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vol. 29, No. 10, 2018, p. 1981-2212

 

Biodiesel can leave industry along with contaminants from production system. A sediment present in the bottom of biodiesel storage tanks of pure soybean was evaluated and fatty acids esters, metal ions and a microbial community were detected. The species found were already described as deteriogenics, however, according to the conditions established during 60 days growth evaluation, the microorganisms did not exhibit biodiesel degradation potential. Details are presented in the Article Nature of Insoluble Material Found in the Bottom of Soybean Biodiesel Storage Tank: Chemical and Microbiological Approach by Juciana C. Cazarolli, Gabriela Boelter, Amanda M. D. L. de Lima, Thaisa Hengles, Camila Correa, Maria do Carmo R. Peralba, Marco F. Ferrão, Eduardo H. S. Cavalcanti, Márcia V. Bisol, Kelly S. Bezerra, Nelson R. Antoniosi Filho and Fátima M. Bento on page 2034.


Cover Article
J. Braz. Chem. Soc. 2018, 29(10), 2034-2045

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

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

How to cite this article

Biodiesel can leave industry along with contaminants from production system. A sediment present in the bottom of biodiesel storage tanks of pure soybean was evaluated and fatty acids esters, metal ions and a microbial community were detected. The species found were already described as deteriogenics, however, according to the conditions established during 60 days growth evaluation, the microorganisms did not exhibit biodiesel degradation potential. Details are presented in the Article Nature of Insoluble Material Found in the Bottom of Soybean Biodiesel Storage Tank: Chemical and Microbiological Approach by Juciana C. Cazarolli, Gabriela Boelter, Amanda M. D. L. de Lima, Thaisa Hengles, Camila Correa, Maria do Carmo R. Peralba, Marco F. Ferrão, Eduardo H. S. Cavalcanti, Márcia V. Bisol, Kelly S. Bezerra, Nelson R. Antoniosi Filho and Fátima M. Bento on page 2034.

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

Published online: April 11, 2018

Editorial J. Braz. Chem. Soc. 2018, 29(10), 1981-1982

It is Necessary to React

Aldo José Gorgatti Zarbin

How to cite this article

 

http://dx.doi.org/10.21577/0103-5053.20180164


Review J. Braz. Chem. Soc. 2018, 29(10), 1983-1998

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

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

How to cite this article

 

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

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

Published online: July 24, 2018

J. Braz. Chem. Soc. 2018, 29(10), 1999-2025

Deep Eutectic Solvents as Unconventional Media for Multicomponent Reactions

Luiz S. Longo Jr.; Marcus V. Craveiro

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

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

Published online: August 2, 2018

Articles J. Braz. Chem. Soc. 2018, 29(10), 2026-2033

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

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

How to cite this article

 

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

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

Published online: April 11, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2034-2045

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

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

How to cite this article

 

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

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

Published online: April 11, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2046-2053

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

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

How to cite this article

 

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

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

Published online: April 13, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2054-2059

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

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

How to cite this article

 

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

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

Published online: April 16, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2060-2071

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

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

How to cite this article

 

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

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

Published online: April 16, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2072-2088

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

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

How to cite this article

 

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

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

Published online: April 16, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2089-2095

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

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

How to cite this article

 

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

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

Published online: April 17, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2096-2103

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

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

How to cite this article

 

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

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

Published online: April 18, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2104-2116

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

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

How to cite this article

 

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

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

Published online: April 18, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2117-2126

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

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

How to cite this article

 

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

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

Published online: April 24, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2127-2136

Metal Organic Frameworks for Selective Degradation of Amoxicillin in Biomedical Wastes

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

How to cite this article

 

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

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

Published online: April 26, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2137-2143

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

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

How to cite this article

 

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

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

Published online: April 27, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2144-2149

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

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

How to cite this article

 

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

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

Published online: May 7, 2018


J. Braz. Chem. Soc. 2018, 29(10), 2150-2157

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

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

How to cite this article

 

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

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

Published online: May 10, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2158-2168

Wax Behavior in Crude Oils by Pour Point Analyses

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

How to cite this article

 

Two-dimensional gas chromatography of a crude oil sample.

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

Published online: May 11, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2169-2179

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

Xiang Li; Xiao-Qing Deng; Chao Dong

How to cite this article

 

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

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

Published online: May 14, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2180-2188

Organophosphorus Pesticide in Sapodilla (Manilkara zapota) Fruit

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

How to cite this article

 

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

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

Published online: May 14, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2189-2196

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

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

How to cite this article

 

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

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

Published online: May 15, 2018

J. Braz. Chem. Soc. 2018, 29(10), 2197-2206

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

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

How to cite this article

 

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

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

Published online: May 18, 2018


Short Report J. Braz. Chem. Soc. 2018, 29(10), 2207-2212

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

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

How to cite this article

 

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

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

Published online: May 18, 2018

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