30/6/2011
Saiu o JBCS número 7 - Volume 22
O JBCS acaba de lançar online seu sétimo número de 2011 (vol. 22-7, correspondente a Julho). A impressão e, portanto, distribuição da revista aos assinantes ocorrerá em breve.
Neste novo número, ilustrando nosso novo design de capa, temos o account Carbocations on Zeolites. Quo Vadis? dos autores Claudio J. A. Mota and Nilton Rosenbach Jr. O texto editorial de autoria de Bradley D. Miller (Sociedade Americana de Química) trata da "A Prática Transnacional da Química: Competências Fundamentais e Efeitos sobre as Carreiras e a Produtividade Científica". Ao todo, o JBCS vol. 22, No. 7 apresenta 217 páginas impressas, contendo 25 Artigos.
Assinem, e divulguem o JBCS. Façam um link de nossa página http://jbcs.sbq.org.br em sua instituição, laboratório ou empresa já que o acesso é aberto. Incentivem a leitura, pesquisa e citação ao JBCS.
Fonte: Elizabeth Magalhaes (JBCS)
Table of Contents with Graphical Abstracts
>> Editorial (189 KB)
The Transnational Practice of Chemistry: Key Competencies and Effects on Career and Scientific Productivity
Bradley D. Miller |
| J. Braz. Chem. Soc. 2011, 22, 1193. |
Carbocations on Zeolites. Quo Vadis? |
| Claudio J. A. Mota and Nilton Rosenbach Jr. |
| J. Braz. Chem. Soc. 2011, 22, 1197. |
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| The image shows the calculated structure of the bicyclobutonium cation on the zeolite Y structure, highlighting the hydrogen bond interactions with the framework oxygen atoms. |
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Web Release date: May 5, 2011. |
Cracking and Hydrocracking of Triglycerides for Renewable Liquid Fuels: Alternative Processes to Transesterification |
Roger Frety, Maria da Graça C. da Rocha, Soraia T. Brandão, Luiz A. M. Pontes, Jose F. Padilha,
Luiz E. P. Borges and Wilma A. Gonzalez |
| J. Braz. Chem. Soc. 2011, 22, 1206. |
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| Liquid products from hydrocracking of babassu oil with NiMo/alumina catalyst, as analyzed by gas chromatography, showed a highly selective transformation of fatty acid moieties present in the original oil to a mixture of saturated linear hydrocarbons. The presence of both even and uneven C number in the products implies that two reaction mechanisms occurred: deoxygenation without C-C bond breaking and decarboxylation/decarbonylation. |
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Web Release date: April 28, 2011. |
Enantioselective Analysis of Fluoxetine and Norfluoxetine in Plasma Samples by Protein Precipitation and Liquid Chromatography with Fluorescence Detection |
| Jordana S. Bueno, Bruno J.G. Silva and Maria Eugênia C. Queiroz |
| J. Braz. Chem. Soc. 2011, 22, 1221. |
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| Chromatogram of blank plasma sample spiked with fluoxetine (FLX) and norfluoxetine (NFLX), resulting in 500 ng mL-1, after protein precipitation step and liquid chromatography-fluorescence detection analysis. |
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Web Release date: February 24, 2011. |
Determination of Biodiesel Adulteration with Raw Vegetable Oil from ATR-FTIR Data using Chemometric Tools |
Itânia P. Soares, Thais F. Rezende, Rita de Cássia. C. Pereira, Cláudio G. dos Santos and
Isabel C. P. Fortes |
| J. Braz. Chem. Soc. 2011, 22, 1229. |
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| A three-dimensional plot of the first three principal components from biodiesel data. It is possible to distinguish, in each model, three different groups of samples: cotton, castor and palm biodiesel. |
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Web Release date: February 24, 2011. |
Zr(HSO4)4 as an Efficient Catalyst for the Preparation of 10-Aryl-6,8-dimethyl-6,10-dihydro-5-oxa-6,8-diazaanthra[2,3-d][1,3]dioxole-7,9-diones under Solvent-Free Conditions |
| Jiangli Zhang, Wei Lin Li and Li Qiang Wu |
| J. Braz. Chem. Soc. 2011, 22, 1236. |
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| A one-pot three-component condensation of 3,4-methylenedioxyphenol, aromatic aldehydes and 1,3-dimethylbarbituric acid, efficiently promoted in the presence of Zr(HSO4)4 under solvent-free conditions, produced 10-aryl-6,8-dimethyl-6,10-dihydro-5-oxa-6,8-diazaanthra[2,3-d][1,3]dioxole-7,9-diones. |
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Web Release date: February 24, 2011. |
Detection of DNA Nucleotides on Pretreated Boron Doped Diamond Electrodes |
| Gustavo S. Garbellini, Carolina V. Uliana and Hideko Yamanaka |
| J. Braz. Chem. Soc. 2011, 22, 1241. |
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| The article presents the individual and equimolar mixture of DNA nucleotide detection using square wave voltammetry on boron doped diamond electrodes cathodically and anodically pre-treated. |
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Web Release date: March 1, 2011. |
Determination of Etimicin in Rat Plasma using 9-Fluorenylmethyl Chloroformate Precolumn Derivatization by HPLC with Fluorescence Detection |
| Xiaojuan Chang and Zhengping Yu |
| J. Braz. Chem. Soc. 2011, 22, 1246. |
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| The reaction of amines with FMOC-Cl. Etimicin uses precolumn derivatization (PCD) with 9-fluor-enylmethyl chloroformate (FMOCCl) by a reversed phase separation and subsequent fluorescence detection. |
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Web Release date: March 1, 2011. |
Stability-Indicating HPLC Determination of Pramipexole dihydrochloride in Bulk Drug and Pharmaceutical Dosage Form |
Vedavati M. Panditrao, Aniket P. Sarkate, Jaiprakash N. Sangshetti, Pravin S. Wakte and
Devanand B. Shinde |
| J. Braz. Chem. Soc. 2011, 22, 1253. |
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| The reversed phase HPLC method was developed and validated for Pramipexole dihydrochloride in bulk drugs and in pharmaceutical dosage form in the presence of degradation products. The detection was carried out at a wavelength of 260 nm. The Pramipexole was subjected to stress conditions of hydrolysis, oxidation, photolysis and thermal degradation |
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Web Release date: March 1, 2011. |
Allylic Chlorination of Terpenic Olefins using a Combination of MoCl5 and NaOCl |
| Brahim Boualy, Larbi El Firdoussi, Mustapha Ait Ali and Abdellah Karim |
| J. Braz. Chem. Soc. 2011, 22, 1259. |
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Various natural terpenes are converted to the corresponding allylic chlorides in good to excellent yield, using MoCl5 /NaOCl system under mild conditions. |
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Web Release date: March 1, 2011. |
Optimization of a New Dissolution Test for Oxcarbazepine Capsules Using Mixed-Level Factorial Design |
| Hudson C. Polonini, Marcone A. L. de Oliveira, Anderson O. Ferreira, Nádia R. B. Raposo, Lívia N. Grossi and Marcos A. F. Brandão |
| J. Braz. Chem. Soc. 2011, 22, 1263. |
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| The dissolution of the oxcarbazepine was carried out utilizing a dissolutor and different parameters in 18 experiments which lead to the plotting of a surface response graph. This allowed establishing the best conditions for the test. |
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Web Release date: March 3, 2011. |
Adsorptive Stripping Voltammetric Determination of Nitroimidazole Derivative on Multiwalled Carbon Nanotube Modified Electrodes: Influence of Size and Functionalization of Nanotubes |
| Paola Jara-Ulloa, Paulina Cañete-Rosales, Luis J. Núñez-Vergara and Juan A. Squella |
| J. Braz. Chem. Soc. 2011, 22, 1271. |
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| 4-NimMeBr was adsorbed on the MWCNT modified electrode thus permitting the implementation of an adsorptive stripping voltammetric (ASV) method. |
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Web Release date: March 3, 2011. |
Metabolites from Roots of Colubrina greggii var. yucatanensis and Evaluation of their Antiprotozoan, Cytotoxic and Antiproliferative Activities |
| Dafne B. Domínguez-Carmona, Fabiola Escalante-Erosa, Karlina García-Sosa, Grace Ruiz-Pinell, David Gutierrez-Yapu, Manuel J. Chan-Bacab, Rosa E. Moo-Puc, Nigel C. Veitch, Alberto Giménez-Turba and Luis M. Peña-Rodríguez |
| J. Braz. Chem. Soc. 2011, 22, 1279. |
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| 3-O-acetyl ceanothic acid, a new natural ceanothane triterpene together with the known metabolites ceanothic acid, ceanothenic acid, betulinic acid, discarine B and chrysophanein, were isolated from the root extract of C. greggii var. yucatanensis and evaluated for their antiprotozoan, cytotoxic and anti-proliferative activities. |
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Web Release date: March 11, 2011. |
Synthesis and Biological Activity of Some New Pyrazoline and Pyrimidine Derivatives |
| Seham Y. Hassan |
| J. Braz. Chem. Soc. 2011, 22, 1286. |
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| New series of anthracenylpyrazolines and anthracenylpyrimidines were synthesized from 3-(anthracen-9-yl)-1-aryl-prop-2-en-1-one derivatives and spectroscopically characterized. The compounds were evaluated for their antibacterial and antifungal activities. |
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Web Release date: March 11, 2011. |
Electrochemical Degradation of the Dye Reactive Orange 16 using Electrochemical Flow-Cell |
| Luciano Gomes, Douglas W. Miwa, Geoffroy R. P. Malpass and Artur J. Motheo |
| J. Braz. Chem. Soc. 2011, 22, 1299. |
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| Electrochemical filter-press-type reactor used for dye removal. |
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Web Release date: March 15, 2011. |
Evolution of the Concentration of Phenolic Compounds in Cachaça during Aging in an Oak (Quercus sp.) Barrel |
| Jeancarlo P. dos Anjos, Maria das Graças Cardoso, Adelir A. Saczk, Haroldo S. Dórea, Wilder D. Santiago, Ana Maria R. Machado, Lidiany M. Zacaroni and David Lee Nelson |
| J. Braz. Chem. Soc. 2011, 22, 1307. |
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| Evolution of the phenolic content of the cachaça during aging in oak barrel, where the phenolic compounds were analised by HPLC and spectrophotometric analysis. |
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Web Release date: March 17, 2011. |
Highly Selective and Sensitive Voltammetric Sensor for Captopril Determination Based on Modified Multiwall Carbon Nanotubes Paste Electrode |
| Ali A. Ensafi, B. Rezaei, Zohre Mirahmadi-Zare and H. Karimi-Maleh |
| J. Braz. Chem. Soc. 2011, 22, 1315. |
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| A modified electrode (by incorporation of carbon nanotubes with p-aminophenol as a mediator) was used as voltammetric sensor for the determination of captopril. The modified electrode has high electrocatalytic activity for captopril oxidation at pH 6.0. The voltammetric sensor was successfully applied for the determination of captopril in drug and urine samples. |
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Web Release date: March 17, 2011. |
H6GeMo10V2O40¥16H2O Nanoparticles Prepared by Hydrothermal Method: A New and Reusable Heteropoly Acid Catalyst for Highly Efficient Acetylation of Alcohols and Phenols under Solvent-Free Conditions |
| Saeid Farhadi, Reza Zareisahamieh and Masoumeh Zaidi |
| J. Braz. Chem. Soc. 2011, 22, 1323. |
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| H6GeMo10V2O40¥16H2O nanoparticles, as a new heteropoly acid, have been prepared through hydrothermal method and have been used as an efficient heterogeneous catalyst for rapid and selective acetylation of alcohols and phenols with acetic anhydride under solvent-free conditions at room temperature. |
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Web Release date: March 22, 2011. |
Biotransformation of Chalcones by the Endophytic Fungus Aspergillus flavusIsolated from Paspalum maritimum Trin. |
| Marivaldo J. C. Corrêa, Fátima M. Nunes, Heriberto R. Bitencourt, Fábio C. Borges, Giselle M. S. P. Guilhon, Mara S. P. Arruda, Andrey M. R. Marinho, Alberdan S. Santos, Cláudio N. Alves, Davi S. B. Brasil and Lourivaldo S. Santos |
| J. Braz. Chem. Soc. 2011, 22, 1333. |
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| The chalcones were incubated in culture medium to produce the corresponding dihydrochalcones. The bioreduction was regioselective, occurring only in the carbon-carbon double bond of the α, β-insaturated ketone system. |
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Web Release date: March 22, 2011. |
Spectroscopic Characterization of the Exopolysaccharide of Xanthomonas axonopodis pv. citri in Cu2+ Resistance Mechanism |
| Denise Osiro, Roberto W. Assis Franco and Luiz Alberto Colnago |
| J. Braz. Chem. Soc. 2011, 22, 1339. |
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| FTIR spectra of Xac cells cultivated with (red) and without CuSO4 (black). The strong peak (red) at 1650 cm-1 in related to the production of pyruvated exopolysaccharides, by the cells, to bind and reduces the copper toxicity. |
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Web Release date: March 22, 2011. |
Prenylindole Alkaloids from Raputia praetermissa (Rutaceae) and their Chemosystematic Significance |
Lisandra V. Rosas, Thiago André M. Veiga, João B. Fernandes, Paulo C. Vieira and
M. Fátima das G. F. da Silva |
| J. Braz. Chem. Soc. 2011, 22, 1346. |
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| The occurrence of prenylindole alkaloids in Raputia species provides a better understanding of the chemotaxonomic relationships between Raputia and Neoraputiagenera. |
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Web Release date: March 24, 2011. |
HPLC-FLD Simultaneous Determination of 13 Polycyclic Aromatic Hydrocarbons: Validation of an Analytical Procedure for Soybean Oils |
| Mônica C. R. Camargo, Paula R. Antoniolli and Eduardo Vicente |
| J. Braz. Chem. Soc. 2011, 22, 1354. |
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| Polycyclic aromatic hydrocarbons (PAHs) are organic contaminants, which occur in air, soil and food, from incomplete combustion or pyrolysis of organic matter. In edible oils, the presence of PAHs is mainly attributed to the smoke drying of the oil seeds, during oil production. |
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Web Release date: March 24, 2011. |
Electrochemical Behavior of Copper in Drinking Water: Evaluation of Dissolution Process at Low Anodic Overpotential |
| J. F. Rios, J. A. Calderón and R. P. Nogueira |
| J. Braz. Chem. Soc. 2011, 22, 1362. |
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| The copper surface immersed in near-neutral aerated tap water shows an increasing film thickness with time that hinders the diffusion of copper species across the oxide layer, which is larger in stagnating condition. |
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Web Release date: March 24, 2011. |
Solid-Phase Microextraction for Determination of Anilino-Pyrimidine, Dimethyl-carbamate and Thiadiazine Pesticides in Irrigation Project Surface Water |
| Clóvis F. S. Filho, Elissandro S. Emídio and Haroldo S. Dórea |
| J. Braz. Chem. Soc. 2011, 22, 1371. |
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| Pyrimethanil, pirimicarb and buprofezin are pesticides used in a variety of cultures and this work showed which one can be determinated in surface waters from irrigated area. The samples were collected from the irrigated regions of Sergipe and Pernambuco States, Brazil, and were prepared by solid-phase microextraction (SPME). |
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Web Release date: March 29, 2011. |
Synthesis of Dihydropyrimidin-2-one/thione Library and Cytotoxic Activity against the Human U138-MG and Rat C6 Glioma Cell Lines |
Rômulo F. S. Canto, Andressa Bernardi, Ana Maria O. Battastini, Dennis Russowsky and
Vera Lucia Eifler-Lima |
| J. Braz. Chem. Soc. 2011, 22, 1379. |
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| A series of dihydropyrimidin-2-ones/thiones synthesized by a new environmentally-friend method showed, for the first time, antiproliferative activity against human U118-MG and rat C6 glioma cell lines. Some compounds were more cytotoxic than monastrol. |
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Web Release date: March 15, 2011. |
Pd-Catalyzed Heck Reactions of Aryl Bromides with 1,2-Diarylethenes |
| Jones Limberger, Silvia Poersch and Adriano L. Monteiro |
| J. Braz. Chem. Soc. 2011, 22, 1389. |
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| The Heck reaction of trans-stilbene derivatives with aryl halides in order to obtain substituted triarylethenes is described. Findings concerning the influence of halide or olefin electro-donating and withdrawing groups on activity, regio- and stereoselectivity of the Heck reaction are also reported. |
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Web Release date: March 29, 2011. |
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