JBCS

13:56, Fri May 26

Open Access/APCs

vol. 28, No. 5, 2017, p. 695-926

 

In this paper we describe synthetic strategies for improving the colloidal properties of platinum drug-functionalized superparamagnetic iron oxide nanoparticles (SPIONS). Protecting the surface of SPIONS with citric acid and further functionalization with Pt2+ complexes modified dextran is an excellent tactic to obtain stable magnetic nanoparticles under physiological conditions. Details are presented in the Article Studies of the Colloidal Properties of Superparamagnetic Iron Oxide Nanoparticles Functionalized with Platinum Complexes in Aqueous and PBS Buffer Media by Gustavo B. da Silva, Marzia Marciello, María del Puerto Morales, Carlos J. Serna, Maria D. Vargas, Célia M. Ronconi and Rocío Costo on page 731.


Cover Article
J. Braz. Chem. Soc. 2017, 28(5), 731-739

Studies of the Colloidal Properties of Superparamagnetic Iron Oxide Nanoparticles Functionalized with Platinum Complexes in Aqueous and PBS Buffer Media

Gustavo B. da Silva; Marzia Marciello; María del Puerto Morales; Carlos J. Serna; Maria D. Vargas; Célia M. Ronconi; Rocío Costo

How to cite this article

In this paper we describe synthetic strategies for improving the colloidal properties of platinum drug-functionalized superparamagnetic iron oxide nanoparticles (SPIONS). Protecting the surface of SPIONS with citric acid and further functionalization with Pt2+ complexes modified dextran is an excellent tactic to obtain stable magnetic nanoparticles under physiological conditions. Details are presented in the Article Studies of the Colloidal Properties of Superparamagnetic Iron Oxide Nanoparticles Functionalized with Platinum Complexes in Aqueous and PBS Buffer Media by Gustavo B. da Silva, Marzia Marciello, María del Puerto Morales, Carlos J. Serna, Maria D. Vargas, Célia M. Ronconi and Rocío Costo on page 731.

http://dx.doi.org/10.21577/0103-5053.20160221

Published online: August 1, 2016

Articles J. Braz. Chem. Soc. 2017, 28(5), 695-706

NIR Monitoring and Modelling of Soybean Oil Methanolysis with Multivariate Curve Resolution-Alternating Least Squares with Correlation Constraint

Rafaella F. Sales; Suzana M. de Lima; Luiz Stragevitch; Maria Fernanda Pimentel; Anna de Juan

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NIR monitoring of transesterification reactions and application of MCR-ALS with correlation constraint to estimate methyl ester concentration profiles.

http://dx.doi.org/10.21577/0103-5053.20160218

Published online: July 22, 2016

J. Braz. Chem. Soc. 2017, 28(5), 707-723

Chemical Constituents of Psychotria nemorosa Gardner and Antinociceptive Activity

Nivea O. Calixto; Millena S. Cordeiro; Thais B. S. Giorno; Gibson G. Oliveira; Norberto P. Lopes; Patricia D. Fernandes; Angelo C. Pinto; Claudia M. Rezende

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This is the first phytochemical sudy of Psychotria nemorosa Gardner leaves (Rubiaceae) established in a metabolomic perspective by GC-MS and LC-MS, besides its antinociceptive activity.

This paper is part of the PubliSBQ Special Issue in honor of the late Prof Angelo da Cunha Pinto.

http://dx.doi.org/10.21577/0103-5053.20160219

Published online: July 25, 2016


J. Braz. Chem. Soc. 2017, 28(5), 724-730

Cationic Micellar Precipitation for Simultaneous Preconcentration of Benzimidazole Anthelmintics in Milk Samples by High-Performance Liquid Chromatography

Jitlada Vichapong; Yanawath Santaladchaiyakit; Supalax Srijaranai; Rodjana Burakham

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Micellar precipitation process was investigated. This method provides high efficacy for extraction of benzimidazoles analysis.

http://dx.doi.org/10.21577/0103-5053.20160220

Published online: July 29, 2016

J. Braz. Chem. Soc. 2017, 28(5), 731-739

Studies of the Colloidal Properties of Superparamagnetic Iron Oxide Nanoparticles Functionalized with Platinum Complexes in Aqueous and PBS Buffer Media

Gustavo B. da Silva; Marzia Marciello; María del Puerto Morales; Carlos J. Serna; Maria D. Vargas; Célia M. Ronconi; Rocío Costo

How to cite this article

 

Novel dextran-coated SPIONs functionalized with platinum complexes afford high colloidal stability in aqueous and PBS buffer media.

http://dx.doi.org/10.21577/0103-5053.20160221

Published online: August 1, 2016


J. Braz. Chem. Soc. 2017, 28(5), 740-746

Exploratory Analysis of Biodiesel by Combining Comprehensive Two-Dimensional Gas Chromatography and Multiway Principal Component Analysis

Noroska G. S. Mogollón; Fabiana A. L. Ribeiro; Ronei J. Poppi; Araceli L. Quintana; Juan A. G. Chávez; Darwin A. P. Agualongo; Helga G. Aleme; Fabio Augusto

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The synthesis of biodiesel requires analysis with high resolution and detectability for determining the biodiesel raw material.

http://dx.doi.org/10.21577/0103-5053.20160222

Published online: August 2, 2016

J. Braz. Chem. Soc. 2017, 28(5), 747-755

The Use of the Liquid from Cashew Nut Shells as an Antioxidant in Biodiesel

Flavio A. Bastos; Matthieu Tubino

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Cashew nutshell liquid (CNSL) can be used as antioxidant in biodiesel increasing its oxidative stability, even when added in 0.1% m/m or in lower concentration.

http://dx.doi.org/10.21577/0103-5053.20160223

Published online: August 2, 2016

J. Braz. Chem. Soc. 2017, 28(5), 756-767

Synthesis, Characterization and Antimicrobial Activities of Copper, Nickel, Cobalt, Chromium Complexes Derived from (Z)-4-Fluoro-N-(2,7-dimethylhept-6-enylidene) benzenamine

Sridhar.G; Mohammed Bilal.I; Easwaramoorthy.D; Kutti Rani.S; Siva Kumar.B; Chelli Sai Manohar

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We obtained novel binuclear chromium(III)-ligand bridging complex. The docking study of the Schiff base ligand illustrates the binding interactions with PAF protein.

http://dx.doi.org/10.21577/0103-5053.20160224

Published online: August 2, 2016

J. Braz. Chem. Soc. 2017, 28(5), 768-774

Synthesis and Characterization of a New Unsymmetrical Potentially Pentadentate Schiff Base Ligand and Related Complexes with Manganese(II), Nickel(II), Copper(II), Zinc(II) and Cadmium(II)

Ahmad Ali Dehghani-Firouzabadi; Sakineh Firouzmandi

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New unsymmetric thioether Schiff base amine, unsymmetric Schiff base ligand (L) and related complexes of this ligand were prepared and characterized by the appropriate spectroscopic methods.

http://dx.doi.org/10.21577/0103-5053.20160226

Published online: August 3, 2016


J. Braz. Chem. Soc. 2017, 28(5), 775-781

Comparison Between Three Chromatographic (GC-ECD, GC-PFPD and GC‑ITD‑MS) Methods and a UV-Vis Spectrophotometric Method for the Determination of Dithiocarbamates in Lettuce

Ionara R. Pizzutti; André de Kok; Rosselei C. da Silva; Graciele N. Rohers

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Lettuce is an important crop consumed in Brazil and dithiocarbamates are the most frequently fungicides detected in Brazilian monitoring programs. Due to this, it is necessary analytical methods with high quality in order to determine dithiocarbamates residues in lettuce.

http://dx.doi.org/10.21577/0103-5053.20160227

Published online: August 4, 2016

J. Braz. Chem. Soc. 2017, 28(5), 782-789

Three New Steroidal Glycoalkaloids from Solanum pseudoquina A. St.-Hil. (Solanaceae)

Vitor Soares; Thaís A. Bezerra; Rita C. A. Lafetá; Ricardo M. Borges; Antonio Jorge R. da Silva

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Rotating frame nuclear Overhauser effect spectroscopy (ROESY) correlations were used in the elucidation of the overall stereochemistry of the three alkaloids obtained from S. pseudoquina A. St.-Hil.

http://dx.doi.org/10.21577/0103-5053.20160229

Published online: August 9, 2016


J. Braz. Chem. Soc. 2017, 28(5), 790-799

Impact of HNO3 Solution Treatment of South Brazil Coal Matrices on Their Chemical Composition and Humic Acids Yield

Deborah P. Dick; Janaina B. da Costa; Anderson José B. Leite; Eduardo A. Brocchi

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This study demonstrated that the nitration of coal tailings to increase humic acids yield is a promising alternative for a sustainable fate of these residues.

http://dx.doi.org/10.21577/0103-5053.20160230

Published online: August 9, 2016

J. Braz. Chem. Soc. 2017, 28(5), 800-807

Biodiesel Wastewater Treatment by Coagulation-Flocculation: Evaluation and Optimization of Operational Parameters

Bárbara R. Gonçalves; Waldomiro Borges Neto; Antonio E. H. Machado; Alam G. Trovó

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A coagulation-flocculation process was evaluated as alternative for treatment of biodiesel wastewater, being obtained efficiencies between 82 and 99% for removal of apparent color, oils and fats, turbidity and suspended solids.

http://dx.doi.org/10.21577/0103-5053.20160231

Published online: August 9, 2016


J. Braz. Chem. Soc. 2017, 28(5), 808-818

Low Potential and Non-Enzymatic Hydrogen Peroxide Sensor Based on Copper Oxide Nanoparticle on Activated Pencil Graphite Electrode

Mohammad Ali Kamyabi; Nasim Hajari

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Chemically activated pencil graphite electrode modified with CuO nanocubes presented as electrochemical H2O2 sensor. The presented sensor has excellent electrocatalytic activity toward H2O2 oxidation (dramatically decrease in H2O2 oxidation overpotential, at about +0.05 V vs. Ag/AgCl).

http://dx.doi.org/10.21577/0103-5053.20160232

Published online: August 12, 2016


J. Braz. Chem. Soc. 2017, 28(5), 819-830

Identification of Alkaloids from Hippeastrum aulicum (Ker Gawl.) Herb. (Amaryllidaceae) Using CGC-MS and Ambient Ionization Mass Spectrometry (PS‑MS and LS-MS)

Carliani D. P. B. Bessa; Jean P. de Andrade; Renata S. de Oliveira; Eloilson Domingos; Heloa Santos; Wanderson Romão; Jaume Bastida; Warley S. Borges

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Typical Amaryllidaceae alkaloids have been identified from Hippeastrum aulicum by means of capillary gas chromatography-mass spectrometry (CGC-MS). Leaf and paper spray mass spectrometry were carried out and the results obtained were in agreement with CGC-MS data. NMR data for the new compound haemanthamine N-oxide are also reported.

http://dx.doi.org/10.21577/0103-5053.20160234

Published online: August 12, 2016


J. Braz. Chem. Soc. 2017, 28(5), 831-837

Fast Sample Preparation Method Using Ultra-High Performance Liquid Chromatography Coupled to Tandem Mass Spectrometry for Natamycin Determination in Wine Samples

Gabrieli Bernardi; Tiele M. Rizzetti; Martha B. Adaime; Renato Zanella; Osmar D. Prestes

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In this work a fast and efficient method was optimized by central composite design, validated and applied for natamycin residues determination in wine samples by UHPLC-MS/MS.

http://dx.doi.org/10.21577/0103-5053.20160235

Published online: August 15, 2016


J. Braz. Chem. Soc. 2017, 28(5), 838-847

Comparison of ICP OES and LIBS Analysis of Medicinal Herbs Rich in Flavonoids from Eastern Europe

Daniel F. Andrade; Edenir Rodrigues Pereira-Filho; Pawel Konieczynski

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Spectroanalytical analysis of tea samples using ICP OES (infusion and mineralization) and direct Ca, K and Mg determination using LIBS

http://dx.doi.org/10.21577/0103-5053.20160236

Published online: August 16, 2016

J. Braz. Chem. Soc. 2017, 28(5), 848-857

Characterization of Acidic Compounds in Brazilian Tar Sand Bitumens by LTQ Orbitrap XL: Assessing Biodegradation Using Petroleomics

Laercio L. Martins; Célio Fernando F. Angolini; Georgiana F. da Cruz; Anita J. Marsaioli

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The acidic fraction of tar sand bitumens from Pirambóia Formation, Paraná Basin, were analyzed by negative-ion ESI LTQ Orbitrap XL. The distribution of heteroatom classes determined by the obtained mass spectra was used to assess biodegradation.

http://dx.doi.org/10.21577/0103-5053.20160237

Published online: August 16, 2016

J. Braz. Chem. Soc. 2017, 28(5), 858-867

PCDD/Fs and PCBs in Soils: a Study of Case in the City of Belo Horizonte‑MG

Igor C. Pussente; Guillaume ten Dam; Stefan van Leeuwen; Rodinei Augusti

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Levels of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) were investigated in soils from Belo Horizonte-MG.

http://dx.doi.org/10.21577/0103-5053.20160238

Published online: August 18, 2016


J. Braz. Chem. Soc. 2017, 28(5), 868-877

Development and Validation of Ultrasound Assisted and Dispersive Liquid-Liquid Microextractions Combined with HPLC-UV Method for Determination of Bosentan in Human Plasma and Urine

Sanaz Sajedi-Amin; Karim Asadpour-Zeynali; Maryam Khoubnasabjafari; Farid Rashidi; Abolghasem Jouyban

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Liquid-liquid microextraction methods (DLLME and USAEME) combined with LC-UV for determination of bosentan in biological samples.

http://dx.doi.org/10.21577/0103-5053.20160239

Published online: August 18, 2016

J. Braz. Chem. Soc. 2017, 28(5), 878-886

Evaluation of QuEChERS Sample Preparation for Determination of Avermectins Residues in Ovine Muscle by HPLC-FD and UHPLC-MS/MS

Nelson M. G. Bandeira; Lucila C. Ribeiro; Tiele M. Rizzetti; Manoel L. Martins; Martha B. Adaime; Renato Zanella; Osmar D. Prestes

How to cite this article

 

The concern about the presence of veterinary drugs residues in food of animal origin has prompted the search for alternative methods able to detect low levels of these compounds in a simple and efficient way. Thus, in this work a QuEChERS method was successfully modified and validated for avermectins residues determination in ovine muscle samples by HPLC-FD and UHPLC-MS/MS.

http://dx.doi.org/10.21577/0103-5053.20160240

Published online: August 19, 2016

J. Braz. Chem. Soc. 2017, 28(5), 887-894

Determination of Traces of Ni, Cu, and Zn in Wastewater and Alloy Samples by Flame-AAS after Ionic Liquid-Based Dispersive Liquid Phase Microextraction

Vahid Zare-Shahabadi; Parisa Asaadi; Fatemeh Abbasitabar; Abbas Shirmardi

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To the sample solution, appropriate amounts of DDTC (complexing agent) and NaPF6 were added. After standing for 2 min, 0.5 mL methanol containing 0.13 IL was injected rapidly. After centrifuging, extraction phase was mixed with 500 µL methanol prior to the flame-AAS analysis.

http://dx.doi.org/10.21577/0103-5053.20160241

Published online: August 22, 2016

J. Braz. Chem. Soc. 2017, 28(5), 895-906

Docking and QM/MM Studies of NS2B-NS3pro Inhibitors: a Molecular Target against the Dengue Virus

Isabella P. Godói; William Gustavo Lima; Moacyr Comar Junior; Ricardo José Alves; Jaqueline Maria S. Ferreira; De-Xin Kong; Alex G. Taranto

How to cite this article

 

Peptidomimetics were considered as inhibitor candidates for NS2B-NS3pro DENV-2. Molecular docking and QM/MM calculations were used to evaluate these various compounds. Ligand Bz-Nle-m(Am)Phe-m(Im)Phe-(dMo)Phe-H was found to be the best inhibitor candidate for this molecular template. These findings may motivate additional virtual screening based on the pharmacophoric hypothesis to characterize lead compounds for therapies targeted against DENV.

http://dx.doi.org/10.21577/0103-5053.20160242

Published online: August 22, 2016


J. Braz. Chem. Soc. 2017, 28(5), 907-912

Intraspecific Variation of the Volatile Chemical Composition of Myracrodruon urundeuva Fr. Allem. ("Aroeira-do-Sertão"): Characterization of Six Chemotypes

Nayara Coriolano de Aquino; Renata Mendonça Araújo; Edilberto Rocha Silveira

How to cite this article

 

GC-MS and NMR analyzes of the essential oil from leaves of 62 individual specimens of Myracrodruon urundeuva ("aroeira-do-sertão") permitted to identify six different chemotypes characterized by the major constituents: myrcene, α-pinene, limonene, Δ3-carene, and (Z) and (E)-β-ocimene.

http://dx.doi.org/10.21577/0103-5053.20160243

Published online: August 24, 2016


Short Report J. Braz. Chem. Soc. 2017, 28(5), 913-919

Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity

Rafael S. Porto; Susanne Rath; Sonia C. N. Queiroz

How to cite this article

 

Compounds obtained from the plant Conyza canadensis through pressurized hot water extraction presented antifungal activity.

http://dx.doi.org/10.21577/0103-5053.20160228

Published online: August 8, 2016


J. Braz. Chem. Soc. 2017, 28(5), 920-926

The Use of Near Infrared Spectroscopy and Multivariate Calibration for Determining the Active Principle of Olanzapine in a Pharmaceutical Formulation

Marcelo V. P. Amorim; Fernanda S. L. Costa; Cícero F. S. Aragão; Kássio M. G. Lima

How to cite this article

 

Active principle of olanzapine in different pharmaceutical excipients using near infrared spectroscopy (NIRS) and multivariate calibration was developed.

http://dx.doi.org/10.21577/0103-5053.20160233

Published online: August 12, 2016

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