braz. Chem. Soc. 2012, 23, 1441 |
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| The described method consists of a rapid and simple liquid-liquid extraction procedure and posterior quantification by high-performance liquid chromatography (HPLC) with Vis/fluorescence detection. It was shown to be a sensitive method for the simultaneous determination of lycopene, β-carotene, retinol and α-tocopherol in human plasma and can be utilized in routines of clinical laboratories |
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DOI S0103-50532012005000001 Published online: July 10, 2012 |
Kinetic Analytical Method for Determination of Uric Acid in Human Urine using
Analyte Pulse Perturbation Technique |
| Natasa D. Pejic, Jelena P. Maksimovic, Slavica M. Blagojevic, Slobodan R. Anic, Zeljko D. Cupic and Ljiljana Z. Kolar-Anic |
| J. Braz. Chem. Soc. 2012, 23, 1450 |
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| The kinetic methods based on the potentiometric monitoring of the concentration perturbations of the both the Bray-Liebhafsky oscillatory reaction in a stable non-equilibrium stationary state and Dushman reaction in a steady state, are described. The methods are utilized for determination of uric acid in human urine samples |
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DOI S0103-50532012005000006 Published online: July 12, 2012 |
Optimization of an Analytical Protocol for the Extraction, Fractionation and
Determination of Aromatic and Aliphatic Hydrocarbons in Sediments |
| Vânia R. Ferreira, Cindy D. Gouveia, Cesar A. da Silva, Andreia N. Fernandes and Marco T. Grassi |
| J. Braz. Chem. Soc. 2012, 23, 1460 |
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| PAH concentrations recovered from certified reference sediment (NWRI EC-3). Vertical bars represent the standard deviation (n = 3) for the recovered and for the certified values (n = 3) |
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DOI S0103-505320120050000010 Published online: July 12, 2012 |
Spectrophotometric Evaluation of the Behavior of Disperse Red 1 Dye in Aqueous
Media and its Interaction with Calf Thymus ds-DNA |
| Carolina V. Uliana, Gustavo S. Garbellini and Hideko Yamanaka |
| J. Braz. Chem. Soc. 2012, 23, 1469 |
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Studies of the solubility of the model dye disperse red 1 (DR1) in aqueous solutions, its determination in water samples and the interaction of the dye with calf thymus ds-DNA were performed using UV-Vis spectrophotometry |
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DOI S0103-50532012005000009 Published online: July 12, 2012 |
Currently Used Pesticides in Water Matrices in Central-Western Brazil |
| Elisângela N. Nogueira, Eliana F. G. C. Dores, Alício A. Pinto, Ricardo S. S. Amorim, Maria L. Ribeiro and Carolina Lourencetti |
| J. Braz. Chem. Soc. 2012, 23, 1476. |
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| Currently used pesticides in water matrices in Central-Western Brazil reveal a higher diversity of compounds and frequency of detection in rain water than in surface and groundwater samples and point to the risk of pesticide contamination in important headwater streams in the study areas |
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DOI S0103-50532012005000008 Published online: July 12, 2012 |
Anionic Chromogenic Chemosensors Highly Selective for Fluoride or Cyanide Based on 4-(4-Nitrobenzylideneamine)phenol |
| Celso R. Nicoleti, Vanderléia G. Marini, Lizandra M. Zimmermann and Vanderlei G. Machado |
| J. Braz. Chem. Soc. 2012, 23, 1488 |
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| 4-(4-Nitrobenzylideneamine)phenol is used in the study of anionic chromogenic chemosensors in acetonitrile allowing the highly selective detection of F- and CN-. These chemosensors are based on acid-base and on indicator displacement strategies |
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DOI S0103-50532012005000007 Published online: July 12, 2012 |
Comparison of the n-Alkanes and Polycyclic Aromatic Hydrocarbons Concentrations in the Atmosphere during the Preparation of Warm and Hot Mixtures Asphalt for Pavements |
| Rosângela Motta, Pérola C. Vasconcellos, Liedi Bernucci, Simone G. Ávila and Talita Cornetti |
| J. Braz. Chem. Soc. 2012, 23, 1501 |
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Warm mix asphalt (WMA) is a new paving technology produced with temperature around
30 °C lower than conventional hot mix asphalt (HMA). Due to the reduction of temperature, less n-alkanes and polycyclic aromatic hydrocarbons (PAH) are generated during the production of WMA than HMA |
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DOI S0103-505320120050000011 Published online: July 19, 2012 |
Quantitative Chemical Profile and Multivariate Statistical Analysis of Alembic Distilled Sugarcane Spirit Fractions |
Felipe A. T. Serafim, Carlos A. Galinaro, Alexandre A. da Silva, Silmara F. Buchviser,
Eduardo S. P. do Nascimento, Fernando V. Novaes and Douglas W. Franco |
| J. Braz. Chem. Soc. 2012, 23, 1506 |
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| During the alembic distillation process, the sugarcane spirit is separated into three different fractions which presented differences among their quantitative chemical profile. In this work was suggested a quantitative chemical model for it in order to support the standardization of this production step |
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DOI S0103-505320120050000015 Published online: July 19, 2012 |
A LED Based Photometer for Solid Phase Photometry: Zinc Determination in
Pharmaceutical Preparation Employing a Multicommuted Flow Analysis Approach |
| Tuanne R. Dias and Boaventura F. Reis |
| J. Braz. Chem. Soc. 2012, 23, 1515 |
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| A LED (light emitting diode) based photometer for solid phase photometry coupled to a multi-commuted flow analysis approach forming a downsized setup that is designed for zinc determination in pharmaceutical products |
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PDOI S0103-505320120050000014 Published online: July 19, 2012 |
Synthesis, Electrochemical, Spectrophotometric and Potentiometric Studies of
Two Azo-Compounds Derived from 4-Amino-2-Methylquinoline in Ethanolic-Aqueous Buffered Solutions |
| Mona A. El-Attar, Iqbal M. Ismail and Mohamed M. Ghoneim |
| J. Braz. Chem. Soc. 2012, 23, 1523 |
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| Two azo-compounds derived from 4-amino-2-methylquinoline were synthesized and characterized. Their electrode reaction pathways were elucidated and discussed. Dissociation and stability constants of the examined azo-derivatives and stoichiometry of their complexes with some transition metal ions were determined |
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DOI S0103-505320120050000013 Published online: July 31, 2012 |
A Peroxotungstate-Ionic Liquid Brush Assembly: an Efficient and Reusable Catalyst for Selectively Oxidizing Sulfides with Aqueous H2O2 Solution in Neat Water |
| Xianying Shi, Wenjuan Ma, Hui Ou, Xiaoyan Han, Congmin Lu, Yan Chen and Junfa Wei |
| J. Braz. Chem. Soc. 2012, 23, 1536 |
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| An environmentally-friendly procedure was developed for selective oxidation of sulfides at room temperature using 30 wt.% hydrogen peroxide as terminal oxidant and water as sole solvent. The catalyst is easily recovered post-reaction (via simple filtration) and reused at least eight times without a noticeable loss of activity |
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DOI S0103-505320120050000012 Published online: July 31, 2012 |
Kinetics and Mechanism of Chlorate-Chloride Reaction |
Rafaela T. P. Sant'Anna, Cristina M. P. Santos, Guilherme P. Silva, Ricardo J. R. Ferreira,
André P. Oliveira, Carlos E. S. Côrtes and Roberto B. Faria |
| J. Braz. Chem. Soc. 2012, 23, 1543 |
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| A saturation profile for chloride concentration was found in a kinetic study for the chlorate-chloride reaction, suggesting the formation of Cl2O32- intermediate. The proposed mechanism was able to reproduce the experimental behavior |
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DOI S0103-505320120050000017 Published online: July 31, 2012 |
Evaluation of Herbicidal Potential of Depsides from Cladosporium uredinicola,
an Endophytic Fungus Found in Guava Fruit |
Lívia S. de Medeiros, Olívia M. Sampaio, Maria Fátima das G. F. da Silva, Edson Rodrigues Filho
and Thiago André M. Veiga |
| J. Braz. Chem. Soc. 2012, 23, 1551 |
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| Two natural depsides, 2,4-dihydroxy-3,6-dimethylbenzoate (1) and 3-hydroxy-2,5-dimethylphenyl 4-[(2,4-dihydroxy-3,6-dimethylbenzoyl)oxy]-2-hydroxy-3,6-dimethylbenzoate (2), were isolated from Cladosporium uredinicola and their effects on various steps of photosynthesis were investigated |
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DOI S0103-505320120050000018 Published online: August 2, 2012 |
Cytotoxic Cordiaquinones from the Roots of Cordia polycephala |
| Hozana Patrícia S. Freitas, Ana Isabel V. Maia, Edilberto R. Silveira, José Delano B. Marinho Filho, Manoel O. Moraes, Cláudia Pessoa, Letícia V. Costa Lotufo and Otília Deusdênia L. Pessoa |
| J. Braz. Chem. Soc. 2012, 23, 1558 |
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| The chemical investigation of the roots of Cordia polycephala resulted in the isolation of two new terpenoid naphtoquinones, named as cordiaquinones N and O. Both compounds showed cytotoxic effects with IC50 values in the range of 1.2 to 3.4 µmol L-1 |
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DOI S0103-505320120050000019 Published online: August 7, 2012 |
Photocatalytic Degradation of Camphor by Suspended and Immobilized Photocatalysts |
| Carla Sirtori, Adriane M. de Freitas, Sérgio Toshio Fujiwara and Patricio Peralta-Zamora |
| J. Braz. Chem. Soc. 2012, 23, 1563 |
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| Immobilized forms of TiO2 permit almost total photocatalytic degradation of camphor in aqueous solution, including high mineralization degrees |
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DOI S0103-505320120050000020 Published online: August 7, 2012 |
A Quantitative Method using Near Infrared Imaging Spectroscopy for Determination of Surface Composition of Tablet Dosage Forms: an Example of Spirolactone Tablets |
| Renato L. Carneiro and Ronei J. Poppi |
| J. Braz. Chem. Soc. 2012, 23, 1570 |
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| The homogeneity of the components of a tablet was investigated using near infrared (NIR) imaging spectroscopy. Left side of the graphical abstract presents the chemometric technique used to find concentration maps of excipients and active pharmaceutical ingredient. Right side of the figure shows a tablet and the distribution of compounds in the tablet surface |
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DOI S0103-505320120050000022 Published online: August 9, 2012 |
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