24/3/2011
Saiu o JBCS número 4 - Volume 22
O JBCS acaba de lançar online seu quarto número de 2011 (vol. 22-4, correspondente a Abril). A impressão e distribuição da revista aos assinantes ocorrerão em breve.
Neste novo número temos, ilustrando nosso novo design de capa, o artigo Synthesis, Characterization and Photovoltaic Properties of Di-Anchoring Organic Dyes dos autores Tzi-Yi Wu, Ming-Hsiu Tsao, Shyh-Gang Su, H. Paul Wang, Yuan-Chung Lin, Fu-Lin Chen, Cheng-Wen Chang and I-Wen Sun (Taiwan). Como texto editorial, Pedro Wongtschowski (Presidente do Grupo ULTRA e Vice-Presidente da ABIQUIM) escreve sobre “A Indústria Química Brasileira – Desafios e Oportunidades”. Ao todo, o JBCS vol. 22, No. 4 apresenta 202 páginas impressas, contendo 1 Review sobre Cromatografia Gasosa Bidimensional Abrangente, 21 Artigos e 3 Short Reports.
Assinem, e divulguem o JBCS. Façam um link de nossa página em sua instituição, laboratório ou empresa já que o acesso é aberto. Incentivem a leitura, pesquisa e citação ao JBCS.
Table of Contents with Graphical Abstracts
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Comprehensive Two-Dimensional Gas Chromatography for Analysis of Volatile Compounds in Foods and Beverages |
Juliane Elisa Welke and Cláudia Alcaraz Zini |
| J. Braz. Chem. Soc. 2011, 22, 609. |
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| GC × GC color plot of a Brazilian base wine obtained with a polar and a medium-polar column set. |
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Web Release date: February 17, 2011. |
Metal Halide Hydrates as Lewis Acid Catalysts for the Conjugated Friedel-Crafts Reactions of Indoles and Activated Olefins |
Cristiane S. Schwalm, Marco Antonio Ceschi and Dennis Russowsky |
| J. Braz. Chem. Soc. 2011, 22, 623. |
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| Metal halide hydrates are efficient catalysts to the Conjugate Friedel-Crafts reaction (CFC) of Indoles and activated olefins in alcoholic media. Solvent-free conditions were successful applied to prepare nitro-adducts and b-carbolines in good yields in an environmentally-friend protocol. |
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Web Release date: November 23, 2010. |
2D Chemical Drawings Correlate to Bioactivities: MIA-QSAR Modelling of Antimalarial Activities of 2,5-Diaminobenzophenone Derivatives |
Rodrigo A. Cormanich, Matheus P. Freitas, and Roberto Rittner |
| J. Braz. Chem. Soc. 2011, 22, 637. |
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| QSAR based on 2D chemical images (MIA-QSAR) shows that bidimensional structures correlate with biological activities, and is a promising tool for the design of new antimalarial compounds, with modeling capability comparable to well established 3D approaches. |
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Web Release date: November 25, 2010. |
Quantification of Essential Fatty Acids in the Heads of Nile Tilapia (Oreochromis niloticus) Fed with Linseed Oil |
Ana C. Aguiar, Solange M. Cottica, Marcela Boroski, Cláudio C. Oliveira, Elton G. Bonafé, Polyana B. França, Nilson E. Souza and Jesui V. Visentainer |
| J. Braz. Chem. Soc. 2011, 22, 643. |
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| The fatty acid methyl esters (FAME) were prepared by methylation of the total lipids (TL) and separated by gas chromatography using as parameter the equivalent chain-length values (ECL) in the identification and flame Ionization detector response factors in the quantification. |
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Web Release date: November 25, 2010. |
Determination of p-Phenylenediamine by Perturbation of a Non-Equilibrium Stationary State in the B-Z Reaction |
Jinzhang Gao, Xiaodong Chen, Jie Ren and Wu Yang |
| J. Braz. Chem. Soc. 2011, 22, 648. |
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| Figure A shows a regular oscillator being translating gradually into a non-equilibrium stationary state. Figure B shows a bifurcation point. |
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Web Release date: November 30, 2010. |
Electrochemical Feasibility Study of Methyl Parathion Determination on Graphite-Modified Basal Plane Pyrolytic Graphite Electrode |
Leonardo Luiz Okumura, Adelir Aparecida Saczk, Marcelo Firmino de Oliveira, Ana Carolina C. Fulgêncio, Larissa Torrezani, Paulo Eduardo N. Gomes and Rosana M. Peixoto |
| J. Braz. Chem. Soc. 2011, 22, 652. |
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| SWV optimized responses for different MP concentrations in supporting electrolyte 0.20 mol L-1 acetate buffer pH 5.2 and volume of graphite suspension as a modifier of 10 mL. Inset: calibration curve for MP. |
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Web Release date: November 30, 2010. |
Synthesis, Characterization and Catalytic Activity of Two Novel cis - Dioxovanadium(V) Complexes: [VO2(L)] and [VO2(HLox)] |
Natália M. L. Silva, Carlos B. Pinheiro, Eluzir P. Chacon, Jackson A. L. C. Resende, José Walkimar
de M. Carneiro, Tatiana L. Fernández, Marciela Scarpellini and Mauricio Lanznaster |
| J. Braz. Chem. Soc. 2011, 22, 660. |
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| The complexes [VO2(L)] and [VO2(HLox)] were synthesized by the reaction of [VO(acac)2] with the ligands HL and H2Lox, respectively. Alternatively, [VO2(HLox)] was also obtained by the reaction of HL with [VO(acac)2] and hydroxylamine, or reacting [VO2(L)] with hydroxylamine. |
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Web Release date: December 2, 2010. |
EPR and Magnetic Studies of a Carboxylate-Bridged Dinuclear Copper(II) Compound: [Cu2(flu)4(dmf)2] |
Otaciro R. Nascimento, Lia M. B. Napolitano, María H. Torre, Octavio Peña and Rafael Calvo |
| J. Braz. Chem. Soc. 2011, 22, 669. |
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| In the GA we are showing the EPR line variation with temperature of single-crystal [Cu2(flu)4(dmf)2] compound and magnetic susceptibility versus temperature extracted from this measurements. |
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Web Release date: December 9, 2010. |
Pre-concentration of Lithium Prior to Its Determination in Honey by Flame Optical Emission Spectrometry |
Helena Stecka and Pawel Pohl |
| J. Braz. Chem. Soc. 2011, 22, 677. |
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| A procedure based on solid phase extraction with a strongly acidic cation-exchanger Dowex 50W×8-200 was proposed to pre-concentrate and determine ultra-traces of Li in floral honeys. It enabled to determine from 0.4 to 5.3 ng g-1 of Li with precision being within 8-11%. |
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Web Release date: December 14, 2010. |
QSPR Modeling using Catalan Solvent and Solute Parameters |
Abolghasem Jouyban, Mohammad A. A. Fakhree, Ali Shayanfar and Taravat Ghafourian |
| J. Braz. Chem. Soc. 2011, 22, 684. |
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| The Catalan solvent parameters were used to develop a new set of solute parameters. The developed solute parameters were used to propose a novel model for predicting aqueous solubility of solutes. The Catalan solvent parameters were employed to develop models for representing a number of physico-chemical properties of the solvents. |
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Web Release date: December 16, 2010. |
Electrochemical Oxidation of Caffeic and Ferulic Acid Derivatives in Aprotic Medium |
Magali Salas-Reyes, Javier Hernández, Zaira Domínguez, Felipe J. González, Pablo D. Astudillo, Rosa Elena Navarro, Evelin Martínez-Benavidez, Carlos Velázquez-Contreras and Samuel Cruz-Sánchez |
| J. Braz. Chem. Soc. 2011, 22, 693. |
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| The electrochemical oxidation of a series of caffeic and ferulic acids derivatives as well as their corresponding redox moieties catechol and guaiacol was studied as a function of the structure in aprotic medium. |
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Web Release date: December 21, 2010. |
Binding Events of (S )-N -(3-Oxo-octanoyl)-homoserine Lactone with Agrobacterium tumefaciens Mutant Cells Studied by Saturation Transfer Difference NMR |
Luís Fernando Cabeça, Armando Mateus Pomini, Pedro Luiz R. Cruz and Anita J. Marsaioli |
| J. Braz. Chem. Soc. 2011, 22, 702. |
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| Upper Figure: Saturation of a liposome 1H NMR signal transferred to the complex liposome-homoserine lactone (HSL)and dissociation produce free homoserine lactone with saturated hydrogens. Lower Figure: First binding events of the quorum sensing phenomenum showing the HSL diffusing through the bacterium membrane. |
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Web Release date: January 13, 2011. |
Application of Pyrite and Chalcopyrite Electrodes for the Acid-Base Determinations in Nitriles |
Zoran Simic, Zorka D. Stanic and Milan Antonijevic |
| J. Braz. Chem. Soc. 2011, 22, 709. |
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| In the course of the coulometric determinations of acids (bases) in non-aqueous solvents (AN and PN), the electrochemical generation of lyate (hydrogen) ions is performed by the reduction (oxidation) of an appropriate electroreactive compounds. The natural minerals pyrite (FeS2) and chalcopyrite (CuFeS2) have been used as the indicator electrodes. |
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Web Release date: January 18, 2011. |
Nanoporous of W/WO3 Thin Film Electrode Grown by Electrochemical Anodization Applied in the Photoelectrocatalytic Oxidation of the Basic Red 51 used in Hair Dye |
Luciano E. Fraga and Maria Valnice B. Zanoni |
| J. Braz. Chem. Soc. 2011, 22, 718. |
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| This image shows UV-Vis spectra and the present total color removal after 120 min of the 1.0 x10-5 mol L-1 basic red solution when treated by photoelectrocatalytic oxidation using both systems of irradiation (visible and ultraviolet) obtained before and after 120 min. |
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Web Release date: January 18, 2011. |
A Low-Cost Portable Microcontrolled Nephelometer for Potassium Determination |
Vagner B. dos Santos, Thiago B. Guerreiro, Willian T. Suarez, Ronaldo C. Faria and Orlando Fatibello-Filho |
| J. Braz. Chem. Soc. 2011, 22, 726. |
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Low-cost portable microcontrolled nephelometer.
a) Picture of the nephelometer developed;
b) Schematic diagram of the optical compartment showing the blue LED and photodiode TSLB257 at 90º and infrared LED and TSL260R-LF at 90º. |
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Web Release date: January 18, 2011. |
Visible LED-Based Instrumentation for Photometric Determination of Electroosmotic Flow in Microchannels |
José Alberto Fracassi da Silva, Ariane Deblire, Dosil P. de Jesus and Wendell Karlos T. Coltro |
| J. Braz. Chem. Soc. 2011, 22, 736. |
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| In this article we demonstrate how to use an inexpensive instrumentation based on visible-high intensity LED and microscope for the determination of the electroosmotic flow in microseparation devices. |
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Web Release date: January 20, 2011. |
Chemical Analysis of Essential Oils from Ocotea gomezii W.C. Burger and Ocotea morae Gómez-Laur. (Lauraceae) Collected at "Reserva Biológica Alberto M. Brenes" in Costa Rica and their Cytotoxic Activity on Tumor Cell Lines |
Carlos Chaverri, Cecilia Díaz and José F. Cicció |
| J. Braz. Chem. Soc. 2011, 22, 741. |
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Morphology of Ocotea morae (Lauraceae) and structural formulas of major constituents from leaves (b-pinene), bark (1,8-cineole) and wood [(E)-nerolidol] essential oils. |
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Web Release date: January 20, 2011. |
Development of Nano Poly(3-methyl thiophene)/Multiwalled Carbon Nanotubes Sensor for the Efficient Detection of Some Pesticides |
Palaniappan Abirama Sundari and Paramasivam Manisankar |
| J. Braz. Chem. Soc. 2011, 22, 746. |
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| We demonstrate the fabrication of nanosize poly(3-methyl thiophene) (P3MT)/ multiwalled carbon nanotubes (MWCNTs) modified glassy carbon (GCE) electrode for the sensitive determination of some common pesticides. |
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Web Release date: January 20, 2011. |
An Alternative Mechanism for the 1,4-Asymmetric Induction in the Stereoselective Addition of (R)-Pantolactone to 2-Phenylpropylketene |
Alexander M. Silva, Clarissa O. da Silva, André G. H. Barbosa, Rosane A. Fontes, Sergio Pinheiro, Marco Edilson F. Lima and Rosane N. Castro |
| J. Braz. Chem. Soc. 2011, 22, 756. |
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| Two possible mechanisms for the 1,4-asymmetric induction in the stereoselective addition of (R)-pantolactone to 2-phenylpropylketene. |
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Web Release date: January 25, 2011. |
Electrochemical Behavior and Determination of Fluconazole |
Éric de S. Gil, Diogo D. Cordeiro, Ana E. B. Matias and Sílvia H. P. Serrano |
| J. Braz. Chem. Soc. 2011, 22, 767. |
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| Voltammograms and the analytical curve obtained at glassy carbon electrode in 0.1 mol L-1 phosphate buffer solution, pH 8.0 obtained at glassy carbon electrode for blank and fluconazole solutions. |
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Web Release date: January 25, 2011. |
Nutrients in Amazonian Black Earth from Caxiuanã Region |
Vanda P. Lemos, Antônio R. de Oliveira Meireles, Kelly das Graças Fernandes, Milena C. de Moraes, Marcondes L. da Costa, Any K. Terra Silva and Dirse C. Kern |
| J. Braz. Chem. Soc. 2011, 22, 772. |
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| Trend of the concentrations of Mg, Ca, P and organic matter in archaeological black earth (ABE) at the site Ilha de Terra from Caxiuanã suggests placeholders as cemetery, religious ceremonies and food preparations by ancient inhabitants of this site. |
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Web Release date: January 27, 2011. |
Synthesis, Characterization and Photovoltaic Properties of Di-Anchoring Organic Dyes |
Tzi-Yi Wu, Ming-Hsiu Tsao, Shyh-Gang Su, H. Paul Wang, Yuan-Chung Lin, Fu-Lin Chen, Cheng-Wen Chang and I-Wen Sun |
| J. Braz. Chem. Soc. 2011, 22, 780. |
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| Organic dyes comprising carbazole, iminodibenzyl and phenothiazine moieties, respectively, as the electron donors and di-anchoring rhodanine rings as the electron acceptors are synthesized and evaluated for use in dye-sensitized solar cells. Solar cells employing these organic dyes show good overall conversion efficiency (up to 4.91%). |
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Web Release date: February 17, 2011. |
Exhausted Yerba Mate Leaves (Ilex paraguariensis) as Biosorbent for the Removal of Metals from Aqueous Solutions |
Guillermo J. Copello, Rodolfo E. Garibotti, Florencia Varela, María V. Tuttolomondo and Luis E. Diaz |
| J. Braz. Chem. Soc. 2011, 22, 790. |
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| Exhausted yerba mate leaves (Ilex paraguariensis) demonstrated to effectively adsorb metals from aqueous solutions, such as Cr(VI), which suggest the applicability of this cost effective biosorbent. |
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Web Release date: January 18, 2011. |
New Adducts of Lapachol with Primary Amines |
Mirelly D. F. Santos, José T. Litivack-Junior, Roberto V. Antunes, Tania M. S. Silva and Celso A. Camara |
| J. Braz. Chem. Soc. 2011, 22, 796. |
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| In this reaction substituted phenazines are formed by the neat reaction of alkylamines with lapachol, and in the figure the nitrogens are painted in blue to emphazise that one of the ring is originated from a Strecker degradation reaction. |
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Web Release date: January 25, 2011. |
Fast Analysis of Taurine in Energetic Drinks by Electrospray Ionization Mass Spectrometry |
Rodrigo R. Catharino, Renato Haddad, Helena T. Godoy, Marcos N. Eberlin and Leonardo S. Santos |
| J. Braz. Chem. Soc. 2011, 22, 801. |
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| Direct infusion ESI-MS/MS in the negative ion mode using SRM (m/z 124 -> m/z 80) was applied with high confidence, speed and selectivity to quantifty taurine in energetic drinks. |
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Web Release date: January 25, 2011. |
Additions and Corrections |
| J. Braz. Chem. Soc. 2011, 22, 807; for 2011, vol. 22, No 2, 300-307. |
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