JBCS

7:19, Mon Aug 20

Open Access/APCs

Forthcoming Papers - 2018

Articles published online ahead of print




Articles J. Braz. Chem. Soc. 2018

Influence of Copper and Metallic Alloys on the Oxidation Reaction of Commercial Biodiesel in Mixture with Natural Antioxidant

Letícia T. Chendynski; Érica S. Romagnoli; Ana Carolina G. Mantovani; Marissa Kimura; Leonardo C. Marques; Dionisio Borsato

Influence of copper and metallic alloys on the biodiesel oxidation reaction.

http://dx.doi.org/10.21577/0103-5053.20180157

Published online: August 17, 2018.

J. Braz. Chem. Soc. 2018

Synthesis, Photophysical and Electrochemical Properties of Novel D-π-D and D-π-A Triphenylamino-Chalcones and β-Arylchalcones

Rafaela G. M. da Costa; Francisco R. L. Farias; Luis Maqueira; Carlos Castanho Neto; Leonardo S. A. Carneiro; Joseany M. S. Almeida; Camilla D. Buarque; Ricardo Q. Aucélio; Jones Limberger

A series of triphenylamino (TPA)-chalcones and β-arylchalcones, displaying either D-π-D or D-π-A architecture, were synthesized and characterized. Photophysical and electrochemical properties of these compounds were evaluated.

http://dx.doi.org/10.21577/0103-5053.20180156

Published online: August 17, 2018.


Communication J. Braz. Chem. Soc. 2018

Old Drawback on Azlactone Formation Revealed by a Combination of Theoretical and Experimental Studies

Pedro P. de Castro; Gabriel M. F. Batista; Danielle L. J. Pinheiro; Hélio F. dos Santos; Giovanni W. Amarante

Novel insights in the formation of different 2-substituted azlactone heterocycles. The formation of 2-aryl and 2-alkyl azlactones are favored by a sum of both kinetic and thermodynamic factors, while the cyclization of 2-alcoxy azlactones is less favored.

http://dx.doi.org/10.21577/0103-5053.20180155

Published online: August 16, 2018.


Articles J. Braz. Chem. Soc. 2018

Occurrence of Pesticides and PPCPs in Surface and Drinking Water in Southern Brazil: Data on 4-Year Monitoring

Sergiane S. Caldas; Jean Lucas O. Arias; Caroline Rombaldi; Lucas L. Mello; Maristela B. R. Cerqueira; Ayrton F. Martins; Ednei G. Primel

Fifty-one compounds including PPCPs and pesticides were monitored from 2011 to 2014 in drinking and surface waters in Rio Grande do Sul State.

http://dx.doi.org/10.21577/0103-5053.20180154

Published online: August 15, 2018.


Short Report J. Braz. Chem. Soc. 2018

A Facile Synthesis of Novel Isatinspirooxazine Derivatives and Potential in vitro Anti-Proliferative Activity

Iara S. Santos; Fabiana S. Guerra; Lucas F. Bernardino; Patrícia D. Fernandes; Lidilhone Hamerski; Bárbara V. Silva

It was synthesized a new isatinspirooxazine derivative with an half maximal inhibitory concentration (IC50) = 0.34 µM, more potent than the reference drug, doxorubicin (IC50 = 1.88 µM), in breast cancer line MDA-MB231.

http://dx.doi.org/10.21577/0103-5053.20180153

Published online: August 15, 2018.


Articles J. Braz. Chem. Soc. 2018

Analysis of Isomeric Cannabinoid Standards and Cannabis Products by UPLC-ESI-TWIM-MS: a Comparison with GC-MS and GC × GC-QMS

Nayara A. dos Santos; Lilian V. Tose; Samantha R. C. da Silva; Michael Murgu; Ricardo M. Kuster; Rafael S. Ortiz; Flavio A. O. Camargo; Boniek G. Vaz; Valdemar Lacerda Jr.; Wanderson Romão

Analysis of cannabinoid standards by ultra performance liquid chromatography coupled with electrospray ionization-quadrupole-time of flight-mass spectrometry (UPLC-ESI-QTOF-MS) and UPLC-ESI-travelling wave ion mobility (TWIM)-MS.

http://dx.doi.org/10.21577/0103-5053.20180152

Published online: August 14, 2018.


J. Braz. Chem. Soc. 2018

Determination of Parabens in Breast Milk Samples by Dispersive Liquid-Liquid Microextraction (DLLME) and Ultra-High-Performance Liquid Chromatography Tandem Mass Spectrometry

Caroline F. Grecco; Israel D. Souza; Vinicius R. Acquaro Junior; Maria E. C. Queiroz

Determination of parabens in breast milk samples by dispersive liquid-liquid microextraction (DLLME) and ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS).

http://dx.doi.org/10.21577/0103-5053.20180151

Published online: August 10, 2018.

J. Braz. Chem. Soc. 2018

Pyrazolyl-Tetrazoles and Imidazolyl-Pyrazoles as Potential Anticoagulants and their Integrated Multiplex Analysis Virtual Screening

André L. P. G. Lourenço; Percilene F. Vegi; Jéssica V. Faria; Gustavo S. P. Pinto; Maurício S. dos Santos; Plínio C. Sathler; Max S. Saito; Marcos Santana; Tatiana P. P. Dutra; Carlos R. Rodrigues; Robson Q. Monteiro; Alice M. R. Bernardino; Helena C. Castro

Fourteen pyrazole compounds were synthesized and evaluated with regard to anticoagulant and antithrombotic activities. These derivatives were investigated through an integrated multiplex analysis virtual screening (IMA-VS) pipeline.

http://dx.doi.org/10.21577/0103-5053.20180150

Published online: August 9, 2018.


J. Braz. Chem. Soc. 2018

Synthesis of Spiro-Pyrrolidinyloxindoles by Oxidative Rearrangement of N-Acyltetrahydro-β-carbolines Using an Oxone/Aqueous Acetone Mixture

Luisa L. Marçal; Simon J. Garden

Substrate face controlled concerted oxidative rearrangement of N-acyltetrahydro-β-carbolines stereoselectively gives spiropyrrolidinyloxindoles.

http://dx.doi.org/10.21577/0103-5053.20180149

Published online: August 9, 2018.


Short Report J. Braz. Chem. Soc. 2018

Synthesis, in silico Study and Antimicrobial Evaluation of New Selenoglycolicamides

Helivaldo D. S. Souza; Roxana P. F. de Sousa; Bruno F. Lira; Raquel F. Vilela; Nathalie H. P. B. Borges; José P. de Siqueira‑Junior; Edeltrudes O. Lima; Jeane U. G. Jardim; Gracielle A. T. da Silva; José M. Barbosa‑Filho; Petrônio F. de Athayde‑Filho

The organoselenium compounds presented are prominent in medicinal chemistry; due to the increase of resistant fungi and bacteria, novel organoselenium compounds have been investigated as potent antimicrobials.

http://dx.doi.org/10.21577/0103-5053.20180148

Published online: August 6, 2018.


Review J. Braz. Chem. Soc. 2018

Deep Eutectic Solvents as Unconventional Media for Multicomponent Reactions

Luiz S. Longo Jr.; Marcus V. Craveiro

This review article describes the use of deep eutectic solvents (DES) as both solvent and/or catalyst in multicomponent reactions.

http://dx.doi.org/10.21577/0103-5053.20180147

Published online: August 2, 2018.

Articles J. Braz. Chem. Soc. 2018

Synthesis and Cytotoxicity Evaluation of a Series of 3-Alkenyl-2-Hydroxy-1,4‑Naphthoquinones Obtained by an Efficient Knoevenagel Condensation

Cibelle C. David; Antonio C. S. Lins; Tania M. S. Silva; Júlia F. Campos; Teresinha G. Silva; Gardenia C. G. Militão; Celso A. Camara

An efficient Knoevenagel condensation between aldehydes and lawsone was performed under new conditions showing good isolated yields in a short reaction time and simple conditions.

http://dx.doi.org/10.21577/0103-5053.20180146

Published online: July 31, 2018.


J. Braz. Chem. Soc. 2018

Unprecedented One-Pot Sequence for the Synthesis of Tetrahydroquinoline Alkaloids and Preliminary Evaluation of their Antibacterial Activity

Gaspar Diaz-Muñoz; Izabel L. Miranda; Suélen K. Sartori; Gabriel N. S. Dias; Markus Kohlhoff; Gislaine A. Purgato; Marisa A. N. Diaz

A novel one-pot sequence (in 2 or 3 steps) was developed for the synthesis of the tetrahydroquinoline alkaloids (±)-galipinine, (±)-cuspareine, (±)-galipeine and (±)-angustureine, and the derivative (±)-11-methoxy-5,6,6a,7,8,13-hexahydro-13a-aza-benzo[5,6]cyclohepta[1,2-a]naphthalene-12-ol from their respective Wittig adducts.

http://dx.doi.org/10.21577/0103-5053.20180145

Published online: July 30, 2018.


J. Braz. Chem. Soc. 2018

Preparation of Magnetoliposomes with a Green, Low-Cost, Fast and Scalable Methodology and Activity Study against S. aureus and C. freundii Bacterial Strains

Rosangela M. F. da Costa e Silva; Luciano R. S. Lara; Jorge L. López; Ângela L. Andrade; Junnia A. C. Oliveira; Jacqueline A. Takahashi; Henriete S. Vieira; Tulio Matencio; Humberto O. Stumpf; Rosana Z. Domingues

A novel methodology, fast, low-cost and scalable, without the use of organic solvents and with the dual use of soy lecithin to prepare stable magnetoliposomes (MGLs).

http://dx.doi.org/10.21577/0103-5053.20180144

Published online: July 30, 2018.


J. Braz. Chem. Soc. 2018

Identification of Fusarium oxysporum Fungus in Wheat Based on Chemical Markers and Qualitative GC-MS Test

Carlos E. R. Senes; Nayara C. Saldan; Willian F. Costa; Terezinha I. E. Svidzinski; Cláudio C. Oliveira

Fusarium oxysporum was cultivated in liquid and solid culture media. Using gas chromatography coupled to mass spectrometry (GC-MS), it was possible to identify secondary metabolites from liquid and solid culture media that can be used as chemical markers for this fungus.

http://dx.doi.org/10.21577/0103-5053.20180143

Published online: July 27, 2018.


J. Braz. Chem. Soc. 2018

Evaluation of the Chemical Composition of Dry Feeds for Dogs and Cats

Silvânio S. L. Costa; Ana C. L. Pereira; Elisangela A. Passos; José P. H. Alves; Carlos A. B. Garcia; Rennan G. O. Araujo

In this work, the mineral composition of dry feeds for cat and dog was determined and evaluated according to regulatory agencies.

http://dx.doi.org/10.21577/0103-5053.20180142

Published online: July 25, 2018.


Review J. Braz. Chem. Soc. 2018

Insights into Protein-Ionic Liquid Interactions Aiming at Macromolecule Delivery Systems

Liliam K. Harada; Jorge F. B. Pereira; Welida F. Campos; Erica C. Silva; Carla G. Moutinho; Marta M. D. C. Vila; José M. Oliveira Jr.; José A. Teixeira; Victor M. Balcão; Matthieu Tubino

Potential for application of ionic liquids in biomimetic drug delivery systems, due to their high compatibility with enzymes and other proteins, promotion of higher selectivities, faster reaction rates and greater enzyme stabilities in biocatalytic reactions, and providing a path for the structural and functional stabilization of protein entities.

http://dx.doi.org/10.21577/0103-5053.20180141

Published online: July 24, 2018.

Articles J. Braz. Chem. Soc. 2018

Synthesis and Evaluation of Biocide and Cetane Number Improver Additives for Biodiesel from Chemical Changes in Triacylglycerides

Kênia P. Costa; Stella F. do Valle; Thayana F. L. dos Santos; Ellen T. Rangel; Angelo C. Pinto; Paulo A. Z. Suarez; Michelle J. C. Rezende

Biocide candidates from chemical transformations in triacylglycerides were evaluated against microorganisms which have been isolated from biodiesel/diesel blends. Four nitrated derivatives presented fungicidal activity.

http://dx.doi.org/10.21577/0103-5053.20180140

Published online: July 20, 2018.


J. Braz. Chem. Soc. 2018

Identification Using Classification Analysis of Flunitrazepam in Necrophagous Larvae via Differential Pulse Voltammetry and Fluorescence Excitation-Emission Matrix (EEM) Spectroscopy

Leomir A. S. de Lima; Camilo L. M. Morais; Jéssica T. Jales; Renata A. Gama; Sherlan G. Lemos; Kássio M. G. Lima

Experimental procedure to obtain samples of fly larvae extract and subsequent analysis by differential pulse voltammetry with E / V vs. Ag/AgCl reference electrode and molecular fluorescence spectroscopy.

http://dx.doi.org/10.21577/0103-5053.20180139

Published online: July 18, 2018.

J. Braz. Chem. Soc. 2018

Evaluation of Benzene Derivatives Migration from Solid Residuals by Alternative Leaching Process Using HS‑SPME GC‑MS

Jocinei Dognini; Luiz A. S. Madureira

Alternative leaching process for the determination of benzene derivatives in petrochemical waste using headspace solid-phase micro-extraction gas chromatography-mass spectrometry (HS-SPME GC-MS).

http://dx.doi.org/10.21577/0103-5053.20180138

Published online: July 18, 2018.

J. Braz. Chem. Soc. 2018

Radon Levels in a Hospital in Niterói Municipality-RJ, Brazil

Camila R. Silva; Pedro P. Caldeira; Angela S. F. Nani; Emmanoel V. Silva-Filho

The radium present in the soil decays originating 222Rn, a gas with high mobility that diffuses to the surface through pores, fissures in the soil and by the groundwater.

http://dx.doi.org/10.21577/0103-5053.20180137

Published online: July 17, 2018.

J. Braz. Chem. Soc. 2018

Anti-Parasite and Cytotoxic Activities of Chloro and Bromo L-Tyrosine Derivatives

Manuel Pastrana Restrepo; Elkin Galeano Jaramillo; Alejandro Martínez Martínez; Ana Mesa Arango; Sara Robledo Restrepo

Bromo and chloro L-tyrosine derivatives actives against L. panamensis.

http://dx.doi.org/10.21577/0103-5053.20180136

Published online: July 16, 2018.


J. Braz. Chem. Soc. 2018

Virtual Screening for the Selection of New Candidates to Trypanosoma cruzi Farnesyl Pyrophosphate Synthase Inhibitors

Larissa M. Oliveira; Janay S. C. Araújo; David B. Costa Júnior; Manoelito C. dos Santos Junior; Aníbal F. Santos Júnior; Franco H. A. Leite

Virtual screening to select Trypanosoma cruzi farnesyl pyrophosphate synthase inhibitors.

http://dx.doi.org/10.21577/0103-5053.20180135

Published online: July 12, 2018.


Short Report J. Braz. Chem. Soc. 2018

Potential Antileishmanial Activity of 4-N-Acylhydrazone Pyrazolo[3,4-d]pyridazin-7-ones: Synthesis, in vitro Biological Evaluations and Computational Studies

Andrey P. Jacomini; Michael J. V. da Silva; Julia Poletto; Gessica M. Ribeiro; Jessica T. C. Yokoyama; Danielle L. Bidóia; Fávero R. Paula; Celso V. Nakamura; Maria Helena Sarragiotto; Fernanda A. Rosa

Synthesis of new series of pyrazolo[3,4-d]pyridazin-7-ones with antileishmanial activity and low toxicity against Leishmania amazonensis (strain WHOM/BR/75/JOSEFA), promastigote and amastigote forms.

http://dx.doi.org/10.21577/0103-5053.20180134

Published online: July 12, 2018.


Articles J. Braz. Chem. Soc. 2018

β-Enaminoesters as Novel Corrosion Inhibitors for Carbon Steel in Acidic Medium

Mariana F. L. P. Carlos; Arthur Valbon; Marcelo A. Neves; Margareth R. L. Santos; Aurea Echevarria

American Iron and Steel Institute (AISI) 1020 carbon steel in 0.5 mol L-1 HCl in absence (blank) and presence of 1 × 10-2 mol L-1 ethyl-(2Z)-3-[(2-phenylethyl)amino]but-2-enoate (EN1).

http://dx.doi.org/10.21577/0103-5053.20180133

Published online: July 11, 2018.

J. Braz. Chem. Soc. 2018

Pulp Mill Effluent Treatment Using Plasma Obtained by High Voltage Electrolysis

Alexsandro A. Matias; César Reis; Efraim L. Reis; Cláudio M. Silva; Odilaine I. C. Damasceno; Antônio A. Neves

The plasma is produced between two electrodes immersed in the pulp mill effluent, at 585 V and 200 mA, producing various types of reactive agents, that were used to breakdown diverse organic compounds.

http://dx.doi.org/10.21577/0103-5053.20180132

Published online: July 10, 2018.

J. Braz. Chem. Soc. 2018

Metabolite Fingerprinting and Profiling of the Medicinal Grass Eleusine indica Based on HPLC-DAD, UPLC-DAD-MS/MS and NMR Analyses

Evelyn M. C. Peñaloza; Livia M. Casanova; Ivana C. R. Leal; Paula F. de Aguiar; Sônia S. Costa

Crude aqueous extracts of aerial and underground parts of Eleusine indica populations from four different localities were analyzed by high-performance liquid chromatography with diode array detection (HPLC-DAD), ultra-performance liquid chromatography with diode array detector and mass spectrometry (UPLC-DAD-MS/MS) and nuclear magnetic resonance (NMR) spectroscopy.

http://dx.doi.org/10.21577/0103-5053.20180131

Published online: July 6, 2018.


J. Braz. Chem. Soc. 2018

Fast Ephedrine Quantification by Gas Chromatography Mass Spectrometry

Gabriel R. A. Carneiro; Andressa M. S. Silva; Raquel M. Cavalcante; Monica C. Padilha; Francisco R. de Aquino Neto; Henrique M. G. Pereira; Vinícius F. Sardela

Straightforward method for ephedrine quantification based on gas chromatography mass spectrometry (GC-MS), without cleanup, and optimized by multivariate Doehlert matrix.

http://dx.doi.org/10.21577/0103-5053.20180130

Published online: July 3, 2018.

J. Braz. Chem. Soc. 2018

Facile Synthesis and Characterization of Symmetric N-[(Phenylcarbonyl) carbamothioyl]benzamide Thiourea: Experimental and Theoretical Investigations

Rafael G. Silveira; Anderson J. L. Catão; Beatriz N. Cunha; Fernando Almeida; Rodrigo S. Correa; Luan F. Diniz; Juan C. Tenório; Javier Ellena; Aleksey E. Kuznetso; Alzir A. Batista; Edésio Alcântara

Simple synthesis path for obtaining a symmetric thiourea, the theoretical characterization and verification of the intermolecular interactions obtained by X-ray crystallography.

http://dx.doi.org/10.21577/0103-5053.20180129

Published online: July 2, 2018.


J. Braz. Chem. Soc. 2018

Synthesis and Optical Properties of Water-Soluble CdTe:Zn2+ Quantum Dots Prepared by the One-Pot Approach

José C. L. Sousa; Marcelo G. Vivas; Jefferson L. Ferrari; Marco A. Schiavon

Color map representing the emission vs. excitation wavelengths for different synthesis times of CdTe:Zn2+ quantum dots (QDs), and the normalized characteristic emission spectra obtained from the evolving factor analysis/multivariate curve resolution alternating least squares (EFA/MCR-ALS) method for each QD solution show the different sizes of the nanoparticles.

http://dx.doi.org/10.21577/0103-5053.20180128

Published online: July 2, 2018.


J. Braz. Chem. Soc. 2018

A Convenient Synthesis, Reactions and Biological Activity of Some New 6H-Pyrazolo[4',3':4,5]thieno[3,2-d][1,2,3]triazine Compounds as Antibacterial, Anti-Fungal and Anti-Inflammatory Agents

Remon M. Zaki; Adel M. Kamal El-Dean; Shaban M. Radwan; Ahmed F. Saber

In the present work, we have provided an easy access for synthesis of novel thienopyrazole compounds, which were used as starting materials for building new heterocyclic systems namely: pyrazole, triazole and triazine, attached or fused to the thienopyrazole moiety that have revealed remarkable antimicrobial and anti-inflammatory activities.

http://dx.doi.org/10.21577/0103-5053.20180127

Published online: June 29, 2018.


J. Braz. Chem. Soc. 2018

Optimization of Acid Hydrolysis of Myricetin-3-O-rhamnoside Using Response Surface Methodology

Tatiana C. Tolosa; Hervé Rogez; Evaldo M. Silva; Jesus N. S. Souza

The acid hydrolysis of glycosylated flavonols were optimized and the hydrolytic process used is effective and applicable to plant extract (Inga edulis leaves).

http://dx.doi.org/10.21577/0103-5053.20180125

Published online: June 26, 2018.

J. Braz. Chem. Soc. 2018

Voltammetric Determination of Zn2+ in Antiseptic Dusting Powder and Multivitamins Using a Carbon Paste Electrode Modified with Bi Anchored on Amberlite® IR120

Wilson T. Fonseca; Leandro A. R. Ribeiro; Lauro A. Pradela-Filho; Regina M. Takeuchi; André L. Santos

Carbon paste electrodes modified with Bi anchored on Amberlite® IR120 enable fast Zn2+ determination in multivitamin and antiseptic dusting powder samples.

http://dx.doi.org/10.21577/0103-5053.20180124

Published online: June 26, 2018.


J. Braz. Chem. Soc. 2018

Assessment of Adulteration of Cosmetics Based on Vegetable Oils by GC-FID and Lipid Profile Using Direct Infusion Electrospray Ionization Mass Spectrometry (ESI-MS)

Jessica S. Pizzo; Marília B. Galuch; Patrícia D. S. Santos; Oscar O. Santos; Lorena Visentainer; Marcos N. Eberlind; Jesuí V. Visentainer

Vegetable oils have been applied to human skin for cosmetic purposes for a long time. However, they are targets of adulterations, especially with addition of oils with low cost. This study will evaluate the authenticity of Brazilian cosmetics based on vegetable oils.

http://dx.doi.org/10.21577/0103-5053.20180123

Published online: June 25, 2018.


J. Braz. Chem. Soc. 2018

Electrochemical Deposition of the Single Phase TlxCu3 – xSe2 Thin Films

Francisco W. S. Lucas; Lucia H. Mascaro

TlCu2Se2 texturized film was electrodeposited with [004] crystalline plane oriented parallel to the substrate surface. This texturization can also be associated with the films morphology.

http://dx.doi.org/10.21577/0103-5053.20180122

Published online: June 25, 2018.

J. Braz. Chem. Soc. 2018

Simultaneous Determination of Four Antibiotics in Raw Milk by UPLC-MS/MS Using Protein Precipitation as Sample Preparation: Development, Validation, and Application in Real Samples

Thiago Magon; Roberta da Silveira; Marília B. Galuch; Eder Paulo Fagan; Ana Flavia D. Feitoza; Sylvio V. Palombini; Oscar O. Santos; Jesui V. Visentainer

Determination of tetracycline, oxytetracycline, penicillin G and ceftiofur in raw milk by ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) using protein precipitation as sample preparation: development, validation, and application in raw milk samples from dairy cows medicated with tetracycline (24, 48, 72 and 96 h after treatment) for subclinical mastitis.

http://dx.doi.org/10.21577/0103-5053.20180121

Published online: June 25, 2018.

J. Braz. Chem. Soc. 2018

Chemometric-Assisted Hydrophilic Interaction Chromatographic Method for the Determination of Gadolinium-Based Magnetic Resonance Imaging Contrast Agent in Liposomes

Ana Luiza C. Maia; Pedro Henrique R. da Silva; Christian Fernandes; Aline T. M. e Silva; André Luís B. de Barros; Daniel Crístian F. Soares; Gilson A. Ramaldes

Development, using chemometrics tools, of a hydrophilic interaction chromatographic method for the determination of gadodiamide in liposomes.

http://dx.doi.org/10.21577/0103-5053.20180120

Published online: June 22, 2018.


J. Braz. Chem. Soc. 2018

Use of a Natural Sorbent as Alternative Solid-Phase Microextraction Coating for the Determination of Polycyclic Aromatic Hydrocarbons in Water Samples by Gas Chromatography-Mass Spectrometry

Natália G. Suterio; Sângela N. do Carmo; Dilma Budziak; Josias Merib; Eduardo Carasek

In this study, the use of a biosorbent-based coating in solid-phase microextraction was proposed for the determination of polycyclic aromatic hydrocarbons in water samples.

http://dx.doi.org/10.21577/0103-5053.20180119

Published online: June 22, 2018.

J. Braz. Chem. Soc. 2018

Synthesis and Antibacterial Evaluation of 3,5-Diaryl-1,2,4‑oxadiazole Derivatives

Felipe S. Cunha; Joseli M. R. Nogueira; Alcino P. de Aguiar

Twenty 1,2,4-oxadiazole derivatives were synthesized and evaluated against five different bacteria.

http://dx.doi.org/10.21577/0103-5053.20180118

Published online: June 20, 2018.


J. Braz. Chem. Soc. 2018

Preparation of Microcapsules of Slow-Release NPK Compound Fertilizer and the Release Characteristics

Wancheng Pang; Dejia Hou; Huan Wang; Shu Sai; Baorui Wang; Jingwen Ke; Gaobing Wu; Qing Li; Mark T. Holtzapple

The graphical abstract is an amplified structure of slow-release fertilizer. Microcapsule structure has disappeared after water soaking and the nutrient is slowly released completely.

http://dx.doi.org/10.21577/0103-5053.20180117

Published online: June 19, 2018.

J. Braz. Chem. Soc. 2018

Oxidation of Single-Walled Carbon Nanotubes under Controlled Chemical Conditions

Arthur B. Porto; Glaura G. Silva; Hélio F. dos Santos; Luiz F. C. de Oliveira

Single-walled carbon nanotubes (SWCNT) are oxidized in acid medium under controlled NO2+ concentration and reaction time.

http://dx.doi.org/10.21577/0103-5053.20180116

Published online: June 18, 2018.

J. Braz. Chem. Soc. 2018

Al-MCM-41 Synthesized from Kaolin via Hydrothermal Route: Structural Characterization and Use as an Efficient Adsorbent of Methylene Blue

Evânia C. Santos; Luelc S. Costa; Edipo S. Oliveira; Raquel A. Bessa; Armando D. L. Freitas; Cristiane P. Oliveira; Ronaldo F. Nascimento; Adonay R. Loiola

Natural kaolin is efficiently converted, via dealumination and hydrothermal route, to Al-Mobil Composition of Matter No. 41 (Al-MCM-41) mesoporous materials, with a high area surface, showing high performance on methylene blue adsorption from aqueous medium.

http://dx.doi.org/10.21577/0103-5053.20180115

Published online: June 18, 2018.


J. Braz. Chem. Soc. 2018

Compound-Specific δ13C of n-Alkanes: Clean-Up Methods Appraisal and Application to Recent Sediments of a Highly Contaminated Bay

Milena Ceccopieri; Arthur L. Scofield; Lilian Almeida; Angela L. R. Wagener

The image summarizes the δ13C equation and the isotopic signature from different carbon sources in the Guanabara Bay, i.e., phytoplankton, mangrove trees, fossil fuel from boat traffic and industries.

http://dx.doi.org/10.21577/0103-5053.20180114

Published online: June 14, 2018.

J. Braz. Chem. Soc. 2018

Geometry and Stability of Molecular Clusters: Factor to Be Considered in Biomolecular Activity

Noam G. da Silva; Alexandre M. Alecrim; Renyer A. Costa; Kelson M. T. de Oliveira

Molecular clusters are proposed as explanation for the different activities of betulinic and melaleucic acids, compounds with very similar properties.

http://dx.doi.org/10.21577/0103-5053.20180113

Published online: June 12, 2018.


J. Braz. Chem. Soc. 2018

N-Alkylated Sulfamic Acid Derivatives as Organocatalyst in Multicomponent Synthesis of Fatty Dihydropyrimidinones

Carolina R. L. Hack; Larissa Porciuncula; Andressa C. H. Weber; Caroline R. M. D'Oca; Dennis Russowsky; Jaqueline M. Moura; Luiz A. A. Pinto; Marcelo G. M. D'Oca

N-Alkylated sulfamic acid derivatives are introduced as promising acidic organocatalysts in multicomponent reactions to the synthesis of dihydropyrimidinones.

http://dx.doi.org/10.21577/0103-5053.20180112

Published online: June 11, 2018.


J. Braz. Chem. Soc. 2018

In-Line Incomplete Solid-Liquid Extraction for Spectrophotometric Determination of Soluble Inorganic Phosphorus in Plants and Foods

Caio C. V. Macedo; Rodrigo S. N. Mancini; Carolina Y. Arakaki; Diogo L. Rocha

Incomplete and reproducible soluble inorganic phosphorus extraction from vegetable materials and foods prior to spectrochemical analysis in a flow injection analysis (FIA) system with zones penetration.

http://dx.doi.org/10.21577/0103-5053.20180110

Published online: June 8, 2018.

J. Braz. Chem. Soc. 2018

Automatic Procedure to Determine Acidity in Fuel Ethanol by Photometric Titration Using Binary Search and Multicommuted Flow Analysis

Manoel J. A. Lima; Boaventura F. Reis

A pictorial overview of the titration procedures for ethanol fuel employing manual and automatic approaches.

http://dx.doi.org/10.21577/0103-5053.20180109

Published online: June 8, 2018.

J. Braz. Chem. Soc. 2018

Synthesis, Characterization and Evaluation of in vitro Antitumor Activities of Novel Chalcone-Quinolinone Hybrid Compounds

Giulio D. C. d'Oliveira; Andrea F. Moura; Manoel O. de Moraes; Caridad N. Perez; Luciano M. Lião

Chalcone-quinolinone synthesis: one step reaction, good yield and pure precipitate.

http://dx.doi.org/10.21577/0103-5053.20180108

Published online: June 4, 2018.


J. Braz. Chem. Soc. 2018

Occurrence of Pesticides in Pericarpium Citri Reticulatae and Related Products Using Syringe Filter-Based Cleanup

Fuxin Liu; Xiaowen Dou; Jiaoyang Luo; Dandan Kong; Zhuowen Fan; Meihua Yang

Persistent organochlorines were found in commercial Pericarpium Citri Reticulatae by a "push-and-pull" needle filter based cleanup and gas chromatography (GC) analysis.

http://dx.doi.org/10.21577/0103-5053.20180107

Published online: June 4, 2018.


J. Braz. Chem. Soc. 2018

Wastewater-Based Epidemiology of Cocaine in the Brazilian Federal District: Spatial Distribution, Weekly Variation and Sample Preservation Strategies

Fernando F. Sodré; Rafael S. Feitosa; Wilson F. Jardim; Adriano O. Maldaner

Cocaine use in the Brazilian Federal District, assessed by wastewater-based epidemiology (WBE), revealed higher consumption in the north area, notably during weekends. A nationwide survey may be carried out with sewage samples adjusted to pH 2 and transported within three days under ambient conditions.

http://dx.doi.org/10.21577/0103-5053.20180105

Published online: May 29, 2018.

J. Braz. Chem. Soc. 2018

Exponential Fed-Batch Cultures of Klebsiella pneumoniae under Anaerobiosis Using Raw Glycerol as a Substrate to Obtain Value-Added Bioproducts

Allan Morcelli; Rosane Rech; Andre Klafke; Rafael Pelegrini; Marco A. Z. Ayub

Residual glycerol can be used as substrate in the production of valuable compounds by Klebsiella pneumonia in exponentially fed-batch cultures (EFBC).

http://dx.doi.org/10.21577/0103-5053.20180104

Published online: May 29, 2018.


J. Braz. Chem. Soc. 2018

Mate as Dietary Supplement for Broiler Chickens: Effect on the Metabolic Profile and Redox Chemistry of Meat

Caroline Ceribeli; Andressa de Zawadzki; Aline M. C. Racanicci; Luiz A. Colnago; Leif H. Skibsted; Daniel R. Cardoso

Mate extract in animal diet improves the redox status of meat by changing its metabolic profile towards the production of endogenous antioxidants.

http://dx.doi.org/10.21577/0103-5053.20180103

Published online: May 29, 2018.


J. Braz. Chem. Soc. 2018

Development, Optimization and Validation of a GC Method by Polarity Phase Constants and Statistical Design of Experiments for the Determination of Monoterpenes in Alpinia zerumbet Essential Oil

Igor C. Cardoso; Marcos J. Nakamura; Virginia G. Correia; Henrique M. G. Pereira; Maria D. Behrens; Marcelo R. R. Tappin

In this report, we described the optimization by response surface methodology of a new analytical method by gas chromatography (GC) for analysis of Alpinia zerumbet essential oil.

http://dx.doi.org/10.21577/0103-5053.20180102

Published online: May 29, 2018.

J. Braz. Chem. Soc. 2018

Study of the Naphthenic Corrosion of AISI 316 and AISI 1020 Steels by Light, Scanning Electron and Atomic Force Microscopies (LM, SEM and AFM)

Débora V. Domingos; Fabrício C. Tozzi; Eliane V. Barros; Fernanda E. Pinto; Cristina M. S. Sad; Paulo R. Filgueiras; Valdemar Lacerda Jr.; Heloisa P. Dias; Glória M. V. F. Aquije; Wanderson Romão

AISI 316 and AISI 1020 steel coupons were analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) before and after immersion in various crude oil samples and their respective blends for 48 days at room temperature.

http://dx.doi.org/10.21577/0103-5053.20180101

Published online: May 25, 2018.


J. Braz. Chem. Soc. 2018

Effect of Calcination Temperature on Catalytic Performance of CeCu Oxide in Removal of Quinoline by Wet Hydrogen Peroxide Oxidation from Water

Zhaojie Jiao; Guilin Zhou; Haidong Zhang; Yu Shen; Xianming Zhang; Juexuan Li; Xu Gao

The CeCu-mixed oxide catalyst calcinated at temperature of 650 °C took on the best performance with an oxidation conversion up to 98% for quinoline, a removal efficiency of 80.6% for total organic carbon (TOC) and a low Cu2+ leaching value of 19.3 mg L-1.

http://dx.doi.org/10.21577/0103-5053.20180100

Published online: May 25, 2018.

J. Braz. Chem. Soc. 2018

Air Quality in the Maracanã and Deodoro Zones During the Rio 2016 Olympic Games

Carolina A. Bezerra; Nicole J. de Carvalho; Claudio G. P. Geraldino; Cleyton M. da Silva; Graciela Arbilla

C4-C12 non-oxygenated volatile organic compounds and criteria pollutants were analyzed during the Rio de Janeiro Summer 2016 Olympic Games, in two Olympic zones, Maracanã (Tijuca) and Deodoro.

http://dx.doi.org/10.21577/0103-5053.20180099

Published online: May 22, 2018.


J. Braz. Chem. Soc. 2018

Synthesis, Characterization and Preliminary Study on Acetylpyrazine N(4)Butylthiosemicarbazone as a Potential CDK2 Inhibitor Combined with DFT Calculations

Erna Normaya; Mohammad N. Ahmad; Yang Farina; Ku H. K. Bulat

The graphical abstract shows the 3D plots of molecular electrostatic potential of optimized structure and the interaction of acetylpyrazine N(4)butylthiosemicarbazone (APBT) with amino acid residues in cyclin-dependent kinase 2 (CDK2) macromolecule. Calculation within the grid box size of 30 × 30 × 30 Å3 showed the formation of stable complex with binding affinity value of -6.4 kcal mol-1.

http://dx.doi.org/10.21577/0103-5053.20180097

Published online: May 18, 2018.


Short Report J. Braz. Chem. Soc. 2018

Degradation Products of Lambda-Cyhalothrin in Aqueous Solution as Determined by SBSE-GC-IT-MS

Renata Colombo; Janete H. Yariwake; Marcos R. V. Lanza

Lambda-cyhalothrin derivative products were identified by stir bar sorptive extraction and gas chromatography using liquid and thermal desorption.

http://dx.doi.org/10.21577/0103-5053.20180096

Published online: May 18, 2018.

Articles J. Braz. Chem. Soc. 2018

Use of Constrained Mixture Design in the Optimization of a Method Based on Extraction Induced by Emulsion Breaking for the Determination of Ca, Mg, Mn, Fe and Zn from Palm Oil by Flame Atomic Absorption Spectrometry

Gisseli S. Valasques; Ana M. P. dos Santos; Darllen G. da Silva; Juscelia P. S. Alves; Marcos A. Bezerra

Constrained mixture design was used in the development of a method for Ca, Mg, Mn, Fe and Zn determination from palm oil samples.

http://dx.doi.org/10.21577/0103-5053.20180095

Published online: May 15, 2018.

J. Braz. Chem. Soc. 2018

Organophosphorus Pesticide in Sapodilla (Manilkara zapota) Fruit

Daniel B. Alcântara; Mario S. O. Paz; Tigressa H. S. Rodrigues; Tatiana S. M. Fernandes; Pablo G. A. Barbosa; Adonay R. Loiola; Patricia Grinberg; Guilherme J. Zocolo; Edy S. de Brito; Ronaldo F. do Nascimento

A methodology for the determination of organophosphorus pesticides in sapodilla fruit based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction and gas chromatography-mass spectrometry (GC-MS) detection is described. Strong matrix effects could be observed and was overcome with the use of matrix match calibration. Chlorpyrifos, a level II toxic compound, was found in several commercial samples.

http://dx.doi.org/10.21577/0103-5053.20180094

Published online: May 14, 2018.

J. Braz. Chem. Soc. 2018

Effect of Temperature on Devulcanization of Waste Sidewall Rubber by Supercritical Ethanol

Xiang Li; Xiao-Qing Deng; Chao Dong

In the low temperature (LT) region, the devulcanization happened due to the breakage of crosslinked bonds. Supercritical ethanol beyond the critical temperatures (medium temperatures (MT) and high temperatures (HT)) could strongly promote the devulcanizing reaction; the breakage of main chains predominated in the devulcanizing process. The devulcanizing reaction rate of natural rubber was faster than that of butadiene rubber.

http://dx.doi.org/10.21577/0103-5053.20180093

Published online: May 14, 2018.

J. Braz. Chem. Soc. 2018

Wax Behavior in Crude Oils by Pour Point Analyses

Lize M. S. L. Oliveira; Rita C. P. Nunes; Ygor L. L. Ribeiro; Dayane M. Coutinho; Débora A. Azevedo; Júlio C. M. Dias; Elizabete F. Lucas

Two-dimensional gas chromatography of a crude oil sample.

http://dx.doi.org/10.21577/0103-5053.20180092

Published online: May 11, 2018.

J. Braz. Chem. Soc. 2018

Multiple-Injection Capillary Zone Electrophoresis as a Fast Strategy to Determine Antinitrosating Capacity of Commercial Teas

Ana P. Ruani; Luciano Vitali; Gustavo A. Micke

A multiple-injection capillary electrophoresis method was developed to determine antinitrosating capacity of nine commercial teas through nitrite quantification.

http://dx.doi.org/10.21577/0103-5053.20180090

Published online: May 10, 2018.

J. Braz. Chem. Soc. 2018

Preparation, Characterization and Catalytic Activity of Palladium Catalyst Supported on MgCO3 for Dynamic Kinetic Resolution of Amines

Marina M. M. Ferreira; Camila R. Cabreira; Pedro H. K. Chaves; Gabriela M. Labussiére; Renata C. Zimpeck; Sania M. de Lima; Fernanda A. de Siqueira

This paper reports the preparation of Pd/MgCO3. The composition and size particle were obtained by X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The catalytic activity was studied for racemization of (S)-(-)-1-phenylethylamine and dynamic kinetic resolution (DKR) of a series of primary amines.

http://dx.doi.org/10.21577/0103-5053.20180089

Published online: May 7, 2018.


J. Braz. Chem. Soc. 2018

Determination of Estrogens in Milk Using Polypyrrole Fiber-Mediated Solid-Phase Extraction Followed by High Performance Liquid Chromatography

Lanlan Wei; Yan Yan; Jianjun Deng; Yuqin Ma; Yu Wang; Xiaoxiao Wu; Xuejun Kang

The schematic representation of packed-fiber solid-phase extraction (PFSPE) device and the determination method proposed in this paper.

http://dx.doi.org/10.21577/0103-5053.20180088

Published online: April 27, 2018.

J. Braz. Chem. Soc. 2018

Metal Organic Frameworks for Selective Degradation of Amoxicillin in Biomedical Wastes

Marcos V. Paula; Amanda L. Barros; Kaline A. Wanderley; Gilberto F. de Sá; Marcos Eberlin; Thereza A. Soares; Severino Alves Jr.

Molecular docking calculations predict the adsorption of widely used antibiotic amoxicillin, but not gentamicin, to the Zn-based metal organic frameworks zeolitic imidazolate framework-8 (ZIF-8) and Zn(1,4-benzenedicarboxylate) (ZnBDC). Mass spectrometry measurements further demonstrate the degradation of amoxicillin upon contact with the Zn-containing frameworks.

http://dx.doi.org/10.21577/0103-5053.20180087

Published online: April 26, 2018.


J. Braz. Chem. Soc. 2018

Evaluation of the Suitability of Analytical Methods in Trichothecene A and B Degradation

Ana Carla P. Feltrin; Karen V. M. Sibaja; Cíntia Tusnski; Sergiane S. Caldas; Ednei G. Primel; Jaqueline Garda‑Buffon

Analytical methods were applied in trichothecenes degradation by enzymatic action resulting in a reduction of 68.4% for DON (deoxynivalenol), 45.4% for 15-ADON (15-acetyldeoxynivalenol), 50.2% for 3-ADON (3-acetyldeoxynivalenol) and 12.3% for T-2 toxin.

http://dx.doi.org/10.21577/0103-5053.20180086

Published online: April 24, 2018.

J. Braz. Chem. Soc. 2018

Binary Solvent Dispersive Liquid-Liquid Microextraction for the Determination of Pesticides in Natural Water Samples

Priscila L. S. Estevão; Patricio Peralta-Zamora; Noemi Nagata

The binary solvent dispersive liquid-liquid microextraction was used for the simultaneous quantification of pesticides with a broad polarity range.

http://dx.doi.org/10.21577/0103-5053.20180085

Published online: April 18, 2018.

J. Braz. Chem. Soc. 2018

Amperometric Electrochemical Platform for Hydrazine Determination Exploiting Reduced Graphene Oxide, Co(Salophen) and DNA: Application in Pharmaceutical Formulations Samples

Ludymila V. Freitas; Kayni C. M. S. Lima; Saimon M. Silva; Fernando R. F. Leite; Ridvan N. Fernandes; Wallans T. P. Santos; Flavio S. Damos; Rita C. S. Luz

Oxidation of hydrazine on the rGO/Co(Salophen)DNA modified electrode and cyclic voltammograms for the oxidation of hydrazine on the unmodified glassy carbon electrode (red voltammogram) and rGO/Co(Salophen)DNA modified glassy carbon electrode.

http://dx.doi.org/10.21577/0103-5053.20180084

Published online: April 18, 2018.


J. Braz. Chem. Soc. 2018

Extraction and Characterization of Passion Fruit and Guava Oils from Industrial Residual Seeds and Their Application as Biofuels

Osvaldo K. Iha; Guilherme B. C. Martins; Erick Ehlert; Mateus A. Montenegro; Renata R. Sucupira; Paulo A. Z. Suarez

Guava and passion fruit waste generated by the juice industry were taken and treated to obtain the seed oils, which were characterized and used to produce biofuels.

http://dx.doi.org/10.21577/0103-5053.20180083

Published online: April 17, 2018.

J. Braz. Chem. Soc. 2018

Physicochemical Characterization of a Crude Anthocyanin Extract from the Fruits of Jussara (Euterpe edulis Martius): Potential for Food and Pharmaceutical Applications

Laura I. L. Favaro; Victor M. Balcão; Liliam K. H. Rocha; Erica C. Silva; José M. Oliveira Jr; Marta M. D. C. Vila; Matthieu Tubino

Anthocyanins are attracting the interest of researchers and industry due to potential as a coloring agent and beneficial effects for health. The crude anthocyanin extract produced exhibited slight antimicrobial activity against Staphylococcus aureus, strong antioxidant activity and generalized amorphous behavior.

http://dx.doi.org/10.21577/0103-5053.20180082

Published online: April 16, 2018.

J. Braz. Chem. Soc. 2018

Synthesis and Characterization of Newly Fused 1,2-Dihydropyrido[3,4-b], Bridged Oxadiazol-2-yl, 4-Substituted-benzylidene Hydrazide and Arylidene 6-Chloroquinoxaline 1,4-Dioxides

Samy B. Said; Fawzia Z. El-Ablack; Hani M. Elbeheiry

Some new unexpected arylidene and fused heterocyclic 6-chloroquinoxaline 1,4-dioxide are synthesized from the precursor 6-chloro-3-(ethoxycarbonyl)-2-methylquinoxaline 1,4-dioxide.

http://dx.doi.org/10.21577/0103-5053.20180081

Published online: April 16, 2018.


J. Braz. Chem. Soc. 2018

Electrical Immunosensor Made with Antigenic Peptide NS5A‑1 Immobilized onto Silk Fibroin for Diagnosing Hepatitis C

Lais R. Lima; Alem-Mar B. Gonçalves; Fernando V. Paulovich; Osvaldo N. Oliveira Jr.; Sidney J. L. Ribeiro; Marli L. Moraes

Electrical response of the immunosensor solutions containing the specific antibody anti-hepatitis C virus (HCV) could be clearly distinguished and for unspecific antibody anti-human immunodeficiency virus (HIV) no significant change has been observed.

http://dx.doi.org/10.21577/0103-5053.20180080

Published online: April 16, 2018.


J. Braz. Chem. Soc. 2018

Determination of 4-Nonylphenol in Surface Waters of the Guandu River Basin by High Performance Liquid Chromatography with Ultraviolet Detection

Frederico G. de Araujo; Glauco F. Bauerfeldt; Yara P. Cid

Solid-phase extraction and liquid chromatography coupled with an ultraviolet detector were used for the detection and quantification of 4-nonylphenol in samples of surface water collected in the basin of the Guandu River.

http://dx.doi.org/10.21577/0103-5053.20180079

Published online: April 13, 2018.

J. Braz. Chem. Soc. 2018

Nature of Insoluble Material Found in the Bottom of Soybean Biodiesel Storage Tank: Chemical and Microbiological Approach

Juciana C. Cazarolli; Gabriela Boelter; Amanda M. D. L. de Lima; Thaisa Hengles; Camila Correa; Maria C. R. Peralba; Marco F. Ferrão; Eduardo H. S. Cavalcanti; Márcia V. Bisol; Kelly S. Bezerra; Nelson R. Antoniosi Filho; Fátima M. Bento

Sediment from the bottom of biodiesel storage tanks was characterized by chemical and microbiological techniques. Fatty acids esters and metal ions were detected, as well as bacteria and fungi, which after 60 days in incubation did not exhibit biodiesel deteriogenic potential.

http://dx.doi.org/10.21577/0103-5053.20180078

Published online: April 11, 2018.

J. Braz. Chem. Soc. 2018

Synergism in the Antibacterial Action of Ternary Mixtures Involving Silver Nanoparticles, Chitosan and Antibiotics

Marcelo S. L. Brasil; Aline L. Filgueiras; Marina B. Campos; Mariana S. L. Neves; Mateus Eugênio; Lídia A. Sena; Celso B. Sant'Anna; Vânia L. da Silva; Cláudio G. Diniz; Antonio C. Sant'Ana

The combined antimicrobial action of the ternary mixture of silver nanoparticles, chitosan and antibiotics against four bacterial strains proved synergic. The pH conditions for the biological assays were carefully defined to exclude the acid effect in the antimicrobial action, preserving chitosan solubility.

http://dx.doi.org/10.21577/0103-5053.20180077

Published online: April 11, 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