11:52, Mon Mar 19

Open Access/APCs

Forthcoming Papers - 2018

Articles published online ahead of print

Articles J. Braz. Chem. Soc. 2018

Electrode Material Containing Graphite Incorporated to an Amino-Functionalized Polydimethylsiloxane Network for the Detection of Copper

Ricardo P. D. Silva; Alzira M. S. Lucho; Fabio L. Pissetti

A polydimethylsiloxane amino functionalized polymer network with graphite incorporated was used as electrode material to detect copper ions in aqueous solutions and sugarcane spirit.


Published online: March 16, 2018.

J. Braz. Chem. Soc. 2018

Silver Complex of an N-Heterocyclic Carbene Ligand with Bulky Thiocarbamate Groups

Elvis Robles-Marín; Alexander Mondragón; Marcos Flores‑Alamo; Ivan Castillo

A thiocarbamate-containing imidazolium reacts with Ag2O affording the sterically hindered N-heterocyclic carbene (NHC)-silver complex.


Published online: March 15, 2018.

J. Braz. Chem. Soc. 2018

Fatty Acid Composition and Carotenoids in Raw and Grilled Tilapia GIFT Fillets Supplemented with Lycopene, β-Carotene and Lutein

Elaine C. Reis; Marília B. Galuch; Roberta da Silveira; Hevelyse M. C. dos Santos; Cesar Sary; Thiago F. S. Magon; Ingrid L. Figueiredo; Ricardo P. Ribeiro; Jesuí V. Visentainer; Oscar O. Santos

Lycopene, lutein and beta-carotene capsules were supplemented to tilapia (genetically improved farmed tilapia, GIFT). An increase in the concentration of all compounds supplemented, as well as the preservation in the lipid quality was observed in the fillets, even after thermal processing.


Published online: March 13, 2018.

J. Braz. Chem. Soc. 2018

Evaluating the Electrochemical Characteristics of Babassu Coconut Mesocarp Ethanol Produced to Be Used in Fuel Cells

Ziel S. Cardoso; Isaide A. Rodrigues; Cáritas J. S. Mendonça; José R. P. Rodrigues; Walace R. A. Ribeiro; Wanderson O. Silva; Adeilton P. Maciel

Stages of the process of evaluation of the electrochemical characteristics of babassu alcohol.


Published online: March 13, 2018.

J. Braz. Chem. Soc. 2018

Full Factorial Experimental Design for Carbamazepine Removal Using Electrochemical Process: a Case Study of Scheming the Pathway Degradation

Fouad F. Al-Qaim; Zainab H. Mussa; Ali Yuzir; Md P. Abdullah; Mohamed R. Othman

Full factorial experimental design was applied for the treatment of carbamazepine, which is one of the most used drugs for treatment of neuropathic pain. The results showed that applied voltage is the most significant factor in this treatment process. Moreover, pathway degradation was monitored as well using liquid chromatography-time of flight/mass spectrometry (LC-TOF/MS).


Published online: March 13, 2018.

J. Braz. Chem. Soc. 2018

Synthesis of Modified Silica Aerogel Nanoparticles for Remediation of Vietnamese Crude Oil Spilled on Water

Hong K. D. Nguyen; Phuong T. Hoang; Ngo T. Dinh

Surface modified silica aerogel nanoparticles.


Published online: March 13, 2018.

J. Braz. Chem. Soc. 2018

Griseofulvin, Diketopiperazines and Cytochalasins from Endophytic Fungi Colletotrichum crassipes and Xylaria sp., and Their Antifungal, Antioxidant and Anticholinesterase Activities

Vanessa M. Chapla; Maria L. Zeraik; Mariana C. Cafeu; Geraldo H. Silva; Alberto J. Cavalheiro; Vanderlan S. Bolzani; Maria C. M. Young; Ludwig H. Pfenning; Angela R. Araujo

A new compound 1-phenylethyl-O-α-L-rhamnopyranoside from C. crassipes, together with sixteen secondary metabolites were isolated from two endophytic fungi associated with Casearia sylvestris. The compound cyclo(D)-Pro-(D)-Phe exhibited potent antifungal and antioxidant activity and potent acetylcholinesterase (AChE) inhibition.


Published online: March 9, 2018.

J. Braz. Chem. Soc. 2018

Fast Spectrophotometric Determination of Iodine Value in Biodiesel and Vegetable Oils

Samara Soares; Fábio R. P. Rocha

Schematic representation of the procedure for determination of iodine value in biodiesel and vegetable oils.


Published online: March 9, 2018.

J. Braz. Chem. Soc. 2018

Study of the Corrosive Behavior of the AISI 1020 Steel in Acid Crude Oil by Microscopic Techniques (LM, AFM and SEM/EDX) and Raman Spectroscopy

Heloisa P. Dias; Eliane V. Barros; Cristina M. S. Sad; Enrique R. Yapuchura; Alexandre O. Gomes; Robson Moura; Fernanda E. Pinto; Débora V. Domingos; Glória M. F. V. Aquije; Valdemar Lacerda Jr.; Wanderson Romão

AISI 1020 steel was submitted to thermal degradation in acid crude oil. Microscopy images (light microscopy (LM), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDX), atomic force microscopy (AFM), and Raman) were combined to understand the influence of corrosion rate. A passivation film was formed, which consisted of two layers (an external, formed of FeS, and an internal, composed of iron oxides).


Published online: March 8, 2018.

J. Braz. Chem. Soc. 2018

De-NOx Performance and Mechanism of Mn-Based Low-Temperature SCR Catalysts Supported on Foamed Metal Nickel

Baozhong Zhu; Guobo Li; Yunlan Sun; Shoulai Yin; Qilong Fang; Zhaohui Zi; Zicheng Zhu; Jiaxin Li; Keke Mao

The Eley-Rideal mechanism and superior H2O resistance of Mn7.5/foamed metal nickel (FMN) catalyst in NH3-selective catalytic reduction (SCR) reaction.


Published online: March 8, 2018.

J. Braz. Chem. Soc. 2018

Thermal Properties of the Blends of Methyl and Ethyl Esters Prepared from Babassu and Soybean Oils

Cleber L. Nicolau; Aline N. V. Klein; Cinthia A. A. Silva; Antonio R. Fiorucci; Jusinei M. Stropa; Elisandra O. Santos; Kênia C. S. Borges; Rogério C. L. da Silva; Lincoln C. S. de Oliveira; Edésio L. Simionatto; Dilamara R. Scharf; Euclésio Simionatto

Ester blends from the transesterification of babassu oil and soybean oil were evaluated for their thermal properties. The babassu esters have been shown a positive influence on the crystallization point profile of the blends.


Published online: March 7, 2018.

J. Braz. Chem. Soc. 2018

Ketalization of Ketones to 1,3-Dioxolanes and Concurring Self-Aldolization Catalyzed by an Amorphous, Hydrophilic SiO2-SO3H Catalyst under Microwave Irradiation

Sandro L. Barbosa; Myrlene Ottone; Mainara T. de Almeida; Guilherme L. C. Lage; Melina A. R. Almeida; David Lee Nelson; Wallans T. P. dos Santos; Giuliano C. Clososki; Norberto P. Lopes; Stanlei I. Klein; Lucas D. Zanatta

A sulfuric acid modified silica catalyst has great affinity for ketones, producing high yields of self-condensation products; in the presence of polyalcohols, ketals are easily prepared.


Published online: March 7, 2018.

J. Braz. Chem. Soc. 2018

Applicability of a Voltammetric Assay Based on the Electroreduction of Oxygen to Evaluate the Antioxidant Capacity of Pequi (Caryocar brasiliense Camb.) Pulp

Flávia A. Pinheiro; Leonardo L. Okumura; Astréa F. S. Silva; Júnio G. Silva; Letícia R. Ferreira; Edilton S. Barcellos; Edimar A. F. Fontes

Application of a novel voltammetric assay to evaluation of the total antioxidant capacity of pequi pulp, as alternative to spectrophotometric assays.


Published online: March 6, 2018.

J. Braz. Chem. Soc. 2018

Analytical Method Development for Fatty Acid Direct Methylation in Fruits

Patrícia D. S. Santos; Roberta da Silveira; Natália V. Reis; Jesuí V. Visentainer; Oscar O. Santos

Through the surface response methodology, it was developed a direct methylation method of fatty acids in fruit samples.


Published online: March 5, 2018.

J. Braz. Chem. Soc. 2018

(+)-BINOL and Pure Shift Experiment: A Bidirectional Approach for NMR Chiral Discrimination of Overcrowded Spectra of Primary Amines

Juliana C. Merino; Artur F. Keppler; Márcio S. Silva

The 1H pure shift nuclear magnetic resonance (NMR) experiment and the readily available (+)-1,1'-bi-2-naphtol (BINOL) chiral auxiliary can be used for routine chiral discrimination analysis of complex NMR spectra.


Published online: March 1, 2018.

J. Braz. Chem. Soc. 2018

Removal of Beta-Lactams Antibiotics through Zero-Valent Copper Nanoparticles

Lucas M. F. Oliveira; Mayra A. Nascimento; Yuri M. Guimarães; André F. Oliveira; Antônio A. Silva; Renata P. Lopes

The removal process of antibiotics can occur through degradation by Cu+ species and also adsorption by Cu2+ hydroxides/oxides which can be formed on the surface of nanoparticles.


Published online: February 27, 2018.

J. Braz. Chem. Soc. 2018

Phragmalin Limonoids from Swietenia macrophylla and Their Antifeedant Assay against Mahogany Predator

Sônia G. S. R. Pamplona; Mara S. P. Arruda; Kelly C. F. Castro; Consuelo Y. Y. e Silva; Antonio G. Ferreira; Maria F. G. F. da Silva; Orlando S. Ohashi; Milton N. da Silva

Eight new phragmalin limonoids with an 8,9,30-ortho-ester unit, together with eight known were isolated from Swietenia macrophylla King. Four known limonoids show a significant reduction in the larval weight of Hypsipyla grandella.


Published online: February 26, 2018.

J. Braz. Chem. Soc. 2018

Investigation of Distribution of Antioxidant Compounds from Natural Sources and Study of Lipid Protection in Oil-in-Water Emulsions

Sylvio V. Palombini; Fabiana Carbonera; Marília B. Galuch; Thiago Claus; Thiago F. S. Magon; Jesuí V. Visentainer; Sandra T. M. Gomes; Makoto Matsushita

Direct addition of natural sources of antioxidants in oil-in-water emulsions, followed by the study of their antioxidant activity and the distribution of the antioxidant compounds between the emulsion phases.


Published online: February 26, 2018.

J. Braz. Chem. Soc. 2018

Improved Method for Microwave-Assisted Synthesis of Benzodiazepine-2,5-diones from Isatoic Anhydrides Mediated by Glacial Acetic Acid

Armando De La Cruz; Carlos Alejandro Vega-Acevedo; Ignacio A. Rivero; Daniel Chávez

Improved method for the synthesis of benzodiazepin-2,5-diones and 7-iodobenzodiazepin-2,5-diones mediated by glacial acetic acid.


Published online: February 26, 2018.

J. Braz. Chem. Soc. 2018

A Water Soluble Naphthalimide-Based Chemosensor for Fluorescent Detection CN in Pure Water and Its Application in Practical Samples

Li Wang; Wen-Ting Li; Wen-Juan Qu; Yan-Qing Fan; Hong Yao; Qi Lin; Tai‑Bao Wei; You-Ming Zhang

A water soluble fluorescent chemosensor (DA) was successfully synthesized. It could fluorescent detect CN- with high selectivity and sensitivity in pure water via an intramolecular charge transfer to twisted intramolecular charge transfer (ICT-TICT) state change mechanism.


Published online: February 23, 2018.

J. Braz. Chem. Soc. 2018

Multiple Spectroscopic and Theoretical Approaches to Study the Interaction between HSA and the Antiparasitic Drugs: Benznidazole, Metronidazole, Nifurtimox and Megazol

Otávio A. Chaves; Romulo C. Ferreira; Lorrayne S. da Silva; Bruna C. E. de Souza; Dari Cesarin-Sobrinho; José Carlos Netto-Ferreira; Carlos M. R. Sant'Anna; Aurélio B. B. Ferreira

Benznidazole (BZL), metronidazole (MTZ), nifurtimox (NFX) and megazol (MZ) can be carried in the human bloodstream by human serum albumin (HSA). NFX showed differences in the thermodynamic parameters; the presence of the 1,3,4-thiadiazole group in the MZ structure results in better interaction with HSA.


Published online: February 20, 2018.

J. Braz. Chem. Soc. 2018

Development of a Method Based on DLLME and UFLC-DAD for the Determination of Antibiotics in Honey Samples and the Study of Their Degradation Kinetics

Ana C. B. A. Santana; Marta V. A. Santana; Pedro A. P. Pereira

In this work, a method was developed, based on dispersive liquid-liquid microextraction (DLLME)-ultra-fast liquid chromatography coupled to diode array detector (UFLC-DAD), to simultaneously determine ten antibiotics in honey and for studying their degradation kinetics.


Published online: February 20, 2018.

J. Braz. Chem. Soc. 2018

ETS‑10 Modified with CuxO Nanoparticles and Their Application for the Conversion of CO2 and Water into Oxygenates

Eliane R. Januário; Ana F. Nogueira; Heloise O. Pastore

Solar fuels were obtained from CO2 and H2O photoreduction using ETS-10/CuxO as photocatalyst.


Published online: February 20, 2018.

J. Braz. Chem. Soc. 2018

Effects of the Structure and Composition of Montmorillonite on the Dimerization of Unsaturated Fatty Acids

Xue Huang; Yaoqi Yin; Buning Zhang; Guangzhu Feng

After one-step and two-step intercalations, the structure and properties of montmorillonite (MMT) affect the formation of dimer acids by the dimerization of unsaturated fatty acids.


Published online: February 16, 2018.

J. Braz. Chem. Soc. 2018

Using Bar Infrared Spectra and Coincidence Indexes to Study the Diversity of Solid Cyanuric Acid Structures

Marcela C. B. G. Nilo; Thais G. Simões; Claudio Costa Neto

Bar spectra and coincidence indexes establish new horizons for the infrared spectroscopy of solids. Polymorphs are precisely detected and quantified. This method may become an important tool for studying polymorphs in active pharmaceutical ingredients (APIs).


Published online: February 14, 2018.

J. Braz. Chem. Soc. 2018

Selective Adsorption of AuIII from Aqueous Solution Using 2,5‑Dimercapto‑1,3,4‑thiadiazole Modified Persimmon Tannin

Sijing Zhang; Yongliang Ji; Fengjiao Ao; Yongping Wang; Junxue Zhao; Shuangli Chen

DMTD-PT, a persimmon tannin (PT)-based and 2,5-dimercapto-1,3,4-thiadiazole (DMTD) grafted biosorbent, showed the better selectivity for AuIII over coexisting base metal ions in aqueous solution.


Published online: February 14, 2018.

J. Braz. Chem. Soc. 2018

Evaluation of the Sustainability of Integrated Hydrothermal Synthesis of Zeolites Obtained from Waste

Suzana F. Ferrarini; Ariela M. Cardoso; Luisa Alban; Marçal J. R. Pires

Comparison between the two processes via: (i) assessment of the process of Si, Al and contaminants in the extracts, zeolitic, products and effluents, (ii) cation exchange capacity and purity, and (iii) reaction yields and percentage of Si and Al incorporated into zeolites, among others.


Published online: February 6, 2018.

J. Braz. Chem. Soc. 2018

Study on the Mixed-Mode HPLC Separation of Shuang-Huang-Lian and Xue‑Bi‑Jing Injections Based on an Ionic Liquid Column

Aihong Yang; Shun Zhang; Lei Zhang; Jingjing Zhong; Xiaodi Kou

Traditional Chinese medicine injections were analyzed based on an ionic liquid column. U-Shape plots of retention factors vs. mobile phase constitutions were obtained and mixed-mode chromatography was applied for this kind of complex system.


Published online: January 25, 2018.

J. Braz. Chem. Soc. 2018

Design of Novel N-Miristoiltransferase Inhibitors of Leishmania donovani Using Four-Dimensional Quantitative Structure-Activity Relationship Analysis

Letícia Santos-Garcia; Daniela R. Silva; Letícia C. Assis; Tamiris M. de Assis; Giovanna C. Gajo; Ítalo Antônio Fernandes; Teodorico C. Ramalho; Elaine F. F. da Cunha

Proposed N-myristoyltransferase (NMT) inhibitors of Leishmania donovani anchored in the active site of the enzyme.


Published online: January 15, 2018.

J. Braz. Chem. Soc. 2018

Polydimethylsiloxane as a Matrix for the Stabilization and Immobilization of Zero‑Valent Iron Nanoparticles. Applications to Dehalogenation of Environmentally Deleterious Molecules

Donaldo Fabio Mercado; Richard G. Weiss

Introduction of zero-valent iron nanoparticles into amino-polydimethylsiloxane based materials allows easy recovery of the particles while maintaining their reactivity toward the dehalogenation of environmental pollutants.


Published online: January 15, 2018.

Short Report J. Braz. Chem. Soc. 2018

Applying Different Sample Treatment Strategies for Evaluating Phosphorus Distribution in Orange Juice

Maria F. C. da Silva Neta; Ana C. F. de Lyra; Sarah A. R. Soares; Josué C. C. Santos; Daniela S. Anunciação

Estimation of phosphorus distribution in orange juice by different sample treatment strategies including fractioning in function of its particle size and charge.


Published online: January 11, 2018.

Articles J. Braz. Chem. Soc. 2018

Adsorptive Stripping Voltammetric Determination of Oxolinic Acid in Water Sample

Herbert Aleixo; Leonardo L. Okumura; Astréa F. S. Silva; Alexandre Gurgel; Juliana A. Diniz

A new method for analysis of the antimicrobial oxolinic acid (OXA) in untreated water was developed using carbon paste electrode.


Published online: January 11, 2018.

J. Braz. Chem. Soc. 2018

Transition from Thermokinetic to Chemical Instabilities in a Modified Sal'nikov Model

Daniel Barragán; Pablo A. Ochoa-Botache

Transition between chemical and thermokinetic oscillations mediated by a stoichiometric bifurcation parameter in a hypothetical biological context: muscle fatigue and possible ATP thermosynthesis.


Published online: January 10, 2018.

J. Braz. Chem. Soc. 2018

A Multicommuted Flow System for Spectrophotometric Determination of Formaldehyde in Mushroom

Gabriel F. Pinto; Diogo L. Rocha; Eduardo M. Richter; Rodrigo A. A. Muñoz; Sidnei G. da Silva

A multicommuted flow system for spectrophotometric determination of formaldehyde in mushroom based on the Hantzsch reaction (λmax = 412 nm) is reported with a detection limit of 0.02 mg L-1, sample throughput of 17 h-1 and reduced chemical waste.


Published online: January 5, 2018.

Short Report J. Braz. Chem. Soc. 2018

Mercury Biodistribution in Rats after Chronic Exposure to Mercury Chloride

Mariana Z. G. Fornazier; Tatiani B. Nascimento; Vinicius B. Marques; Tatiana D. Saint'Pierre; Dalton Vassalo; Geisamanda P. Brandão; Leonardo dos Santos; Maria T. W. D. Carneiro

In this work we evaluated the mercury biodistribution after different doses of HgCl2. Mercury was deposited preferentially in some tissues while the blood levels remained practically constant. Therefore, it is suggested that blood mercury monitoring is relevant only when the tissues turn saturated.


Published online: January 4, 2018.

Articles J. Braz. Chem. Soc. 2017

Synthesis, DNA Interaction and Genotoxic Evaluation of a Photoactive Benzothiadiazole with Potential Application in Photovoltaic Paint

Adriani P. Damiani; Paula Rohr; José L. Westrup; Rodrigo C. Duarte; Luiza M. Longaretti; Bruna M. da Rocha; Giulia Strapazzon; Lara C. Venturini; Emanuel Souza; Claus T. Pich; Tiago E. A. Frizon; Vanessa M. de Andrade; Fabiano S. Rodembusch; Alexandre G. Dal-Bó

The 2,1,3-benzothiadiazole compound can be used safely in manufacturing as a dye for paints and photovoltaic devices.


Published online: December 21, 2017.

J. Braz. Chem. Soc. 2017

Rapid and Efficient Uncatalyzed Knoevenagel Condensations from Binary Mixture of Ethanol and Water

João M. G. O. Ferreira; João B. M. de Resende Filho; Poliane K. Batista; Ercules E. S. Teotonio; Juliana A. Vale

The uncatalyzed Knoevenagel condensation between aldehydes and different compounds with active methylene was performed under new conditions using a mixture of ethanol/water (3:7, v/v), showing a good isolated yields in a short reaction time.


Published online: December 21, 2017.

J. Braz. Chem. Soc. 2017

Carbon Nanotube-Supported Copper-Cobalt Catalyst for the Production of Higher Carbon Number Alcohols through Carbon Monoxide Hydrogenation

Peng Wang; Xihua Du; Wenchang Zhuang; Keying Cai; Jing Li; Yan Xu; Yingmei Zhou; Kai Sun; Shuyao Chen; Xiaoli Li; Yisheng Tan

Copper promotes the reduction of CoO and forms Cu0–Co0 active sites; in addition to this center, Co0–Co2+ is also the center for high alcohols synthesis and Co2+ site favor alcohols yields. Excellent C2+ alcohols selectivity is got over the catalyst with weight ratio of Cu/Co = 1.


Published online: December 20, 2017.

J. Braz. Chem. Soc. 2017

Prediction of Sulfur Content in Diesel/Biodiesel Blends Using LED-Induced Fluorescence Associated with Multivariate Calibration

Alessandra T. Campos; Cristina M. Quintella; Marilena Meira; Saionara Luna

Light emitting diode (LED)-induced fluorescence equipment was used in the biodiesel/diesel/sulfur sample readings and after the analysis the data treatment was done using partial least squares (PLS).


Published online: December 19, 2017.

J. Braz. Chem. Soc. 2017

Colorimetric Analysis of Cotton Textile Bleaching through H2O2 Activated by UV Light

Bruno P. de Oliveira; Lilian T. Moriyama; Vanderlei S. Bagnato

Scheme of the proposed UV mediated cotton bleaching process with H2O2, evaluated by colorimetry and tensile test.


Published online: December 19, 2017.

J. Braz. Chem. Soc. 2017

Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid‑Liquid Microextraction Combined with Liquid Chromatography‑Tandem Mass Spectrometry

Liziane C. Marube; Sergiane S. Caldas; Elisane O. dos Santos; Andressa Michaelsen; Ednei G. Primel

Ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) was successfully used for the extraction of the pesticides and pharmaceuticals and personal care products (PPCPs) in water.


Published online: December 19, 2017.

J. Braz. Chem. Soc. 2017

Chain Elongation Influence in Copolymerization with Different Diesters of Norbornene 2,3-Dicarboxylic Acid Monomers via ROMP under Air Atmosphere

Sâmia D. Braga; Vanessa B. Vieira; Cristina V. Silva-Neta; Nouga C. Batista; Larissa R. Fonseca; Benedito S. Lima-Neto; Geraldo E. Luz Jr.; José Luiz S. Sá

Copolymerization via ring-opening metathesis polymerization (ROMP) under air atmosphere of norbornene (NBE) and its ester-dicarboxylic derivate with Ru-catalyst.


Published online: December 19, 2017.

J. Braz. Chem. Soc. 2017

Determination of Alkyl Esters Content by Gas Chromatography: Validation of Method Based on Short Column and Response Factor

Filipe L. Silva; Lucas N. Melo; Carlos R. Wolf; Simoni M. P. Meneghetti; Janaína H. Bortoluzzi

Quantification of fatty acid methyl or ethyl esters obtained from soybean oil and comparison of analytical methodologies applied to biodiesel samples.


Published online: December 14, 2017.

J. Braz. Chem. Soc. 2017

Identification of Ethyl and t-Butyl Glyceryl Ethers Using Gas Chromatography Coupled with Mass Spectrometry

Paula M. Veiga; Cláudia O. Veloso; Ayres G. Dias; Cristiane A. Henriques

Gas chromatography-mass spectrometry (GC-MS) identification of ethyl and t-butyl glyceryl ethers.


Published online: December 14, 2017.

J. Braz. Chem. Soc. 2017

Leaves from the Tree Poincianella pluviosa as a Renewable Source of Antiplasmodial Compounds against Chloroquine-Resistant Plasmodium falciparum

Jacqueline E. de Souza; Maria F. A. do Nascimento; Maria P. G. Borsodi; Ana P. de Almeida; Bartira Rossi-Bergmann; Alaíde B. de Oliveira; Sônia S. Costa

Ten phenolic compounds were isolated from leaves of Poincianella pluviosa (Fabaceae). Among the major compounds, ellagic acid was the most active against Plasmodium falciparum (W2).


Published online: December 12, 2017.

J. Braz. Chem. Soc. 2017

Synthesis and Antimicrobial Activity of Glycosylated 2-Aryl‑5‑amidinobenzimidazoles

Thiago B. de Souza; Josidel C. Oliver; Ana Paula B. Gomes; Cícero Flávio S. Aragão; Leandro S. Ferreira; Fernando Henrique A. Nogueira; Amanda Latércia T. Dias; Ricardo J. Alves

Glycosylated 2-aryl-5-amidinobenzimidazoles were synthesized, characterized and showed antifungal and antibacterial potential against different strains.


Published online: December 12, 2017.

J. Braz. Chem. Soc. 2017

Air Quality Indexes in the City of Rio de Janeiro During the 2016 Olympic and Paralympic Games

Felipe Tsuruta; Nicole J. de Carvalho; Cleyton M. da Silva; Graciela Arbilla

The air quality indexes (AQIs) determined in Rio de Janeiro from July to September 2016, before and during the Summer Olympic and Paralympic Games, in four monitoring stations, were compiled and analyzed.


Published online: December 11, 2017.

J. Braz. Chem. Soc. 2017

Kavalactones and Benzoic Acid Derivatives from Leaves of Piper fuligineum Kunth (Piperaceae)

Bruna F. Mazzeu; Lidiane G. Felippe; Fernando Cotinguiba; Massuo J. Kato; Maysa Furlan

Kavalactones and benzoic acid derivatives from Piper fuligineum shows dichotomous biosynthetic pathways and shikimic acid is a common precursor of this two different classes.


Published online: December 6, 2017.

J. Braz. Chem. Soc. 2017

A Practical Fluorescence-Based Screening Protocol for Polyethylene Terephthalate Degrading Microorganisms

Michel R. B. Chaves; Maria L. S. O. Lima; Lusiane Malafatti‑Picca; Derlene A. de Angelis; Aline M. de Castro; Érika Valoni; Anita J. Marsaioli

We proposed a fast, low-cost, microscale fluorescence-based screening methodology for PET degrading microorganisms with selective detection of the terephthalic acid monomer produced during the microbial hydrolysis.


Published online: December 6, 2017.

J. Braz. Chem. Soc. 2017

In vitro Evaluation of Oxidative Stress Caused by Fine Particles (PM2.5) Exhausted from Heavy-Duty Vehicles Using Diesel/Biodiesel Blends under Real World Conditions

Robson M. de Jesus; Aline C. Mosca; Aline L. N. Guarieiro; Gisele O. da Rocha; Jailson B. de Andrade

Oxidative potential of PM2.5 as predictive indicator of adverse health effects.


Published online: December 6, 2017.

J. Braz. Chem. Soc. 2017

Structure/Activity of PtII/N,N-Disubstituted-N'-acylthiourea Complexes: Anti‑Tumor and Anti-Mycobacterium tuberculosis Activities

Ana M. Plutín; Anislay Alvarez; Raúl Mocelo; Raúl Ramos; Osmar C. Sánchez; Eduardo E. Castellano; Monize M. da Silva; Wilmer Villarreal; Legna Colina-Vegas; Fernando R. Pavan; Alzir A. Batista

Twelve [Pt(PPh3)2(acylthiourea)]PF6 complexes was synthesized and evaluated against Mycobacterium tuberculosis and human tumor cells.


Published online: December 6, 2017.

J. Braz. Chem. Soc. 2017

Influence of Environmental Factors and Cultural Methods on the Content of N,N-Dimethyltryptamine in Psychotria viridis (Rubiaceae)

André D. Cavalcante; Gabriele A. Cardoso; Fernando L. P. de Oliveira; Eduardo Bearzoti; Adriana A. Okuma; Lucienir P. Duarte; Sidney A. Vieira-Filho

Environmental parameters, nutrients, plant characteristics, data on farming methods were correlated with N,N-dimethyltryptamine, determined by gas chromatography coupled to mass spectrometry (GC-MS).


Published online: December 6, 2017.

J. Braz. Chem. Soc. 2017

Enhanced Detection of Ponceau 4R Food Dye by Glassy Carbon Electrode Modified with Reduced Graphene Oxide

Paloma B. de Moraes; Felipe F. Hudari; João P. Silva; Maria V. B. Zanoni

A voltammetric method is proposed by a simple electrodeposition of reduced graphene oxide on glassy carbon electrode. The modified electrode showed a 20-fold increase in analyte signal compared to unmodified electrode.


Published online: December 5, 2017.

J. Braz. Chem. Soc. 2017

Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS

César R. T. Tarley; Guilherme L. Scheel; Emerson S. Ribeiro; Caroline D. Zappielo; Fabio A. C. Suquila

Chelating agent free-solid phase extractor (CAF-SPE) based on new SiO2/Al2O3/SnO2 for online Pb2+ preconcentration.


Published online: December 5, 2017.

J. Braz. Chem. Soc. 2017

Continuous Synthesis of a Green Fuel Additive Mixture with Highest Quantities of Solketalacetin and Solketal and Lowest Amount of Diacetin from Biodiesel-Derived Glycerol

Yadollah M. Gorji; Hassan S. Ghaziaskar

Glycerol was reacted first with acetic acid to synthesize monoacetin. Then monoacetin and residual glycerol were reacted with acetone to obtain 62% solketalacetin, 30% solketal, and 8% diacetin.


Published online: December 5, 2017.

J. Braz. Chem. Soc. 2017

Syntheses, Experimental and Theoretical Studies on Absorption/Emission Properties of Pyrazoline-Containing Aryl/Methoxynaphthyl Substituents

Jorge Trilleras; Edwin González-López; Jhair León-Jaramillo; Alfredo Pérez‑Gamboa; Esneyder Puello-Polo; Pablo Romo; Alejandro Ortíz; Jairo Quiroga

Facile synthesis of pyrazoline derivatives and their luminescence properties. Theoretical calculations at time-dependent density functional theory (TD-DFT) level explain the electronic behavior.


Published online: December 4, 2017.

J. Braz. Chem. Soc. 2017

Photophysical and Photochemical Properties and Aggregation Behavior of Phthalocyanine and Naphthalocyanine Derivatives

Thalita F. M. de Souza; Felipe C. T. Antonio; Mateus Zanotto; Paula Homem-de-Mello; Anderson O. Ribeiro

Computational calculations (density-functional theory, DFT) of Q-band involved molecular orbitals in phthalocyanines and naphthalocyanines with similar structures.


Published online: November 28, 2017.

J. Braz. Chem. Soc. 2017

Use of Mixture Design with Minimal Restrictions to Optimize an Extraction Procedure Employing Diluted Acids Assisted by Ultrasound and Microwave for Nutrient Element Determination in Vegetal Samples

Vinícius C. Costa; Erik G. P. Silva; Daniel C. Lima; Marcelo Franco; Raildo M. Jesus; Marcos A. Bezerra; Fábio A. C. Amorim

Optimization of sample preparation based on extraction with diluted acids assisted by ultrasound and microwave for nutrients elements determination.


Published online: November 27, 2017.

J. Braz. Chem. Soc. 2017

Impact of Cafeteria Diet on the Composition of Fatty Acids in Zebrafish (Danio rerio) Fillets

Vanessa B. M. J. C. Néia; Eliane P. Ambrosio-Albuquerque; Ingrid L. Figueiredo; Joana S. Boeing; Thibério C. da Silva; Vanessa Lewandowski; Ricardo P. Ribeiro; Jeane E. L. Visentainer; Jesuí V. Visentainer

The effect of a cafeteria diet (chocolate, peanut and biscuit) on the composition of fatty acids in zebrafish fillets was evaluated by gas chromatography.


Published online: November 27, 2017.

J. Braz. Chem. Soc. 2017

Rhodium(III)-Catalyzed Addition of Indoles with Boc-Imines via C−H Bond Activation

Jinfang Wang; Hui Wang; Chuanjun Yue

A rhodium-catalyzed alkylation reaction of indoles with N-Boc-imines has been developed via C−H activation to afford a series of biological important 2-indolylmethanamine derivatives with good functional group tolerance and high yields.


Published online: November 27, 2017.

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