19:46, Sun Jul 23

Open Access/APCs

Forthcoming Papers - 2017

Articles published online ahead of print

Manuscripts published online ahead of print

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.


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.


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.


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.


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.


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.


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.


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+.


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.


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.


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).


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).


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.


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.


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.


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.


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.


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.


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.


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.


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.


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).


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.


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.


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.


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.


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.


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.


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.


Published online: June 20, 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.


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.


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.


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.


Published online: June 8, 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.


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.


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.


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.


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.


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.


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.


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.


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.


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


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.


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.


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.


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.


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.


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.


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.


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.


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.


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.


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.


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.


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.


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.


Published online: May 3, 2017.

J. Braz. Chem. Soc. 2017

Rate Coefficient for the Reaction of Cl Atoms with cis-3-Hexene at 296 ± 2 K

Thaís S. Barbosa; Javier A. Barrera; Rafael Jara Toro; Glauco F. Bauerfeldt; Graciela Arbilla; Silvia I. Lane

The rate coefficient of the cis-3-hexene + Cl atoms reaction was determined by the relative rate technique using trichloroacetyl chloride to produce chlorine atoms.


Published online: May 3, 2017.

J. Braz. Chem. Soc. 2017

Synthesis and Characterization of LiCoO2 from Different Precursors by Sol‑Gel Method

Bruno G. A. Freitas; José M. Siqueira Jr.; Leonardo M. da Costa; Glaucio B. Ferreira; Jackson A. L. C. Resende

HT-LiCoO2 synthesized by sol-gel method with the citric acid, starch, glycine and gelatin complexing agents to obtain the rhombohedral crystalline system of the Rm space group.


Published online: April 27, 2017.

J. Braz. Chem. Soc. 2017

Synthetic Niobium Oxyhydroxide as a Bifunctional Catalyst for Production of Ethers and Allyl Alcohol from Waste Glycerol

Henrique S. Oliveira; Jarbas M. Resende; Patterson P. Souza; Patricia S. O. Patrício; Luiz C. A. Oliveira

Glycerol products in volatile fraction and condensed fraction using niobium oxyhydroxide as catalyst.


Published online: April 27, 2017.

J. Braz. Chem. Soc. 2017

Synthesis, Characterization and in vitro Anticancer Activity of Novel 8,4'-Oxyneolignan Analogues

Gisele C. Souza; Gilberto C. Franchi Jr.; Alexandre E. Nowill; Lourivaldo S. Santos; Cláudio N. Alves; Lauro E. S. Barata; Carlos K. Z. Andrade

A new subclass of 8,4'-oxyneolignans presented a promising antiproliferative activity against human cancer cells.


Published online: April 26, 2017.

J. Braz. Chem. Soc. 2017

Chiral Bistacrine Analogues: Synthesis, Cholinesterase Inhibitory Activity and a Molecular Modeling Approach

João P. B. Lopes; Jessie S. da Costa; Marco A. Ceschi; Carlos A. S. Gonçalves; Eduardo L. Konrath; Ana L. M. Karl; Isabella A. Guedes; Laurent E. Dardenne

Chiral bis(7)-tacrine compounds were synthesized in yields ranging from 40 to 80%. Both enantiomeric series were found to be potent AChE and BuChE inhibitors in vitro, with IC50 values ranging from 2 to 16 nM and from 30 to 140 nM, respectively.

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


Published online: April 25, 2017.

J. Braz. Chem. Soc. 2017

Rice Husk Ash as Raw Material for the Synthesis of Silicon and Potassium Slow‑Release Fertilizer

Amanda A. França; Juliana Schultz; Roger Borges; Fernando Wypych; Antonio S. Mangrich

Rice husk ash was used to synthesize a silicon and potassium slow-release fertilizer. The method is an attractive way of enabling the reuse of a waste.


Published online: April 18, 2017.

J. Braz. Chem. Soc. 2017

Investigation on Prospective Energy Power from Corncob Husk Biomass and its Biochars by Kinetic Parameters and Isoconversional Models

Carolina C. Bueno; Amanda A. D. Maia; Leandro C. de Morais; André H. Rosa

Corncob husk biomass requires low input of energy on pyrolysis to be produced and it is an indicator for worthy carbon based biofuels. Some biochars are prone to oxidation reactions.


Published online: April 17, 2017.

J. Braz. Chem. Soc. 2017

J. Braz. Chem. Soc. 2017

J. Braz. Chem. Soc. 2017

Synergistic Effect of Adsorption and Enzymatic Conversion in the Bisphenol-A Removal by Laccase Immobilized on Poly(glycidyl methacrylate-co-ethyleneglycol dimethacrylate)

Claudinei F. Melo; Leandro A. Silva; Luciana C. Costa; Monica R. C. Marques

Synthesis of the resin after diazotization and the mechanisms of removal of bisphenol-A by adsorption and enzymatic oxidation.


Published online: April 13, 2017.

J. Braz. Chem. Soc. 2017

The Influence of Methoxy and Ethoxy Groups on Supramolecular Arrangement of Two Methoxy-chalcones

Jean M. F. Custodio; Eduardo C. M. Faria; Lóide O. Sallum; Vitor S. Duarte; Wesley F. Vaz; Gilberto L. B. de Aquino; Paulo S. Carvalho Jr.; Hamilton B. Napolitano

What is the influence of substituents on methoxy-chalcones? A combined structural and theoretical investigation.


Published online: April 10, 2017.

J. Braz. Chem. Soc. 2017

Pre-Concentration and Separation of Perphenazine Using Picric Acid Loaded α-Fe2O3 Nanoparticles: HPLC Syringe Filter as the Particles Support

Zahra Ramezani; Marzieh Shekarriz; Abdol Azim Behfar; Somayeh Kiamarzi

Picric acid loaded iron oxide nanoparticles were retained on HPLC (high-performance liquid chromatography) syringe disk and used as SPE (solid phase extraction) sorbent for perphenazine pre-concentration and clean up.


Published online: April 7, 2017.

J. Braz. Chem. Soc. 2017

In vitro Monitoring of Macro and Microelements in Multimineral Preparations across Dissolution Profiles by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES)

Aníbal de F. Santos Júnior; Ramon R. Sá; Laiana O. B. Silva; Hemerson I. F. Magalhães; Taiana B. Tarantino; Maria Graças A. Korn

The metal content across dissolution profiles of five multivitamin supplements was evaluated by inductively coupled plasma optical emission spectrometry (ICP OES).


Published online: April 7, 2017.

J. Braz. Chem. Soc. 2017

Synthesis and Evaluation of Cytotoxic Effects of Amino-ester Derivatives of Natural α,β-Amyrin Mixture

Mauricio M. Victor; Jorge M. David; Marcelo A. S. dos Santos; André L. B. S. Barreiros; Marizeth L. Barreiros; Fernanda S. Andrade; Adriana A. Carvalho; Maria Claudia S. Luciano; Manoel O. de Moraes; Francisco W. A. Barros-Nepomuceno; Claudia Pessoa

Natural α,β-amyrin mixtures isolated from Esenbeckia grandiflora were transformed into aminoesters and their cytotoxic activities were evaluated against PC-3, HCT-116 and HL-60 tumor cells. Diethyl, aniline, morpholine and imidazole derivatives showed moderate activity against HL60.

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


Published online: April 6, 2017.

J. Braz. Chem. Soc. 2017

Illicit Drugs, Metabolites and Adulterants in Wastewater: Monitoring Community Drug Abuse in the Brazilian Federal District during the 2014 Soccer World Cup

Fernando F. Sodré; Gustavo B. Souza; Rafael S. Feitosa; Carlos Eduardo B. Pereira; Adriano O. Maldaner

Wastewater analyses indicate high cocaine consumption during Soccer World Cup as well as different forms of used cocaine.


Published online: April 3, 2017.

J. Braz. Chem. Soc. 2017

Allergenic Fragrances Analysis in Brazilian Perfumes by Headspace Solid Phase Microextraction and Gas Chromatography-Mass Detector (HS-SPME-GC-MS)

Clêrton L. Gomes; Ari C. A. de Lima; Pablo G. A. Barbosa; Rouse S. Costa; Diego Q. Melo; Ronaldo F. Nascimento

The image depicts the first step of sample preparation process starting from the extraction of volatile perfume by solid phase microextraction (SPME) in headspace mode with subsequent identification and quantification by gas chromatography mass spectrometry (GC-MS).


Published online: March 31, 2017.

J. Braz. Chem. Soc. 2017

Conformational Analysis, Experimental and GIAO-DFT 13C NMR Chemical Shift Calculation on 2'-Hydroxy-3,4,5-trimethoxy-chalcone

Fabio Luiz P. Costa; Paulo F. Gomes; Andressa K. Silva; Luciano M. Lião

Experimental and computational data: a robust protocol to complete 13C NMR chemical shifts assignment of substituted chalcones.


Published online: March 31, 2017.

Short Report J. Braz. Chem. Soc. 2017

Phenylethylpyranone and Aristolochic Acid Derivatives from Aristolochia urupaensis

Juliana C. Holzbach; Isabele R. Nascimento; Lucia M. X. Lopes

A new pyranone and three new aristolochic acid derivatives were isolated from Aristolochia urupaensis stems together with 31 known compounds.


Published online: March 27, 2017.

Articles J. Braz. Chem. Soc. 2017

A Potential Visible-Light NO Releaser: Synthesis, Reactivity and Vasodilator Properties

Aurideia P. de Sousa; André F. Fernandes; Iury A. Paz; Nilberto R. F. Nascimento; Javier Ellena; Eduardo H. S. Sousa; Luiz G. F Lopes; Alda K. M. Holanda

A new ruthenium nitrosyl complex containing benzoylpyridine ligand showed promising visible light induced release of NO and vasodilation activity.


Published online: March 27, 2017.

J. Braz. Chem. Soc. 2017

Strategies for the Efficient Synthesis of Biheterocyclic 5-[2-(Trifluoromethylheteroaryl)-ethyl]-1,3,4-oxadiazoles from Levulinic Acid

Juliana L. Malavolta; Leandro M. Frigo; Sidnei Moura; Darlene C. Flores; Alex F. C. Flores

New ethylene-spaced biheterocyclic 5-[2-(trifluoromethyl heteroaryl)-ethyl]-1,3,4-oxadiazoles were synthesized by two consecutive cyclocondensations from methyl 7,7,7-trifluoro-4-methoxy-6-oxo-4-heptenote derived from the renewable levulinic acid.


Published online: March 24, 2017.

J. Braz. Chem. Soc. 2017

Lipophilicity Study of 1-(Benzofuran-2-yl)ethan-1-one Oxime and its Substituted O-Benzyl Ethers

Tomasz Kosmalski; Renata Studzińska; Małgorzata Redka; Robert Pluskota; Bożena Modzelewska-Banachiewicz

Lipophilicity parameters for 1-(benzofuran-2-yl)ethan-1-one oxime and its nine biological active ethers were evaluated using reversed phase high performance liquid chromatography (RP-HPLC) method. The log kw lipophilicity parameters were compared with computed log P values using methanol, 2-propanol and acetonitrile as organic modifier of the mobile phases.


Published online: March 24, 2017.

J. Braz. Chem. Soc. 2017

An Environmental Friendly Flow-Injection Procedure for On Line Extraction and Spectrophotometric Determination of Gossypol in Cottonseed Meal

Bianca Daminato; Marcos Y. Kamogawa; Wanessa R. Melchert

A fast, simple, inexpensive and green flow analysis procedure for the determination of gossypol in cottonseed meal.


Published online: March 24, 2017.

J. Braz. Chem. Soc. 2017

Antifungal Properties of High Efficient W/WO3 Electrodes Acting under UV-Vis and Visible Light and Chloride Medium

Barbara C. A. Souza; Thais T. Guaraldo; Michelle F. Brugnera; Regina H. Pires; Maria J. S. M. Giannini; Maria V. B. Zanoni

Fast inactivation of C. parapsilosis by photoelectrocatalysis. The attack of HO∙ radicals to the cell wall of the fungus promotes rapid death and high degradation of organic compounds from the cell lyse. Photoelectrocatalysis is an efficient alternative to threat wastewater with high chloride content containing fungus.


Published online: March 21, 2017.

J. Braz. Chem. Soc. 2017

Structural Invariance of a ZnII Coordination Polymer with 5-Aminoisophthalic Acid under Different Synthetic Conditions

Iara M. L. Rosa; Ana C. Z. dos Santos; Luana A. R. Giusto; Carlos B. Pinheiro; Antonio C. Doriguetto

Synthesis of coordination polymer [Zn(aip)(DMSO)] (aip: 5-aminoisophthalate and DMSO: dimethylsulfoxide) using several synthetic conditions, which show the high stability and structural invariance of the network.


Published online: March 21, 2017.

J. Braz. Chem. Soc. 2017

Cellulose Oxidation and the Use of Carboxyl Cellulose Metal Complexes in Heterogeneous Catalytic Systems to Promote Suzuki-Miyaura Coupling and C−O Bond Formation Reaction

Guilherme B. C. Martins; Marcelo R. dos Santos; Marcus V. R. Rodrigues; Renata R. Sucupira; Luisa Meneghetti; Adriano L. Monteiro; Paulo A. Z. Suarez

Application of metal-modified cellulose as ligand in heterogeneous catalytic systems of coupling reactions as a new option for green and sustainable chemistry.

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


Published online: March 14, 2017.

J. Braz. Chem. Soc. 2017

Synthesis, Anti-Diabetic and Renoprotective Activity of Some New Benzazole, Thiazolidin-4-one and Azetidin-2-one Derivatives

Ahmed Abdou O. Abeed; Mohamed Salah K. Youssef; Rehab Hegazy

A new series of heterocycles were synthesized. Some of these compounds were evaluated for their anti-hyperglycemic and renoprotective activity.


Published online: March 14, 2017.

J. Braz. Chem. Soc. 2017

DLLME-GC/ECD Method for the Residual Analysis of Parathion-Methyl and its Application in the Study of the UV-Photodegradation Process

Gustavo G. Pimenta; Maria E. L. R. de Queiroz; Raquel P. D. Victor; Luiz M. Noronha; Antônio A. Neves; André F. de Oliveira; Fernanda F. Heleno

A DLLME-GC/ECD was optimized and validated to analyze the parathion-methyl in water and evaluate its UV-photodegradation.


Published online: March 14, 2017.

J. Braz. Chem. Soc. 2017

An Automated Multicommuted Flow Analysis Procedure for Photometric Determination of Reducing Sugars in Wine Employing a Directly Heated Flow‑Batch Device

Marcos A. S. Brasil; Boaventura F. Reis

Diagram of the setup for reducing sugar determination in wines.


Published online: March 10, 2017.

J. Braz. Chem. Soc. 2017

Composite Superabsorbent Hydrogel of Acrylic Copolymer and Eggshell: Effect of Biofiller Addition

Marcos Vinícius A. Queirós; Maslândia N. Bezerra; Judith P. A. Feitosa

The addition of eggshell to an acrylic copolymer improves the gel strength and the water absorption and also provides a more useful destination for the residue.


Published online: March 9, 2017.

J. Braz. Chem. Soc. 2017

Synthesis of TiO2/SiO2-B2O3 Ternary Nanocomposites: Influence of Interfacial Properties on their Photocatalytic Activities with High Resolution Mass Spectrometry Monitoring

Susana F. Resende; Rafael L. Gouveia; Bernardo S. Oliveira; Wander L. Vasconcelos; Rodinei Augusti

Summary of the process used to synthesize the TiO2/SiO2-B2O3 ternary nanocomposites.


Published online: March 6, 2017.

J. Braz. Chem. Soc. 2017

Boron Isotopic Ratio in Brazilian Red Wines: a Potential Tool for Origin and Quality Studies?

Cibele M. S. de Almeida; Ana Cristina Almeida; Tatiana D. Saint'Pierre; José Marcus Godoy

Boron isotopic composition was applied as a tool to differentiate among Brazilian red wine origin. The results have demonstrated that is possible to discriminate between wines produced on the Southern region from those produced on São Francisco Valley and also between the Brazilian red wines from Chilean, Italian and Portuguese wines.


Published online: March 6, 2017.

J. Braz. Chem. Soc. 2017

Using Magnetized (Fe3O4 / Biochar Nanocomposites) and Activated Biochar as Adsorbents to Remove Two Neuro-Active Pesticides from Waters

Tassya T. S. Matos; Juliana Schultz; Muhammad Y. Khan; Everton F. Zanoelo; Antônio S. Mangrich; Bruno R. Araújo; Sandro Navickiene; Luciane P. C. Romão

Biochars prepared from exhausted husk (EH) and tannin (TAN) derived from black wattle were used to remove thiacloprid (TCL) and thiamethoxam (TMX) agrotoxics from spiked sample of the Marcela Dam, a natural reservoir in Itabaiana Municipality, Sergipe State, Brazil.


Published online: March 3, 2017.

J. Braz. Chem. Soc. 2017

Application of Full Factorial Design to Evaluate the Effect of Different Variables on the Stability of Biodiesel:Diesel Blends under Storage Conditions

Michelle J. C. Rezende; Daniella L. Vale; Paula F. Aguiar; Carlos A. S. Riehl; Debora A. Azevedo

The stability of biodiesel:diesel blends were studied in actual Brazilian storage conditions. The degradation was quantified by target compounds in the oxidation process and a full factorial design evaluated the effect of variables.

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


Published online: February 24, 2017.

J. Braz. Chem. Soc. 2017

Determination of Rare Earth Elements in Some Flower Herb Teas and their Infusions

Zhanglin Ni; Chuanyi Ren; Junyong Cheng; Fubin Tang

The sixteen rare earth elements content in twelve types of popular flower herb teas and their infusions consumed in China was evaluated by ICP-MS.


Published online: February 23, 2017.

J. Braz. Chem. Soc. 2017

New Design of Mini PTFE Vessels for Sample Preparation in Micro Scale: Determination of Cd, K, Mg and Na in Biological Sample

Camila M. Oliz; Alexander O. Souza; Camila C. Pereira; Richard M. Oliveira; Aline L. Medina; Mariana A. Vieira; Anderson S. Ribeiro; Adriane M. Nunes

The new mini PTFE vessel was evaluated as a potential system for the preparation of biological samples and subsequent determination of metals.


Published online: February 22, 2017.

J. Braz. Chem. Soc. 2017

A Novel Nanofibrous Film Chemosensor for Highly Selective and Sensitive Optical Signaling of Zn2+

Chen Zhou; Heng Liu

Recognition mechanism of the nanofibrous film chemosensor for Zn2+.


Published online: February 20, 2017.

Short Report J. Braz. Chem. Soc. 2017

Synthesis of Diiodo-Functionalized Benzo[b]furans via Electrophilic Iodocyclization

Carlise Frota; Allan F. C. Rossini; Gleison A. Casagrande; Lucas Pizzuti; Cristiano Raminelli

Diiodo-functionalized benzo[b]furans were achieved through a simple electrophilic iodocyclization reaction involving alkynylated
2-iodoanisoles and molecular iodine in the presence of sodium bicarbonate.


Published online: February 20, 2017.

Articles J. Braz. Chem. Soc. 2017

Effects of Iron Enrichment of Adzuki Bean (Vigna angularis) Sprouts on Elemental Translocation, Concentrations of Proteins, Distribution of Fe-Metalloproteins, and Fe Bioaccessibility

Aline P. de Oliveira; Juliana Naozuka

Enrichment effects with different iron species on translocation of this element, chemical composition (essential elements, proteins and Fe-proteins) and Fe bioaccessibility.


Published online: February 17, 2017.

Short Report J. Braz. Chem. Soc. 2017

Synthesis, Inhibition of Mycobacterium tuberculosis Enoyl-acyl Carrier Protein Reductase and Antimycobacterial Activity of Novel Pentacyanoferrate(II)‑isonicotinoylhydrazones

Thais P. Gazzi; Mariane Rotta; Anne D. Villela; Valnês Rodrigues-Junior; Leonardo K. B. Martinelli; Francisco Adilson M. Sales; Eduardo Henrique Silva de Sousa; Maria Martha Campos; Luiz Augusto Basso; Diógenes S. Santos; Pablo Machado

The pentacyanoferrate(II)-isonicotinoylhydrazones inhibited the reaction catalyzed by Mycobacterium tuberculosis 2-trans-enoyl-ACP(CoA) reductase (MtInhA), showed antitubercular activity against M. tuberculosis H37Rv strain with no apparent toxicity to mammalian cells and presented intracellular activity in a macrophage model of infection.


Published online: February 17, 2017.

Articles J. Braz. Chem. Soc. 2017

Synthesis of New Xanthenes Based on Lawsone and Coumarin via a Tandem Three‑Component Reaction

Mariana F. C. Cardoso; Luana S. M. Forezi; Victor G. S. Cavalcante; Cecília S. R. Juliani; Jackson Antônio L. C. Resende; David R. da Rocha; Fernando C. da Silva; Vitor F. Ferreira

The synthesis of several xanthenes based on the 1,3-dicarbonyl scaffolds lawsone and coumarin was developed using tandem three-component reactions involving the reagents ortho-hydroxybenzaldehyde, as bifunctional reagent, and an appropriate thiol. These reactions generated two series of para- and ortho-naphthoxanthenes that are structurally related to β- and β-pyranaphthoquinones and one series of coumarin-xanthene derivatives.

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


Published online: February 16, 2017.

J. Braz. Chem. Soc. 2017

Nuclear Magnetic Resonance (1.40 T) and Mid Infrared (FTIR-ATR) Associated with Chemometrics as Analytical Methods for the Analysis of Methyl Ester Yield Obtained by Esterification Reaction

Sara R. M. Kollar; Etelvino H. Novotny; Claudia J. do Nascimento; Paulo A. Z. Suarez

1H NMR (60 and 300 MHz) and FTIR-ATR associated with chemometrics were used to quantify esterification of fatty acids with methanol.

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


Published online: February 15, 2017.

J. Braz. Chem. Soc. 2017

Isolation and Structural Characterization of Two New Furanoditerpenes from Pterodon emarginatus (Fabaceae)

Leandra A. R. Oliveira; Gerlon A. R. Oliveira; Geralda F. Lemes; Wanderson Romão; Boniek G. Vaz; Sérgio Albuquerque; Cristiana Gonçalez; Luciano M. Lião; Maria Teresa F. Bara

Two new furanoditerpenes were obtained from Pterodon emarginatus. Methyl 6α-acetoxy-7β-hydroxyvouacapan-17β-oate (previously identified) showed leishmanicidal activity.


Published online: February 15, 2017.

J. Braz. Chem. Soc. 2017

Volatile Compounds from the Bark Bugs Phloea subquadrata and Phloeophana longirostris (Heteroptera: Phloeidae)

Francine S. A. da Fonseca; Adriana T. Salomão; João Vasconcellos-Neto; Thiago I. B. Lopes; Anita J. Marsaioli

The volatile compounds differed both within and between Phloeidae species. Some compounds were sex specific, and others were characteristic of different developmental stages.

This article is part of the Special Issue BIOprospecTA-BIOTA.


Published online: February 14, 2017.

Short Report J. Braz. Chem. Soc. 2017

"Sweet Chemistry": a Green Way for Obtaining Selenium Nanoparticles Active against Cancer Cells

Adriana P. Vieira; Erika M. Stein; Daniel X. Andreguetti; Gerardo Cebrián‑Torrejón; Antonio Doménech-Carbó; Pio Colepicolo; Ana Maria D. C. Ferreira

A clean synthesis was developed to prepare selenium nanoparticles using fructose as the reducing agent. The obtained nanoparticles presented high toxicity toward cancer cells, and on the contrary are not toxic against human P4 fibroblasts.


Published online: February 13, 2017.

Articles J. Braz. Chem. Soc. 2017

On the Fluorescent, Steric and Electronic Factors Affecting the Detection of Metallic Ions Using an Imidazolyl-Phenolic Derived Fluorescent Probe

Ronaldo B. Orfão Jr.; Fabrício de Carvalho; Paula Homem-de-Mello; Fernando H. Bartoloni

Addition of CuII or FeIII switches OFF the probe emission, but FeIII also induces the formation of a fluorescent coordinated compound (switch ON).


Published online: February 10, 2017.

J. Braz. Chem. Soc. 2017

Commercial and Noncommercial Peroxidases Activity under Ultrasound and Microwave Treatment: a Pretreatment to Improve Wastewater Treatment

Simone M. Golunski; Thamarys Scapini; Tatiani Andressa Modkovski; Camila T. Marques; Aline F. Camargo; Karina Paula Preczeski; Camila Dalla Rosa; Daiane P. Baldissarelli; Jéssica Mulinari; Bruno Venturin; Gean D. L. P. Vargas; Jaqueline G. Buffon; Altemir José Mossi; Helen Treichel

Using a power of 30% and a temperature of 55 °C an increase in relative activity of 147.9% in the enzyme from soybean meal was obtained.


Published online: February 10, 2017.

J. Braz. Chem. Soc. 2017

Polypyridyl Ruthenium Complexes: Novel DNA-Intercalating Agents against Human Breast Tumor

João P. Barolli; Rodrigo S. Corrêa; Fabio S. Miranda; Juliana U. Ribeiro; Carlos Bloch Jr.; Javier Ellena; Virtudes Moreno; Márcia R. Cominetti; Alzir A. Batista

Ruthenium(II) complexes with the extended planar ligand [dipyrido[3,2-a:2′,3′-c]quinoxaline[2,3-b]quinoxaline)] have been synthesized and shown to be active against breast tumor cells (MDA-MB 231 and MCF-7).


Published online: February 7, 2017.

J. Braz. Chem. Soc. 2017

Multi-gram Preparation of 7-Nitroquinoxalin-2-amine

Daniel N. do Amaral; Fernando R. de Sá Alves; Eliezer J. Barreiro; Stefan A. Laufer; Lídia M. Lima

A methodology to obtain 7-nitroquinoxalin-2-amine using o-phenylenediamine as starting material in a five-step procedure in good yields and high purity.

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


Published online: February 6, 2017.

J. Braz. Chem. Soc. 2017

Magnetic Solid-Phase Extraction in Combination with Ultra High-Performance Liquid Chromatography-Tandem Mass Spectrometry Analysis: Quantification of Risperidone and 9-Hydroxyrisperidone in Biological Samples

Qinhong Yin; Yanqin Zhu; Yaling Yang

Magnetic solid phase extraction procedure used for the determination of targeted compounds in biological samples.


Published online: February 6, 2017.

J. Braz. Chem. Soc. 2017

Grape and Apple Pomaces from Southern Brazil: Valorization of By-Products through Investigation of Their Antioxidant Potential

Mariéli Karling; Thariane C. Bicas; Vanderlei Aparecido de Lima; Tatiane Luiza C. Oldoni

Optimizing the extraction of phenolic antioxidants from grape and apple pomaces from Brazil using response surface methodology.


Published online: February 3, 2017.

J. Braz. Chem. Soc. 2017

Synthesis by Click Reactions and Antiplasmodial Activity of Lupeol 1,2,3-Triazole Derivatives

Tatiane F. Borgati; Guilherme R. Pereira; Geraldo C. Brandão; Juliana O. Santos; Dayane Aparecida M. Fernandes; Renata C. de Paula; Maria Fernanda A. do Nascimento; Luciana F. Soares; Júlio César D. Lopes; José D. de Souza Filho; Alaíde B. de Oliveira

Five new lupeol 1,2,3-triazole derivatives were synthesized from lupeol which was isolated from Parahancornia fasciculata and were assayed for antiplasmodial and cytotoxic activity.


Published online: February 3, 2017.

J. Braz. Chem. Soc. 2017

Femtoliter Scale Detection of an Antithyroid Drug Using Gold Nanoparticles in a Microfluidic Chip

Atefeh Abbasi-Ahd; Nader Shokoufi; Sara Adeleh; Kazem Kargosha

Photo thermal lens effect of gold nanoparticles (GNPs) capped with methimazole.


Published online: February 3, 2017.

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