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Current Issue vol. 26, No. 4, 2015, p. 633-829

 

From Caesalpinia pluviosa var. peltophoroides to cytotoxic effect of Caesalpinioflavone in a systematic guide for testing biological activities of novel Natural Products. Details are presented in the Article Caesalpinioflavone, a New Cytotoxic Biflavonoid Isolated from Caesalpinia pluviosa var. peltophoroides by João L. B. Zanin, Murilo Massoni, Marcelo H. dos Santos, Giovana C. de Freitas, Evandro L. O. Niero, Renata R. Schefer, João H. G. Lago, Marisa Ionta and Marisi G. Soares on page 804.


Cover Article
J. Braz. Chem. Soc. 2015, 26(4), 804-809

Caesalpinioflavone, a New Cytotoxic Biflavonoid Isolated from Caesalpinia pluviosa var. peltophoroides

João L. B. Zanin; Murilo Massoni; Marcelo H. dos Santos; Giovana C. de Freitas; Evandro L. O. Niero; Renata R. Schefer; João H. G. Lago; Marisa Ionta; Marisi G. Soares

How to cite this article

From Caesalpinia pluviosa var. peltophoroides to cytotoxic effect of Caesalpinioflavone in a systematic guide for testing biological activities of novel Natural Products. Details are presented in the Article Caesalpinioflavone, a New Cytotoxic Biflavonoid Isolated from Caesalpinia pluviosa var. peltophoroides by João L. B. Zanin, Murilo Massoni, Marcelo H. dos Santos, Giovana C. de Freitas, Evandro L. O. Niero, Renata R. Schefer, João H. G. Lago, Marisa Ionta and Marisi G. Soares on page 804.

http://dx.doi.org/10.5935/0103-5053.20150043

Published online: February 24, 2015
Articles J. Braz. Chem. Soc. 2015, 26(4), 633-641

Novel N-Acylated Benzimidazolone Derivatives: Synthesis, 2D-QSAR and Targets Prediction

Shaopeng Wei; Zhiqin Ji

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A series of novel N-acylated benzimidazolone derivatives were synthesized, and their antifungal activity, 2D-quantitative structure-activity relationship (2D-QSAR) and potential targets were studied.

http://dx.doi.org/10.5935/0103-5053.20150019

Published online: February 6, 2015

J. Braz. Chem. Soc. 2015, 26(4), 642-648

Fast Classification of Different Oils and Routes Used in Biodiesel Production Using Mid Infrared Spectroscopy and PLS2-DA

Sarmento J. Mazivila; Hery Mitsutake; Felipe B. de Santana; Lucas C. Gontijo; Douglas Q. Santos; Waldomiro Borges Neto

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Simultaneous classification of type of biodiesels using mid-infrared spectroscopy data and partial least square discriminant analysis (PLS2-DA).

http://dx.doi.org/10.5935/0103-5053.20150020

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 649-659

HPLC-DAD and UV-Vis Spectrophotometric Methods for Methotrexate Assay in Different Biodegradable Microparticles

Alice R. Oliveira; Lilia B. Caland; Edilene G. Oliveira; Eryvaldo S. T. Egito; Matheus F. F. Pedrosa; Arnóbio A. Silva Júnior

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High Performance Liquid Chromatography (HPLC) and UV-Vis spectrophotometric methods were developed and validated for analytical quantification of methotrexate (MTX) loaded in biodegradable microparticles produced by the spray-drying technique.

http://dx.doi.org/10.5935/0103-5053.20150022

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 660-666

Main Degradation Products of Dabigatran Etexilate Evaluated by LC-UV and LC-ESI-MS, Degradation Kinetics and in vitro Cytotoxicity Studies

Raquel M. Bernardi; Felipe B. D'Avila; Vítor Todeschini; Juliana M. M. Andrade; Pedro E. Fröehlich; Ana M. Bergold

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Chemical structure of the new oral anticoagulant dabigatran etexilate (DAB) and proposed structures of their degradation products.

http://dx.doi.org/10.5935/0103-5053.20150023

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 667-675

Visualisation of the Galvanic Effects at Welds on Carbon Steel

Josias F. Pagotto; Maria F. Montemor; Francisco J. Recio; Artur J. Motheo; Alda M. Simões; Pilar Herrasti

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Comparative analysis of three techniques: localized electrochemical impedance spectroscopy (LEIS), technique of scanning vibrating electrode (SVET) and optical microscopy (OM) applied to the experimental setup carbon steel (base) and carbon steel subjected to tungsten inert gas (TIG) weld. Analysis after 2 h with electrodes electrically connected immersed in NaCl 0.05 mol L-1.

http://dx.doi.org/10.5935/0103-5053.20150024

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 676-686

Application of Headspace Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry (HS-SPME-GC/MS) on the Evaluation of Degradation Efficiency of Phenolic Compounds and Identification of By-Products from Produced Water

Cesar A. Silva; Luiz A. S. Madureira

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Determination of phenols in produced water and possible generated by-products formed during photochemical degradation processes by HS-SPME-GC/MS. Optimum experimental conditions enabled degradation of more than 99% of the initial concentrations of the total phenolic components of produced water.

http://dx.doi.org/10.5935/0103-5053.20150026

Published online: February 6, 2015

J. Braz. Chem. Soc. 2015, 26(4), 687-694

Ozone Treatment for the Removal of Residual Chlorothalonil and Effects on the Quality of Table Grapes

Fernanda F. Heleno; Maria E. L. R. de Queiroz; Antônio A. Neves; Lêda R. A. Faroni; Flaviane A. de Sousa; André F. de Oliveira

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A treatment to remove pesticide from table grapes using ozone gas is presented.

http://dx.doi.org/10.5935/0103-5053.20150027

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 695-704

CO Oxidation Catalyzed by Ag Nanoparticles Supported on SnO/CeO2

Inayat A. Khan; Nida Sajid; Amin Badshah; Muhammad H. S. Wattoo; Dalaver H. Anjum; Muhammad A. Nadeem

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The catalyst bed Ag-Sn/CeO2 (4%) converts CO and O2 to CO2 with 99% conversion efficiency at 100 °C. The electrochemical equations summarize the electron exchange process.

http://dx.doi.org/10.5935/0103-5053.20150028

Published online: February 6, 2015
J. Braz. Chem. Soc. 2015, 26(4), 705-712

Can Ergosterol Be an Indicator of Fusarium Fungi and Mycotoxins in Cereal Products?

Ewa Stanisz; Agnieszka Zgoła-Grześkowiak; Agnieszka Waśkiewicz; Łukasz Stępień; Monika Beszterda

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Determination of ergosterol as indicator of fungal contamination and selected mycotoxins was done in several samples of grain products to examine existence of possible correlations between these compounds. Fungi responsible for contamination were also identified.

http://dx.doi.org/10.5935/0103-5053.20150030

Published online: February 10, 2015

J. Braz. Chem. Soc. 2015, 26(4), 713-722

Simultaneous Determination of Ascorbic Acid, L-Dopa, Uric Acid, Insulin, and Acetylsalicylic Acid on Reactive Blue 19 and Multi-Wall Carbon Nanotube Modified Glassy Carbon Electrode

Navid Nasirizadeh; Zahra Shekari; Masoumeh Tabatabaee; Masoud Ghaani

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A new trifunctional sensor, based on a reactive blue 19 and multi-wall carbon nanotube modified glassy carbon electrode (RB-MWCNT-GCE), was constructed. RB-MWCNT-GCE was applied for simultaneous determination of ascorbic acid (AA), levodopa (LD), uric acid (UA), insulin, and acetylsalicylic acid (ASA) in mixture.

http://dx.doi.org/10.5935/0103-5053.20150031

Published online: February 10, 2015

J. Braz. Chem. Soc. 2015, 26(4), 723-728

Virginicin, a New Naphthalene from Kosteletzkya virginica (Malvaceae)

Bai Bai; Xu-Wei Gu; Yu Chen; Fu-Qin Guan; Yu Shan; Xu Feng

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A new naphthalene, 8-methoxy-2,7-dihydroxyl-4-(1'-hydroxyl-isopropyl)-6-methyl-1-naphthaldehyde was isolated from the tubers of Kosteletzkya virginica. It was evaluated for its potential in scavenging diphenyl-picryl hydrazyl radical (DPPH•), inhibition of nitric oxide (NO) induced by lipopolysaccharide (LPS), cytotoxic activity against human acute promyelocytic leukemia (HL-60) and human colorectal adenocarcinoma (LOVO) cell lines.

http://dx.doi.org/10.5935/0103-5053.20150032

Published online: February 10, 2015

J. Braz. Chem. Soc. 2015, 26(4), 729-735

Development and Validation of a Dissolution Test Method for Albendazole and Praziquantel in Their Combined Dosage Form

Silvana E. Vignaduzzo; María A. Operto; Patricia M. Castellano

How to cite this article

 

This study aimed to develop a dissolution test for tablets containing albendazole and praziquantel for veterinary use.

http://dx.doi.org/10.5935/0103-5053.20150033

Published online: February 10, 2015
J. Braz. Chem. Soc. 2015, 26(4), 736-740

Cytotoxic Chalcones from Desmodium oxyphyllum

Xue-Mei Gao; Huan Wang; Yin-Ke Li; Bing-Kun Ji; Cong-Fang Xia; Juan-Xia Yang; Min Zhou; Yan-Qing Ye; Qiu-Fen Hu

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Three new chalcones isolated from Desmodium oxyphyllum.

http://dx.doi.org/10.5935/0103-5053.20150034

Published online: February 12, 2015

J. Braz. Chem. Soc. 2015, 26(4), 741-747

Selective Determination of 2,4,6-Trinitrotoluene in Water Samples Based on Magnetic Imprinted Nanoparticles via Grafting Polymerization

Ali Reza Zarei; Reihane Samiee Zafarghandi

How to cite this article

 

A 2,4,6-trinitrotoluene (TNT)-imprinted polymer was developed via "grafting to" procedure on the magnetic modified surface for selective determination of TNT from water media.

http://dx.doi.org/10.5935/0103-5053.20150035

Published online: February 12, 2015
J. Braz. Chem. Soc. 2015, 26(4), 748-754

Agarose-Alumina Composite Supported Palladium Catalyst for Suzuki Coupling Reactions

Peng Wang; Jin Cai; Junqing Chen; Min Ji

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The palladium catalyst supported on agarose-alumina composite and its utilization in the Suzuki reaction have been investigated.

http://dx.doi.org/10.5935/0103-5053.20150036

Published online: February 12, 2015

J. Braz. Chem. Soc. 2015, 26(4), 755-764

Molecular Sieves Mediated Green Per-O-Acetylation of Carbohydrate Templates and Lipase Catalyzed Regioselective Alcoholysis of 2,3,5-Tri-O-Acetyl-D-Ribonolactone

Herbert M. Cardozo; Thaís F. Ribeiro; Marcus M. Sá; Damianni Sebrão; Maria G. Nascimento; Gustavo P. Silveira

How to cite this article

 

13XKCl molecular sieves catalyzed the peracetylation of carbohydrates. The catalyst is stable, inexpensive, nontoxic, and can be reused for several cycles. Regioselective alcoholysis of peracetylated D-ribonolactone was catalyzed by the lipase B from Candida antarctica (CAL-B).

http://dx.doi.org/10.5935/0103-5053.20150037

Published online: February 12, 2015

J. Braz. Chem. Soc. 2015, 26(4), 765-774

Synthesis of Biphenyl Tyrosine Via Cross-Coupling Suzuki-Miyaura Reaction Using Aryltrifluoroborate Salts

Stanley N. S. Vasconcelos; Cristiane S. Barbeiro; Amna N. Khan; Hélio A. Stefani

How to cite this article

 

A method for obtaining biarylic units from tyrosine derivatives via Suzuki-Miyaura cross-coupling using a variety of potassium aryltrifluoroborate salts.

http://dx.doi.org/10.5935/0103-5053.20150038

Published online: February 12, 2015

J. Braz. Chem. Soc. 2015, 26(4), 775-783

Performance Evaluation of a Portable Laser-Induced Fluorescence Spectroscopy System for the Assessment of the Humification Degree of the Soil Organic Matter

Cleber H. dos Santos; Renan A. Romano; Gustavo Nicolodelli; Camila M. Carvalho; Paulino R. Villas-Boas; Ladislau Martin-Neto; Célia R. Montes; Adolpho J. Melfi; Débora M. B. P. Milori

How to cite this article

 

A portable laser-induced fluorescence spectroscopy (LIFS) was used to evaluate the soil organic matter without need for previous sample chemical treatment. The proposed LIFS can be used in precision agriculture.

http://dx.doi.org/10.5935/0103-5053.20150039

Published online: February 24, 2015
J. Braz. Chem. Soc. 2015, 26(4), 784-789

(1R,2S,6R)-Papayanol, Aggregation Pheromone of the Guava Weevil, Conotrachelus psidii

Angela M. Palacio-Cortés; Fabricio Valente; Emir B. Saad; Armin Tröger; Wittko Francke; Paulo H. G. Zarbin

How to cite this article

 

The (1R,2S,6R)-2-hydroxymethyl-2,6-dimethyl-3-oxabicyclo[4.2.0]octane, commonly known as papayanol, was identified as a male-specific pheromone component for the guava weevil, Conotrachelus psidii. This compound elicited aggregation behavior in adults and was released mainly during the scotophase. Observed amounts ranged up to 500 ng per insect per day.

http://dx.doi.org/10.5935/0103-5053.20150040

Published online: February 24, 2015
J. Braz. Chem. Soc. 2015, 26(4), 790-796

Kinetics and Product Analysis of the Electrochemical Dehalogenation of Hexachlorobenzene

Nohra V. Gallardo-Rivas; Javier Guzman; Silvia Gutierrez-Granados; Maria Guadalupe Garcia-Jimenez; Jorge G. Ibanez; Ulises Paramo-Garcia

How to cite this article

 

Chromatogram for the characterization of CoSalen catalyst and hexachlorobenzene in the organic medium.

http://dx.doi.org/10.5935/0103-5053.20150041

Published online: February 24, 2015
J. Braz. Chem. Soc. 2015, 26(4), 797-803

Validation of a High Performance Liquid Chromatography Method for Aflatoxins Determination in Corn Arepas

Marcela Martínez-Miranda; Gonzalo Taborda-Ocampo; Milton Rosero-Moreano

How to cite this article

 

Validation of a high performance liquid chromatography (HPLC) method for aflatoxins determination in corn arepas commercialized in Manizales, Colombia.

http://dx.doi.org/10.5935/0103-5053.20150042

Published online: February 24, 2015
J. Braz. Chem. Soc. 2015, 26(4), 804-809

Caesalpinioflavone, a New Cytotoxic Biflavonoid Isolated from Caesalpinia pluviosa var. peltophoroides

João L. B. Zanin; Murilo Massoni; Marcelo H. dos Santos; Giovana C. de Freitas; Evandro L. O. Niero; Renata R. Schefer; João H. G. Lago; Marisa Ionta; Marisi G. Soares

How to cite this article

 

Caesalpinioflavone, a novel biflavonoid isolated from Caesalpinia pluviosa var. peltophoroides, displays antitumor potential against A549, MCF7, Hs578T and HTC cell lines.

http://dx.doi.org/10.5935/0103-5053.20150043

Published online: February 24, 2015

Short Report J. Braz. Chem. Soc. 2015, 26(4), 810-815

Synthesis of Alkylseleno-Carbohydrates and Evaluation of their Antioxidant Properties

Jaqueline P. Vargas; Lucimar M. Pinto; Lucielli Savegnago; Diogo S. Lüdtke

How to cite this article

 

The synthesis of alkylseleno carbohydrates starting from different sugar scaffolds is described. The synthesized molecules had their antioxidant activity profile evaluated and promising results were found for one of the synthesized compounds.

http://dx.doi.org/10.5935/0103-5053.20150021

Published online: February 6, 2015

J. Braz. Chem. Soc. 2015, 26(4), 816-821

A New Straightforward Synthesis of 2', 3'-Didehydro-2', 3'-dideoxy-2'-(2"-(trimethylsilyl)ethylthio)thymidine, Key Intermediate for the Synthesis of 2'-Substituted Thionucleosides

Maralise P. Oliveira; Lucas L. Franco; Maria C. A. Lima; Cláudia M. O. Simões; Suely L. Galdino; Ivan R. Pitta; Jean-Luc Décout; Ricardo J. Alves

How to cite this article

 

Short and efficient synthesis of 2',3'-didehydro-2',3'-dideoxy-2'-(2''-(trimethylsilyl)ethylthio)thymidine which allows the preparation of diverse potentially antiviral and/or anticancer nucleosides.

http://dx.doi.org/10.5935/0103-5053.20150025

Published online: February 6, 2015

J. Braz. Chem. Soc. 2015, 26(4), 822-827

Collision-Induced Dissociation Analysis of Brevianamide A and C in Electrospray Ionization Mass Spectrometry

Ana Lígia L. de Oliveira; Ricardo Vessecchi; Norberto P. Lopes; Hosana M. Debonsi

How to cite this article

 

Computational chemistry and collision-induced dissociation analysis of brevianamide A and C allow discrimination between isomeric cyclic peptides isolated from Penicillium brevicompactum and sheds light on diketopiperazine fragmentation mechanisms.

http://dx.doi.org/10.5935/0103-5053.20150029

Published online: February 6, 2015
Additions and Corrections J. Braz. Chem. Soc. 2015, 26(4), 828

Validation of the Determination of Fatty Acids in Milk by Gas Chromatography

Julliana Isabelle Simionato; Juliana Carla Garcia; Geraldo Tadeu dos Santos; Cláudio Celestino Oliveira; Jesui Vergilio Visentainer; Nilson Evelázio de Souza

How to cite this article

 

http://dx.doi.org/10.5935/0103-5053.20150063

Published online: March 17, 2015
J. Braz. Chem. Soc. 2015, 26(4), 829

Quantification of Harman Alkaloids in Sour Passion Fruit Pulp and Seeds by a Novel Dual SBSE-LC/Flu (Stir Bar Sorptive Extraction - Liquid Chromatography with Fluorescence Detector) Method

Cíntia A. M. Pereira; Thyago R. Rodrigues; Janete H. Yariwake

How to cite this article

 

http://dx.doi.org/10.5935/0103-5053.20150064

Published online: March 17, 2015

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