21/4/2011
Saiu o JBCS número 5 - Volume 22
O JBCS acaba de lançar online seu quinto número de 2011 (vol. 22-5, correspondente a Maio). A impressão e, portanto distribuição da revista aos assinantes ocorrerá em breve.
Neste novo número, ilustrando nosso novo design de capa, temos o artigo Slow Relaxation of the Magnetization in Oximato-Bridged Heterobimetallic Copper(II)-Manganese(III) Chains dos autores Rafael Ruiz, Isabel Castro, Emilio Pardo, JesÏs Ferrando-Soria, Joan Cano, Francesc Lloret and Miguel Julve (Espanha). O texto editorial de autoria do Professor Osvaldo Antonio Serra (Departamento de Química - FFCLRP-USP) intitula-se "Terras Raras - Brasil vs. China". Ao todo, o JBCS vol. 22, No. 5 apresenta 202 páginas impressas, contendo 22 Artigos e 3 Short Reports.
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(196 KB)
Rare Earths – Brazil x China
Osvaldo Antonio Serra |
| J. Braz. Chem. Soc. 2011, 22, 809. |
A Multicommuted Flow System for Dissolution Studies of Captopril in Pharmaceutical Preparations |
| Mariana A. Sanchez, Diogo L. Rocha, Wanessa R. Melchert and Fábio R. P. Rocha |
| J. Braz. Chem. Soc. 2011, 22, 813. |
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| Apparatus for dissolution assays of pharmaceutical preparations exploiting a flow-system with multi-commutation. The output of the detection system shows the transient signals and the corresponding dissolution curves. |
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Web Release date: January 27, 2011. |
Sequential Voltammetric Determination of Chromium, Thallium, Cadmium, Lead, Copper and Antimony in Saline Hemodialysis Concentrates using Electrolyte pH Gradient |
Paulo C. Nascimento, Alexandre B. Schneider, Denise Bohrer, Leandro M. de Carvalho and
Cristiane L. Jost |
| J. Braz. Chem. Soc. 2011, 22, 820. |
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| Potential and pH procedure for the sequential voltammetric determination of metallic traces in saline hemodialysis concentrates. Chromium was quantified by adsorptive cathodic stripping voltammetry. Anodic stripping voltammetry was used for Tl, Cd, Pb, Cu and Sb quantification. |
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Web Release date: January 27, 2011. |
Metal Fractionation in Sediments of the Sergipe River, Northeast, Brazil |
Elisangela de Andrade Passos, Jose do Patrocínio H. Alves, Carlos Alexandre B. Garcia and
Antonio C. Spinola Costa |
| J. Braz. Chem. Soc. 2011, 22, 828. |
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| This study presents the distributions of Cd, Cr, Cu, Ni, Pb and Zn in sediments of the Sergipe River. All of the sediment samples presented evidence of anthropogenic enrichment and around 30% of the metal content was present in the inert fraction. |
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Web Release date: January 27, 2011. |
Citalopram Hydrobromide: Degradation Product Characterization and a Validated Stability-Indicating LC-UV Method |
Manav Sharma, Parikshit R. Jawa, Ravinder S. Gill and Gulshan Bansal |
| J. Braz. Chem. Soc. 2011, 22, 836. |
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| A forced degradation study on citalopram hydrobromide has revealed five degradation products. One photolytic and two hydrolytic products are characterized through LC-MS studies. A SIAM is developed and validated for quantitative analysis of citalopram. |
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Web Release date: January 27, 2011. |
Synthesis, Antimicrobial and Cytotoxicity Studies of Some Novel Modified Strobilurin Derivatives |
Ajjanna M. Sridhara, Kallam R. Venugopala Reddy, Jathi Keshavayya, Dasannana Malige S. Ambika, Vadiraj S. Gopinath, Prosenjit Bose, Sanath Kumar Goud and Sanenahalli K. Peethambar |
| J. Braz. Chem. Soc. 2011, 22, 849. |
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| Synthesis of 3-isoxazoline substituted phthalazine-methoxyacrylate derivatives. |
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Web Release date: February 1, 2011. |
Protolytic Properties of Dyes Embedded in Gelatin Films |
Nataliya A. Nikitina, Elena A. Reshetnyak, Nataliya V. Svetlova and Nikolay O. Mchedlov-Petrossyan |
| J. Braz. Chem. Soc. 2011, 22, 857. |
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| The acid-base indicator dyes were embedded into the gelatin films by extracting from aqueous media under appropriate conditions. The well-reproducible indices of the apparent ionization constants, pKaapp, of the indicators were calculated by conventional equating the pH values of the bulk aqueous buffer and those of the internal water into the gelatin films. |
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Web Release date: February 1, 2011. |
Ethambutol Analysis by Copper Complexation in Pharmaceutical Formulations: Spectrophotometry and Crystal Structure |
Adriana F. Faria, Luiza F. Marcellos, Juliana P. Vasconcelos, Marcus V. N. de Souza,
Antônio L. S. Júnior, Weberton R. do Carmo, Renata Diniz and Marcone A. L. de Oliveira |
| J. Braz. Chem. Soc. 2011, 22, 867. |
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| UV-Vis spectra of eleven experiments performed through a full 32 experimental design for CuETB complexation study. |
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Web Release date: February 1, 2011. |
Electrooxidation of Phenol on a Ti/RuO2 Anode: Effect of Some Electrolysis Parameters |
Iranildes D. dos Santos, Júlio C. Afonso and Achilles J. B. Dutra |
| J. Braz. Chem. Soc. 2011, 22, 875. |
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| The electrolytic plug flow reactor was used: (i) to demonstrate that NaCl is a better supporting electrolyte than Na2SO4; (ii) to determine the effect of NaCl concentration on phenol removal; (iii) to determine the influence of electrolysis time on COD removal. |
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Web Release date: February 1, 2011. |
Studying the Distribution of Selenium in Buffalo and Cow's Milk Whey |
João B. Pereira Junior and Kelly G. Fernandes |
| J. Braz. Chem. Soc. 2011, 22, 884. |
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| This figure shows the steps of the analytical procedure. |
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Web Release date: February 1, 2011. |
Deltamethrin and Permethrin in the Liver and Heart of Wistar Rats Submitted to Oral Subchronic Exposure |
Mônica A. T. Santos, Marili V. N. Rodrigues, Miguel A. Áreas and Felix G. R. Reyes |
| J. Braz. Chem. Soc. 2011, 22, 891. |
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| This study determined the residual levels of permethrin and deltamethrin in the liver and heart tissues of Wistar rats submitted to sub-chronic oral exposure with pyrethroids, as well as the effect of ingesting fibers on the residual levels of the pyrethroids by using GC-ECD analysis. |
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Web Release date: February 1, 2011. |
Square Wave Voltammetric Determination of Dexamethasone on a Multiwalled Carbon Nanotube Modified Pencil Electrode |
B. Rezaei, S. Z. Mirahmadi Zare and Ali A. Ensafi |
| J. Braz. Chem. Soc. 2011, 22, 897. |
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| Dexamethasone as steroid hormone do not have electrooxidation on pencil graphite electrode but with using of multiwalled carbon nanotubes it shows the electrooxidation behavior. |
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Web Release date: February 3, 2011. |
One-Pot Synthesis of 4H -Chromene and Dihydropyrano[3,2-c]chromene Derivatives in Hydroalcoholic Media |
Ramin Ghorbani-Vaghei, Zahra Toghraei-Semiromi and Rahman Karimi-Nami |
| J. Braz. Chem. Soc. 2011, 22, 905. |
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| Poly(N,N'-dibromo-N-ethyl-benzene- 1,3-disulfonamide) [PBBS] and N,N,N',N'-tetrabromo-benzene-1,3-disulfonamide [TBBDA ] are reusable and efficient catalysts for the synthesis of 4H-chromenes and dihydropyrano[3,2-c]chromenes. |
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Web Release date: February 3, 2011. |
Arsenic and Mercury Mobility in Brazilian Sediments from the São Francisco
River Basin |
Patrícia S. Rezende, Priscila A. S. Moura, Walter A. Durão Jr., Clésia C. Nascentes,
Cláudia C. Windmöller and Letícia M. Costa |
| J. Braz. Chem. Soc. 2011, 22, 910. |
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| Arsenic and mercury determinations were realized in 28 sediment samples from the São Francisco River Basin, Minas Gerais. The elements were analysed by hydride generator atomic absorption spectrometry (HG AAS). Adictionally, mercury determination was realized in the solid samples by direct mercury analyzer (DMA). |
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Web Release date: February 3, 2011. |
Monitoring of β-Blockers Ozone Degradation via Electrospray Ionization Mass Spectrometry |
Cristina Quispe, Fabiane M. Nachtigall, Maria Francesca R. Fonseca, Rosana M. Alberici,
Luis Astudillo, Jorge Villaseñor, Marcos N. Eberlin and Leonardo S. Santos |
| J. Braz. Chem. Soc. 2011, 22, 919. |
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| Online ESI-MS monitoring provided detailed information about organic intermediates connecting parent molecules and final mineralization products during advanced oxidation processes of Nadolol, Atenolol and Acebutolol. |
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Web Release date: February 3, 2011. |
Antioxidant Activity and Composition of Propolis Obtained by Different Methods of Extraction |
Solange M. Cottica, Alexandra C. H. F. Sawaya, Marcos N. Eberlin, Selma L. Franco, Lucia M. Zeoula and Jesuí V. Visentainer |
| J. Braz. Chem. Soc. 2011, 22, 929. |
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| Correlation coefficients between the DPPH· and FRAP methods, and contents of phenolic compounds and flavonoids of propolis ethanolic extracts obtained with different concentrations of propolis and ethanol contents. |
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Web Release date: February 3, 2011. |
Activity of the Lupane Isolated from Combretum leprosum against Leishmania amazonensis Promastigotes |
Carolina B. G. Teles, Leandro S. Moreira, Alexandre de A. E. Silva, Valdir A. Facundo,
Juliana P. Zuliani, Rodrigo G. Stábeli and Izaltina Silva-Jardim |
| J. Braz. Chem. Soc. 2011, 22, 936. |
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| Structure of a natural triterpene, 3β,6β,16β-triidroxilup-20(29)-eno, isolated from Combretum leprosum fruits which has leishmanicidal activity against Leishmania amazonensis promastigotes. |
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Web Release date: February 8, 2011. |
Chemical Constituents from Branches of Maytenus gonoclada (Celastraceae) and Evaluation of Antimicrobial Activity |
Fernando C. Silva, Lucienir P. Duarte, Grácia D. F. Silva, Sidney A. V. Filho, Ivana S. Lula,
Jacqueline A. Takahashi and William S. T. Sallum |
| J. Braz. Chem. Soc. 2011, 22, 943. |
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Complete 1D/2D NMR data are presented for 3-oxo-12α,29-dihydroxyfriedelane and 3,16-dioxo-dihydroxyfriedelane isolated from branches hexane extract of M. gonoclada. The antimicrobian activity of some constituents are also reported. |
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Web Release date: February 8, 2011. |
Theoretical Determination of the Properties of Methanesulfinic and Methanesulfonic Acids |
Nathália F. Carvalho, Simão P. Silva and Stella M. Resende |
| J. Braz. Chem. Soc. 2011, 22, 950. |
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| Graphical representations of methanesulfonic acid and the two conformers of methanesulfinic acid, whose spectroscopic and thermochemical properties were obtained from high level ab initio calculations. |
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Web Release date: February 8, 2011. |
Chemotaxonomic Significance of Volatile Constituents in Hypenia (Mart. ex Benth.) R. Harley (Lamiaceae) |
Julierme G. Silva, Maria T. Faria, Érica R. Oliveira, Maria H. Rezende, Dalva G. Ribeiro,
Heleno D. Ferreira, Suzana C. Santos, José C. Seraphin and Pedro H. Ferri |
| J. Braz. Chem. Soc. 2011, 22, 955. |
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| Essential oils and morphological characters from thirteen Hypenia spp. revealed the presence of two taxonomic clusters. |
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Web Release date: February 8, 2011. |
Modified Silica Nanoparticles with an Aminonaphthoquinone |
Gleiciani Q. Silveira, Célia M. Ronconi, Maria D. Vargas, Rosane A. S. San Gil and Alvicler Magalhães |
| J. Braz. Chem. Soc. 2011, 22, 961. |
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| Our work has demonstrated that the reaction of aminopropylsilicalgel NPs with labile 2-methoxy-1,4-naphthoquinones is a good route to silica NPs containing bound amino-naphthoquinones. |
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Web Release date: February 10, 2011. |
A Theoretical Study of the Inversion and Rotation Barriers in Methyl-Substituted Amines |
Júnior Nascimento, Marina Pelegrini, Luiz F. A. Ferrão, Orlando Roberto-Neto and
Francisco B. C. Machado |
| J. Braz. Chem. Soc. 2011, 22, 968. |
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| Potential energy curves along the Internal Reaction Coordinate path for the rotation motion of methylamine, dimethylamine and trimethylamine molecules. |
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Web Release date: February 10, 2011. |
Slow Relaxation of the Magnetization in Oximato-Bridged Heterobimetallic Copper(II)-Manganese(III) Chains |
Rafael Ruiz, Isabel Castro, Emilio Pardo, Jesus Ferrando-Soria, Joan Cano, Francesc Lloret and Miguel Julve |
| J. Braz. Chem. Soc. 2011, 22, 976. |
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| The oximato-bridged copper(II)-manganese(III) chains of formula [MnCu(deg)2(CH3COO)(H2O)2] (1), [MnCu(meg)2(CH3COO)(H2O)2] (2) and [MnCu(dmg)2(CH3COO)(H2O)2] (3) (H2deg = diethylgly-oxime, H2meg = methylethylglyoxime and H2dmg = dimethylglyoxime) exhibit intrachain ferromagnetic coupling and slow relaxation of the magnetisation, behaving as single chain magnets (SCMs). |
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Web Release date: March 1, 2011. |
Validated Method for the Determination of Gemifloxacin in Bulk, Pharmaceutical Formulations and Human Serum by RP-HPLC: In Vitro Applications |
Najma Sultana, M. Saeed Arayne, Sana Shamim, Mahwish Akhtar and Somia Gul |
| J. Braz. Chem. Soc. 2011, 22, 987. |
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| Graphical abstract represents the chromatogram of gemifloxacin (GMFX) at a concentration level of 25 μg mL-1 in mobile phase (a) composed of methanol:water (90:10, v/v) and human serum (b) at 270 nm, obtained by applying the proposed method. |
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Web Release date: February 1, 2011. |
Novel Anthraquinone Derivatives Produced by Pestalotiopsis guepinii, an Endophytic of the Medicinal Plant Virola michelii (Myristicaceae) |
Marilene N. Oliveira, Lourivaldo S. Santos, Giselle M. S. P. Guilhon, Alberdan S. Santos, Isabel C. S. Ferreira, Manoel L. Lopes-Junior, Mara Silvia P. Arruda, Andrey M. R. Marinho, Milton N. da Silva, Edson Rodrigues-Filho and Maria C. F. Oliveira |
| J. Braz. Chem. Soc. 2011, 22, 993. |
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| The endophytic fungus Pestalotiopsis guepinii was grown on rice and produced a new anthraquinone derivative named guepinone. |
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Web Release date: February 8, 2011. |
C-24 Stereochemistry of Marine Sterols: (22E )-24-Ethyl-24-methylcholesta-5,22-dien-3β-ol and 24-Ethyl-24-methylcholest-5-en-3β-ol |
Shizue Echigo, Leonardo Castellanos, Carmenza Duque, Hidehiro Uekusa, Noriyuki Hara and Yoshinori Fujimoto |
| J. Braz. Chem. Soc. 2011, 22, 997. |
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| The C-24 configurations of the two marine sterols were determined by comparing their NMR data with those of stereodefined (24R)- and (24S)-samples that were synthesized in routes involving the orthoester Claisen rearrangement. |
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Web Release date: February 8, 2011. |
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