JBCS

12:28, Wed Mar 20

Open Access/APCs

Current Issue vol. 30, No. 4, 2019, p. 681-891

 

The bio-based and biodegradable "natural deep eutectic solvents" (NADES) are promising as alternative reaction media to conventional organic solvents for polymerization and polymer reactions. Details are presented in the Review Use of Natural Deep Eutectic Solvents for Polymerization and Polymer Reactions by Analía V. Gómez, Atanu Biswas, Carmen C. Tadini, Roselayne F. Furtado, Carlucio R. Alves and Huai N. Cheng on page 717.


Cover Article
J. Braz. Chem. Soc. 2019, 30(4), 717-726

Use of Natural Deep Eutectic Solvents for Polymerization and Polymer Reactions

Analía V. Gómez; Atanu Biswas ; Carmen C. Tadini; Roselayne F. Furtado; Carlucio R. Alves; Huai N. Cheng

How to cite this article

The bio-based and biodegradable "natural deep eutectic solvents" (NADES) are promising as alternative reaction media to conventional organic solvents for polymerization and polymer reactions. Details are presented in the Review Use of Natural Deep Eutectic Solvents for Polymerization and Polymer Reactions by Analía V. Gómez, Atanu Biswas, Carmen C. Tadini, Roselayne F. Furtado, Carlucio R. Alves and Huai N. Cheng on page 717.

http://dx.doi.org/10.21577/0103-5053.20190001

Published online: January 8, 2019

Editorial J. Braz. Chem. Soc. 2019, 30(4), 681-682

How Many More Brumadinhos and Marianas Will We be Faced with Yet?

Norberto Peporine Lopes; Rossimiriam Pereira de Freitas; Romeu Cardozo Rocha Filho

How to cite this article

 

http://dx.doi.org/10.21577/0103-5053.20190034


Review J. Braz. Chem. Soc. 2019, 30(4), 683-716

RM1 Semiempirical Model: Chemistry, Pharmaceutical Research, Molecular Biology and Materials Science

Nathalia B. D. Lima ; Gerd B. Rocha; Ricardo O. Freire; Alfredo M. Simas

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This review on the RM1 model presents improvements to the methodology as well as a wide range of its applications to theoretical, organic, physical, analytical, and inorganic chemistry, along with their interfaces with medicine, biology, and materials science.

http://dx.doi.org/10.21577/0103-5053.20180239

Published online: December 10, 2018

J. Braz. Chem. Soc. 2019, 30(4), 717-726

Use of Natural Deep Eutectic Solvents for Polymerization and Polymer Reactions

Analía V. Gómez; Atanu Biswas ; Carmen C. Tadini; Roselayne F. Furtado; Carlucio R. Alves; Huai N. Cheng

How to cite this article

 

Natural deep eutectic solvents (NADES) comprise a new family of agro-based, eco-friendly reaction media that can replace traditional organic solvents in polymerization and polymer reactions. A review of the current progress in this exciting new field is given in this article.

http://dx.doi.org/10.21577/0103-5053.20190001

Published online: January 8, 2019


Articles J. Braz. Chem. Soc. 2019, 30(4), 727-735

New Synthesis Method for a Core-Shell Composite Based on α-Bi2O3@PPy and its Electrochemical Behavior as Supercapacitor Electrode

Fárlon F. S. Xavier; Carlos G. O. Bruziquesi; Wélique S. Fagundes; Elaine Y. Matsubara; José M. Rosolen; Adilson C. Silva; Sheila C. Canobre; Fábio A. Amaral

How to cite this article

 

New α-Bi2O3@PPy core-shell hybrid composite based on polypyrrole (PPy) electropolymerized with ordered α-Bi2O3, which intensified the electrochemical properties, making it promising for supercapacitor application.

http://dx.doi.org/10.21577/0103-5053.20180192

Published online: September 27, 2018

J. Braz. Chem. Soc. 2019, 30(4), 736-743

Human Hair as Adsorbent of Palladium(II) in Solution: A Precursor of Well-Dispersed Size-Controlled Pd Nanoparticles

Fernanda G. Mendonça; Thaís G. Silva; Gustavo M. do Nascimento; Humberto O. Stumpf; Raquel V. Mambrini; Walace D. do Pim

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Human hair was used as an efficient adsorbent for palladium(II) in solution and, after a mild thermal treatment, well-dispersed Pd nanoparticles were obtained.

http://dx.doi.org/10.21577/0103-5053.20180194

Published online: October 1, 2018


J. Braz. Chem. Soc. 2019, 30(4), 744-751

Cr3+ Doped Al2O3 Obtained by Non-Hydrolytic Sol-Gel Methodology

José M. A. Caiut; Nolwen Floch; Younès Messaddeq; Omar J. de Lima; Lucas A. Rocha; Katia J. Ciuffi ; Eduardo J. Nassar ; Geraldo R. Friedermann; Sidney J. L. Ribeiro

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The non-hydrolytic sol-gel route is a single methodology to obtain different host for applications as light emission. The ruby and other semi-precious stones can be obtained by sol-gel methodology. The luminescence spectra indicated the octahedral symmetry of the chromium(III) ion replacing aluminum(III) ion in the alumina matrix.

http://dx.doi.org/10.21577/0103-5053.20180195

Published online: October 2, 2018

J. Braz. Chem. Soc. 2019, 30(4), 752-763

Insights on Structuration of Peroxotungstic Acid in Aqueous Media

Julia C. O. Pazinato; Marcos A. Villetti; Omar Mertins; Emerson R. Silva ; Irene T. S. Garcia

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The intensity of pyrene fluorescence bands increases with increasing sodium dodecyl sulfate (SDS) concentration, overriding the suppressive effect of peroxotungstic acid (PTA). The image at left shows small angle X-ray scattering curve for PTA/NaCl/SDS/ethanol/water and the resulting fractal structured films.

http://dx.doi.org/10.21577/0103-5053.20180196

Published online: October 2, 2018

J. Braz. Chem. Soc. 2019, 30(4), 764-771

Dispersive Solid Phase Extraction Headspace Sampling in Gas Chromatography-Mass Spectrometric Analysis of Volatiles: Application to Separation of Polycyclic Aromatic Hydrocarbons

Zahra Ramezani ; Fatemeh Kardani; Nadereh Rahbar; Ahmad Babapoor; Fariba Bahrami

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Dispersive solid phase extraction combined with headspace sampling was introduced and applied to separation and pre-concentration of polycyclic aromatic hydrocarbons (PAHs).

http://dx.doi.org/10.21577/0103-5053.20180198

Published online: October 8, 2018

J. Braz. Chem. Soc. 2019, 30(4), 772-779

Deracemization of sec-Alcohols through Sequential Application of C. albicans and Ketoreductases

Fábio D. Nasário; Paulo J. S. Moran ; José Augusto R. Rodrigues

How to cite this article

 

A biocatalytic cascade process was developed using the yeast Candida albicans CCT 0776 and a commercially available ketoreductase to promote deracemization of (±)-1-arylethanols, in high substrate concentration (above 100 mmol L-1), to prepare the (R)-alcohols (90-99%), with a high enantiomeric excess (83-99%) after 2-19 h.

http://dx.doi.org/10.21577/0103-5053.20180205

Published online: October 11, 2018


J. Braz. Chem. Soc. 2019, 30(4), 780-785

Use of FTIR-ATR Spectroscopy Combined with Multivariate Analysis as a Screening Tool to Identify Adulterants in Raw Milk

Daniele G. Conceição; Ben-Hur R. F. Gonçalves; Fernanda F. da Hora; Amanda S. Faleiro; Leandro S. Santos; Sibelli P. B. Ferrão

How to cite this article

 

Study of the use of Fourier transform infrared spectroscopy combined with multivariate analysis to identify adulterations in raw milk and in samples from producers.

http://dx.doi.org/10.21577/0103-5053.20180208

Published online: October 15, 2018

J. Braz. Chem. Soc. 2019, 30(4), 786-792

Black Carbon Associated to PM1.0 and PM2.5: Mass Variation due to Combustion of Biodiesel/Diesel Blends (B5, B6, B7 and B8)

Carlos R. da Silva Junior; Bruno R. L. Lemos; Jurandir P. Pinto; Ismael R. Amador; Maria Cristina Solci

How to cite this article

 

Before and after fine particulate matter on filter samples inside a bus station.

http://dx.doi.org/10.21577/0103-5053.20180209

Published online: October 17, 2018

J. Braz. Chem. Soc. 2019, 30(4), 793-803

Zika Virus Activity of the Leaf and Branch Extracts of Tontelea micrantha and Its Hexane Extracts Phytochemical Study

Fernanda L. Ferreira; Marcela S. Hauck; Lucienir P. Duarte ; José C. de Magalhães; Louise S. M. da Silva; Lúcia P. S. Pimenta; Julio C. D. Lopes; Maria O. Mercadante‑Simões; Sidney A. Vieira Filho

How to cite this article

 

The new friedelan-1,3,21-trione, nine known friedelanes, gutta-percha, squalene and a mixture of long-chain fatty acids were reported for the first time from Tontelea micrantha and also its genus. Its extracts inhibited Zika virus (ZIKV) multiplication at different stages, presenting a high virucidal effect.

http://dx.doi.org/10.21577/0103-5053.20180210

Published online: October 18, 2018


J. Braz. Chem. Soc. 2019, 30(4), 804-812

Combination of Multi-Energy Calibration (MEC) and Laser-Induced Breakdown Spectroscopy (LIBS) for Dietary Supplements Analysis and Determination of Ca, Mg and K

Amanda S. Augusto; Jeyne P. Castro; Marco A. Sperança; Edenir R. Pereira‑Filho

How to cite this article

 

Ablation process by laser-induced breakdown spectroscopy (LIBS) on dietary supplement surface and multi-energy calibration method (MEC).

http://dx.doi.org/10.21577/0103-5053.20180211

Published online: October 22, 2018


J. Braz. Chem. Soc. 2019, 30(4), 813-818

Photochemical Synthesis of Gold Nanoparticles by Irradiation of Gold Chloride with the 2nd Harmonic of a Nd:YAG Laser

Henrique F. P. Barbosa; Miguel G. Neumann; Carla C. S. Cavalheiro

How to cite this article

 

Irradiation of a HAuCl4 solution with the 532-nm emission of a pulsated Nd-YAG laser results in the production of pristine gold nanoparticles.

http://dx.doi.org/10.21577/0103-5053.20180213

Published online: October 26, 2018

J. Braz. Chem. Soc. 2019, 30(4), 819-829

Optimization of Atmospheric Pressure Photoionization for the Crude Oil Analysis Using Ultra-High Resolution Mass Spectrometry

Jandyson M. Santos ; Marcos A. Pudenzi; Alberto Wisniewski Jr.; Márcia C. Breitkreitz; Marcos N. Eberlin

How to cite this article

 

Design of experiments was successfully applied to optimize atmospheric pressure photoionization (APPI)(±) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) parameters for crude oil and its saturate, aromatic, resin and asphaltene (SARA) fractions analyses.

http://dx.doi.org/10.21577/0103-5053.20180214

Published online: October 31, 2018


J. Braz. Chem. Soc. 2019, 30(4), 830-836

Integrative Analysis Based on HPLC-DAD-MS/MS and NMR of Bertholletia excelsa Bark Biomass Residues: Determination of Ellagic Acid Derivatives

Felipe M. A. da Silva ; Anna Carolina S. Hanna; Abraão A. de Souza; Francinaldo A. da Silva Filho; Olinda M. F. Canhoto; Alvicler Magalhães; Paulo J. C. Benevides; Mariangela B. M. de Azevedo; Antonio C. Siani; Adrian M. Pohlit; Afonso D. L. de Souza; Hector H. F. Koolen

How to cite this article

 

The combination of nuclear magnetic resonance (NMR) and mass spectrometry (MS) to directly analyze crude extracts of Bertholletia excelsa bark residues indicated this biomass as a source of health-promoting compounds. Therefore, a potential raw material for food, pharmaceutical and chemical industries is described herein.

http://dx.doi.org/10.21577/0103-5053.20180215

Published online: November 1, 2018


J. Braz. Chem. Soc. 2019, 30(4), 837-844

Development and Validation of UHPLC-MS/MS for Simultaneous Determination of Scutellarin and Salicylic Acid in Rat Plasma: Application to Herb-Drug Pharmacokinetic Interaction Study

Guoliang Dai ; Jiandong Chen; Weidong Zhang; Yongtao Bai; Wen Jing; Ronghua Pan; Wenzheng Ju

How to cite this article

 

This work showed that apparent herb-drug pharmacokinetic interaction existed between aspirin and dengzhanxixin injection, and the combination of aspirin and dengzhanxixin injection noticeably altered the absorption, distribution and disposition of salicylic acid.

http://dx.doi.org/10.21577/0103-5053.20180216

Published online: November 6, 2018

J. Braz. Chem. Soc. 2019, 30(4), 845-850

New Composites CP@AC Based on Lanthanide Succinates

Guilherme C. Santos; Carlos A. F. de Oliveira; Fausthon F. da Silva ; Severino Alves Jr.

How to cite this article

 

This work explores the synthesis and characterization of seven new composites based on lanthanide-succinates coordination polymers and activated carbon.

http://dx.doi.org/10.21577/0103-5053.20180218

Published online: November 6, 2018


J. Braz. Chem. Soc. 2019, 30(4), 851-858

Comparative Study on Catalytic Dehydration of Glycerol with Alcohols

Guangxin Jia ; Wenlin Ma; Beibei He; Yifan Sun; Laishuan Liu

How to cite this article

 

A comparative study of the dehydration of glycerol with alcohols over ion exchange resin Amberlyst-35 was performed. The effect of catalyst amounts, reaction temperature, time, and the molar ratio of alcohols to glycerol were also studied.

http://dx.doi.org/10.21577/0103-5053.20180219

Published online: November 7, 2018

J. Braz. Chem. Soc. 2019, 30(4), 859-866

A Novel Colorimetric Immunoassay of Ultrasensitive Alpha-Fetoprotein Sensing in Magnetic Bead-Based Mimic Enzyme-Chromogenic Substrate System

Dan Su; Qiang Zeng; Bingwei Feng; Pengfei Xu; Baixi Shan; Yonggui Song

How to cite this article

 

Top figure shows the H2O2-stimulated colorimetric assay for monitoring of glucose oxidase (GOx) activity and the bottom figure displays the mimic enzyme-chromogenic substrate-based colorimetric immunoassay (MECI) by coupling with the hemin/4-aminoatipyrine/phenol system.

http://dx.doi.org/10.21577/0103-5053.20180220

Published online: November 8, 2018


J. Braz. Chem. Soc. 2019, 30(4), 867-872

Investigation on Ruthenium(II) Bipyridine/AgIII Complexes Chemiluminescence System and Its Application for Sensitive Norfloxacin and Ofloxacin Detection

Jinjin Liu; Ling Ma; Tangjuan Zhao; Kaijie Yang; Hongmei Shi; Weijun Kang; Li Ma

How to cite this article

 

A novel and sensitive flow-injection chemiluminescence (FI-CL) method was developed for the detection of norfloxacin (NFLX) and ofloxacin (OFLX) in commercial drug, milk and human urine samples based on AgIII-ruthenium(II) bipyridine in acidic solution.

http://dx.doi.org/10.21577/0103-5053.20180223

Published online: November 9, 2018

J. Braz. Chem. Soc. 2019, 30(4), 873-881

Application of a Novel Ion-Imprinted Polymer to the Separation of Traces of CdII Ions in Natural Water: Optimization by Box-Behnken Design

Caio S. A. Felix; Jeferson A. Barreto; Cleber G. Novaes ; Fábio A. C. Amorim; Valfredo A. Lemos; Heloysa M. C. Andrade; Erik G. P. da Silva

How to cite this article

 

A novel method for selective extraction of cadmium ions in water samples was performed using ion-imprinted polymer. Box-Behnken design was used in the optimization of the principal variables of pre-concentration.

http://dx.doi.org/10.21577/0103-5053.20180224

Published online: November 13, 2018


J. Braz. Chem. Soc. 2019, 30(4), 882-891

Zinc Ferrite Nanoparticles via Coprecipitation Modified Method: Glycerol as Structure Directing and Stabilizing Agent

Edilan S. Lima; Luelc S. Costa; Gabrielle R. L. M. Sampaio; Edipo S. Oliveira; Erandir B. Silva; Hélio O. Nascimento; Ronaldo F. Nascimento ; Karine O. Moura; Moisés Bastos-Neto; Adonay R. Loiola ; José M. Sasaki

How to cite this article

 

Glycerol proved to be efficient towards the synthesis of well crystalline zinc ferrite nanoparticles, with highlighted characteristics.

http://dx.doi.org/10.21577/0103-5053.20180225

Published online: November 13, 2018

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