JBCS

4:20, Wed Apr 16

Most Highly Cited Articles
(1995-2012)

Web of ScienceTM Core Collection
Apr/2014


1. Transesterification of vegetable oils: a review
Schuchardt, U; Sercheli, R; Vargas, RM; 9 (3), 199-210   1998

Times Cited: 457


2. On the solid, liquid and solution structural organization of imidazolium ionic liquids
Dupont, J; 15 (3), 341-350     2004

Times Cited: 411


3. The chemistry of isatins: a review from 1975to 1999
da Silva, JFM; Garden, SJ; Pinto, AC; 12 (3), 273-U86 2001  

Times Cited: 372


4. Biodiesel: An overview
Pinto, AC; Guarieiro, LLN; Rezende, MJC, et al., 16 (6B), 1313-1330 2005

Times Cited: 321


5. Chiral Lewis acid catalysts in Diels-Alder cycloadditions: Mechanistic aspects and synthetic applications of recent systems
Dias, LC; 8 (4), 289-332 1997

Times Cited: 171


6. Room temperature molten salts: Neoteric "green" solvents for chemical reactions and processes
Dupont, J; Consorti, CS; Spencer, J ; 11 (4), 337-344 2000

Times Cited: 154


7. Near infrared spectroscopy: Fundamentals, practical aspects and analytical applications
Pasquini, C; 14 (2) 198-219 2003

Times Cited: 130


8. Laser induced breakdown spectroscopy
Pasquini, C; Cortez, J; Silva, LMC; et al.; 18 (3) 463-512 2007

Times Cited: 130


9. Adsorption of anionic dyes on the biopolymer chitin
Longhinotti, E; Pozza, F; Furlan, L; et al.; 9 (5) 435-440 1998

Times Cited: 92


10. Traditional uses, chemistry and pharmacology of Croton species (Euphorbiaceae)
Salatino, Antonio; Salatino, Maria L. Faria; Negri, Giuseppina; 18 (1) 17-33 2007

Times Cited: 88


Current Issue vol. 25, No. 4, 2014, p. 611-795

 

The Brazilian Federal Police illicit drug chemical profiling program (PeQui project) was designed to provide useful forensic chemistry results and police intelligence information. Cocaine samples seized in eight Brazilian states were analyzed by quantitative gas chromatography-flame ionization detector (GC-FID) and data were interpreted regarding detailed organic chemical composition. Details are presented in the Editorial Chemical Profiling of Cocaine Seized by Brazilian Federal Police in 2009-2012: Major Components by Élvio D. Botelho, Ricardo B. Cunha, Alex Fabiano C. Campos and Adriano O. Maldaner on page 611.


Cover Article
J. Braz. Chem. Soc. 2014, 25(4), 611-618

Chemical Profiling of Cocaine Seized by Brazilian Federal Police in 2009-2012: Major Components

Élvio D. Botelho; Ricardo B. Cunha; Alex Fabiano C. Campos; Adriano O. Maldaner

How to cite this article

The Brazilian Federal Police illicit drug chemical profiling program (PeQui project) was designed to provide useful forensic chemistry results and police intelligence information. Cocaine samples seized in eight Brazilian states were analyzed by quantitative gas chromatography-flame ionization detector (GC-FID) and data were interpreted regarding detailed organic chemical composition. Details are presented in the Editorial Chemical Profiling of Cocaine Seized by Brazilian Federal Police in 2009-2012: Major Components by Élvio D. Botelho, Ricardo B. Cunha, Alex Fabiano C. Campos and Adriano O. Maldaner on page 611.

http://dx.doi.org/10.5935/0103-5053.20140008

Published online: January 17, 2014
Articles J. Braz. Chem. Soc. 2014, 25(4), 611-618

Chemical Profiling of Cocaine Seized by Brazilian Federal Police in 2009-2012: Major Components

Élvio D. Botelho; Ricardo B. Cunha; Alex Fabiano C. Campos; Adriano O. Maldaner

How to cite this article

 

Cocaine samples seized in several Brazilian states between 2009 and 2012 were analyzed by the Federal Police chemical profiling program (PeQui project). Cocaine purity, degree of oxidation and pharmaceutical products used as cutting agents were determined by gas chromatography-flame ionization detector (GC-FID) analysis.

http://dx.doi.org/10.5935/0103-5053.20140008

Published online: January 17, 2014

J. Braz. Chem. Soc. 2014, 25(4), 619-628

A Novel Computational Approach for Development of Highly Selective Fenitrothion Imprinted Polymer: Theoretical Predictions and Experimental Validations

Leonardo Augusto de Barros; Leandro Alves Pereira; Rogério Custódio; Susanne Rath

How to cite this article

 

Molecular imprinting is a technique that creates recognition sites specific for a target molecule within a synthetic polymer. The so-called molecular imprinting polymers are rigid polymeric materials that present high molecular recognition properties for a target molecule called template. After polymerization, the template is extracted from the polymer network, leaving its imprinting in the polymer structure.

http://dx.doi.org/10.5935/0103-5053.20140009

Published online: January 17, 2014
J. Braz. Chem. Soc. 2014, 25(4), 629-638

Experimental and NMR Theoretical Methodology Applied to Geometric Analysis of the Bioactive Clerodane trans-Dehydrocrotonin

Breno Almeida Soares; Caio Lima Firme; Maria Aparecida Medeiros Maciel; Carlos R. Kaiser; Eduardo Schilling; Adailton J. Bortoluzzi

How to cite this article

 

X-ray diffraction, nuclear magnetic resonance analysis and theoretical methodology were applied to the bioactive clerodane t-DCTN resulting in good correlations between experimental (obtained in a 600 MHz equipment) and theoretical magnetic properties (from B3LYP/6-311G++(d,p)).

http://dx.doi.org/10.5935/0103-5053.20140010

Published online: January 17, 2014

J. Braz. Chem. Soc. 2014, 25(4), 639-647

Amburanins A and B from Amburana cearensis: Daphnodorin-Type Biflavonoids that Modulate Human Neutrophil Degranulation

Kirley M. Canuto; Luzia K. A. M. Leal; Amanda A. Lopes; Christina M. Coleman; Daneel Ferreira; Edilberto R. Silveira

How to cite this article

 

Two new biflavonoids, amburanins (1) A and B (2), isolated from the trunk bark of Amburana cearensis, inhibited human neutrophil degranulation and myeloperoxidase activity, demonstrating a potential anti-inflammatory effect.

http://dx.doi.org/10.5935/0103-5053.20140011

Published online: January 17, 2014

J. Braz. Chem. Soc. 2014, 25(4), 648-657

Adsorption of 1-(2-Thiazolylazo)-2-Naphthol on Amberlite XAD-7 and Silica Gel: Isotherms and Kinetic Studies

Grazielle C. Anaia; Patricia A. M. Freitas; Maria E. V. Suárez-Iha; Fábio R. P. Rocha

How to cite this article

 

Kinetic and thermodynamic studies of the adsorption of 1-(2 thiazolylazo)-2-naphtol on XAD-7 or silica gel aiming the selection of the best adsorbent for solid-phase extraction.

http://dx.doi.org/10.5935/0103-5053.20140012

Published online: January 21, 2014
J. Braz. Chem. Soc. 2014, 25(4), 658-664

Ligand-less Rapidly Synergistic Cloud Point Extraction as an Efficient Method for the Separation and Preconcentration of Trace Amounts of Lead from Food and Water Samples

Reyhaneh Rahnama; Sorour Eram; Mohammad Reza Jamali

How to cite this article

 

A simple rapidly synergistic cloud point extraction procedure has been developed for the separation and preconcentration of trace amounts of lead from food and water samples by flame atomic absorption spectrometry (FAAS).

http://dx.doi.org/10.5935/0103-5053.20140013

Published online: January 21, 2014
J. Braz. Chem. Soc. 2014, 25(4), 665-674

Use of Chemometric Tools to Determine the Source of Metals in Sediments of the Rivers of the Turvo/Grande Hydrographical Basin, São Paulo State, Brazil

Mariele B. Campanha; João Paulo Romera; Jéssica Coelho; Edenir R. Pereira-Filho; Altair B. Moreira; Márcia C. Bisinoti

How to cite this article

 

It was assessed the concentrations of metals (Al, Cr, Cu, K, Mn, Ni, Pb e Zn) in superficial and core sediments from 5 sampling sites along the Turvo/Grande hydrographic basin. Principal Component Analysis (PCA) and Pearson's correlation matrix were performed to evaluate the source of metals. Zn has anthropic contribution in sites from the urban area, while Al, Mn, K and N at the site in rural area are from agricultural runoff.

http://dx.doi.org/10.5935/0103-5053.20140014

Published online: January 21, 2014

J. Braz. Chem. Soc. 2014, 25(4), 675-685

Study of Fatty Acids Profile in Biological Sample by Capillary Zone Electrophoresis Associate to Chemometric Approach

Patrícia M. C. Barra; Patrícia L. Oliveira; Danielle M. O. Aragão; Céphora M. Sabarense; Beatriz J. V. Aarestrup; Mônia S. Azevedo; Ana Carolina O. Costa; Gustavo A. Micke; Marcone A. L. Oliveira

How to cite this article

 

The determination of fatty acids (FA) in liver from three different groups of Wistar rats submitted to different diets (AIN93G) by capillary zone electrophoresis (CZE) signals as an interesting alternative to biologic analysis when chemometrics is associated to histopathologic analysis.

http://dx.doi.org/10.5935/0103-5053.20140015

Published online: January 24, 2014
J. Braz. Chem. Soc. 2014, 25(4), 686-696

Migration of Residual Nonvolatile and Inorganic Compounds from Recycled Post-Consumer PET and HDPE

Camila Dutra; Maria Teresa de A. Freire; Cristina Nerín; Karim Bentayeb; Angel Rodriguez-Lafuente; Margarita Aznar; Felix G. R. Reyes

How to cite this article

 

The opportunity of converting post-consumer plastic materials into food contact packaging requires the development of reliable analytical methods to determine the potential migration of residual contaminants, in order to ensure the package safety for its intended use. In this study post-consumer PET and HDPE, submitted to several cleaning process, were evaluated to migration tests for determination of nonvolatile and inorganic elements.

http://dx.doi.org/10.5935/0103-5053.20140016

Published online: January 24, 2014
J. Braz. Chem. Soc. 2014, 25(4), 697-703

HPLC-FLD Method for Itraconazole Quantification in Poly Lactic-co-glycolic Acid Nanoparticles, Plasma and Tissue

Karen R. Py-Daniel; Osmindo R. Pires Junior; Carlos M. Infante C.; Maria L. Fascineli; Antonio C. Tedesco; Ricardo B. Azevedo

How to cite this article

 

This study developed an analytical method for high performance liquid chromatography (HPLC) with fluorometric detection for quantification of itraconazole in poly lactic-co-glycolic acid nanoparticles, plasma and tissue, which is sensitive, low cost, viable for routine usage and with potential for application in itraconazole biodistribution and pharmacokinetics studies.

http://dx.doi.org/10.5935/0103-5053.20140022

Published online: January 31, 2014
J. Braz. Chem. Soc. 2014, 25(4), 704-708

A New Flavonoid Derivative from Leaves of Oxandra sessiliflora R. E. Fries

Elcilene A. de Sousa; Armenio A. C. A. da Silva; Alberto J. Cavalheiro; João Henrique G. Lago; Mariana H. Chaves

How to cite this article

 

One new flavonoid, quercetin-3-O-α-L-rhamnopyranosil-(1→4)-β-D-glucopyranoside, together with kaempferol-3-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranoside, rutin, and kaempferol-3-O-rutinoside were isolated from the leaves of Oxandra sessiliflora R. E. Fries (Annonaceae). The structure of the compound was elucidated by spectroscopic methods, including extensive 1D and 2D-nuclear magnetic resonance (NMR) techniques.

http://dx.doi.org/10.5935/0103-5053.20140023

Published online: January 31, 2014

J. Braz. Chem. Soc. 2014, 25(4), 709-715

A Nanoparticle-Based Solid-Phase Extraction Procedure Followed by Spectrofluorimetry to Determine Carbaryl in Different Water Samples

Ahad Bavili Tabrizi; Mohammad Reza Rashidi; Hadi Ostadi

How to cite this article

 

A new method based on combination of NP based SPE with spectrofluorimetric detection has been developed for the extraction and determination of trace amounts of carbaryl in environmental water samples.

http://dx.doi.org/10.5935/0103-5053.20140024

Published online: February 4, 2014
J. Braz. Chem. Soc. 2014, 25(4), 716-725

Porous Ceramic Materials From Polysiloxane-Clay Composites

Mariana G. Segatelli; Manuela L. Q. A. Kaneko; Viviane P. Silva; Inez V. P. Yoshida

How to cite this article

 

Ni- and C-rich islands associated to presence of pores on polymer-derived ceramics contributed to the formation of ultra-long nanowires at high temperature.

http://dx.doi.org/10.5935/0103-5053.20140025

Published online: February 4, 2014
J. Braz. Chem. Soc. 2014, 25(4), 726-733

Photoelectroactivity of Bismuth Vanadate Prepared by Combustion Synthesis: Effect of Different Fuels and Surfactants

Renata Afonso; Jéssica A. Serafim; Adriana C. Lucilha; Marcelo R. Silva; Luiz F. Lepre; Rômulo A. Ando; Luiz H. Dall'Antonia

How to cite this article

 

BiVO4 photoelectrodes when irradiated with light promote an augmentation in photocurrent.

http://dx.doi.org/10.5935/0103-5053.20140026

Published online: February 4, 2014
J. Braz. Chem. Soc. 2014, 25(4), 734-742

Combination of Directly Suspended Droplet Microextraction and Flame Atomic Absorption Spectrometry for Determination of Trace Amounts of Iron and Copper

Shahed Hassanpoor; Gholamreza Khayatian

How to cite this article

 

Directly suspended droplet microextraction (DSDME) combined with flame atomic absorption spectrophotometry (FAAS) was developed for the first time for determination of Cu (II) and Fe (III) in different samples. DSDME provides more flexibility and simplicity in the choice of the operational extraction parameters and does not need any special glass tube for extraction and solvent collection.

http://dx.doi.org/10.5935/0103-5053.20140027

Published online: February 4, 2014
J. Braz. Chem. Soc. 2014, 25(4), 743-749

High Pressure Asher (HPA-S) Decomposition of Biodiesel Samples for Elemental Analysis by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES)

Ana Paula Packer; Jorge Eduardo S. Sarkis; Maria Fernanda Giné; Éder José dos Santos

How to cite this article

 

The presence of some inorganic elements in biodiesel has a direct influence on the engine performance and fuel behavior. In this context, the quantification of several elements becomes necessary to evaluate fuel quality and to control the pollutant emission. A decomposition procedure for oil based samples using a high pressure asher was evaluated.

http://dx.doi.org/10.5935/0103-5053.20140028

Published online: February 7, 2014
J. Braz. Chem. Soc. 2014, 25(4), 750-758

Effects of Impregnation Methods and Drying Conditions on Quinoline Hydrodenitrogenation over Ni-W Based Catalysts

Fang Guo; Shaoqing Guo; Zegang Qiu; Liangfu Zhao; Hongwei Xiang

How to cite this article

 

The effects of impregnation methods and drying conditions on the structure and catalytic behavior of MCM-41-supported Ni-W catalysts were investigated. Co-impregnation and drying under vacuum favoured the formation of octahedrally coordinated W species that could be easily sulfided and involved in the genesis of active sites with high HDN catalytic performances.

http://dx.doi.org/10.5935/0103-5053.20140035

Published online: February 11, 2014
J. Braz. Chem. Soc. 2014, 25(4), 759-769

Study of Biodiesel Photodegradation Through Reactions Catalyzed by Fenton's Reagent

Elizangela Ambrosio; Lorena M. Milano; Maísa Tatiane F. de Souza; Lucas U. R. Chiavelli; Paula F. Montanher; Jesuí V. Visentainer; Vitor de C. Almeida; Nilson E. Souza; Juliana C. Garcia

How to cite this article

 

Biodiesel was degraded in contact with water. Fenton's reagent and UV-Vis light was used to speed up the process.

http://dx.doi.org/10.5935/0103-5053.20140036

Published online: February 11, 2014

J. Braz. Chem. Soc. 2014, 25(4), 770-776

Rapid and Variable-Volume Sampling Loading in Nonaqueous Microchip Electrophoresis

Zhenhua Li; Yuanming Guo; Yongdong Zhou; Xiaoning Zhang; Hongmei Hu

How to cite this article

 

A rapid and variable-volume sample loading scheme for nonaqueous microchip electrophoresis with laser induced fluorescence detection (NAMCE-LIF) has been developed, which includes a porous polymer plug, a microvacuum pump, and a single potential supply.

http://dx.doi.org/10.5935/0103-5053.20140038

Published online: February 14, 2014
J. Braz. Chem. Soc. 2014, 25(4), 777-782

Facile Chemiluminescence Assay for Acyl-CoA Oxidase Activity: Fundamentals and Illustrative Examples

Min Yao; Xiangdong Xu; Yang Liu; Lingling Jiang

How to cite this article

 

We have developed a novel "two-step" chemiluminescent method for the quantitation of acyl-CoA oxidase activity based on the chemiluminescent reaction between the H2O2 produced during the acyl-CoA oxidase-catalyzed reaction and luminol.

http://dx.doi.org/10.5935/0103-5053.20140039

Published online: February 14, 2014
Short Report J. Braz. Chem. Soc. 2014, 25(4), 783-787

A Rapid and Simple Method for Determination of 5-Hydroxytryptophan in Dietary Supplements by Capillary Electrophoresis

Aline G. Coelho; Fernanda P. C. Aguiar; Dosil P. de Jesus

How to cite this article

 

Schematic illustration of the analytical approach for determination of 5-hydroxytryptophan (5 HTP) in dietary supplements.

http://dx.doi.org/10.5935/0103-5053.20140029

Published online: February 7, 2014
J. Braz. Chem. Soc. 2014, 25(4), 788-794

Rodriguesic Acids, Modified Diketopiperazines from the Gastropod Mollusc Pleurobranchus areolatus

Fabio R. Pereira; Mario F. C. Santos; David E. Williams; Raymond J. Andersen; Vinicius Padula; Antonio G. Ferreira; Roberto G. S. Berlinck

How to cite this article

 

Rodriguesic acid and rodriguesic acid hydroxamate are the first diketopiperazines isolated from a marine mollusc. A carboxylic acid replacing the terminal methyl group of an alkyl chain constitutes an unusual structural feature of both rodriguesic acids.

http://dx.doi.org/10.5935/0103-5053.20140037

Published online: February 11, 2014

Additions and Corrections J. Braz. Chem. Soc. 2014, 25(4), , 795

Refining of Buriti Oil (Mauritia flexuosa) Originated from the Brazilian Cerrado: Physicochemical, Thermal-Oxidative and Nutritional Implications

Jailane de Souza Aquino; Débora C. N. de Pontes Pessoa; Kassandra de Lourdes G. V. Araújo; Poliana S. Epaminondas; Alexandre Ricardo P. Schuler; Antônio G. de Souza; Tânia Lúcia M. Stamford

How to cite this article

 

http://dx.doi.org/10.5935/0103-5053.20140054

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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