JBCS

21:45, Sun Sep 24

Open Access/APCs

vol. 24, No. 9, 2013, p. 1385-1548



Cover Article
J. Braz. Chem. Soc. 2013, 24(9), 1537-1543

Nanocellulose and Bioethanol Production from Orange Waste using Isolated Microorganisms

Junko Tsukamoto; Nelson Durán; Ljubica Tasic

How to cite this article

Citrus processing waste from oranges (CPWO) was recycled into essential oil, bioethanol and nanocellulose. CPWO was also used as a source for isolating native microorganisms that, already adapted to this biomass, were capable to ferment hydrolyzed CPWO even in the presence of higher amounts of D-limonene. In an environmentally friendly process, we have obtained nanocellulose and nanofibers from all solid residues and this important commodity was obtained for the first time from the CPWO. Details are presented in the Article Nanocellulose and Bioethanol Production from Orange Waste using Isolated Microorganisms by Junko Tsukamoto, Nelson Durán and Ljubica Tasic on page 1537.

http://dx.doi.org/10.5935/0103-5053.20130195

Published online: August 20, 2013

Articles J. Braz. Chem. Soc. 2013, 24(9), 1385-1395

Quantification of Pharmaceuticals and Personal Care Product Residues in Surface and Drinking Water Samples by SPE and LC-ESI-MS/MS

Maria Angelis K. Silveira; Sergiane S. Caldas; Juliana R. Guilherme; Fabiane P. Costa; Bruno de S. Guimarães; Maristela B. R. Cerqueira; Bruno M. Soares; Ednei G. Primel

How to cite this article

 

A method for determination of nimesulide, amitriptyline, enalapril, glibenclamide, haloperidol and methylparaben in water samples using a solid-phase extraction and liquid chromatography tandem mass spectrometry is presented. Good accuracy and precision were obtained.

http://dx.doi.org/10.5935/0103-5053.20130176

Published online: August 6, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1396-1402

A Straightforward and Efficient Method for the Synthesis of Diversely Substituted β-Aminoketones and γ-Aminoalcohols from 3-(N,N-Dimethylamino)propiophenones as Starting Materials

Rodrigo Abonia; Danny Arteaga; Juan Castillo; Braulio Insuasty; Jairo Quiroga; Alejandro Ortíz

How to cite this article

 

Novel β-aminoketones and γ-aminoalcohols showing a wide structural diversity were easily obtained through a simple approach by using 3-(N,N-dimethylamino)propiophenone derivatives as key starting material. This protocol proved to be convenient as an alternative route for the synthesis of the local anesthetic Falicain® and for the topic antifungal drug Naftifine®.

http://dx.doi.org/10.5935/0103-5053.20130177

Published online: August 6, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1403-1413

Optimization and Validation of FTIR Method with Tetrachloroethylene for Determination of Oils and Grease in Water Matrices

Cristina M. M. Almeida; Sofia Silvério; Cláudia Silva; Ana Paulino; Sandra Nascimento; Célia A. Revez

How to cite this article

 

Oils and grease are important parameters for water quality and safety. A Fourier transform infrared method with tetrachloroethylene was implemented and validated, and this extraction solvent was a suitable replacement to Freon 113.

http://dx.doi.org/10.5935/0103-5053.20130179

Published online: August 6, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1414-1419

Iodine-Catalyzed Prins Cyclization of Aliphatic and Aromatic Ketones

K. R. Kishore K. Reddy; Luiz F. Silva Jr.

How to cite this article

 

A protocol for the Prins cyclization under mild and metal-free conditions is described.

http://dx.doi.org/10.5935/0103-5053.20130178

Published online: August 6, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1420-1426

Synthesis of 2,3-Diyne-1,4-naphthoquinone Derivatives and Evaluation of Cytotoxic Activity against Tumor Cell Lines

Mauro G. Silva; Celso A. Camara; Tania M. S. Silva; Anderson C. S. Feitosa; Assuero S. Meira; Cláudia Pessoa

How to cite this article

 

A series of naphthoquinone diynes containing aryl, alkyl, hydroxyalkyl and derivatives were synthesized. These compounds were evaluated for cytotoxicity against three tumor cell lines, presenting satisfactory results for cell growth inhibition.

http://dx.doi.org/10.5935/0103-5053.20130180

Published online: August 9, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1427-1432

Chemoenzymatic Resolution of β-Azidophenylethanols by Candida antarctica and their Application for the Synthesis of Chiral Benzotriazoles

Lenilson C. Rocha; Isac G. Rosset; Gliseida Z. Melgar; Cristiano Raminelli; André L. M. Porto; Alex H. Jeller

How to cite this article

 

This work describes kinetic resolutions of (±)-β-azidophenylethanols, the enantiomerically enriched (R)-β-azidophenylethanols were subjected to cyclization reaction producing chiral 1,2,3-benzotriazole compounds in good yields.

http://dx.doi.org/10.5935/0103-5053.20130181

Published online: August 9, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1433-1441

UV Filters in Water Samples: Experimental Design on the SPE Optimization followed by GC-MS/MS Analysis

Claudia P. da Silva; Elissandro S. Emídio; Mary R. R. de Marchi

How to cite this article

 

A fractional factorial design was used to optimize the procedure for solid-phase extraction to achieve reliable, quick and optimal conditions. Recovery and precision were improved with the optimized conditions for all analyzed compounds (benzophenone-3, ethylhexyl methoxycinnamate, ethylhexyl salicylate and octocrylene) for river and drinking water.

http://dx.doi.org/10.5935/0103-5053.20130182

Published online: August 9, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1442-1450

Extractability of Copper and Application of Diffusive Gradients in Thin Films: Metal Availability in Contaminated Soil by Biosolids

Tatiana Garrido Reyes; Jorge Mendoza Crisosto; Yaris Velásquez Vergara

How to cite this article

 

In this study, it was possible to directly relate the metal extracted by devices based on the technique of diffusion gradients in thin films (DGT) with the available metal with CaCl2 or the metal bound to soil organic matter.

http://dx.doi.org/10.5935/0103-5053.20130183

Published online: August 9, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1451-1460

Degradation of the Commercial Herbicide Glyphosate by Photo-Fenton Process: Evaluation of Kinetic Parameters and Toxicity

Danilo R. de Souza; Alam G. Trovó; Nelson R. Antoniosi Filho; Marcos A. A. Silva; Antonio E. H. Machado

How to cite this article

 

Toxicity reduction (74%) in aqueous solutions containing glyphosate after photocatalytic treatment using photo-Fenton process

http://dx.doi.org/10.5935/0103-5053.20130185

Published online: August 13, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1461-1468

Simultaneous Voltammetric Determination of Acetaminophen and Caffeine at a Graphite and Polyurethane Screen-Printed Composite Electrode

Thalita R. Saciloto; Priscila Cervini; Éder T. G. Cavalheiro

How to cite this article

 

A screen-printed electrode based on a graphite and polyurethane resin composite (EIGPU) was applied in the simultaneous determination of acetaminophen and caffeine in pharmaceutical samples analysis. In good agreement with the declared lable contents as well as HPLC results. The figure depicts the DPV curve of a solution containing both analytes at the EIGPU under optimized conditions as described in the text.

http://dx.doi.org/10.5935/0103-5053.20130186

Published online: August 13, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1469-1477

Construction of Analytical Curve Fit Models for Simvastatin using Ordinary and Weighted Least Squares Methods

Flávia D. Marques-Marinho; Ilka A. Reis; Cristina D. Vianna-Soares

How to cite this article

 

The studentized residual plot of the ordinary least squares regression (OLSM) does not show homoscedastic variance since response variance increases with the mean response, violating the OLSM assumptions. With WLSM approach adoption, the heteroscedasticity problem was corrected by using different weights for the observations.

http://dx.doi.org/10.5935/0103-5053.20130187

Published online: August 13, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1478-1486

Microwave-Assisted Extraction Combined with HPLC-MS/MS for Diagnosis of Fungal Contamination in Building Materials

Daria Horbik; Aldona Łowińska-Kluge; Zbigniew Górski; Ewa Stanisz; Agnieszka Zgoła-Grześkowiak

How to cite this article

 

The ergosterol determination by high performance liquid chromatography-tandem mass spectrometry as a sensitive indicator of fungal contamination of building materials is presented. The presence of fungi was confirmed with the use of electron microscope and bioluminescence measurements.

http://dx.doi.org/10.5935/0103-5053.20130191

Published online: August 16, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1487-1496

The Ru—NO Bonding in Nitrosyl-[poly(1-pyrazolyl)borate]ruthenium Complexes: a Theoretical Insight based on EDA

Giovanni F. Caramori; André G. Kunitz; Daniel F. Coimbra; Leone C. Garcia; David E. P. Fonseca

How to cite this article

 

The effects of the pseudoaxial substituents (L) on the lability of {Ru—NO}6 bond in nitrosyl-[poly(1-pyrazolyl)borate]ruthenium complexes are investigated at the light of energy decomposition analysis (Su-Li EDA).

http://dx.doi.org/10.5935/0103-5053.20130188

Published online: August 16, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1497-1503

Enantioselective Synthesis of both (—)-(R)- and (+)-(S)-Angustureine Controlled by Enzymatic Resolution

Gaspar Diaz; Marisa A. N. Diaz; Marco A. Reis

How to cite this article

 

This work describes a new synthesis of (—)-(R)- and (+)-(S)-angustureine enantiomers from a racemic β-amino ester controlled by kinetic enzymatic resolution. Synthesis of both alkaloids was achieved in good yields and excellent enantiomeric excesses.

http://dx.doi.org/10.5935/0103-5053.20130189

Published online: August 16, 2013


J. Braz. Chem. Soc. 2013, 24(9), 1504-1511

Determination of Propylthiouracil in Pharmaceuticals by Differential Pulse Voltammetry Using a Cathodically Pretreated Boron-Doped Diamond Electrode

Elen Romão Sartori; Aline Barrios Trench; Romeu C. Rocha-Filho; Orlando Fatibello-Filho

How to cite this article

 

A cathodically pretreated boron-doped diamond electrode and differential pulse voltammetry are used to determine propylthiouracil (PTU). For the first time in the literature, a non-modified solid electrode is used to analyze PTU in pharmaceutical formulations, with results in agreement with those of a comparative titration method.

http://dx.doi.org/10.5935/0103-5053.20130190

Published online: August 16, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1512-1519

Synthesis and Characterization of a Novel Stationary Phase, Si-Zr/Ti(PMTDS), Based upon Ternary Oxide Support for High Performance Liquid Chromatography

Maura R. Amparo; Fabiana A. Marques; Anizio M. Faria

How to cite this article

 

Si-Zr/Ti(PMTDS) is a new stationary phase for reversed-phase high-performance liquid chromatography that presents retention properties similar to those zirconized silica-based PMTDS phases and hydrolytical stability similar to those titanized silica-based PMTDS phases.

http://dx.doi.org/10.5935/0103-5053.20130192

Published online: August 20, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1520-1529

Application of Box-Behnken Design to the Study of Fatty Acids and Antioxidant Activity from Enriched White Bread

Swami A. Maruyama; Sylvio V. Palombini; Thiago Claus; Fabiana Carbonera; Paula F. Montanher; Nilson E. de Souza; Jesuí V. Visentainer; Sandra T. M. Gomes; Makoto Matsushita

How to cite this article

 

This work determined proximate/fatty acid compositions and antioxidant activity of breads using a Box-Behnken design composed of fifteen experiments and three factors. The studied breads had altered baking times and the wheat flour used was partially substituted by chia seeds and carrot leaves.

http://dx.doi.org/10.5935/0103-5053.20130193

Published online: August 20, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1530-1536

Application of Solid Phase Microextraction and Gas Chromatography for the Determination of BTEX in Solid Petroleum Residues

Morgana Frena; Alessandra Emanuele Tonietto; Luiz Augusto dos Santos Madureira

How to cite this article

 

A simple and fast method was developed for the determination of BTEX (benzene, toluene, ethylbenzene and xylene) in solid waste and solutions obtained from leaching applying procedures detailed in the ABNT NBR 10004/2004Brazilian standard for the classification of solid residues.

http://dx.doi.org/10.5935/0103-5053.20130194

Published online: August 20, 2013

J. Braz. Chem. Soc. 2013, 24(9), 1537-1543

Nanocellulose and Bioethanol Production from Orange Waste using Isolated Microorganisms

Junko Tsukamoto; Nelson Durán; Ljubica Tasic

How to cite this article

 

This work describes recycling of citrus processing waste from oranges (CPWO) and a production of: essential oil, bioethanol and nanocellulose. This work also explores fermentation abilities of microorganisms isolated from the target biomass.

http://dx.doi.org/10.5935/0103-5053.20130195

Published online: August 20, 2013

Short Report J. Braz. Chem. Soc. 2013, 24(9), 1544-1548

Phenolic Compounds from the Roots of Valeriana officinalis var. latifolia

Peng-Cheng Wang; Xin-Hui Ran; Huai-Rong Luo; Qing-Yun Ma; Yu-Qing Liu; Jun Zhou; You-Xing Zhao

How to cite this article

 

A new benzofuran neolignan, dihydrodehydrodiconiferyl alcohol 9-isovalerate, along with ten known phenolic compounds were isolated from the roots of Valeriana officinalis var. latifolia.

http://dx.doi.org/10.5935/0103-5053.20130184

Published online: August 9, 2013

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
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