JBCS

19:33, Thu Mar 21

Open Access/APCs

vol. 30, No. 2, 2019, p. 211-424

 

The presence of antibiotics in water has become a worldwide concern. Adsorbents based on mesoporous iron oxide containing surface [FeOx(OH)y] sites were produced for the efficient adsorption of β-lactam antibiotics. The findings demonstrated a special interaction between amoxicillin and the surface iron oxyhydroxide species. Details are presented in the Artice Controlled Dehydration of Fe(OH)3 to Fe2O3: Developing Mesopores with Complexing Iron Species for the Adsorption of β-Lactam Antibiotics by Paula S. Pinto, Giovani D. Lanza, José D. Ardisson and Rochel M. Lago on page 310.


Cover Article
J. Braz. Chem. Soc. 2019, 30(2), 310-317

Controlled Dehydration of Fe(OH)3 to Fe2O3: Developing Mesopores with Complexing Iron Species for the Adsorption of β-Lactam Antibiotics

Paula S. Pinto; Giovani D. Lanza; José D. Ardisson; Rochel M. Lago

How to cite this article

The presence of antibiotics in water has become a worldwide concern. Adsorbents based on mesoporous iron oxide containing surface [FeOx(OH)y] sites were produced for the efficient adsorption of β-lactam antibiotics. The findings demonstrated a special interaction between amoxicillin and the surface iron oxyhydroxide species. Details are presented in the Artice Controlled Dehydration of Fe(OH)3 to Fe2O3: Developing Mesopores with Complexing Iron Species for the Adsorption of β-Lactam Antibiotics by Paula S. Pinto, Giovani D. Lanza, José D. Ardisson and Rochel M. Lago on page 310.

http://dx.doi.org/10.21577/0103-5053.20180179

Published online: September 13, 2018

Articles J. Braz. Chem. Soc. 2019, 30(2), 211-223

Encapsulating TiO2 into Polyvinyl Alcohol Coated Polyacrylonitrile Composite Beads for the Effective Removal of Methylene Blue

Zhenhua Han; Jiali Jin; Yuchao Wang; Zihui Zhang; Junjie Gu; Minrui Ou; Xiaoping Xu

How to cite this article

 

Polyacrylonitrile (PAN)/polyvinyl alcohol (PVA)/TiO2 (PPT) beads structure and removal of methylene blue (MB) under visible light irradiation.

http://dx.doi.org/10.21577/0103-5053.20180170

Published online: August 31, 2018

J. Braz. Chem. Soc. 2019, 30(2), 224-233

High Uranium Concentrations in the Groundwater of the Rio de Janeiro State, Brazil, Mountainous Region

José M. Godoy ; Paulo R. Ferreira; Elder M. de Souza; Larisse I. da Silva; Isabela C. S. Bittencourt ; Felipe Fraifeld

How to cite this article

 

Uranium concentrations higher than the Brazilian regulatory limits were observed in several groundwater wells in the mountainous region near Rio de Janeiro City. Clear water does not mean uncontaminated water.

http://dx.doi.org/10.21577/0103-5053.20180171

Published online: September 3, 2018

J. Braz. Chem. Soc. 2019, 30(2), 234-246

Physicochemical Characterizations and Antioxidant Property of Copaiba Oil Loaded into SNEDDS Systems

Denise P. Emerenciano ; Bernardo B. D. Baracho; Melyssa L. de Medeiros; Hugo A. O. Rocha; Francisco H. Xavier Jr.; Valdir F. da Veiga Jr.; Maria Aparecida M. Maciel

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Copaiba oil-resin loaded into self-nanoemulsion drug delivery systems (SNEDDS) were obtained in order to improve the solubility and bioavailability of this natural oil.

http://dx.doi.org/10.21577/0103-5053.20180172

Published online: September 4, 2018

J. Braz. Chem. Soc. 2019, 30(2), 247-255

SPME Fiber Evaluation for Volatile Organic Compounds Extraction from Acerola

Yesenia M. García; José C. M. Rufini; Matheus P. Campos; Mayara N. S. Guedes; Rodinei Augusti ; Júlio O. F. Melo

How to cite this article

 

Extraction of volatile organic compounds from acerola fruits through the use of different solid phase microextraction (SPME) fibers.

http://dx.doi.org/10.21577/0103-5053.20180173

Published online: September 4, 2018

J. Braz. Chem. Soc. 2019, 30(2), 256-264

Biomonitoring of Toxic Elements in Plants Collected Near Leather Tanning Industry

Alex R. H. De La Cruz; Lorreine D. S. C. Ferreira; Vinicius P. Andrade; Adriana Gioda

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The leather industry has significant economic influence; however, it suffers from the negative impact due to environmental pollution caused by tannery wastes produced during leather processing.

http://dx.doi.org/10.21577/0103-5053.20180174

Published online: September 4, 2018

J. Braz. Chem. Soc. 2019, 30(2), 265-278

2D, 3D and Hybrid QSAR Studies of Nostoclide Analogues as Inhibitors of the Photosystem II

Pedro O. M. de Carvalho; Márcia M. C. Ferreira

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2D and 3D molecular descriptors were calculated, selected and used to build quantitative structure-activity relationship (QSAR) models to predict the herbicide activity of a set of nostoclide analogues (experimental data retrieved from the literature). The models were interpreted to understand the ligand-receptor interactions.

http://dx.doi.org/10.21577/0103-5053.20180175

Published online: September 11, 2018


J. Braz. Chem. Soc. 2019, 30(2), 279-285

Maximal Information Coefficient and Support Vector Regression Based Nonlinear Feature Selection and QSAR Modeling on Toxicity of Alcohol Compounds to Tadpoles of Rana temporaria

Lifeng Wang; Pengwei Xing ; Cong Wang; Xiaomao Zhou; Zhijun Dai; Lianyang Bai

How to cite this article

 

Given a dataset, first, use maximum information coefficient (MIC-filter), support vector regression backward elimination (SVR-BE) and minimal redundancy maximal relevance (mRMR-MIC) to select features. Second, use the multiple linear regression (MLR), partial least square regression (PLS) and support vector regression (SVR) to build quantitative structure activity relationship (QSAR) models.

http://dx.doi.org/10.21577/0103-5053.20180176

Published online: September 11, 2018

J. Braz. Chem. Soc. 2019, 30(2), 286-304

Antimicrobial, Anti-Inflammatory and Antioxidant Activities of Polyoxygenated Chalcones

Yesseny A. Vásquez-Martínez; Mauricio E. Osorio ; Diego A. San Martín; Marcela A. Carvajal; Alejandra P. Vergara; Elizabeth Sanchez; Marcela Raimondi; Susana A. Zacchino; Carolina Mascayano; Claudia Torrent; Francisco Cabezas; Sophia Mejias; Margarita Montoya; Marcelo Cortez‑San Martín

How to cite this article

 

Nine simple polyoxygenated chalcones were synthesized to evaluate their antimicrobial, anti-inflammatory and antioxidant activities.

http://dx.doi.org/10.21577/0103-5053.20180177

Published online: September 13, 2018


J. Braz. Chem. Soc. 2019, 30(2), 305-309

Influence of Electrooxidation of Ni Wire Electrodes on the Kinetics of Oxygen Evolution Reaction Studied in 0.1 mol dm-3 NaOH

Andrii Slis; Tomasz Mikolajczyk ; Boguslaw Pierozynski

How to cite this article

 

Oxygen evolution reaction (OER) on nickel wire with nickel oxyhydroxide layer.

http://dx.doi.org/10.21577/0103-5053.20180178

Published online: September 13, 2018

J. Braz. Chem. Soc. 2019, 30(2), 310-317

Controlled Dehydration of Fe(OH)3 to Fe2O3: Developing Mesopores with Complexing Iron Species for the Adsorption of β-Lactam Antibiotics

Paula S. Pinto; Giovani D. Lanza; José D. Ardisson; Rochel M. Lago

How to cite this article

 

The evolution of the iron hydroxide to produce mesopores containing [FeOx(OH)y] surface sites capable of complexing the amoxicillin molecules.

http://dx.doi.org/10.21577/0103-5053.20180179

Published online: September 13, 2018


J. Braz. Chem. Soc. 2019, 30(2), 318-325

Fast Determination of Iodine Number of Biodiesel Using Capillary Zone Electrophoresis with Multi- and Single-Point Calibration

Alysson V. F. Sako; Gustavo A. Micke

How to cite this article

 

Strategy for fast determination of iodine number of biodiesel samples by capillary zone electrophoresis (CZE). Low sample amount (mg), reactant (µL), and organic solvent (µL) are required.

http://dx.doi.org/10.21577/0103-5053.20180180

Published online: September 17, 2018


J. Braz. Chem. Soc. 2019, 30(2), 326-332

Potential Slow Release Fertilizers and Acid Soil Conditioners Obtained by One-Pot Mechanochemical Activation of Chrysotile:Cement Roofing Sheets with K2HPO4

Roger Borges; Fernando Wypych

How to cite this article

 

Chrysotile:cement sheets were milled with K2HPO4 and the amorphous mixture, free of fibers, presents a potential fertilizer and soil conditioner behavior.

http://dx.doi.org/10.21577/0103-5053.20180181

Published online: September 17, 2018

J. Braz. Chem. Soc. 2019, 30(2), 333-341

Antimicrobial Potential of Natural and Semi-Synthetic ent-Kaurane and ent-Pimarane Diterpenes against Clinically Isolated Gram-Positive Multidrug-Resistant Bacteria

Ana Carolina F. Soares; Priscilla M. Matos; Karime F. da Silva; Carlos H. G. Martins; Rodrigo C. S. Veneziani ; Sérgio R. Ambrósio; Herbert J. Dias; Raquel A. dos Santos; Vladimir C. G. Heleno

How to cite this article

 

Two natural diterpenes were evaluated against multi-drug resistant (MDR) Gram-positive bacteria and were converted into 28 semi-synthetic derivatives. Both natural compounds displayed interesting activity overall, but not so good against Staphylococcus aureus, a relevant multi-resistant pathogen. The activities of all derivatives were determined what revealed one with good overall activity and with a noteworthy activity against S. aureus. All other results could further clarify some structure-antimicrobial activity relationship questions about diterpenes.

http://dx.doi.org/10.21577/0103-5053.20180182

Published online: September 18, 2018


J. Braz. Chem. Soc. 2019, 30(2), 342-349

Biodiesel Synthesis: Influence of Alkaline Catalysts in Methanol-Oil Dispersion

José G. Rocha Jr. ; Andreza D. M. Mendonça; Daniel A. R. de Campos; Renilson O. Mapele; Cristina M. Barra; Glauco F. Bauerfeldt; Matthieu Tubino

How to cite this article

 

Methyl esters and alkaline catalysts are adsorbed on the surface of the methanol oil, favoring the dispersion of the methanol in the oil phase. The adsorption of potassium is greater than that of sodium.

http://dx.doi.org/10.21577/0103-5053.20180183

Published online: September 18, 2018

J. Braz. Chem. Soc. 2019, 30(2), 350-358

Fast Triacylglycerol Screening and Semi-Quantitative Analysis of Fatty Acids in Commercial Oils by DIMS with 18-Crown-6 Ether/Trifluoracetic Acid Dopants

Angelica P. P. Tonin ; Marcos A. S. Ribeiro; Camila B. Poliseli; Roberta da Silveira; Jesuí V. Visentainer; Valquíria M. Silva; Leomara F. Ribeiro; Rodrigo C. T. de Souza; Cláudio C. de Oliveira ; Eduardo C. Meurer

How to cite this article

 

Simple and rapid analysis of commercial oils by direct injection electrospray ionization mass spectrometry (DIMS) and identification of adulteration in olive oil.

http://dx.doi.org/10.21577/0103-5053.20180184

Published online: September 20, 2018

J. Braz. Chem. Soc. 2019, 30(2), 359-370

Catalytic Cracking of Soybean Oil for Biofuel over γ-Al2O3/CaO Composite Catalyst

Zhi Zheng ; Tong Lei; Jun Wang; Yi Wei; Xuejun Liu; Fengwen Yu; Jianbing Ji

How to cite this article

 

Catalytic cracking of soybean oil for biofuel over γ-Al2O3/CaO composite catalysts was conducted in a fixed-bed reactor. The biofuel showed similar chemical composition and fuel properties (low acid value and high calorific value) with the petroleum-based fuel due to the acid-base characters of γ-Al2O3/CaO composite catalysts.

http://dx.doi.org/10.21577/0103-5053.20180185

Published online: September 21, 2018

J. Braz. Chem. Soc. 2019, 30(2), 371-378

Recombination Study of Dye Sensitized Solar Cells with Natural Extracts

Gideã T. Tractz; Aline Viomar; Bianca V. Dias; Camila A. de Lima ; Everson P. Banczek; Maico T. da Cunha; Sandra R. M. Antunes; Paulo R. P. Rodrigues

How to cite this article

 

In this study, frequency domain techniques are used to examine electron transport and dye recombination in natural dye sensitized solar cells.

http://dx.doi.org/10.21577/0103-5053.20180186

Published online: September 21, 2018

J. Braz. Chem. Soc. 2019, 30(2), 379-387

Evaluation of the Influence of Extraction Conditions on the Isolation and Identification of Volatile Compounds from Cagaita (Eugenia dysenterica) Using HS-SPME/GC-MS

Mauro R. Silva; Gustavo H. Bueno; Raquel L. B. Araújo; Inayara C. A. Lacerda; Lucas G. Freitas; Harriman A. Morais; Rodinei Augusti ; Júlio O. F. Melo

How to cite this article

 

Conditions optimization of extraction of volatile compounds from fruit of Eugenia dysenterica using different solid-phase microextraction (SPME) fibers.

http://dx.doi.org/10.21577/0103-5053.20180187

Published online: September 21, 2018


J. Braz. Chem. Soc. 2019, 30(2), 388-397

Floral Scent and Nectar Sugar Composition of Temnadenia odorifera (Apocynoideae, Apocynaceae)

Rafael F. Silva ; Natália A. B. Tinoco; Anna Tsukui; Cristiana Koschnitzke; Inara C. Silva-Batista; Claudia M. Rezende; Humberto R. Bizzo

How to cite this article

 

Analysis of the chemical composition of the attractants and floral resources available in T. odorifera provided a broader understanding of the mechanisms responsible for plant-insect interactions.

http://dx.doi.org/10.21577/0103-5053.20180188

Published online: September 24, 2018


J. Braz. Chem. Soc. 2019, 30(2), 398-405

Green Chemistry Method Based on PARAFAC EEM Data Modeling for Benzo[a]pyrene Quantitation in Distilled Spirit

Amanda C. Silva; Licarion Pinto; Adriano A. Gomes; Mario C. U. Araujo

How to cite this article

 

Procedure of benzo[a]pyrene (BaP) quantification in cachaças using PARAFAC to overcome the interferences.

http://dx.doi.org/10.21577/0103-5053.20180189

Published online: September 24, 2018

J. Braz. Chem. Soc. 2019, 30(2), 406-412

New Antiproliferative Polyunsaturated Epoxy-Heneicosane Derivatives Isolated from the Brown Alga Lobophora variegata

Fábio N. Ávila; Francisco C. L. Pinto; Pedro B. M. Carneiro ; Kayanny Q. Ferreira; Diego V. Wilke; Nádia A. P. Nogueira; Edilberto R. Silveira ; Otília Deusdênia L. Pessoa

How to cite this article

 

Two new polyunsaturated 3,4-epoxy-heneicosane derivatives named as epoxy-lobophorene A and B were isolated from the brown alga Lobophora variegata and presented a moderate antiproliferative effect against tumor cell lines.

http://dx.doi.org/10.21577/0103-5053.20180190

Published online: September 24, 2018


J. Braz. Chem. Soc. 2019, 30(2), 413-424

Carbon in Physical Fractions and Organic Matter Chemical Composition of an Acrisol after Amazon Forest Burning and Conversion into Pasture

Otávio A. Leal ; Deborah P. Dick; Falberni S. Costa; Heike Knicker; João A. de Carvalho Júnior; José C. Santos

How to cite this article

 

Soil carbon stocks and organic matter composition (assessed by 13C NMR spectroscopy) in an Acrisol under native Amazon Forest and natural regeneration or pasture cultivation after native Amazon Forest slash-and-burn, which emitted 74 Mg ha-1 of carbon to the atmosphere.

http://dx.doi.org/10.21577/0103-5053.20180191

Published online: September 26, 2018

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