JBCS

21:38, Sun Sep 24

Open Access/APCs

Forthcoming Papers - 2017

Articles published online ahead of print




Articles J. Braz. Chem. Soc. 2017

Determination of Chlorine in Crude Oil Emulsified via the MgCl Molecule by HR‑CS MAS

Izabel K. S. Oliveira; Rina L. S. Medeiros; Djalma R. Silva; Tatiane A. Maranhão

Chlorine present in crude oil is an important cause of problems related to corrosion and damage to equipment. This paper describes the development of a method for chlorine determination in crude oil samples through MgCl diatomic molecule by high-resolution continuum source molecular absorption spectrometry (HR-CS MAS).

http://dx.doi.org//10.21577/0103-5053.20170169

Published online: September 22, 2017.

J. Braz. Chem. Soc. 2017

Development of a Novel Mixed Titanium, Silver Oxide Polyacrylonitrile Nanofiber as a Superior Adsorbent and its Application for MB Removal in Wastewater Treatment

Zhiqun Xu; Congcong Wei; Jiali Jin; Wenkai Xu; Qiao Wu; Junjie Gu; Minrui Ou; Xiaoping Xu

Development of a novel mixed titanium, silver oxide nanofiber as a superior adsorbent for dyes removal in the wastewater treatment.

http://dx.doi.org/10.21577/0103-5053.20170168

Published online: September 22, 2017.

J. Braz. Chem. Soc. 2017

Photoluminescence of Solvent-Selected Fluorescent Moieties in MEH-PPV Solutions and Films

Antonio C. C. Ribeiro; Henrique S. Camargo; Douglas H. Pereira; Rogério Custódio; Tatiana D. Martins

The photophysical behavior of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) is morphology-dependent in both solution and film form: the preparation method influences the exciton distribution.

http://dx.doi.org/10.21577/0103-5053.20170167

Published online: September 21, 2017.


J. Braz. Chem. Soc. 2017

Simultaneous Determination of Kaempferide, Kaempferol and Isorhamnetin in Rat Plasma by Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry and its Application to a Pharmacokinetic Study

Zhitao Jiang; Jianchun Wang; Xiaofeng Chen; Xue Wang; Tongfang Wang; Zhitao Zhua; Jinhuo Pan

The mean plasma concentration-time curves after an oral administration of Sedum sarmentosum Bunge extract are shown. The data conformed to a two-compartment, first-order pharmacokinetic model.

http://dx.doi.org/10.21577/0103-5053.20170166

Published online: September 18, 2017.

J. Braz. Chem. Soc. 2017

A Novel Sensitive Bulk Optode Based on 5-Br Salophen as an Ionophore for Determination of Zinc Ion in Real Samples

Elham Alian; Abolfazl Semnani; Alireza Firooz; Mahboube Shirani

The decrease of the concentration of 5-Br salophen in presence of Zn2+ in organic phase leads to an optical sensor, in which the mechanism is described by ion-exchange.

http://dx.doi.org/10.21577/0103-5053.20170165

Published online: September 15, 2017.

J. Braz. Chem. Soc. 2017

An in silico Study of Benzophenone Derivatives as Potential Non-Competitive Inhibitors of Trypanosoma cruzi and Leishmania Amazonensis Cysteine Proteinases

Poliany G. Freitas; Thiago E. Castilho; Leticia de Almeida; Claudia M. Maciel-Rezende; Luciano T. Costa; Claudio Viegas Junior; Marcos J. Marques; Marcelo H. dos Santos; Nelson J. F. da Silveira

The mechanism of interaction between benzophenone derivatives and cruzain and Llacys1 (the protein expressed by cysteine protease gene isoform 1 of L. amazonensis) by homology modelling, docking and molecular dynamics simulation.

http://dx.doi.org/10.21577/0103-5053.20170164

Published online: September 14, 2017.


J. Braz. Chem. Soc. 2017

Antimicrobial Diterpene from the Brazilian Termite Nasutitermes macrocephalus (Isoptera: Termitidae: Natutitermitinae)

Márcia N. S. de la Cruz; Helvécio M. dos Santos Júnior; Denilson F. Oliveira; Claudia M. Rezende

A new trinervitane diterpene isolated from termite soldiers (Nasutitermes macrocephalus) presented antimicrobial activities against S. aureus and C. albicans.

http://dx.doi.org/10.21577/0103-5053.20170163

Published online: September 14, 2017.


J. Braz. Chem. Soc. 2017

Fine and Coarse Aerosol at Rio de Janeiro prior to the Olympic Games: Chemical Composition and Source Apportionment

Maria Luíza D. P. Godoy; Ana C. Almeida; Gisele B. Tonietto; José Marcus Godoy

Aerosol sampler installed at Tijuca sampling station, showing both EPA design PM10 inlets, one for elemental analysis (left) and the other for carbon determination (right).

http://dx.doi.org/10.21577/0103-5053.20170162

Published online: September 13, 2017.


J. Braz. Chem. Soc. 2017

The Dichromate Method versus the Photoelectrochemical Method: the Synergistic Influence of Turbidity and Chlorides on Chemical Oxygen Demand Analysis

Gabriel O. Quintana; Enelton Fagnani; Fernando P. Candello; José R. Guimarães

The combined effect of turbidity and chlorides on chemical oxygen demand have not been explored before this study and must be considered when the acid dichromate method is replaced by photoelectrochemical method.

http://dx.doi.org/10.21577/0103-5053.20170161

Published online: September 11, 2017.

J. Braz. Chem. Soc. 2017

Simultaneous Determination of Different Phenolic Compounds Using Electrochemical Biosensor and Multivariate Calibration

Renata K. Mendes; Marcos V. C. Dantas; Alessandra B. Nogueira; Augusto Etchegaray; Paulo R. Filgueiras; Ronei J. Poppi

A biosensor based on tyrosinase immobilized onto iron magnetic nanoparticles was successfully used for the simultaneous determination of two phenolic compounds after data analysis and chemometric treatment.

http://dx.doi.org/10.21577/0103-5053.20170160

Published online: September 11, 2017.


J. Braz. Chem. Soc. 2017

Principal Component Analysis with Linear and Quadratic Discriminant Analysis for Identification of Cancer Samples Based on Mass Spectrometry

Camilo L. M. Morais; Kássio M. G. Lima

Principal component analysis with linear discriminant analysis (PCA-LDA) and quadratic discriminant analysis (PCA-QDA) were applied for discrimination between healthy control and cancer samples (ovarian and prostate cancer) based on mass spectra data sets.

http://dx.doi.org/10.21577/0103-5053.20170159

Published online: September 5, 2017.


J. Braz. Chem. Soc. 2017

Effects of a Diet Supplemented with Japanese Grape (Hovenia dulcis) Seed Oil on the Omega-3 and Nutritional Lipid Quality in Nile Tilapia (Oreochromis niloticus)

Marina Oliveira; Ricardo P. Ribeiro; Michele C. da Silva; Paula F. Montanher; Fabiana Carbonera; Jesuí V. Visentainer; Liane Maldaner

Japanese grape seed oil (JGSO) is rich in alpha-linolenic acid (LNA) and was used to prepare supplemented diets for Nile tilapia. The replacement of soybean oil with JGSO in the prepared diets raises the nutritional lipid quality of the freshwater fish.

http://dx.doi.org/10.21577/0103-5053.20170158

Published online: September 5, 2017.

J. Braz. Chem. Soc. 2017

A Novel Nanofibrous Film Chemosensor for Detecting and Adsorbing Fe3+

Chen Zhou; Yinan Zhang; Heng Liu

Recognition of the nanofibrous film chemosensor for Fe3+ by decrease of fluorescence.

http://dx.doi.org/10.21577/0103-5053.20170157

Published online: September 1, 2017.


J. Braz. Chem. Soc. 2017

Enantiomeric Ratio Changes of Terpenes in Essential Oils from Hybrid Eucalyptus grandis × E. tereticornis and its Pure Species

Cecilia Naspi; Agustín A. Costa; Alejandro Lucia; Paola G. Audino; Hector M. Masuh

Fractionation of essential oils from Eucalyptus grandis × E. tereticornis, and its parental taxa, by HPLC followed by GC-MS analysis using two columns in series, allowed to determinate the enantiomeric excesses of selected monoterpenes. Significant differences were found in the enantiomeric ratios in monoterpene alcohols between the three essential oils.

http://dx.doi.org/10.21577/0103-5053.20170156

Published online: August 31, 2017.

J. Braz. Chem. Soc. 2017

Catalytic Behaviors of CoII and MnII Compounds Bearing α-Diimine Ligands for Oxidative Polymerization or Drying Oils

Gilvan E. S. Lima; Everton V. Nunes; Roberta C. Dantas; Carlos A. de Simone; Mario R. Meneghetti; Simoni M. P. Meneghetti

Metal carboxylate complex modified with nitrogen ligands used as catalyst to oxidative polymerization of drying oils.

http://dx.doi.org/10.21577/0103-5053.20170155

Published online: August 29, 2017.


J. Braz. Chem. Soc. 2017

Thermal Properties and Kinetics of Al/α-MnO2 Nanostructure Thermite

Jia-Xing Song; Xiang Fang; Tao Guo; Feng-Li Bei; Wen Ding; Xiao-Nan Zhang; Miao Yao; Hong-Jun Yu

Thermal properties and kinetics of Al/α-MnO2 nanostructure thermite was reported in this work. According to DSC curves, the heat release and onset temperature were measured. Then the changes of activation energy on extent of conversion (α) for kinetics of Al/α-MnO2 thermite were obtained by using isoconversional method.

http://dx.doi.org/10.21577/0103-5053.20170154

Published online: August 29, 2017.

J. Braz. Chem. Soc. 2017

Absolute Configuration of Solenopsis Piperidines is a Tool to Classify Fire Ants (Formicidae:Myrmicinae)

Francisca D. S. Araújo; Marcela A. Botelho; José R. Trigo; Anita J. Marsaioli

Chiral GC chromatogram of the peak discrimination of 2-methyl-6-undecylpiperidine trifluoroacetamide stereoisomers (synthetic standard mixture).

http://dx.doi.org/10.21577/0103-5053.20170153

Published online: August 24, 2017.


J. Braz. Chem. Soc. 2017

Comparative Study of the Lipid Profiles of Oils from Kernels of Peanut, Babassu, Coconut, Castor and Grape by GC-FID and Raman Spectroscopy

William S. Martini; Brenda L. S. Porto; Marcone A. L. de Oliveira; Antonio C. Sant'Ana

A fast evaluation of the degree of unsaturation and the presence of oxidized products in oil samples by Raman spectroscopy, through the identification of marker bands, assigned by supporting of GC-FID analyses of standard fatty acids.

http://dx.doi.org/10.21577/0103-5053.20170152

Published online: August 24, 2017.

J. Braz. Chem. Soc. 2017

Suspended and Immobilized TiO2 Photocatalytic Degradation of Estrogens: Potential for Application in Wastewater Treatment Processes

Marcus V. de Liz; Rubia M. de Lima; Bianca do Amaral; Belisa A. Marinho; Jessica T. Schneider; Noemi Nagata; Patricio Peralta-Zamora

Photocatalytic degradation of estrogens by suspended and immobilized TiO2 were compared in aqueous and wastewater samples. The EE2 degradation products were monitored by GC-MS/MS.

http://dx.doi.org/10.21577/0103-5053.20170151

Published online: August 24, 2017.

J. Braz. Chem. Soc. 2017

Effect of Selenite and Selenate Application on Mineral Composition of Lettuce Plants Cultivated Under Hydroponic Conditions: Nutritional Balance Overview Using a Multifaceted Study

Emanueli do Nascimento da Silva; Mirla Cidade; Gabriel Heerdt; Rafael L. Ribessi; Nelson H. Morgon; Solange Cadore

Selenate and selenite enrichment in the Veneza Roxa lettuce was carried out and the mineral composition was evaluated using ICP OES, PCA and molecular modeling. Selenate-biofortified lettuce showed a synergetic effect with S and Mo while selenite-biofortified lettuce showed a synergetic effect with Mn, P, Mg and Ca.

http://dx.doi.org/10.21577/0103-5053.20170150

Published online: August 17, 2017.

J. Braz. Chem. Soc. 2017

Morpho/Proteomic Comparative between High Grade Pleomorphic Sarcoma and Metastasis Diagnosed in an Old Captive Common Hippo

Adriana R. Silva; José T. J. G de Lacerda; Bernadete Faria; Isabela W. da Cunha; Vitor P. de Andrade; Nilson A. Assunção

Mass spectrometry analysis as additional tool for description and differentiation of tumor physiopathology: a comparative proteomic study between pheomorphic sarcoma, metastasis and healthy tissues.

http://dx.doi.org/10.21577/0103-5053.20170149

Published online: August 17, 2017.


J. Braz. Chem. Soc. 2017

Alkaline Solubilization of Chicken Tissues Monitored by Raman Spectroscopy Followed by Pb Determination by GF AAS

Náira S. Campos; Marcone A. L. de Oliveira; Celly M. S. Izumi; Rafael A. de Sousa

Lead content was evaluated in chicken viscera by GF AAS after solubilization with tetramethylammonium hydroxide (TMAH). Sample preparation was monitored by Raman spectroscopy and SEM-EDS.

http://dx.doi.org/10.21577/0103-5053.20170148

Published online: August 16, 2017.


J. Braz. Chem. Soc. 2017

The Structure and Composition of Corrosion Product Film and its Relation to Corrosion Rate for Carbon Steels in CO2 Saturated Solutions at Different Temperatures

Yong Zhou; Pei Zhang; Yu Zuo; Dong Liu; Fuan Yan

When carbon steels were exposed in CO2 saturated solutions at different temperatures, corrosion product film with different structure and composition formed on the surface of carbon steels and dominated the corrosion rate of carbon steels significantly.

http://dx.doi.org/10.21577/0103-5053.20170147

Published online: August 16, 2017.

J. Braz. Chem. Soc. 2017

Synthesis, Antioxidant Activity, Acetylcholinesterase Inhibition and Quantum Studies of Thiosemicarbazones

Larissa Sens; Aldo S. de Oliveira; Alessandra Mascarello; Inês M. C. Brighente; Rosendo A. Yunes; Ricardo J. Nunes

The current study investigated the antioxidant activity, acetylcholinesterase inhibition and quantum studies of thiosemicarbazones.

http://dx.doi.org/10.21577/0103-5053.20170146

Published online: August 4, 2017.


J. Braz. Chem. Soc. 2017

Preparation of Tetraethylenepentamine Modified Magnetic Graphene Oxide for Adsorption of Dyes from Aqueous Solution

Xiaosheng Tang; Ping Tang; Liangliang Liu

Tetraethylenepentamine modified magnetic graphene oxide nanomaterial was prepared and it had a good adsorption ability to remove dyes in wastewater.

http://dx.doi.org/10.21577/0103-5053.20170145

Published online: August 2, 2017.

J. Braz. Chem. Soc. 2017

SBA-15 as a Support for Nickel-Based Catalysts for Polymerization Reactions

Anderson J. Schwanke; Cristiano Favero; Rosana Balzer; Katia Bernardo-Gusmão; Sibele B. C. Pergher

Polymerization reaction with a nickel-based catalyst supported on SBA-15 mesoporous materials.

http://dx.doi.org/10.21577/0103-5053.20170144

Published online: August 1, 2017.

J. Braz. Chem. Soc. 2017

Functionalization of Bentonite and Vermiculite after the Creation of Structural Defects through an Acid Leaching Process

Dorsan S. Moraes; Lucas C. R. Miranda; Rômulo S. Angélica; Geraldo N. Rocha Filho; José R. Zamian

Schematic model of a 2:1 layer structure of the organofunctionalized materials present in this work, suggesting the superficial acid sites created.

http://dx.doi.org/10.21577/0103-5053.20170143

Published online: July 31, 2017.

J. Braz. Chem. Soc. 2017

Surface Imprinting of Silica Gel by Methyldopa and Its Application in the Solid Phase Extraction Procedure

Mohammad Taghi Vardini; Leila Mardani

Surface of the activated silica gel was grafted with the complex of MTD-APS. The custom made holes to the MTD remain on the surface of molecularly imprinted adsorbent.

http://dx.doi.org/10.21577/0103-5053.20170142

Published online: July 24, 2017.

J. Braz. Chem. Soc. 2017

Identification of Anti-Inflammatory and Anti-Hypertensive Drugs as Inhibitors of Bacterial Diguanylate Cyclases

Helton J. Wiggers; Edson Crusca; Éverton E. D. Silva; Juliana Cheleski; Naiara U. Torres; Marcos V. A. S. Navarro

Virtual screening applied to FDA-approved drugs allowed the inhibitor discovery for enzymes diguanylate ciclases involved in the bacterial biofilm formation.

http://dx.doi.org/10.21577/0103-5053.20170141

Published online: July 24, 2017.

Short Report J. Braz. Chem. Soc. 2017

Fast Screening of Solvents for Simultaneous Extraction of Furfural, 5-Hydroxymethylfurfural and Levulinic Acid from Aqueous Solution Using SMD Solvation Free Energies

Ellen V. Dalessandro; Josefredo R. Pliego Jr.

Automated computational screening of 178 solvents for extraction of organic chemicals from aqueous phase.

http://dx.doi.org/10.21577/0103-5053.20170140

Published online: July 20, 2017.


Articles J. Braz. Chem. Soc. 2017

Evaluation of the Concentration of Cu, Zn, Pb and Cr in Different Fish Species from the São Gonçalo Channel in Pelotas-RS, Brazil

Marcelo M. Alves; Aline L. Medina; Ane Martiele T. Pinto; Ana Clara N. Antunes; Pedro José Sanches Filho; Anderson S. Ribeiro; Mariana A. Vieira

The concentration of Cu, Zn, Cr and Pb in different species of fish collected in the estuarine and limnic regions of the São Gonçalo channel in Pelotas City were determined.

http://dx.doi.org/10.21577/0103-5053.20170139

Published online: July 18, 2017.


J. Braz. Chem. Soc. 2017

Use of Amphiphilic Composites based on Clay/Carbon Nanofibers as Fillers in UHMWPE

Claudilene R. Silva; Rochel M. Lago; Helena S. Veloso; Patrícia S. O. Patricio

The more efficient interaction of the fillers based on hydrophobic surface nanostructures with the hydrophobic UHMWPE chains leading to a much higher dispersion of the filler particles throughout the polymeric matrix.

http://dx.doi.org/10.21577/0103-5053.20170138

Published online: July 14, 2017.


J. Braz. Chem. Soc. 2017

Synthesis of 3,5-Diarylisoxazole Derivatives and Evaluation of in vitro Trypanocidal Activity

Aline A. N. de Souza; Viviane F. Xavier; Gleicekelly S. Coelho; Policarpo A. Sales Junior; Alvaro J. Romanha; Silvane M. F. Murta; Claudia M. Carneiro; Jason G. Taylor

A series of novel substituted isoxazoles were prepared and tested for in vitro anti T. cruzi activity. The lead compound is equally as potent as reference drug benzonidazole.

http://dx.doi.org/10.21577/0103-5053.20170137

Published online: July 13, 2017.


J. Braz. Chem. Soc. 2017

Hirshfeld Surfaces and Nonlinear Optics on Two Conformers of a Heterocyclic Chalcone

Jean M. F. Custodio; Cauã A. Moreira; Clodoaldo Valverde; Gilberto L. B. de Aquino; Basílio Baseia; Hamilton B. Napolitano

The nature of crystal packing of an heterocyclic chalcone, investigated by Hirshfeld surfaces, and its potential nonlinear optical properties.

http://dx.doi.org/10.21577/0103-5053.20170136

Published online: July 13, 2017.

J. Braz. Chem. Soc. 2017

Evaluation of Crocins in Cheeses Made with Saffron by UHPLC

Mena Ritota; Maria Mattera; Maria Gabriella Di Costanzo; Pamela Manzi

Cheeses made with saffron are expected to provide an added value for consumers, due to saffron bioactive compounds. This UHPLC method seems to be useful to detect saffron crocins in dairy products.

http://dx.doi.org/10.21577/0103-5053.20170135

Published online: July 13, 2017.

J. Braz. Chem. Soc. 2017

Binary Blends of Biodiesel from Macauba (Acromia aculeata) Kernel Oil with Other Biodiesels

Willian L. G. da Silva; Acacia A. Salomão; Patricia T. de Souza; Marina Ansolin; Matthieu Tubino

The oil from the kernel of macauba presents high stability to oxidation, property that is transferred to its biodiesel, which also presents low cold filter plugging point. Such properties are inherited by its blends with biodiesels obtained from other vegetable oils.

http://dx.doi.org/10.21577/0103-5053.20170134

Published online: July 13, 2017.

J. Braz. Chem. Soc. 2017

A Novel Electrochemical Aptamer Biosensor Based on DNAzyme Decorated Au@Ag Core-Shell Nanoparticles for Hg2+ Determination

Yanling Zhao; Xianmei Xie

Based on thymine-Hg2+-thymine binding mode (T-Hg2+-T), a sensitive aptamer biosensor was constructed by utilizing functionalized Au@Ag core-shell nanoparticles as labels for detection of Hg2+.

http://dx.doi.org/10.21577/0103-5053.20170133

Published online: July 11, 2017.

J. Braz. Chem. Soc. 2017

Nanoporous Gold Surface: An Efficient Platform for Hydrogen Evolution Reaction at Very Low Overpotential

Anandhakumar Sukeri; Mauro Bertotti

A nanostructured porous gold based electrocatalyst was fabricated via a facile electrochemical approach and an excellent activity with good stability for hydrogen evolution reaction was noticed.

http://dx.doi.org/10.21577/0103-5053.20170132

Published online: July 10, 2017.


J. Braz. Chem. Soc. 2017

Synthesis and Application of Bimetallic Zinc(II) Phenoxy-Imine Complexes as Initiators for Production of Lactide Polymers

Alana L. C. Oliveira; Leonardo C. Ferreira; Marcos L. Dias; Rodrigo S. Bitzer; Marco A. C. Nascimento; Maria de Fátima V. Marques; Laura Crociani

Bimetallic ZnII complexes with phenoxy-imine ligands were synthesized and used as initiators for lactide polymerization.

http://dx.doi.org/10.21577/0103-5053.20170131

Published online: July 10, 2017.

J. Braz. Chem. Soc. 2017

Molecular Dynamics Simulations of Cetyltrimethylammonium Bromide (CTAB) Micelles and their Interactions with a Gold Surface in Aqueous Solution

José Adriano da Silva; Roberta P. Dias; Gabriel C. A. da Hora; Thereza A. Soares; Mario R. Meneghetti

MD simulations of: CTAB micelles in water (left) and CTAB micelles adsorbed on a gold surface in aqueous solution (right).

http://dx.doi.org/10.21577/0103-5053.20170130

Published online: July 7, 2017.


J. Braz. Chem. Soc. 2017

Analytical Strategies for Determination and Environmental Impact Assessment of Inorganic Antimony Species in Natural Waters Using Hydride Generation Atomic Fluorescence Spectrometry (HG AFS)

Gerffeson S. dos Santos; Laiana O. B. Silva; Aníbal F. Santos Júnior; Erik G. P. da Silva; Walter N. L. dos Santos

The inorganic antimony speciation in natural waters was evaluated by hydride generation atomic fluorescence spectrometry (HG AFS).

http://dx.doi.org/10.21577/0103-5053.20170129

Published online: July 7, 2017.

J. Braz. Chem. Soc. 2017

Synthesis and in vitro Antiproliferative Activity of Flavone and 6‑Hydroxyflavone Oxime Ethers Derivatives

John E. Díaz; Diana C. Martinez; Lina V. López; Gina M. Mendez; Ricardo Vera; Alix E. Loaiza

The synthesis of a series of O-alkyl oximes of flavone and 6-hydroxyflavone using a simple experimental protocol is reported. Cytotoxicity of all compounds was evaluated against MDA-MB-231, PC-3, A-549 and MRC-5 cells. The best IC50 value was obtained for 6-hydroxyflavone (3.4 μM) against MDA-MB-231.

http://dx.doi.org/10.21577/0103-5053.20170128

Published online: July 5, 2017.


J. Braz. Chem. Soc. 2017

Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR‑Chemometric Analysis

Patrícia M. Sanchez; Elis D. Pauli; Guilherme L. Scheel; Miroslava Rakocevic; Roy E. Bruns; Ieda S. Scarminio

Coffea arabica L. leaf extracts, grown under different environmental conditions, were analyzed by FTIR with chemometric tools. It was possible to discriminate leaves from different microclimates by bands related to carbohydrates, amino acids, lipids and caffeine.

http://dx.doi.org/10.21577/0103-5053.20170125

Published online: July 4, 2017.

Short Report J. Braz. Chem. Soc. 2017

New Method for Carotenoid Extraction and Analysis by HPLC-DAD-MS/MS in Freeze-Dried Citrus and Mango Pulps

Fabiane C. Petry; Adriana Z. Mercadante

A new fast methodology for extraction and quantitative analysis of carotenoids from freeze-dried orange and mango pulps was developed and validated. A detailed identification and quantification, by HPLC-DAD-MS/MS, of carotenoids detected in such matrices are also given.

http://dx.doi.org/10.21577/0103-5053.20170127

Published online: July 3, 2017.

Articles J. Braz. Chem. Soc. 2017

Synthesis of New Conjugates 1H‑Pyrazolo[3,4-b]pyridine-phosphoramidate and Evaluation against Leishmania amazonensis

Antonia C. R. F. Medeiros; Julio C. Borges; Klaus M. Becker; Raquel F. Rodrigues; Leonor L. Leon; Marilene Canto-Cavalheiro; Alice M. R. Bernardino; Marcos C. de Souza; Leandro F. Pedrosa

1H-Pyrazolo[3,4-b] pyridine phosphoramidates were synthesized and evaluated against Leishmania amazonensis promastigotes in vitro.

http://dx.doi.org/10.21577/0103-5053.20170126

Published online: July 3, 2017.


J. Braz. Chem. Soc. 2017

Potential Bio-Oil Production from Invasive Aquatic Plants by Microscale Pyrolysis Studies

Luana O. Santos; Fernanda F. Silva; Lidiane C. Santos; Ingred S. C. Carregosa; Alberto Wisniewski Jr.

Invasive aquatic plants like water hyacinth is one of the major rapid growth plant in the planet and represent a water environmental problem. Through micropyrolysis experiments we can evaluate the potential to use this biomass to produce biofuels or fine chemicals.

http://dx.doi.org/10.21577/0103-5053.20170124

Published online: June 29, 2017.

J. Braz. Chem. Soc. 2017

New Organomineral Complex from Humic Substances Extracted from Poultry Wastes: Synthesis, Characterization and Controlled Release Study

Amanda M. P. Santos; Alexandre C. Bertoli; Ana Carolina C. P. Borges; Raphael A. B. Gomes; Jerusa S. Garcia; Marcello G. Trevisan

The humic and fulvic acids extracted from poultry manure are complexed in Cu2+, Zn2+ and Fe2+ and taken to a release test in contact with buffer solution.

http://dx.doi.org/10.21577/0103-5053.20170122

Published online: June 28, 2017.


J. Braz. Chem. Soc. 2017

Synthesis of New trans-Dehydrocrotonin Nitrogenated Derivatives and their Cytotoxic and DNA-Topoisomerase I Inhibitory Activities

Andressa Esteves-Souza; Kenia Pissinate; Maria A. M. Maciel; Aurea Echevarria

Synthesis of new trans-dehydrocrotonin nitrogenated derivatives, and in vitro evaluation of cytotoxic, and DNA-topoisomerase I activities.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170121

Published online: June 27, 2017.


J. Braz. Chem. Soc. 2017

Nonanoic Acid-Coated Magnetite Nanoparticles for Separation and Preconcentration of Lead and Copper in Tobacco Samples prior to Flame Atomic Absorption Spectrometry Determination

Shouai Feng; Hong Liu; Jiangfeng Huang; Jingjing Wu; Kang Wei; Xiaolan Li; Dongling Meng; Jiao Zhao; Yaling Yang

Nonanoic acid-coated magnetic Fe3O4 nanoparticles were used as adsorbents for preconcentration and separation of Cu and Pb. Methanol-nitric acid was used as eluent for desorption of Cu and Pb, finally detected by flame atomic absorption spectrometry.

http://dx.doi.org/10.21577/0103-5053.20170120

Published online: June 27, 2017.

J. Braz. Chem. Soc. 2017

Design, Synthesis and Anticancer Biological Evaluation of Novel 1,4-Diaryl-1,2,3‑triazole Retinoid Analogues of Tamibarotene (AM80)

Mariana A. A. Aleixo; Taís M. Garcia; Diego B. Carvalho; Luiz H. Viana; Marcos S. Amaral; Najla M. Kassab; Marilin C. Cunha; Indiara C. Pereira; Palimécio G. Guerrero Jr.; Renata T. Perdomo; Maria F. C. Matos; Adriano C. M. Baroni

In this work, twelve novel 1,2,3-triazole retinoids analogues of tamibarotene (AM80) were synthesized, and biological activity was evaluated against human cancer cells.

http://dx.doi.org/10.21577/0103-5053.20170119

Published online: June 27, 2017.


J. Braz. Chem. Soc. 2017

End Functionalization by Ring Opening Polymerization: Influence of Reaction Conditions on the Synthesis of End Functionalized Poly(lactic Acid)

Luis P. Icart; Edson Fernandes; Lissette Agüero; Maelia Z. Cuesta; Dionisio Z. Silva; Daniel E. Rodríguez-Fernández; Fernando G. Souza Jr.; Luis Maurício T. R. Lima; Marcos L. Dias

Ring opening polymerization initiated by tin(II) 2-ethylhexanoate was used to introduce salicyl aldehyde and salicylic acid end groups in poly(lactic acid).

http://dx.doi.org/10.21577/0103-5053.20170118

Published online: June 26, 2017.


J. Braz. Chem. Soc. 2017

Heteropoly Tungstate Supported on Metal Oxide Catalysts for Liquid Phase Oxidation of Benzyl Alcohol with Hydrogen Peroxide

Han Xiaoxiang; Kuang Yingying; Xiong Chunhua; Tang Xiujuan; Chen Qing; Wang Kuiwu; Hung Chin-Te; Liu Li-Li; Liu Shang-Bin

Phosphotungstic acid supported ceria shows excellent catalytic activity for oxidation of benzyl alcohol to benzaldehyde due to Brønsted-Lewis acid synergy effect.

http://dx.doi.org/10.21577/0103-5053.20170117

Published online: June 26, 2017.


J. Braz. Chem. Soc. 2017

Investigation of Low-Temperature Selective Catalytic Reduction of NOx with Ammonia over Mn-Modified Fe2O3/AC Catalysts

Jiuyu Chen; Baozhong Zhu; Yunlan Sun; Shoulai Yin; Zicheng Zhu; Jiaxin Li

Catalytic activity profiles of 10FexMn/AC (x = 1, 3, 5) catalysts with different Fe and Mn molar ratios.

http://dx.doi.org/10.21577/0103-5053.20170116

Published online: June 26, 2017.

Short Report J. Braz. Chem. Soc. 2017

Continuous Monitoring of a Transesterification Reaction Using an Analytical Balance

Matthieu Tubino; Arnaldo G. Oliveira Júnior; Acacia A. Salomão

The image shows the system used to continuously monitor the transesterification reaction.

http://dx.doi.org/10.21577/0103-5053.20170115

Published online: June 26, 2017.

Articles J. Braz. Chem. Soc. 2017

Synthesis and Expansion of Bicyclic Enol Ether: A Probable Precursor for the Synthesis of Macrolide (±)-Pyrenophorin

Maísa B. Costa; Marcos P. Martins; Hugo C. de Araújo; Inês S. Resck

A new synthetic methodology is demonstrated to obtain potential precursors that may lead to the synthesis of (±)-pyrenophorin through the use of a convenient oxidative ring expansion.

http://dx.doi.org/10.21577/0103-5053.20170114

Published online: June 23, 2017.


J. Braz. Chem. Soc. 2017

Synergistic Interactions between Ti-OOH and (PO4[WO2(O2)]4)3- of HPW/Zn-Ti Hydrotalcites: Efficient Heterogeneous Catalysts for the Epoxidation of Fatty Acid Methyl Ester

Junjie Wang; Jing Cheng; Yu Zhou; Lei Meng; Yuehua Wang; Xiaoqian Ren; Jinhua Liang; Min Jiang

The HPW/Zn-Ti layered double hydroxides exhibited remarkable catalytic performance in the epoxidation of fatty acid methyl ester with H2O2.

http://dx.doi.org/10.21577/0103-5053.20170113

Published online: June 22, 2017.


J. Braz. Chem. Soc. 2017

Synergistic Effect of 4A Zeolite from Rice Husk Ash without Aging Time and Silane on the Adhesion Properties of a Warm Mix Asphalt

Paula C. Arroyo-Martínez; Norma A. Sánchez-Flores; María E. Villafuerte-Castrejón; Rodrigo Vivar-Ocampo

4A zeolite synthesized from rice husk by microwave-assisted hydrothermal synthesis without aging time increases the effect of the antistripping additive.

http://dx.doi.org/10.21577/0103-5053.20170112

Published online: June 21, 2017.

J. Braz. Chem. Soc. 2017

Effect of Acetonitrile and N,N-Dimethylformamide on the Formation of Poly(ethylene oxide)-Sodium Alkyl Sulfate Aggregates

Guilherme M. D. Ferreira; Gabriel M. D. Ferreira; Maria C. Hespanhol; Álvaro J. P. Agudelo; Jaqueline P. Rezende; Ana C. S. Pires; Luis H. M. Silva

Acetonitrile and N,N-dimethylformamide modify the water tridimensional structure in the solvation shells of sodium alkyl sulfates and poly(ethylene oxide) without altering the relative stability of the surfactant aggregates formed in the absence and in the presence of the polymer.

http://dx.doi.org/10.21577/0103-5053.20170111

Published online: June 20, 2017.


J. Braz. Chem. Soc. 2017

Simple and Fast Method for Identification and Quantification of Anthocyanidins in Berries by Ultra Performance Liquid Chromatography-Mass Spectrometry

Julianna M. Vagula; Nayane M. Sinosaki; Marcos A. S. Ribeiro; Thiago Magon; Janksyn Bertozzi; Eduardo C. Meurer; Oscar O. Santos Junior; Jesuí V. Visentainer

This work aim is to identify and quantify three different anthocyanidins in six different berries and shows the elucidation of a general fragmentation mechanism.

http://dx.doi.org/10.21577/0103-5053.20170110

Published online: June 19, 2017.


J. Braz. Chem. Soc. 2017

Improved Method for Preparation of Methoxy-Modified Kaolinite

Ding Wang; Qinfu Liu; Dandan Hou; Shuai Zhang; Peng Guo; Hongfei Cheng

Schematic representation of the transformation from Kaol to Kaol-BTAC. The time required for preparation of methoxy-modified Kaol was shortened by more than fifty percent, and the obtained products could be used for further process without any negative impact.

http://dx.doi.org/10.21577/0103-5053.20170109

Published online: June 14, 2017.


J. Braz. Chem. Soc. 2017

Aqueous Ultrasound-Assisted Extraction for the Determination of Fluoroquinolones in Mangrove Sediment by High-Performance Liquid Chromatography and Fluorescence Detector

Mônica A. Neves; Gilmar S. Silva; Natilene M. Brito; Karla C. M. Araújo; Edmar P. Marques; Lanna K. Silva

Analytical methodology for the determination of antibiotics in mangrove sediments in an estuarine system.

http://dx.doi.org/10.21577/0103-5053.20170108

Published online: June 13, 2017.

J. Braz. Chem. Soc. 2017

An Appraisal on the Source-to-Sink Relationship in Plants: an Application of Desorption Electrospray Ionization Mass Spectrometry Imaging

Julia R. L. Freitas; Pedro H. Vendramini; Júlio O. F. Melo; Marcos N. Eberlin; Rodinei Augusti

Chemical images of carbohydrates and amino acids/ureides generated from Mentha × piperita leaves at distinct maturation stages and obtained upon the application of the desorption electrospray ionization mass spectrometry imaging (DESI-MSI) technique.

http://dx.doi.org/10.21577/0103-5053.20170107

Published online: June 8, 2017.


J. Braz. Chem. Soc. 2017

Withanolides from Leaves of Nicandra physalodes

Diego A. S. Carrero; Pedro H. J. Batista; Luciana G. S. Souza; Francisco C. L. Pinto; Mayron A. de Vasconcelos; Edson H. Teixeira; Kirley M. Canuto; Gilvandete M. P. Santiago; Edilberto R. Silveira; Otília D. L. Pessoa

Five new withanolides, in addition to six others previously reported, were isolated and characterized from the leaf acetone extract of Nicandra physalodes.

http://dx.doi.org/10.21577/0103-5053.20170105

Published online: June 8, 2017.


J. Braz. Chem. Soc. 2017

Preparation and Performance of an Estradiol Templated Magnetic Sphere of Molecularly Imprinted Cryogel

Jian Wang; Lili Tian; Yanan Yan; Yaru Liu; Yan Zhang; Chun Yang

In this paper we describe the synthesis of estradiol templated magnetic molecularly imprinted cryogel. The excellent selective adsorption performance, solid phase extraction and chromatographic performances of the MMIC (magnetic molecularly imprinted cryogel) were investigated.

http://dx.doi.org/10.21577/0103-5053.20170104

Published online: June 7, 2017.


J. Braz. Chem. Soc. 2017

Anti-Trypanosoma Activity and Synergistic Effects of Natural and Semi-Synthetic Triterpenes and Predominant Cell Death through Autophagy in Amastigote Forms

Gleison D. P. Bossolani; Tânia Ueda-Nakamura; Sueli O. Silva; Benedito P. Dias Filho; Tulio O. G. Costa; Raúl H. R. Quintanilla; Sabrina T. Martinez; Valdir F. Veiga-Junior; Angelo C. Pinto; Celso V. Nakamura

Triterpenes showed promising activities and synergistic effects, which resulted in mitochondrial dysfunction and cell death by apoptosis, against amastigote forms of Trypanosoma cruzi.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170103

Published online: June 6, 2017.

J. Braz. Chem. Soc. 2017

Development and Validation of a Stability-Indicating Method for Perillyl Alcohol Incorporated in Poly(lactide-co-glycolide) Nanoparticles and Stress Degradation Studies

Breno M. Marson; Raquel O. Vilhena; Flavia L. D. Pontes; Najeh M. Khalil; Roberto Pontarolo

This study presents degradation studies, development and validation of an analytical method applied for both determination of perillyl alcohol encapsulation efficiency and evaluating the presence of related degradation products in polymeric nanoparticles formulation.

http://dx.doi.org/10.21577/0103-5053.20170102

Published online: June 6, 2017.

J. Braz. Chem. Soc. 2017

Evaluation of Distribution and Bioaccumulation of Arsenic by ICP-MS in Tilapia (Oreochromis niloticus) Cultivated in Different Environments

Luciano H. B. Oliveira; Nathália S. Ferreira; Andrea Oliveira; Ana Rita A. Nogueira; Mario H. Gonzalez

The arsenic levels found in different tissues of fish (tilapia) is an indicator of environment pollution and the different organs of the fish can influence the arsenic distribution and its bioaccumulation.

http://dx.doi.org/10.21577/0103-5053.20170101

Published online: June 5, 2017.

J. Braz. Chem. Soc. 2017

Biodiesel Glycerides from the Soybean Ethylic Route Incomplete Conversion on the Diesel Engines Combustion Process

Renato Cataluña; Zeban Shah; Leidimara Pelisson; Nattan R. Caetano; Rosângela da Silva; Carla M. N. Azevedo

Pressure differential in the filter element resulting from the retention of particulate matter (PM) as a function of the volume of sampled gas to diesel CN 50 and your formulation with 10MR, 20MR, 10ER and 20ER. Lower differential pressure according to the gas volume indicates lower retention of PM.

http://dx.doi.org/10.21577/0103-5053.20170100

Published online: June 5, 2017.

J. Braz. Chem. Soc. 2017

Simultaneous Determination of Nonylphenol and Nonylphenol Ethoxylates in Wastewater Samples from Biodegradation Process by High Performance Liquid Chromatography Method

Yuanhua Xie; Shiyu Ma; Chunli Yuan; Yahong Pan; Qiao Wang; Ye Xu; Tong Zhu; Youzhao Wang; Jin Han; Meiyan You

Under the optimized high performance liquid chromatography (HPLC) conditions, the NP and 11 kinds of NPnEO were separated and determined successfully within 35 min.

http://dx.doi.org/10.21577/0103-5053.20170099

Published online: June 2, 2017.

J. Braz. Chem. Soc. 2017

Evaluating the Potential of Biodiesel Production through Microalgae Farming in Photobioreactor and High Rate Ponds from Wastewater Treatment

David M. M. Pinho; Renato S. Oliveira; Vitor M. L. dos Santos; Welington F. Marques; Angelo C. Pinto; Michelle J. C. Rezende; Paulo A. Z. Suarez

The article evaluates farming of Chlorella sp. in photobioreactor and sewage sludge as potential source of fatty material for biodiesel production.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20170097

Published online: May 30, 2017.

J. Braz. Chem. Soc. 2017

Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples

Ya-Bing Xiong; Yue Zhao; Zhong-Hua Yang

Target analytes were extracted into extraction solvent from aqueous phase. Extraction, concentration, and purification were done in one step. After centrifugation, extraction solvent was sedimented at the bottom of the tube.

http://dx.doi.org/10.21577/0103-5053.20170096

Published online: May 26, 2017.

J. Braz. Chem. Soc. 2017

ITO Obtained by Spray Pyrolysis and Coating on Glass Substrate

Beatriz M. de Campos; Gabriela S. Freiria; Katia J. Ciuffi; Emerson H. de Faria; Lucas A. Rocha; Eduardo J. Nassar; Milton S. F. de Lima

Transparent thin films present optoelectronic or optical applications. Spray pyrolysis can yield spherical indium and tin oxide (ITO) micro- and nanoparticles. The sol-gel methodology affords conductive films.

http://dx.doi.org/10.21577/0103-5053.20170095

Published online: May 26, 2017.

J. Braz. Chem. Soc. 2017

Influence of the Transport of Sea Spray on the Salinization of the Semiarid Region Waters (Bahia, Brazil)

Adriana M. Silva; Vânia P. Campos; Rafaela S. Domingues; Lícia P. S. Cruz; Franciele O. Santana

The sea spray presence in the atmosphere of the Semiarid was investigated. The trajectories of air masses for each sampling period showed that the air mass that arrived in the region passed over the ocean. The sea spray amount which reaches the region is insufficient to salinize waters.

http://dx.doi.org/10.21577/0103-5053.20170094

Published online: May 26, 2017.


J. Braz. Chem. Soc. 2017

New Alternative to Produce Colored Polymer Nanocomposites: Organophilic Ni/Al and Co/Al Layered Double Hydroxide as Fillers into Low-Density Polyethylene

Silvia Jaerger; Sonia F. Zawadzki; Andreas Leuteritz; Fernando Wypych

Colored hydrophobic layered double hydroxides (LDH) with the formula M+20.25Al0.75(A)0.25.nH2O, where M+2 = Ni or Co and A = dodecylsulfate, laurate, palmitate and stearate were synthesized and used as fillers in low density polyethylene. The influence of the metal in the LDH layers and the intercalated specie in the nanocomposites properties were discussed

http://dx.doi.org/10.21577/0103-5053.20170093

Published online: May 25, 2017.


J. Braz. Chem. Soc. 2017

Spatial and Temporal Variations in Secondary Metabolites Content of the Brazilian Arnica Leaves (Lychnophora ericoides Mart., Asteraceae)

Leonardo Gobbo-Neto; Anelize Bauermeister; Humberto T. Sakamoto; Dayana R. Gouvea; João Luis C. Lopes; Norberto P. Lopes

The spatial and temporal variations in the secondary metabolites from Lychnophora ericoides were investigated. Chlorogenic acids presented highest concentrations in the dry season, while flavonoids were higher in the rainy season. Lower concentrations were found for all metabolites in flowery branches and old leaves.

http://dx.doi.org/10.21577/0103-5053.20170092

Published online: May 25, 2017.


J. Braz. Chem. Soc. 2017

Combination of Propylene Glycol Alginate and Lauric Acid on Water Retention and Mechanical Properties of Soy Protein Isolate-Based Films

Yi Liu; Hongyang Pan; Tougen Liao; Baokun Zhu; Zhiyu Li; Jiacan Wu; Yuandong Li; Jibao Cai; Mingfeng Wang

Higher water retention ability and a single glass transition temperature (Tg) were found in ternary co-dried blending films when propylene glycol alginate (PGA) was added by a co-drying process. A single Tg indicates the compatibility of soy protein isolate (SPI), PGA and lauric acid (La). Differential scanning calorimetry scans showed higher relative humidity (RH) and reduced Tg due to incorporation of La.

http://dx.doi.org/10.21577/0103-5053.20170090

Published online: May 23, 2017.

J. Braz. Chem. Soc. 2017

Effect of Endophytic Fungal Associations on the Chemical Profile of in vitro Vochysia divergens Seedlings

Bruna A. S. Parpinelli; Katia A. Siqueira; Luis C. Kellner Filho; Letícia P. Pimenta; Ricardo M. da Costa; Renato L. T. Parreira; Rodrigo C. S. Veneziani; Marcio L. Andrade e Silva; Wilson R. Cunha; Patrícia M. Pauletti; Marcos A. Soares; Ana H. Januario

Chemical profile by HPLC-DAD of leaves extracts from V. divergens seedlings inoculated with endophytic fungi isolated from V. divergens roots on dry and wet seasons in the Pantanal.

http://dx.doi.org/10.21577/0103-5053.20170091

Published online: May 24, 2017.


J. Braz. Chem. Soc. 2017

Determination of Selenium in Bovine Semen by ICP-MS Using Formic Acid for Sample Preparation

Silmara R. Bianchi; Clarice D. B. Amaral; Caroline S. Silva; Ana Rita A. Nogueira

A simple and fast procedure for Se determination in bovine semen by ICP-MS after sample solubilization with diluted formic acid.

http://dx.doi.org/10.21577/0103-5053.20170089

Published online: May 23, 2017.

J. Braz. Chem. Soc. 2017

Separation and Identification of Functional Groups of Molecules Responsible for Fluorescence of Biodiesel Using FTIR Spectroscopy and Principal Component Analysis

Humbervânia R. G. da Silva; Cristina M. Quintella; Marilena Meira

Infrared spectroscopy coupled with principal component analysis allowed discriminating the fractions and identifying the functional groups of compounds present in the sample.

http://dx.doi.org/10.21577/0103-5053.20170088

Published online: May 18, 2017.


Short Report J. Braz. Chem. Soc. 2017

A Low-Cost Video-Based Reflectometer for Selective Detection of Cu2+ Using Paper‑Based Colorimetric Sensors

Camilo L. M. Morais; Lilian C. da Silva; Nayara A. Pinheiro; Fabrício G. Menezes; Kássio M. G. Lima

A low-cost video-based reflectometer device was developed to quantify Cu2+ using paper-based colorimetric sensors.

http://dx.doi.org/10.21577/0103-5053.20170087

Published online: May 17, 2017.


J. Braz. Chem. Soc. 2017

Colorimetric Determination of Ascorbic Acid Based on Its Interfering Effect in the Enzymatic Analysis of Glucose: An Approach Using Smartphone Image Analysis

Mayra S. Coutinho; Camilo L. M. Morais; Ana C. O. Neves; Fabrício G. Menezes; Kássio M. G. Lima

A new method using smartphone image analysis for quantification of ascorbic acid (AA) in vitamin C tablets is described. The method is based on AA interfering effect in enzymatic colorimetric detection of glucose.

http://dx.doi.org/10.21577/0103-5053.20170086

Published online: May 17, 2017.

Articles J. Braz. Chem. Soc. 2017

Exploiting Cork as Biosorbent Extraction Phase for Solid-Phase Microextraction to Determine 3-(4-Methylbenzylidene)camphor and 2-Ethylhexyl 4-(Dimethylamino)benzoate in River Water by Gas Chromatography-Mass Spectrometry

Ana C. Silva; Adriana N. Dias; Eduardo Carasek

This study is related to the use of cork as a material of natural origin, renewable and biodegradable for the determination of two classes of UV filters in water samples. The results showed good extraction efficiency, as well as satisfactory analytical performance.

http://dx.doi.org/10.21577/0103-5053.20170085

Published online: May 17, 2017.


J. Braz. Chem. Soc. 2017

New 9-Aminoacridine Derivative: Synthesis, Study and Potential Application as pH Indicator in Organic Solvents

Pedro H. F. Stroppa; Nícolas Glanzmann; Lucas M. Duarte; Renata T. Sato; Marcone A. L. de Oliveira; Adilson D. da Silva

Optimized TNA structures in ethanol: their HOMO/LUMO molecular orbitals and different colors according to the mediums.

http://dx.doi.org/10.21577/0103-5053.20170084

Published online: May 15, 2017.


J. Braz. Chem. Soc. 2017

Application of Factorial Design for Optimization of the Synthesis of Lactulose Obtained from Whey Permeate

Fernanda C. Zimmer; Aloisio H. P. Souza; Ana F. C. Silveira; Maristela R. Santos; Makoto Matsushita; Nilson E. Souza; Angela C. Rodrigues

Response surface for the concentration of lactulose according to the type of isomerization and reaction time.

http://dx.doi.org/10.21577/0103-5053.20170083

Published online: May 10, 2017.


J. Braz. Chem. Soc. 2017

Natural Organic Acid as Green Catalyst for Xanthenones Synthesis: Methodology, Mechanism and Calcium Channel Blocking Activity

Bruna S. Terra; Aura M. B. Osorio; Aline de Oliveira; Rebeca P. M. Santos; Andressa P. Mouro; Natália F. de Araújo; Cameron C. da Silva; Felipe T. Martins; Luciene B. Vieira; Daniella Bonaventura; Heitor A. de Abreu; Antonio F. C. Alcântara; Ângelo de Fátima

Natural organic acids (NOAs) were efficient as green catalysts for the eco-friendly synthesis of xanthenones (up to 93% of yield) via one-pot tricomponent reaction and under solvent-free conditions. Theoretical calculations to evaluate this reaction mechanism and regioselectivity as well as the potential anti-calcium blockers properties of xanthenones were described.

http://dx.doi.org/10.21577/0103-5053.20170082

Published online: May 9, 2017.


J. Braz. Chem. Soc. 2017

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

José O. Marques Neto; Carlos R. Bellato; Carlos H. F. de Souza; Renê C. da Silva; Pablo A. Rocha

The 10-Fe/MWCNT/TiO2-Ag-9 catalyst presents higher activity under longer wavelength light than pure TiO2. With good stability after 10 cycles, the catalyst has promising potential for practical applications.

http://dx.doi.org/10.21577/0103-5053.20170081

Published online: May 5, 2017.


J. Braz. Chem. Soc. 2017

Application of Response Surface Modeling and Chemometrics Methods for the Determination of Ofloxacin in Human Urine Using Dispersive Liquid-Liquid Microextraction Combined with Spectrofluorimetry

Farah Assadian; Ali Niazi

Dispersive liquid-liquid microextraction (DLLME) and spectrofluorimeter coupled with chemometrics methods were applied for trace determination of ofloxacin in urine sample. Three-dimensional multivariate calibration was used for analysis of DLLME data.

http://dx.doi.org/10.21577/0103-5053.20170080

Published online: May 4, 2017.

J. Braz. Chem. Soc. 2017

Rare Earth-Indomethacinate Complexes with Heterocyclic Ligands: Synthesis and Photoluminescence Properties

João Batista M. Resende Filho; Paulo R. Santos; Juliana A. Vale; Wagner M. Faustino; Danyelle S. Farias; Hermi F. Brito; Maria C. F. C. Felinto; Ercules E. S. Teotonio

Photophysical properties of the complexes were evaluated from luminescence data. It is proposed two intramolecular energy transfer mechanisms, which involve the participation of excited electronic states of the heterocyclic ligands as intermediate ones.

http://dx.doi.org/10.21577/0103-5053.20170079

Published online: May 3, 2017.

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