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vol. 29, No. 8, 2018, p. 1593-1776

 

Zero-valent copper nanoparticles were used to remove cefadroxil and ceftriaxone beta-lactams antibiotics (removal > 85% within 20 min of reaction). The results indicated that Cu+ species are responsible for degradation, whereas Cu2+ species are responsible for the adsorption of antibiotics and byproducts degradation on the material surface. Details are presented in the Article Removal of Beta-Lactams Antibiotics through Zero-Valent Copper Nanoparticles by Lucas M. F. Oliveira, Mayra A. Nascimento, Yuri M. Guimarães, André F. Oliveira, Antônio A. Silva and Renata P. Lopes on page 1630.



Cover Article
J. Braz. Chem. Soc. 2018, 29(8), 1630-1637

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

How to cite this article

Zero-valent copper nanoparticles were used to remove cefadroxil and ceftriaxone beta-lactams antibiotics (removal > 85% within 20 min of reaction). The results indicated that Cu+ species are responsible for degradation, whereas Cu2+ species are responsible for the adsorption of antibiotics and byproducts degradation on the material surface. Details are presented in the Article Removal of Beta-Lactams Antibiotics through Zero-Valent Copper Nanoparticles by Lucas M. F. Oliveira, Mayra A. Nascimento, Yuri M. Guimarães, André F. Oliveira, Antônio A. Silva and Renata P. Lopes on page 1630.

http://dx.doi.org/10.21577/0103-5053.20180034

Published online: February 27, 2018

Communication J. Braz. Chem. Soc. 2018, 29(8), 1593-1600

Arsenic Speciation in Fish and Rice by HPLC-ICP-MS Using Salt Gradient Elution

Raquel Nogueira; Evyson A. Melo; Jefferson L. C. Figueiredo; Jéssica J. Santos; Antonio P. do Nascimento Neto

How to cite this article

 

AsB, DMA, AsIII, MMA and AsV in rice and fish were separated in 15 min by high-performance liquid chromatography with inductively coupled plasma-mass spectrometer (HPLC-ICP-MS) using an Agilent Bio SAX column and salt gradient elution.

http://dx.doi.org/10.21577/0103-5053.20180091

Published online: May 11, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1601-1606

Chemo-Preventive Functions of Grape Seed Proanthocyanidin Extract against UV‑Induced Intracellular Oxidative Stress and Tyrosinase Activity

Lei Shi; Hua-Lin Tang; Su-Ling Xu

How to cite this article

 

Grape seed proanthocyanidin extract regulates the intracellular reactive oxidative stress and tyrosinase activity originated from UV exposure.

http://dx.doi.org/10.21577/0103-5053.20180098

Published online: May 22, 2018

Articles J. Braz. Chem. Soc. 2018, 29(8), 1607-1611

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180031

Published online: February 26, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1612-1620

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180032

Published online: February 26, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1621-1629

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180033

Published online: February 26, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1630-1637

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180034

Published online: February 27, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1638-1644

(+)-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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180035

Published online: March 1, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1645-1652

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180036

Published online: March 5, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1653-1662

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180038

Published online: March 6, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1663-1671

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180039

Published online: March 7, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1672-1679

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180040

Published online: March 7, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1680-1689

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180042

Published online: March 8, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1690-1700

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

How to cite this article

 

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).

http://dx.doi.org/10.21577/0103-5053.20180043

Published online: March 8, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1701-1706

Fast Spectrophotometric Determination of Iodine Value in Biodiesel and Vegetable Oils

Samara Soares; Fábio R. P. Rocha

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180044

Published online: March 9, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1707-1713

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180045

Published online: March 9, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1714-1720

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

How to cite this article

 

Surface modified silica aerogel nanoparticles.

http://dx.doi.org/10.21577/0103-5053.20180046

Published online: March 13, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1721-1731

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

How to cite this article

 

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).

http://dx.doi.org/10.21577/0103-5053.20180047

Published online: March 13, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1732-1741

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180048

Published online: March 13, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1742-1750

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

How to cite this article

 

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.

http://dx.doi.org/10.21577/0103-5053.20180049

Published online: March 13, 2018

J. Braz. Chem. Soc. 2018, 29(8), 1751-1760

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

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180051

Published online: March 15, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1761-1769

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

How to cite this article

 

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

http://dx.doi.org/10.21577/0103-5053.20180052

Published online: March 16, 2018


J. Braz. Chem. Soc. 2018, 29(8), 1770-1775

Fatty Acid Profile and Milk Cholesterol of Crossbred Holstein × Zebu Cows Fed on Whole Cottonseed

Edvaldo N. Costa; Sibelli P. B. Ferrão; Robério R. Silva; Antonio F. Porto Jr.; Jeanny M. A. Damásio; Bismark M. Santiago; Evely G. L. Costa; Fabiano F. da Silva

How to cite this article

 

In the milk of Holstein × Zebu crossbred cows fed on whole cottonseed, there is a modification of the lipid profile that reduces the concentration of saturated fatty acids (SFA), monounsaturated FA (MFA) and making it rich in polyunsaturated FA (PUFA), which is beneficial to health.

http://dx.doi.org/10.21577/0103-5053.20180053

Published online: March 19, 2018


Additions and Corrections J. Braz. Chem. Soc. 2018, 29(8), 1776

An Environmentally Friendly Procedure to Obtain Flavonoids from Brazilian Citrus Waste

Barbara S. Bellete; Luize Z. Ramin; Deyvid Porto; Alany I. Ribeiro; Moacir R. Forim; Vânia G. Zuin; João B. Fernandes; Maria Fátima G. F. Silva

How to cite this article

 

http://dx.doi.org/10.21577/0103-5053.20180106

Published online: May 30, 2018

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