JBCS

6:20, Fri May 26

Open Access/APCs

vol. 23, No. 5, 2012, p. 796-983

 

The Future We Want

The title of this editorial is the same given to the main document to be discussed, two months from now, at the Earth Summit 2012, the so-called Rio+20, in allusion to the 20th anniversary of the United Nations Conference on Environment and Development, also known as RIO-92. The 1992 Summit, with its 27 principles, has been the most influential one because, beyond the environment itself, it placed human beings as the focus for the sustainable development, bringing, thus, for the discussion, issues such as hunger, diseases, disarmament, racial prejudice and genocide.

(Read more at Editorial)


Cover Article
J. Braz. Chem. Soc. 2012, 23(5), 913-920

Structure and peroxidase activity of ferric Streptomyces clavuligerus orf10-encoded protein P450CLA: UV-visible, CD, MCD and EPR spectroscopic characterization

Leandro S. Goto; Carlos O. Hokka; José F. Lima; Tatiana Prieto; Ana Paula U. Araújo; Iseli L. Nantes; Otaciro R. Nascimento

How to cite this article

Soret bands of two states of recombinant orf10-encoded P450-camphor like protein (P450CLA) of Streptomyces clavuligerus expressed in Escherichia coli Rosetta: the resting form (light gray) and the finger print of this hemeprotein characterized by Soret band peaking at 450 nm for the ferrous-CO complex (pink). Cytochrome P450 CLA is involved in the clavulanic acid biosynthetic pathway (color structure at right side) able to inhibit β-lactamase of penicillin-resistant bacteria. See details in the Article Structure and Peroxidase Activity of Ferric Streptomyces clavuligerus orf10-encoded Protein P450CLA: UV-Visible, CD, MCD and EPR Spectroscopic Characterization by Goto et al. on page 913

http://dx.doi.org/10.1590/S0103-50532012000500017

Published online: April 19, 2012

Editorial J. Braz. Chem. Soc. 2012, 23(5), 796-795

The future we want

Vitor F. Ferreira

How to cite this article

 

http://dx.doi.org/10.1590/S0103-50532012000500001


Articles J. Braz. Chem. Soc. 2012, 23(5), 797-803

Interference standard applied to sulfur determination in biodiesel microemulsions by ICP-QMS

Renata S. Amais; George L. Donati; Joaquim A. Nóbrega

How to cite this article

 

Soret bands of two states of recombinant orf10-encoded P450-camphor like protein (P450CLA) of Streptomyces clavuligerus expressed in Escherichia coli Rosetta: the resting form (light gray) and the finger print of this hemeprotein characterized by Soret band peaking at 450 nm for the ferrous-CO complex (pink). Cytochrome P450 CLA is involved in the clavulanic acid biosynthetic pathway (color structure at right side) able to inhibit β-lactamase of penicillin-resistant bacteria. See details in the Article Structure and Peroxidase Activity of Ferric Streptomyces clavuligerus orf10-encoded Protein P450CLA: UV-Visible, CD, MCD and EPR Spectroscopic Characterization by Goto et al. on page 913

http://dx.doi.org/10.1590/S0103-50532012000500002

Published online: March 20, 2012

J. Braz. Chem. Soc. 2012, 23(5), 804-809

Dialkylphosphorylhydrazones as potent tyrosinase inhibitors

Janaína M. R. Caixeiro; Vinicius T. Gonçalves; Márcia C. C. de Oliveira; Carlos M. R. Sant'Anna; Victor M. Rumjanek; João B. N. Da Costa

How to cite this article

 

The inhibition of the enzyme tyrosinase by some new organophosphorus compounds was investigated with the aim of developing potential drugs useful for the treatment of various skin disorders. Some compounds were found to be more active than the commercial ascorbic acid

http://dx.doi.org/10.1590/S0103-50532012000500003

Published online: March 22, 2012

J. Braz. Chem. Soc. 2012, 23(5), 810-817

Effect of calcium phosphate coating on polyamide substrate for biomaterial applications

Lucimara C. Bandeira; Kßtia J. Ciuffi; Paulo S. Calefi; Eduardo J. Nassar; Jorge V. L. Silva; Marcelo Oliveira; Izaque A. Maia; Isabel M. Salvado; Maria Helena V. Fernandes

How to cite this article

 

Sol-gel process used to prepare calcium coating as bioactive materials

http://dx.doi.org/10.1590/S0103-50532012000500004

Published online: March 27, 2012

J. Braz. Chem. Soc. 2012, 23(5), 818-824

Molecular identification and phylogenetic analysis of Egletes viscosa (L.) Less., a traditional medicinal plant from northeastern Brazil

José M. M. Batista; Davi C. Torres; Daniel M. de M. Jorge; Carlos E. A. Soares; Walderly M. Bezerra; Edilberto R. Silveira; Thalles B. Grangeiro

How to cite this article

 

There are two chemotypes of "macela" (Egletes viscosa (L.) Less.), whose essential oils are characterized by the presence of trans-pinocarveyl acetate (chemotype A) or cis-isopinocarveyl acetate (chemotype B). Analysis of ITS/5.8S DNA sequences provides an effective and accurate strategy for identifying the chemotypes from E. viscosa

http://dx.doi.org/10.1590/S0103-50532012000500005

Published online: March 29, 2012


J. Braz. Chem. Soc. 2012, 23(5), 825-830

Knoevenagel condensation of aromatic aldehydes with ethyl 4‑chloro‑3‑oxobutanoate in ionic liquids

Bruno R. S. de Paula; Dávila S. Zampieri; Julio Zukerman-Schpector; Edward R. T. Tiekink; José Augusto R. Rodrigues; Paulo J. S. Moran

How to cite this article

 

Knoevenagel condensations of aromatic aldehydes with ethyl 4-chloro-3-oxobutanoate were carried out in ionic liquids to give ethyl (E)/(Z)-2-chloroacetyl-3-arylpropenoates. The ionic liquid [bmim(NTf2)] was reused up to 4 times without loss in product yields, and an unequivocal methodology of (E)/(Z)-structural analysis by 13C NMR (nuclear magnetic resonance) is presented

http://dx.doi.org/10.1590/S0103-50532012000500006

Published online: March 29, 2012


J. Braz. Chem. Soc. 2012, 23(5), 831-837

Electrooxidation of ethanol on Pt and PtRu surfaces investigated by ATR surface-enhanced infrared absorption spectroscopy

Márcio F. Silva; Bruno C. Batista; Emerson Boscheto; Hamilton Varela; Giuseppe A. Camara

How to cite this article

 

ATR-SEIRAS experiments performed on Pt and PtRu electrodeposits show that CO is formed at low potentials (~ 0.1 V) on both surfaces and remains adsorbed, blocking surface sites and thus inhibiting ethanol oxidation. Kinetic modeling suggests that CO adsorbed layer is not influenced by the presence of Ru, whilst its oxidation is clearly favored in the presence of this metal

http://dx.doi.org/10.1590/S0103-50532012000500007

Published online: April 3, 2012

J. Braz. Chem. Soc. 2012, 23(5), 838-845

Evaluation of metal ions in rice samples: extraction and direct determination by ICP OES

Andrea Oliveira; Nivaldo Baccan; Solange Cadore

How to cite this article

 

The extraction of metal ions present in rice samples with ammoniacal solution of EDTA (pH 10) as extracting agent allowed the determination of P, K, Mg, Ca, Zn, Mn, Cu and Mo in rice samples of type "integral", "agulhinha" and "parboiled"

http://dx.doi.org/10.1590/S0103-50532012000500008

Published online: April 3, 2012

J. Braz. Chem. Soc. 2012, 23(5), 846-853

Assessment of Inorganic Contaminants in Golden Mussel (Limnoperna fortunei) in Southern Brazil

Éderson R. Pereira; Bruno M. Soares; João P. Vieira; Ana C. G. Mai; Rochele S. Picoloto; Edson I. Muller; Erico M. M. Flores; Fábio A. Duarte

How to cite this article

 

Bivalves have been widely used as sentinel organisms for environmental monitoring of trace and major element concentration in aquatic ecosystems. The simultaneous characterization of this biomarker in different locations can provide information on the pollution status in the region

http://dx.doi.org/10.1590/S0103-50532012000500009

Published online: April 3, 2012


J. Braz. Chem. Soc. 2012, 23(5), 854-860

Synthesis, Urease Inhibition, Antioxidant and Antibacterial Studies of Some 4-Amino-5-aryl-3H-1,2,4-triazole-3-thiones and their 3,6-Disubstituted 1,2,4-Triazolo[3,4-b]1,3,4-thiadiazole Derivatives

Muhammad Hanif; Muhammad Saleem; Muhammad Tahir Hussain; Nasim Hasan Rama; Sumera Zaib; Muhammad Adil M. Aslam; Peter G. Jones; Jamshed Iqbal

How to cite this article

 

A new series of 4-amino-5-aryl-3H-1,2,4-triazole-3-thiones was condensed with different substituted aromatic acids to yield 3,6-disubstituted-1,2,4-triazolo[3,4-b]1,3,4-thiadiazoles. The synthesized compounds were screened for their urease inhibition, antioxidant and antibacterial activities. Some compounds showed excellent urease inhibition activities more than the standard drug

http://dx.doi.org/10.1590/S0103-50532012000500010

Published online: April 10, 2012


J. Braz. Chem. Soc. 2012, 23(5), 861-867

Estimating cocaine consumption in the Brazilian Federal District (FD) by sewage analysis

Adriano O. Maldaner; Luciana L. Schmidt; Marco A. F. Locatelli; Wilson F. Jardim; Fernando F. Sodré; Fernanda V. Almeida; Carlos Eduardo B. Pereira; Cristiano M. Silva

How to cite this article

 

The consumption of cocaine in the Brazilian Federal District, via sewage analysis, was estimated in 1.0 ton year-1. Sampling at different wastewater treatment plants allowed the detection of areas with higher consumption

http://dx.doi.org/10.1590/S0103-50532012000500011

Published online: April 10, 2012


J. Braz. Chem. Soc. 2012, 23(5), 868-879

Support effect on carbon nanotube growth by methane chemical vapor deposition on cobalt catalysts

Hugo A. Oliveira; Dante F. Franceschini; Fabio B. Passos

How to cite this article

 

The support influences the activity and selectivity of cobalt catalysts on carbon nanotube production. Co/Al2O3 showed the highest total carbon yield and the Co/TiO2 showed the highest selectivity (80%) towards single walled carbon nanotube formation

http://dx.doi.org/10.1590/S0103-50532012000500012

Published online: April 10, 2012

J. Braz. Chem. Soc. 2012, 23(5), 881-888

Synthesis and thermal behavior of new liquid crystals arylaldoxime esters

Aline Tavares; Bárbara C. Arruda; Elvis S. Boes; Valter Stefani; Hubert K. Stassen; Leandra F. Campo; Ivan H. Bechtold; Aloir A. Merlo

How to cite this article

 

The synthesis of a series of unstable fluorescent liquid-crystalline arylaldoxime esters 6a-d and 8 is reported. The chemical stability and liquid-crystalline as well as the photophysical properties of the title compounds are described and showed to be dependent on the heating/cooling cycles

http://dx.doi.org/10.1590/S0103-50532012000500013

Published online: April 17, 2012


J. Braz. Chem. Soc. 2012, 23(5), 889-893

Fatty acid synthase inhibitors isolated from Punica granatum L.

He-Zhong Jiang; Qing-Yun Ma; Hui-Jin Fan; Wen-Juan Liang; Sheng-Zhuo Huang; Hao-Fu Dai; Peng-Cheng Wang; Xiao-Feng Ma; You-Xing Zhao

How to cite this article

 

Bioassay-guided chemical investigation on the EtOH extract of the peels of Punica granatum led to the isolation of 17 compounds including one new oleanane-type triterpene named punicaone. Flavogallonic acid exhibited the strong fatty acid synthase (FAS) inhibitory activity with IC50 10.3 µmol -1

http://dx.doi.org/10.1590/S0103-50532012000500014

Published online: April 17, 2012


J. Braz. Chem. Soc. 2012, 23(5), 894-904

Correlation between electrochemical and theoretical studies on the leishmanicidal activity of twelve Morita-Baylis-Hillman adducts

Yen G. de Paiva; Antônio A. de Souza; Claudio G. Lima-Junior; Fábio P. L. Silva; Edilson B. A. Filho; Camila C. de Vasconcelos; Fabiane C. de Abreu; Marília O. F. Goulart; Mário L. A. A. Vasconcellos

How to cite this article

 

This work presents electrochemical studies, in aprotic media, of twelve Morita-Baylis-Hillman adducts (MBHA) with significant leishmanicidal activity, together with conformational calculations. Ortho adducts present facilitated reduction in comparison to the other isomers and higher leishmanicidal activity. Molecular hardness (N) and atomic charges (QN) values corroborate the obtained experimental data

http://dx.doi.org/10.1590/S0103-50532012000500015

Published online: April 17, 2012


J. Braz. Chem. Soc. 2012, 23(5), 905-912

Studies on the chemical behavior of 3-(nitroacetyl)-1-ethyl-4-hydroxyquinolin-2(1H)-one towards some electrophilic and nucleophilic reagents

Magdy A. Ibrahim; Hany M. Hassanin; Yassin A. Gabr; Youssef A. Alnamer

How to cite this article

 

A variety of heterocyclic systems linked 1-ethylquinolin-2(1H)-one, were prepared from reaction of 3-(nitroacetyl)-1-ethyl-4-hydroxyquinolin-2(1H)-one with some electrophilic and nucleophilic reagents

http://dx.doi.org/10.1590/S0103-50532012000500016

Published online: April 17, 2012


J. Braz. Chem. Soc. 2012, 23(5), 913-920

Structure and peroxidase activity of ferric Streptomyces clavuligerus orf10-encoded protein P450CLA: UV-visible, CD, MCD and EPR spectroscopic characterization

Leandro S. Goto; Carlos O. Hokka; José F. Lima; Tatiana Prieto; Ana Paula U. Araújo; Iseli L. Nantes; Otaciro R. Nascimento

How to cite this article

 

The ferrous recombinant orf10-encoded P450-camphor like protein (the P450CLA) of Streptomyces clavuligerus exhibits the fingerprint red shift to 450 nm after complexation with CO and peroxidase activity towards tert-butylhydroperoxide

http://dx.doi.org/10.1590/S0103-50532012000500017

Published online: April 19, 2012


J. Braz. Chem. Soc. 2012, 23(5), 921-930

Size-segregated particulate matter and carboxylic acids over urban and rural sites in Londrina City, Brazil

Adriana de M. Freitas; Leila D. Martins; Maria Cristina Solci

How to cite this article

 

The results indicated that primary sources of vehicular emissions were the dominant source of carboxylic acids in urban and rural PM2,5 in Londrina City. Moreover, backward trajectories indicated transport of pollutants from São Paulo to Londrina

http://dx.doi.org/10.1590/S0103-50532012000500018

Published online: April 19, 2012


J. Braz. Chem. Soc. 2012, 23(5), 931-937

Reactivity of glycerol/acetone ketal (solketal) and glycerol/formaldehyde acetals toward acid-catalyzed hydrolysis

Leonardo P. Ozorio; Rafael Pianzolli; Maria Beatriz S. Mota; Claudio J. A. Mota

How to cite this article

 

The acid-catalyzed hydrolysis of the glycerol/acetone ketal (solketal) and glycerol/ formaldehyde indicated that solketal was significantly more reactive than glycerol/ formaldehyde acetals. DFT calculations of the ketal and acetal isomers explain the experimental distribution

http://dx.doi.org/10.1590/S0103-50532012000500019

Published online: April 19, 2012

J. Braz. Chem. Soc. 2012, 23(5), 938-943

Determination of tetracycline in environmental water samples at a graphite-polyurethane composite electrode

Carolina M. F. Calixto; Priscila Cervini; Éder T. G. Cavalheiro

How to cite this article

 

In the present work, a graphite-polyurethane composite electrode was used for the determination of tetracycline, an antibiotic widely used in animal and human antibacterial treatment. Once in environmental waters, tetracycline can be a potential pollutant from veterinary/medical use as well as in pharmaceutical industry wastes

http://dx.doi.org/10.1590/S0103-50532012000500020

Published online: April 19, 2012

J. Braz. Chem. Soc. 2012, 23(5), 944-950

Speciation of Fe(II) and Fe(III) by using dispersive liquid-liquid microextraction and flame atomic absorption spectrometry

Soleiman Bahar; Razieh Zakerian

How to cite this article

 

The figure shows the efficiency of dispersive liquid-liquid microextraction method for the extraction of iron ion with oxine ligand using different extraction (CH3Cl, CCl4, CH2Cl2 and CS2) and dispersive (methanol, ethanol, acetone, acetonitrile and THF) solvents

http://dx.doi.org/10.1590/S0103-50532012000500021

Published online: April 19, 2012

J. Braz. Chem. Soc. 2012, 23(5), 951-957

Effect of fluorination treatment on electrochemical properties of M1Ni3.5 Co0.6 Mn0.4 Al0.5 hydrogen storage alloy

Hongxia Huang; Kelong Huang

How to cite this article

 

Fluorination treatment improves the discharge capacity and cycle durability of M1Ni3.5 Co0.6 Mn0.4 Al0.5 alloy, which is attributed to a relatively lower cell volume changes during hydriding/dehydriding. Moreover, the electrochemical reaction resistance of the alloy electrode decreases after the treatment

http://dx.doi.org/10.1590/S0103-50532012000500022

Published online: April 24, 2012

J. Braz. Chem. Soc. 2012, 23(5), 958-965

Multivariate treatment of LIBS data of prehistoric paintings

Flávia de S. L. Borba; Juliana Cortez; Viviane K. Asfora; Celio Pasquini; Maria Fernanda Pimentel; Anne-Marie Pessis and Helen J. Khoury

How to cite this article

 

Prehistoric painting samples from Toca da Extrema II Archaeological Site (Piauí State, Brazil) and Xique-Xique Archaeological Site (Rio Grande do Norte State, Brazil). Score plot of PCA carried on the LIBS (laser-induced breakdown spectroscopy) spectra set of Toca da Extrema II Archaeological Site painting

http://dx.doi.org/10.1590/S0103-50532012000500023

Published online: April 24, 2012


Short Reports J. Braz. Chem. Soc. 2012, 23(5), 966-969

O-iodoxybenzoic acid in water: optimized green alternative for multicomponent one-pot synthesis of 2-amino-3,5-dicarbonitrile-6-thiopyridines

Santosh Takale; Jaidas Patil; Vikas Padalkar; Rajaram Pisal; Atul Chaskar

How to cite this article

 

Environmentally benign and eco-friendly protocol has been developed for the synthesis of 2-amino-3,5-dicarbonitrile-6-thio-pyridine from aldehyde, malononitrile and thiophenol

http://dx.doi.org/10.1590/S0103-50532012000500024

Published online: March 27, 2012


J. Braz. Chem. Soc. 2012, 23(5), 970-976

Determination of phenol and o-cresol in soil extracts by flow injection analysis with spectrophotometric detection

Rafael G. Dolatto; Iara Messerschmidt; Betânia F. Pereira; Carlos A. P. Silveira; Gilberto Abate

How to cite this article

 

The official spectrophotometric method (APHA) for quantification of total phenol in water was adapted to flow injection analysis (FIA) for phenol and o-cresol determinations in soil extracts. As shown in the figure, a good agreement between the results was verified in a recovery study, with similar limit of quantification and sampling rate, near 50 analyses per h

http://dx.doi.org/10.1590/S0103-50532012000500025

Published online: April 3, 2012

J. Braz. Chem. Soc. 2012, 23(5), 977-983

Cytotoxic sesquiterpene lactones and other constituents of Centaurea omphalotricha

El Hadj Kolli; Francisco León; Fadila Benayache; Sara Estévez; José Quintana; Francisco Estévez; Ignacio Brouard; Jaime Bermejo; Samir Benayache

How to cite this article

 

Phytochemical study of the aerial parts of Centaurea omphalotricha Coss. & Durieu ex Batt. et Trab., an Algerian endemic plant, afforded three new sesquiterpene lactones together with twelve known compounds, some of them display strong cytotoxic properties in human leukemia cells

http://dx.doi.org/10.1590/S0103-50532012000500026

Published online: April 19, 2012

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