JBCS

3:54, Sun Dec 8

Open Access/APCs

vol. 30, No. 5, 2019, p. 893-1114

 

Graphene oxides as substrate for paper spray ionization mass spectrometry employed to creatinine determination in urine samples showed to be an accurate and fast methodology. Details are presented in the Article Graphene Oxides Coated Paper as a Substrate to Paper Spray Ionization Mass Spectrometry for Creatinine Determination in Urine Samples by Aline R. Fernandes, Ricardo A. Bernardo, Thays C. de Carvalho, Boniek G. Vaz and Andréa R. Chaves on page 1074.


Cover Article
J. Braz. Chem. Soc. 2019, 30(5), 1074-1081

Graphene Oxides Coated Paper as a Substrate to Paper Spray Ionization Mass Spectrometry for Creatinine Determination in Urine Samples

Aline R. Fernandes; Ricardo A. Bernardo; Thays C. de Carvalho; Boniek G. Vaz; Andréa R. Chaves

How to cite this article

Graphene oxides as substrate for paper spray ionization mass spectrometry employed to creatinine determination in urine samples showed to be an accurate and fast methodology. Details are presented in the Article Graphene Oxides Coated Paper as a Substrate to Paper Spray Ionization Mass Spectrometry for Creatinine Determination in Urine Samples by Aline R. Fernandes, Ricardo A. Bernardo, Thays C. de Carvalho, Boniek G. Vaz and Andréa R. Chaves on page 1074.

http://dx.doi.org/10.21577/0103-5053.20190007

Published online: January 11, 2019
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Articles J. Braz. Chem. Soc. 2019, 30(5), 893-903

The Role of L-Proline and Co-Catalysts in the Enantioselectivity of OXA‑Michael‑Henry Reactions

Lucas F. do Carmo; Simone C. Silva; Matheus V. Machado; Paloma S. Prata ; Alberto Wisniewski Júnior; Diogo M. Vidal; José Augusto F. P. Villar

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In this work, it was carried out a study of the OXA-Michael-Henry reactions between salicylaldehyde and β-nitrostyrenes, catalyzed by L-proline. The corresponding (R)-3-nitro-2-phenyl-2H-chromenes were obtained in 25-55% enantiomeric excess (ee) (20 mol% L-proline) and 50-70% ee (stoichiometric amount) employing Ti(OiPr)4 as Lewis acid.

http://dx.doi.org/10.21577/0103-5053.20180226

Published online: November 16, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 904-914

Inorganic and Organic Acids in the Atmosphere of the Urban Area of the City of Salvador, Brazil

Lícia P. S. Cruz ; Elisvan R. Mota; Vânia P. Campos; Franciele O. Santana; Sâmeque R. Luz; Daniela F. Santos

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Organic and inorganic acids were measured in the air of Salvador City and correlations were identified between these acids, criteria air pollutants and meteorological parameters.

http://dx.doi.org/10.21577/0103-5053.20180227

Published online: November 22, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 915-929

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

Anugrah Ricky Wijaya ; Bambang Semedi; Retno Ariadi Lusiana; Alrum Armid; Muntholib Muntholib

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The level of metal contents of Ca, Fe, Mn, Cu, Pb and 207Pb / 206Pb vs. 208Pb / 206Pb in the Gulf of Prigi reflected by natural sources such as mineral sources from marine sediment.

http://dx.doi.org/10.21577/0103-5053.20180228

Published online: November 22, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 930-938

Seasonal and Circadian Study of a Thymol/γ-Terpinene/p-Cymene Type Oil of Ocimum gratissimum L. and its Antioxidant and Antifungal Effects

Joaquim A. M. de Castro ; Odair S. Monteiro; Denise F. Coutinho; Antonia A. C. Rodrigues; Joyce K. R. da Silva; José G. S. Maia

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Ocimum gratissimum oil showed significant variation in its thymol/γ-terpinene/p-cymene chemotype during the seasonal and circadian studies. Probable synergistic action of these constituents contributes to the antioxidant and antifungal potential of the plant.

http://dx.doi.org/10.21577/0103-5053.20180237

Published online: December 5, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 939-947

Identificaton of the Alarm and Sex Pheromones of the Leaf‑Footed Bug, Leptoglossus zonatus (Heteroptera: Coreidae)

Katia M. Inoue; Diogo M. Vidal; Emir B. Saad; Camila B. C. Martins; Paulo H. G. Zarbin

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Sex and alarm pheromones emitted by Leptoglossus zonatus adults and nymphs.

http://dx.doi.org/10.21577/0103-5053.20180238

Published online: December 10, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 948-967

Facial Selectivity between Carbohydrates and Aromatic Amino Acids Explained by a Combination of NCI, NBO and EDA Techniques with NMR Spectroscopy

Thiago C. Rozada ; Ulisses Z. de Melo ; Rodrigo M. Pontes; Roberto Rittner; Ernani A. Basso

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Analysis of the intermolecular interactions between carbohydrates and aromatic amino acids through 1H nuclear magnetic resonance (NMR) and density functional theory (DFT) calculations, employing non-covalent interactions (NCI), natural bond orbital (NBO), and energy decomposition analyses (EDA) methodologies, showed the importance of the dispersion component of the intermolecular interaction for the recognition of carbohydrates by aromatic amino acids and the electrostatic component for the differentiation between the faces of the monosaccharide.

http://dx.doi.org/10.21577/0103-5053.20180241

Published online: December 11, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 968-977

Influence of Seasonality and Sunlight Effects on Rollinia mucosa Leaves Fingerprint

Sabrina Afonso; Fabiano B. Silva; Gustavo G. Marcheafave; Pedro H. Hatumura; Roy E. Bruns; Ieda S. Scarminio

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Fingerprinting analytical techniques associated with chemometric analysis and mixture design enabled the chemical discrimination of the sun-exposed and self-shaded leaves of Rollinia mucosa in each of the four seasons.

http://dx.doi.org/10.21577/0103-5053.20180242

Published online: December 13, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 978-987

Application of LC-DAD Metabolic Fingerprinting in Combination with PCA for Evaluation of Seasonality and Extraction Method on the Chemical Composition of Accessions from Lippia alba (Mill.) N. E. Brown and Biological Activities

Raphael A. de Jesus; Vilma M. J. Prado; Vanderson S. Pinto; Valdenizia R. Silva; Luciano S. Santos; Paulo C. L. Nogueira; Sandro Navickiene; Edenir R. Pereira-Filho ; Arie F. Blank; Daniel P. Bezerra ; Milena B. P. Soares; Claudia Seidl; Carmen L. Cardoso; Valéria R. S. Moraes

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Fingerprinting chromatograms from Lippia alba (Mill.) N. E. Brown extracts and PC1 vs. PC2 scores graph.

http://dx.doi.org/10.21577/0103-5053.20180244

Published online: December 13, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 988-996

Fluorescent Sensors Based on Cu-Doped Carbon Quantum Dots for the Detection of Rutin

Cheng-ya Wang; Shanzhai Shang; Xudong Zheng; Ping Lei; Jingmei Han; Linda Yuan; Zhiqiang Li; Ru Wang; Weimin Gong; Jianguo Tang; Yaling Yang

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Schematic illustration of the sensitive fluorescence detection of rutin (RT) based on Cu-doped carbon quantum dots (Cu-CQDs).

http://dx.doi.org/10.21577/0103-5053.20180245

Published online: December 14, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 997-1009

APCI(+)FT-ICR MS Analysis of Hydrocarbons Using Isooctane as Ionizing Reagent - A Comparison with HTGC-FID, GCxGC-MS and NMR

Lilian V. Tose; Samantha R. C. Silva; Eliane V. Barros; Lindamara M. Souza; Fernanda E. Pinto; Debora K. Palomino; Jair C. C. Freitas; Christopher J. Thompson; Boniek G. Vaz; Valdemar Lacerda Jr. ; Wanderson Romao

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Five paraffin standards of different average molar mass distributions (Mw) were easily ionized by atmospheric pressure chemical ionization Fourier transform ion cyclotron resonance mass spectrometer (APCI(+)FT-ICR MS) using isooctane as the reagent gas. Data obtained from APCI(+) analysis were compared to results obtained from analysis of high temperature gas chromatography with a flame ionization detector (HTGC-FID), GCxGC-MS and 1H and 13C nuclear magnetic resonance (NMR) spectroscopy.

http://dx.doi.org/10.21577/0103-5053.20180249

Published online: December 18, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1010-1024

Photodegradation of Fluoxetine Applying Different Photolytic Reactors: Evaluation of the Process Efficiency and Mechanism

Ailton J. Moreira ; Aline C. Borges; Bianca B. de Sousa ; Vagner R. de Mendonça; Carolina D. Freschi; Gian P. G. Freschi

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Kinetics of degradation of fluoxetine through ultraviolet (UV) and UV/microwave (MW) processes as mediators of direct photolysis and formation of hydroxyl radicals.

http://dx.doi.org/10.21577/0103-5053.20180250

Published online: December 19, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1025-1033

Oxidative Dehydration of Glycerol over Molybdenum- and Vanadium-Based Catalysts

Franciel A. Bezerra; Heitor O. N. Altino; Ricardo R. Soares

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The figure shows the increase in the selectivity to acrolein, through oxidative dehydration of glycerol, when vanadium and molybdenum are supported on alumina, maintaining low selectivity for COx.

http://dx.doi.org/10.21577/0103-5053.20180251

Published online: December 20, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1034-1044

Antioxidant Activity and Metabolomic Analysis of Cagaitas (Eugenia dysenterica) Using Paper Spray Mass Spectrometry

Mauro R. Silva; Lucas G. Freitas; Amauri G. Souza; Raquel L. B. Araújo; Inayara C. A. Lacerda; Hebert V. Pereira; Rodinei Augusti ; Júlio O. F. Melo

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Discrimination of Eugenia dysenterica using paper spray mass spectrometry.

http://dx.doi.org/10.21577/0103-5053.20190002

Published online: January 8, 2019
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J. Braz. Chem. Soc. 2019, 30(5), 1045-1054

Functionalized Dienes: A New Series of Potential Agents for the Treatment of Alzheimer's Disease

Aldo S. Oliveira ; Lidiane Meier; Eduardo Zapp; Daniela Brondani; Inês M. C. Brighente; Marcus M. Sá

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Functionalized dienes as potential multi-targeted therapeutics for Alzheimer's disease.

http://dx.doi.org/10.21577/0103-5053.20190004

Published online: January 9, 2019
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J. Braz. Chem. Soc. 2019, 30(5), 1055-1062

Identification of Extra Virgin Olive Oils Modified by the Addition of Soybean Oil, Using Ion Chromatography

Patrícia T. Souza; Marina Ansolin; Eduardo A. C. Batista; Antonio J. A. Meirelles; Matthieu Tubino

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The modification of four extra virgin olive oils from different origins with refined soybean oil, in the proportions of 0, 5, 10, 20 and 30% m/m, was studied using two approaches. First, the induction period (IP) was determined by Rancimat. In the second strategy, ion chromatography was used to quantify the formic and acetic acids, in their carboxylate forms (formate and acetate).

http://dx.doi.org/10.21577/0103-5053.20190005

Published online: January 11, 2019
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J. Braz. Chem. Soc. 2019, 30(5), 1063-1073

Lipid Profile Determination by Direct Infusion ESI-MS and Fatty Acid Composition by GC-FID in Human Milk Pools by Folch and Creamatocrit Methods

Adriela A. Rydlewski ; Patrícia D. Silva; Luciana P. Manin; Christyna B. G. Tavares; Meliana G. Paula; Ingrid L. Figueiredo ; Vanessa B. M. J. C. Neia; Oscar O. Santos; Jesuí V. Visentainer

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Lipids of human milk are extremely important nutrients for the baby proper development. This study assessed the fat content, lipid profile and fatty acid composition in pools of human milk, comparing the reference method with the creamatocrit method employed in human milk banks.

http://dx.doi.org/10.21577/0103-5053.20190006

Published online: January 11, 2019
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J. Braz. Chem. Soc. 2019, 30(5), 1074-1081

Graphene Oxides Coated Paper as a Substrate to Paper Spray Ionization Mass Spectrometry for Creatinine Determination in Urine Samples

Aline R. Fernandes; Ricardo A. Bernardo; Thays C. de Carvalho; Boniek G. Vaz; Andréa R. Chaves

How to cite this article

 

A fast and reliable methodology for creatinine determination in urine samples using graphene oxide paper by paper spray ionization mass spectrometry.

http://dx.doi.org/10.21577/0103-5053.20190007

Published online: January 11, 2019
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Short Report J. Braz. Chem. Soc. 2019, 30(5), 1082-1088

A Novel Thermal Infrared Enthalpimetric Method for Fast, High-Throughput Determination of the Content Uniformity of Captopril Tablets

Flavia M. Dalla Nora; Alessandra S. Oliveira; Bruna N. Lucas; Daniele F. Ferreira; Fabio A. Duarte; Adilson B. Costa; Fabiana E. B. Silva; Juliano S. Barin

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Captopril tablets were dissolved in the wells of a microplate. The reaction between captopril and iodine solutions releases heat and the temperature of solutions rise. Infrared thermal imaging was used for simultaneous temperature monitoring of several wells and the temperature increase was directly related to the amount of captopril.

http://dx.doi.org/10.21577/0103-5053.20180240

Published online: December 11, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1089-1094

A Fast, Low-Cost, and Environmental Friendly Micro-Flow-Batch Analyzer for Photometric Determination of Sulfites in Beverages

Márcio R. S. Tavares; Stéfani I. E. Andrade ; Marcelo B. Lima; Inaka S. Barreto; Mário C. U. de Araújo; Luciano F. Almeida

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A micro-flow-batch analyzer for sulfite determination in wines, whiskies, vodkas and beers.

http://dx.doi.org/10.21577/0103-5053.20180243

Published online: December 13, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1095-1102

One-Pot Synthesis of NEMP, a VX Surrogate, and Reactivation of NEMP-Inhibited Electrophorus Eel Acetylcholinesterase by Current Antidotes

Samir F. A. Cavalcante ; Daniel A. S. Kitagawa; Rafael B. Rodrigues; Taynara C. Silva; Leandro B. Bernardo; Ana Beatriz A. Correa; Alessandro B. C. Simas

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The structural similarity between venomous agent X (VX) and O-(4-nitrophenyl) O-ethyl methylphosphonate (NEMP) makes the latter a valuable tool for research on novel acetylcholinesterase reactivators.

http://dx.doi.org/10.21577/0103-5053.20180246

Published online: December 14, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1103-1107

Flavonol Tri-O-glycoside and Other Chemical Constituents from Flowers of Aristolochia trulliformis

Juliana C. Holzbach; Walter A. Soares Filho; Camila L. Cunha; Isabele R. Nascimento

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A new flavonol triglycoside was isolated from Aristolochia trulliformis flowers together with 15 known compounds.

http://dx.doi.org/10.21577/0103-5053.20180247

Published online: December 14, 2018
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J. Braz. Chem. Soc. 2019, 30(5), 1108-1114

Determination of the Antioxidant Capacity of Red Fruits by Miniaturized Spectrophotometry Assays

Magda M. Becker ; Gilvanda S. Nunes; Danilo B. Ribeiro; Francisco E. P. S. Silva; Gaëlle Catanante; Jean‑Louis Marty

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Miniaturized spectrophotometric assays were used to determine the antioxidant potential in strawberry and cherry fruits. Simultaneous analysis employing a reduced amount of samples and reagents were performed. Strawberry fruit showed a higher source of bioactive compounds.

http://dx.doi.org/10.21577/0103-5053.20190003

Published online: January 8, 2019
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Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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