JBCS

1:29, Tue Jul 26

Current Issue vol. 27, No. 7, 2016, p. 1137-1318

 

On Top of a Mining Disaster, Coping with Ethical Issues

Six months ago, the collapse of a mining dam flooded the village of Bento Rodrigues in the State of Minas Gerais, causing the death of 19 people, and transforming more than 700 km of rivers, which were the primary source of water and food for several communities, in a "sea" of red mud. Samarco Mineração SA, a joint venture between mining giants Australian-based BHP Billiton Ltd. and Vale S.A., operates the Fe ore extraction and the dams of Fundão, Germano and Santarém in the State of Minas Gerais, Brazil. It has been estimated that more than 40 million m3 of mining residues slid down a mountainside when Fundão tailing dam failed. At least 1,500 ha of natural reserves (Rio Doce State Park, Sete Salões State Park, and Goytacazes National Forest), and Krenak indigenous land were adversely impacted.

(Read more at Editorial)


Cover Article
J. Braz. Chem. Soc. 2016, 27(7), 1139-1149

Nanobiotechnology Solutions against Aedes aegypti

Nelson Durán; German A. Islan; Marcela Durán; Guillermo R. Castro

How to cite this article

Nanocarriers acting on Aedes aegypti could be a new strategy to new nanomaterials as insecticide and/or as antivirals, as described on this review. Details are presented in the Review Nanobiotechnology Solutions against Aedes aegypti by Nelson Durán, German A. Islan, Marcela Durán and Guillermo R. Castro on page 1139.

http://dx.doi.org/10.5935/0103-5053.20160122

Published online: April 20, 2016

Editorial J. Braz. Chem. Soc. 2016, 27(7), 1137-1138

On Top of a Mining Disaster, Coping with Ethical Issues

Vanessa Hatje

How to cite this article

 

http://dx.doi.org/10.5935/0103-5053.20160190


Review J. Braz. Chem. Soc. 2016, 27(7), 1139-1149

Nanobiotechnology Solutions against Aedes aegypti

Nelson Durán; German A. Islan; Marcela Durán; Guillermo R. Castro

How to cite this article

 

Nanostructures such as liposomes, solid lipid nanoparticles, nanoemulsions, polymeric nanoparticles, metallic nanoparticles, carbon dots and carbon nanotubes appeared as important nanocarriers acting on Aedes aegypti control. Some of them have effective antiviral properties that open a new strategy for mosquito control.

http://dx.doi.org/10.5935/0103-5053.20160122

Published online: April 20, 2016

Articles J. Braz. Chem. Soc. 2016, 27(7), 1150-1156

Facile and Efficient Synthesis of [18F]Fluoromisonidazole Using Novel 2-Nitroimidazole Derivatives

Young-Do Kwon; Yongju Jung; Seok Tae Lim; Myung-Hee Sohn; Hee-Kwon Kim

How to cite this article

 

Synthesis of [18F]fluoromisonidazole ([18F]FMISO) using novel precursors prepared from 2,2-dimethyl-1,3-dioxolane-4-methanol was achieved.

http://dx.doi.org/10.5935/0103-5053.20160010

Published online: January 20, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1157-1164

Synthesis, Characterization and in vitro Antioxidant Activity of New Chiral N-boc Organotellurium Compounds, (CH3)3OC(O)NHCH(R)C(O)NHCH2-CH2Te-C6H4-4-OCH3, Containing Carbamate and Peptide Groups

Rajegowda H. Revanna; Raghavendra K. Panchangam; Udaya Bhanu; Suresh Doddavenkatanna

How to cite this article

 

Synthesis, analytical and spectroscopic characterization and in-vitro antioxidant activity of chiral N-boc organotellurium compounds containing carbamate and peptide groups derived from L-N-boc amino acids and organotellurated amine is reported here.

http://dx.doi.org/10.5935/0103-5053.20160011

Published online: January 20, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1165-1176

Pesticide Residues Method Validation by UPLC-MS/MS for Accreditation Purposes

Ionara R. Pizzutti; Jonatan V. Dias; André de Kok; Carmem D. Cardoso; Giovana M. E. Vela

How to cite this article

 

Accreditation is a way to demonstrate the technical competence through reliable results achieved from validated scope. A multi-residue method was developed to determine pesticides residues in tomato in order to demonstrate the laboratory ability and conformity with the NBR ISO/IEC 17025:2005 norm.

http://dx.doi.org/10.5935/0103-5053.20160012

Published online: January 20, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1177-1187

An Active Search Method for Finding Objects with Near-Optimal Property Values within a Given Set

Cláudia E. da Matta; Henrique M. Paiva; Roberto K. H. Galvão; Mário C. U. Araújo; Sófacles F. C. Soares; Karen C. Weber; Luiz A. Pinto

How to cite this article

 

Active search method aimed at finding objects with optimal or near-optimal y-property values on the basis of x-variables obtained by indirect, less costly methods.

http://dx.doi.org/10.5935/0103-5053.20160014

Published online: January 20, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1188-1194

Optimization of a New Methodology for Determination of Total Phenolic Content in Rice Employing Fast Blue BB and QUENCHER Procedure

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

How to cite this article

 

Optimization of a new method for specific determination of total phenolic compounds through direct QUENCHER procedure paired with Fast Blue BB reagent.

http://dx.doi.org/10.5935/0103-5053.20160013

Published online: January 21, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1195-1201

Contribution of Irradiation and Dihydroxybenzenes on Iron(III) Reduction in Fenton Process

Beatriz Costa e Silva; Raquel F. P. Nogueira

How to cite this article

 

Hydroquinone and catechol are very effective for FeIII reduction, however higher mineralization is obtained under irradiation of either complexed or free iron.

http://dx.doi.org/10.5935/0103-5053.20160015

Published online: January 25, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1202-1216

The 1,3-Dipolar Cycloaddition of Nitrile Oxide to Vinylacetic Acid: Computational Study of Transition States Selectivity, Solvent Effects, and Bicyclo Formation

Josene M. Toldo; Aloir A. Merlo; Paulo F. B. Gonçalves

How to cite this article

 

Computational study of the reaction mechanism of two successive [3 + 2] 1,3-dipolar cycloaddition reactions involving benzonitrile oxide give rise to a bicycle.

http://dx.doi.org/10.5935/0103-5053.20160016

Published online: January 25, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1217-1228

Synthesis and Antitrypanosomastid Activity of 1,4-Diaryl-1,2,3-triazole Analogues of Neolignans Veraguensin, Grandisin and Machilin G

Tatiana B. Cassamale; Eduarda C. Costa; Diego B. Carvalho; Nadla S. Cassemiro; Carolina C. Tomazela; Maria C. S. Marques; Mariáh Ojeda; Maria F. C. Matos; Sérgio Albuquerque; Carla C. P. Arruda; Adriano C. M. Baroni

How to cite this article

 

In this work, sixteen 1,4-diaryl-1,2,3-triazole analogues of neolignans veraguensin, grandisin and machilin G were synthesized, and biological activity was evaluated for antitripanosomastid against Leishmania amazonensis, Leishmania infantum and Trypanosoma cruzi.

http://dx.doi.org/10.5935/0103-5053.20160017

Published online: January 25, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1229-1235

An Evaluation of the Use of Formic Acid for Extraction of Trace Elements from Brazil Nut and Babassu Coconut and Its Suitability for Multi-Element Determination by ICP-MS

Gisele S. Lopes; Francisco L. F. Silva; Patricia Grinberg; Ralph E. Sturgeon

How to cite this article

 

Evaluation of formic acid as an extraction medium for characterizing trace elements in whole nut, oil and defatted fractions of Brazil nut and babassu coconut by inductively coupled plasma mass spectrometry (ICP-MS).

http://dx.doi.org/10.5935/0103-5053.20160018

Published online: January 26, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1236-1244

Synthesis and Anti-Staphylococcal Activity of 2,4-Disubstituted Diphenylamines

Ramandeep K. Mehton; Vineet Meshram; Sanjai Saxena; Manmohan Chhibber

How to cite this article

 

Diphenyl amines were synthesized using an efficient procedure and evaluated for their in vitro anti-bacterial activity against eight standard Gram-positive and Gram-negative strains. Most of the synthesized compounds displayed good anti-Staphylococcal activity. Potential compounds were further evaluated against resistant strains of Staphylococcus aureus. Compounds 2-(2,4-dinitrophenylamino)-phenol and 2-(2-nitrophenylamino)-phenol demonstrated promising results in initial studies.

http://dx.doi.org/10.5935/0103-5053.20160020

Published online: January 27, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1245-1253

Preparation of Derivatives of Betulinic Acid, Steviol and Isosteviol and Evaluation of Antitrypanosomal and Antimalarial Activities

Asad Ullah; Leopoldo C. Baratto; Renata C. Paula; Luz Helena V. Silva; Maurilio J. Soares; Brás H. Oliveira

How to cite this article

 

Derivatives of betulinic acid, steviol and isosteviol were prepared and tested in vitro against Plasmodium falciparum and Trypanosoma cruzi. Dinitrophenylhydrazone derivatives of betulinic acid were the most active antiplasmodium compounds whereas the oxime of isosteviol was the most active against T. cruzi.

http://dx.doi.org/10.5935/0103-5053.20160021

Published online: January 27, 2016


J. Braz. Chem. Soc. 2016, 27(7), 1254-1263

Chemometric Analysis of UV Characteristic Profile and Infrared Fingerprint Variations of Coffea arabica Green Beans under Different Space Management Treatments

Amélia E. Terrile; Gustavo G. Marcheafave; Guilherme S. Oliveira; Miroslava Rakocevic; Roy E. Bruns; Ieda S. Scarminio

How to cite this article

 

Ultraviolet (UV) characteristic profiles and Fourier transform infrared (FTIR) spectroscopic fingerprints of green bean extracts of Coffea arabica L., cultivated in two planting patterns and at two different densities, were analyzed with principal component and hierarchical cluster analyses. The results show that chlorogenic acids and caffeine differentiated the UV and FTIR fingerprints of these treatments.

http://dx.doi.org/10.5935/0103-5053.20160022

Published online: January 27, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1264-1272

Simultaneous Voltammetric Determination of Antihypertensive Drugs Amlodipine and Atenolol in Pharmaceuticals Using a Cathodically Pretreated Boron-Doped Diamond Electrode

Jaqueline T. Moraes; Ana P. P. Eisele; Carlos A. R. Salamanca-Neto; Jessica Scremin; Elen R. Sartori

How to cite this article

 

A simple and sensitive electroanalytical method for the simultaneous determination of amlodipine besylate and atenolol is reported for the first time. Square-wave voltammetry along with a cathodically pretreated boron-doped diamond electrode were used in this new procedure.

http://dx.doi.org/10.5935/0103-5053.20160023

Published online: January 27, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1273-1278

Strategy of Sample Preparation for Arsenic Determination in Mineral Fertilizers

Raquel C. Machado; Edenir R. Pereira-Filho; Ana Rita A. Nogueira

How to cite this article

 

Sample preparation based on diluted acid and digester block with perfluoroalkoxy (PFA) tubes for arsenic determination in mineral fertilizers by continuous flow hydride generation atomic absorption spectrometry (CF-HG-AAS).

http://dx.doi.org/10.5935/0103-5053.20160024

Published online: January 27, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1279-1289

Synthesis and Characterization of Nanopore MoVI-Imprinted Polymer and Its Application as Solid Phase for Extraction, Separation and Preconcentration of Molybdenum Ions from Water Samples

Fatemeh Ardestani; Majid Haji Hosseini; Majid Taghizadeh; Mohammad Reza Pourjavid; Mohammad Rezaee

How to cite this article

 

Schematic representation of the preparation process of Mo-ion imprinted polymer and conditioning that consists of passing 20 mL deionized water at a flow rate of 1.5 mL min-1. Sample adsorption in column: 35 mL of the sample was passed through the column at flow rate of 1.5 mL min-1. Elution: washing with 7 mL distilled water at a flow rate of 1.5 mL min-1.

http://dx.doi.org/10.5935/0103-5053.20160026

Published online: January 28, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1290-1296

Easy Method for Removal of Cyanogens from Cassava Leaves with Retention of Vitamins and Omega-3 Fatty Acids

Iasmine G. Pereira; Julianna M. Vagula; Denis F. Marchi; Carlos E. Barão; Gleice R. S. Almeida; Jesuí V. Visentainer; Swami A. Maruyama; Oscar O. Santos Júnior

How to cite this article

 

Through the combination of temperature and time, low heating, and response surface methodology, a new cyanide elimination method for cassava leaves was developed with focus on reducing elimination time while avoiding substantial losses of omega-3 fatty acids and β-carotene.

http://dx.doi.org/10.5935/0103-5053.20160027

Published online: January 29, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1297-1304

Self-Immobilization of Poly(methyltetradecylsiloxane) onto Metalized Silica Particles as Stationary Phases for HPLC

Giselle O. Carvalho; Carol H. Collins; Anizio M. Faria

How to cite this article

 

Self-immobilization of a pre-synthesized organic polymer on metalized silica particles and their potential use as efficient and chemically stable stationary phases for reversed-phase liquid chromatography (RP-LC).

http://dx.doi.org/10.5935/0103-5053.20160028

Published online: January 29, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1305-1310

Energy Dispersive X-Ray Fluorescence Profile of Some Brazilian Postage Stamps

Nicolas V. Schwab; José Augusto Da-Col; Peter Meyer; Maria I. M. S. Bueno; Marcos N. Eberlin

How to cite this article

 

Energy dispersive X-ray fluorescence analysis of postage stamps printed in Brazil between 1850-1922 for the study of elementary profile and detection of counterfeit samples.

http://dx.doi.org/10.5935/0103-5053.20160029

Published online: January 29, 2016

J. Braz. Chem. Soc. 2016, 27(7), 1311-1318

Structural Model and De-Intercalation Kinetics of Kaolinite-Methanol-Sodium Stearate Intercalation Compound

Sen Wang; Xiaochao Zuo; Hongfei Cheng; Yongjie Yang; Qinfu Liu

How to cite this article

 

Ka-MeOH-SS was synthesized via intercalation and displacement of kaolinite with DMSO, methanol and sodium stearate.

http://dx.doi.org/10.5935/0103-5053.20160136

Published online: May 5, 2016

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