JBCS

17:06, Sat Dec 15

Open Access/APCs

The JBCS Office will be closed from Dec 22 to Jan 2

Non-stopping MS submission process and correspondence receiving
(to be processed in the return on Jan 3, 2019)

vol. 29, No. 9, 2018, p. 1777-1979

 

Ecstasy is a term typically used to describe drugs of abuse containing 3,4-methylenedioxymethamphetamine (MDMA). Recently, the trafficking of ecstasy tablets has grown and considerable higher amounts have been seized in Brazil. Herein, we present the development and validation of a 1H-qNMR (quantitative nuclear magnetic resonance of hydrogen) analytical forensic method capable both to identify and quantify MDMA in ecstasy tablets. Details are presented in the Article A Validated NMR Approach for MDMA Quantification in Ecstasy Tablets by Nathalia S. Almeida, Luiz E. C. Benedito, Adriano O. Maldaner and Aline L. de Oliveira on page 1944.


Cover Article
J. Braz. Chem. Soc. 2018, 29(9), 1944-1950

A Validated NMR Approach for MDMA Quantification in Ecstasy Tablets

Nathalia S. Almeida; Luiz E. C. Benedito; Adriano O. Maldaner; Aline L. de Oliveira

How to cite this article

Ecstasy is a term typically used to describe drugs of abuse containing 3,4-methylenedioxymethamphetamine (MDMA). Recently, the trafficking of ecstasy tablets has grown and considerable higher amounts have been seized in Brazil. Herein, we present the development and validation of a 1H-qNMR (quantitative nuclear magnetic resonance of hydrogen) analytical forensic method capable both to identify and quantify MDMA in ecstasy tablets. Details are presented in the Article A Validated NMR Approach for MDMA Quantification in Ecstasy Tablets by Nathalia S. Almeida, Luiz E. C. Benedito, Adriano O. Maldaner and Aline L. de Oliveira on page 1944.

http://dx.doi.org/10.21577/0103-5053.20180071

Published online: April 3, 2018

Communication J. Braz. Chem. Soc. 2018, 29(9), 1777-1785

An Efficient Method for the Hydrolysis of Potassium Organotrifluoroborates Promoted by Montmorillonite K10

Renato L. Silva; Cosme S. Santos; Jonh A. M. Santos; Roberta A. Oliveira; Paulo H. Menezes; Juliano C. R. Freitas

How to cite this article

 

An efficient and non-expensive method for conversion of diverse potassium organotrifluoroborates to their corresponding boronic acids and boronic esters promoted by montmorillonite K10 using water as the reaction solvent is described.

http://dx.doi.org/10.21577/0103-5053.20180126

Published online: June 26, 2018


Articles J. Braz. Chem. Soc. 2018, 29(9), 1786-1795

In vitro Analysis of the Interaction between Human Serum Albumin and Semi‑Synthetic Clerodanes

Otávio A. Chaves; Áurea Echevarria; Andressa Esteves-Souza; Maria A. M. Maciel; José C. Netto-Ferreira

How to cite this article

 

The interaction between human serum albumin (HSA) and semi-synthetic clerodanes showing potential anti-cancer activity was evaluated by experimental and theoretical methods. The clerodanes derived from trans-dehydrocrotonin (t-DCTN), methyl-hydrazone (MHDCTN) and phenyl-hydrazone (PHDCTN), showed better binding ability than the natural product t-DCTN.

http://dx.doi.org/10.21577/0103-5053.20180054

Published online: March 19, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1796-1802

Determination of Colchicine in Pharmaceutical Formulations and Urine by Multiple-Pulse Amperometric Detection in an FIA System Using Boron-Doped Diamond Electrode

Débora A. R. Moreira; Fernando M. de Oliveira; Dilton M. Pimentel; Tiago J. Guedes; Rita C. S. Luz; Flávio S. Damos; Arnaldo C. Pereira; Rodrigo A. B. da Silva; Wallans T. P. dos Santos

How to cite this article

 

Selective, simple and fast determination of colchicine by multiple pulse amperometry coupled to flow injection analysis (FIA-MPA) system in pharmaceutical formulations and urine samples using a boron-doped diamond electrode.

http://dx.doi.org/10.21577/0103-5053.20180055

Published online: March 20, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1803-1810

Microstructure by Thermal Attack under Vacuum of a Superduplex Stainless Steels and Electrochemical Behavior in H2S/CO2-Saturated Synthetic Seawater

Elki C. Souza; Carlos A. Fortulan; João M. D. A. Rollo

How to cite this article

 

Superduplex stainless steels composed in both equal fraction ferritic-austenite phases are applied as components for use in petrochemical industries in off-shore platforms and its corrosion resistance (due to the passive film on the surface) is dependent on the temperature and environment in which they are exposed.

http://dx.doi.org/10.21577/0103-5053.20180056

Published online: March 20, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1811-1822

Palladium Nanoparticles within Core-Cross-Linked Polymer Gels for Suzuki Coupling Reactions: from Monomers to Ready-to-Use Catalysts in Two-Steps

Tanize Bortolotto; Gabrielly E. Neumann; Suelen G. Trindade; Laura C. E. da Silva; Oscar E. D. Rodrigues; Vanessa Schmidt; Cristiano Giacomelli

How to cite this article

 

Well-defined cross-linked polymeric structures behaving as highly hydrated unimolecular objects (polymer nanogels) are suitable capping agents for palladium nanoparticle catalyst systems. This structurally complex catalyst composite can be prepared in two-steps.

http://dx.doi.org/10.21577/0103-5053.20180057

Published online: March 20, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1823-1829

Solid State Reaction of Serpentinite Mg3Si2O5(OH)4 with NaOH to Produce a New Basic Catalytic Phase Na2Mg2Si2O7 for Biodiesel Production

Gilvan M. Paz; Sara S. Vieira; Alexandre C. Bertoli; Fabiane C. Ballotin; Edmilson M. de Moura; Ana Paula C. Teixeira; Demétrio A. S. Costa; Ottávio Carmignano; Rochel M. Lago

How to cite this article

 

The nature of the catalytic site is not clear, but one can consider that in the Na2Mg2Si2O7 structure is forming a species Si−O-Na+. One possible mechanism is the interaction of CH3OH with the basic site Si−O-Na+.

http://dx.doi.org/10.21577/0103-5053.20180058

Published online: March 21, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1830-1841

Optimization of Experimental Parameters in Analysis of Pharmaceutical Pellets by Near Infrared-Chemical Imaging (NIR-CI) and Multivariate Curve Resolution with Alternating Least Squares (MCR-ALS)

José Augusto Da-Col; Ronei J. Poppi

How to cite this article

 

In this study, the evaluation of multivariate curve resolution with alternating least squares (MCR-ALS) parameters was important for the analysis results of pharmaceutical pellets composition.

http://dx.doi.org/10.21577/0103-5053.20180059

Published online: March 22, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1842-1853

Supramolecular Characterization of Humic Acids Obtained through the Bacterial Transformation of a Low Rank Coal

Nelson O. Valero; Liliana C. Gómez; Luz M. Melgarejo

How to cite this article

 

The characterization of humic acid (HA) obtained by activity of bacterial strains, that transform a low rank coal (LRC) lignite type and release humified organic matter (HOM), was compared with HA obtained by the traditional alkaline extraction method using 0.5 M NaOH (HA-NaOH).

http://dx.doi.org/10.21577/0103-5053.20180060

Published online: March 22, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1854-1865

Seasonal and Spatial Distribution of Caffeine, Atrazine, Atenolol and DEET in Surface and Drinking Waters from the Brazilian Federal District

Fernando F. Sodré; Joyce S. Santana; Thiago R. Sampaio; Cristina C. S. Brandão

How to cite this article

 

This work shows the distribution of selected micropollutants in Paranoá Lake that receives effluents from the capital of Brazil and will be used to produce drinking water in order to avoid water scarcity. Source and drinking waters were also investigated.

http://dx.doi.org/10.21577/0103-5053.20180061

Published online: March 22, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1866-1875

Volatile Profile of Sparkling Wines Produced with the Addition of Mannoproteins or Lees before Second Fermentation Performed with Free and Immobilized Yeasts

Gustavo P. Costa; Karine P. Nicolli; Juliane E. Welke; Vitor Manfroi; Claudia A. Zini

How to cite this article

 

The use of immobilized yeasts and aging on mannoproteins or lees seemed to be a promising treatment to achieve positive aroma notes in the volatile profile of sparkling wines.

http://dx.doi.org/10.21577/0103-5053.20180062

Published online: March 23, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1876-1884

Immobilization of Burkholderia cepacia on Pristine or Functionalized Multi‑Walled Carbon Nanotubes and Application on Enzymatic Resolution of (RS)‑1‑Phenylethanol

Michele R. G. Dias; Alysson de Pauloveloso; Lilian F. M. do Amaral; Rhaísa T. Betim; Maria G. Nascimento; Cristiane Pilissão

How to cite this article

 

The systems Burkholderia cepacia lipase (BCL) on pristine or functionalized multi-walled carbon nanotubes (MWCNTs) resulted in a 3-fold improvement in the conversion and in a 5-fold improvement in ees (enantiomeric excess of the substrate), when compared with free BCL. The support was reused for eight cycles. An increase in the thermal stability of BCL was confirmed by thermogravimetric analysis (TGA).

http://dx.doi.org/10.21577/0103-5053.20180063

Published online: March 23, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1885-1893

Application of Factorial Design and Desirability Function to Develop a Single Analytical Procedure for the Determination of Metals in Different Tissues of Blue Crab (Callinectes danae)

Daniel C. Lima; Wesley N. Guedes; Vinicius C. Costa; Fábio A. C. Amorim

How to cite this article

 

Graphical abstract shows the three studied tissues, the sequence of scientific work with relation to the investigation on single condition to prepare samples, analytical features, validation of analytical procedure and application.

http://dx.doi.org/10.21577/0103-5053.20180064

Published online: March 27, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1894-1903

Synthesis and Optimization of Colloidal Hydroxyapatite Nanoparticles by Hydrothermal Processes

Thaís M. Arantes; Lílian M. M. Coimbra; Fernando H. Cristovan; Tatiane M. Arantes; Gabriel M. Rosa; Luciano M. Lião

How to cite this article

 

The smaller nanoparticles aggregate to form the nanorods by growth via the targeted binding mechanism.

http://dx.doi.org/10.21577/0103-5053.20180065

Published online: March 27, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1904-1916

Direct Synthesis of Porous Carbon Materials Prepared from Diethyldithiocarbamate Metal Complexes and Their Electrochemical Behavior

Herculano V. da Silva; Arilza O. Porto; Cristiano C. Caliman; Rubens L. de Freitas Filho; Alexandre A. C. Cotta; Waldemar A. A. Macedo; Ana Paula C. Teixeira

How to cite this article

 

Porous carbon materials were prepared from Fe, Co and Ni diethyldithiocarbamate complexes. The effect of metallic center in the morphology of porous carbon structure and the electrochemical behavior of porous carbon materials were studied.

http://dx.doi.org/10.21577/0103-5053.20180066

Published online: March 28, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1917-1926

Degradation of Aqueous Paraquat by Surface Air Plasma: A Kinetic Study

Camilo Fabris; Gabriele B. Baroncello; Péricles I. Khalaf

How to cite this article

 

The graphical abstract schematically shows the surface air plasma setup for aqueous paraquat degradation. The production of reactive nitrogen species (RNS) and the ionic strength effect on paraquat degradations are shown in detail on the graphs.

http://dx.doi.org/10.21577/0103-5053.20180067

Published online: March 28, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1927-1933

Improving Antioxidant Activity of Ophioglossum thermale Kom. by Fermentation with Talaromyces purpurogenus M18-11

Jian-wei Dong; Le Cai; Xue-jiao Li; Rui-feng Mei; Ping Luo; Zhong‑tao Ding

How to cite this article

 

Ophioglossum thermale Kom. was fermented with Talaromyces purpurogenus M18-11. T. purpurogenus is an effective strain to process O. thermale for improving the antioxidant activity.

http://dx.doi.org/10.21577/0103-5053.20180068

Published online: April 2, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1934-1943

Burkholderia thailandensis: the Main Bacteria Biodegrading Fipronil in Fertilized Soil with Assessment by a QuEChERS/GC-MS Method

Luciana T. D. Cappelini; Juliana V. Alberice; Patrícia F. M. Eugênio; Eloisa Pozzi; Ana Carolina Urbaczek; Lia G. R. Diniz; Elma N. V. M. Carrilho; Emanuel Carrilho; Eny M. Vieira

How to cite this article

 

A QuEChERS/GC-MS method was essential to quantitate the biological degradation of fipronil in soil fertilized with humic substances. We isolated more than two-dozens of microorganisms from such soil, and the most abundant, Burkholderia thailandensis, showed the capability to degrade fipronil into active metabolites.

http://dx.doi.org/10.21577/0103-5053.20180069

Published online: April 2, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1944-1950

A Validated NMR Approach for MDMA Quantification in Ecstasy Tablets

Nathalia S. Almeida; Luiz E. C. Benedito; Adriano O. Maldaner; Aline L. de Oliveira

How to cite this article

 

An internal standard 1H-qNMR (quantitative nuclear magnetic resonance) method was developed and validated for simple, accurate and fast quantification of 3,4-methylenedioxymethamphetamine (MDMA) in seized ecstasy tablets.

http://dx.doi.org/10.21577/0103-5053.20180071

Published online: April 3, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1951-1958

The Chemical Composition of Winter Fogs at São Paulo Highway Sites

Pérola C. Vasconcellos; Fábio L. T. Gonçalves; Simone G. Avila; Vitor K. Censon; Heidi Bauer

How to cite this article

 

Fog sampler, an equipment used to collect fog samples at 2 roads in São Paulo City. Collected droplets coalesce and run down the strands, aided by gravity and aerodynamic drag, into a Teflon® sample trough.

http://dx.doi.org/10.21577/0103-5053.20180072

Published online: April 3, 2018

J. Braz. Chem. Soc. 2018, 29(9), 1959-1964

Sub-Minute Method for Determination of Naphazoline in the Presence of Diphenhydramine, Pheniramine or Chlorpheniramine by Capillary Electrophoresis

Michelle M. A. C. Ribeiro; Mariana C. Marra; Brenda M. C. Costa; Thiago C. Oliveira; Alex D. Batista; Rodrigo A. A. Muñoz; Eduardo M. Richter

How to cite this article

 

This work presents a simple and low-cost capillary electrophoresis (CE) method for ultra-fast (< 1 min) simultaneous determination of naphazoline in the presence of diphenhydramine or pheniramine or chlorpheniramine.

http://dx.doi.org/10.21577/0103-5053.20180073

Published online: April 3, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1965-1972

Surface Modification of Poly(GMA-co-EDMA-co-MMA) with Resorcarenes

Alver A. Castillo-Aguirre; Betty A. Velásquez-Silva; Cindy Palacio; Frank Baez; Zuly J. Rivera-Monroy; Mauricio Maldonado

How to cite this article

 

Regioselective modification of poly(2,3-epoxypropyl methacrylate-co-ethylene glycol dimethacrylate-co-methyl methacrylate) (poly(GMA-co-EDMA-co-MMA)) with resorcarenes.

http://dx.doi.org/10.21577/0103-5053.20180074

Published online: April 10, 2018


J. Braz. Chem. Soc. 2018, 29(9), 1973-1979

Optimization and Validation of an Extraction Method for Evaluating the Availability of Cu, Zn, Mn, Ni, Cr and Cd in Soil with the Use of the Mehlich-1 Extractor

Gesiara F. Silva; Marília B. Galuch; Alessandro F. Martins; Danielle G. O. Prado; Jesuí V. Visentainer; Elton G. Bonafé

How to cite this article

 

Determination of the total amount of heavy metals present in soils is not a good index to estimate the bioavailability and toxicity of these elements. This work describes the use of the Mehlich-1 extractor for evaluating the availability of Cu, Zn, Mn, Ni, Cr and Cd in soil.

http://dx.doi.org/10.21577/0103-5053.20180075

Published online: April 10, 2018

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
JBCS Editorial and Publishing Office
University of Campinas - UNICAMP
13083-970 Campinas-SP, Brazil

Tel/Fax: +55.19.3521.3151
Free access

GN1