JBCS

3:40, Thu Mar 30

Open Access/APCs

vol. 23, No. 11, 2012, p. 1955-2130

 

The Brazilian Chemical Industry

The Brazilian chemical industry reached sales of US$ 158 billions in 2011. Such figure places Brazil in the seventh position in the world ranking of chemical product manufacturers.
The chemical industry is known worldwide for its strong added value, capillarity and positive multiplier effect on the economy, contributing to the development of the country.

(Read more at Editorial)


Cover Article
J. Braz. Chem. Soc. 2012, 23(11), 2054-2064

The Violacein Biosynthesis Monitored by Multi-Wavelength Fluorescence Spectroscopy and by the PARAFAC Method

Clecio Dantas; Pedro L. O. Volpe; Nelson Durán; Márcia M. C. Ferreira

How to cite this article

A culture of Chromobacterium violaceum was cultivated in a bioreactor from which aliquots were collected every two hours and analyzed by multi-wavelength fluorescence spectroscopy. The mechanistic investigation of the violacein biosynthesis was then performed by the chemometric method parallel factor analysis (PARAFAC) that was applied to resolve the fluorescence profiles. View the article.by Dantas and co-workers in the link below

http://dx.doi.org/10.1590/S0103-50532012005000083

Published online: December 5, 2012

Editorial J. Braz. Chem. Soc. 2012, 23(11), 1955-1958

The Brazilian Chemical Industry

Pedro Wongtschowski

How to cite this article

 

http://dx.doi.org/10.1590/S0103-50532012001100001


Account J. Braz. Chem. Soc. 2012, 23(11), 1959-1971

Recent Advances in the Development of Magnetically Recoverable Metal Nanoparticle Catalysts

Liane M. Rossi; Marco A. S. Garcia; Lucas L. R. Vono

How to cite this article

 

The immobilization of catalytic active species (metal nanoparticles, metal complexes, enzymes, organocatalysts, etc.) on superparamagnetic nanoparticles allows the facile separation of catalysts from the reaction mixture with the application of an external magnetic field

http://dx.doi.org/10.1590/S0103-50532012001100002

Published online: December 14, 2012

Articles J. Braz. Chem. Soc. 2012, 23(11), 1972-1981

Physicochemical and Morphological Characterizations of Glyceryl Tristearate/Castor Oil Nanocarriers Prepared by the Solvent Diffusion Method

Cristiana L. Dora; Jean-Luc Putaux; Isabelle Pignot-Paintrand; Frédéric Dubreuil; Valdir Soldi; Redouane Borsalib; Elenara Lemos-Senna

How to cite this article

 

Structural characterizations of drug lipid nanocarriers made from castor oil (CO) and tristearin (TS). NE: nanoemulsions, NLC: nanostructured lipid carriers, SLN: solid nanocarriers

http://dx.doi.org/10.1590/S0103-50532012005000066

Published online: October 30, 2012

J. Braz. Chem. Soc. 2012, 23(11), 1982-1988

Iron(III) Chloride Catalyzed Glycosylation of Peracylated Sugars with Allyl/Alkynyl Alcohols

Senthil Narayanaperumal; Rodrigo César da Silva; Julia L. Monteiro; Arlene G. Corrêa; Márcio W. Paixão

How to cite this article

 

The cost-effective ferric chloride showed to be an efficient catalyst for the glycosylation of sugars with allyl and alkynyl alcohols, thus leading to the corresponding glycosides in moderate to good yields. Salient features of this simple method include non-hazardous reaction conditions, low-catalyst loading, good yields and high anomeric selectivity

http://dx.doi.org/10.1590/S0103-50532012005000070

Published online: November 6, 2012


J. Braz. Chem. Soc. 2012, 23(11), 1989-1996

A Multi-Syringe Flow System for Monitoring Moderately Fast Chemical Reactions

Víctor Cerdà; Carlos Ubide; Juan Zuriarrain

How to cite this article

 

The bromine generation and the bromine-salicylic acid reactions have been used for validation of MSFIA in the zone stopping mode. The performance of the technique stays between those of FIA and the classical stopped-flow technique

http://dx.doi.org/10.1590/S0103-50532012005000069

Published online: November 9, 2012


J. Braz. Chem. Soc. 2012, 23(11), 1997-2002

Synthesis and Field Evaluation of Synthetic Blends of the Sex Pheromone of Crocidosema aporema (Lepidoptera: Tortricidae) in Soybean

Andrés González; Paula Altesor; Leticia Alves; Paola Liberati; Horacio Silva; Juan Ramos; Ignacio Carrera; David González; Gustavo Seoane; Carmen Rossini; Enrique Castiglioni; Daniela Gamenara

How to cite this article

 

The sex pheromone of the tortricid soybean pest, Crocidosema aporema, was synthesized from 2-pentynol and 1,7-heptanediol, and male captures with different pheromone blends were field-evaluated for the development of pheromone monitoring traps

http://dx.doi.org/10.1590/S0103-50532012005000072

Published online: November 14, 2012


J. Braz. Chem. Soc. 2012, 23(11), 2003-2010

Chemoface: a Novel Free User-Friendly Interface for Chemometrics

Cleiton A. Nunes; Matheus P. Freitas; Ana Carla M. Pinheiro; Sabrina C. Bastos

How to cite this article

 

Chemoface is a free computational tool with user-friendly graphical interface, which is able to work with chemometric methods related to experimental design, pattern recognition, classification and multivariate calibration

http://dx.doi.org/10.1590/S0103-50532012005000073

Published online: November 23, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2011-2015

A Sensitive Fluorescent Assay for Trypsin Activity in Biological Samples using BSA-Au Nanoclusters

Xianxiang Wang; Yanying Wang; Hanbing Rao; Zhi Shan

How to cite this article

 

A novel fluorescence analysis method based on trypsin digestion of the protein template of BSA-stabilized Au nanoclusters for sensitive and selective detection of trypsin activity was developed in this work. The methods are utilized potentially for determination of other proteases in clinical diagnostics of various diseases

http://dx.doi.org/10.1590/S0103-50532012005000075

Published online: November 27, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2016-2020

The Influence of GC/AT Composition on Intercalating and Semi-Intercalating Binding of Ethidium Bromide to DNA

Poghos O. Vardevanyan; Ara P. Antonyan; Marine A. Parsadanyan; Mariam A. Shahinyan; Lilit A. Hambardzumyan; Margarita A. Torosyan; Armen T. Karapetian

How to cite this article

 

Semi-intercalating binding of EtBr occurs along with the ordinary intercalation

http://dx.doi.org/10.1590/S0103-50532012005000076

Published online: November 30, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2021-2026

New Neolignans from Krameria tomentosa A. St.-Hil

Sara A. L. Madeiro; Hellane F. S. de Lucena; Caroline D. Siqueira; Marcelo C. Duarte; Raimundo Braz-Filho; José M. Barbosa Filho; Marcelo S. da Silva; Josean F. Tavares

How to cite this article

 

Two new neolignans 1,1'-(E)-propenyl-4-methoxy-3,4'-oxyneolignan (ottomentosa) and 5-acid-2-(2'-hydroxy-4',6'-dimethoxyphenyl)- benzofuran (sobraline), together with three known neolignans, were isolated from the roots of Krameria tomentosa A. St.-Hil

http://dx.doi.org/10.1590/S0103-50532012005000077

Published online: November 30, 2012


J. Braz. Chem. Soc. 2012, 23(11), 2027-2034

Regional Assessment of Sewage Contamination in Sediments of the Iguaçu and the Barigui Rivers (Curitiba City, Paraná, Southern Brazil) using Fecal Steroids

Lucas Puerari; Renato S. Carreira; Artur C. B. Neto; Lilian C. Albarello; Fabiana D. C. Gallotta

How to cite this article

 

An evaluation of the contamination by sewage in sediments on a regional scale was performed in the Iguaçu River by considering sterols as indicators. Domestic effluents and manure from rural areas are the main source of contamination. The release of untreated sewage may pose a threat to river health during periods of small river water flow

http://dx.doi.org/10.1590/S0103-50532012005000078

Published online: November 30, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2035-2042

Prediction of Microdialysis Relative Recovery of Flavone Derivatives Based on Molecular Descriptors

Shuyu Zhan; Jianping Huang; Qing Shao; Xiaohui Fan; Wenjing Guo

How to cite this article

 

Establish stable and predictive models of multiple linear regression (MLR) and support vector machine (SVM) to predict microdialysis relative recovery of flavone derivatives based on molecular descriptors

http://dx.doi.org/10.1590/S0103-50532012005000074

Published online: November 30, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2043-2053

Interactions between Activin-Like Kinase 5 (ALK5) Receptor and its Inhibitors and the Construction of a Docking Descriptor-Based QSAR Model

Malihe Ebrahimi; Taghi Khayamian; Sajjad Gharaghani

How to cite this article

 

Docking studies showed that hydrophobic and H-bond interactions are the key factors in the interactions between ALK5 and its inhibitors. Descriptors emerging from docking and molecular structure were used in structure-based QSAR model

http://dx.doi.org/10.1590/S0103-50532012005000082

Published online: December 5, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2054-2064

The Violacein Biosynthesis Monitored by Multi-Wavelength Fluorescence Spectroscopy and by the PARAFAC Method

Clecio Dantas; Pedro L. O. Volpe; Nelson Durán; Márcia M. C. Ferreira

How to cite this article

 

Combining multi-wavelength fluorescence spectroscopy and the PARAFAC method to link the information obtained from spectral resolution to a biosynthetic pathway

http://dx.doi.org/10.1590/S0103-50532012005000083

Published online: December 5, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2065-2074

Quantitative Approach to Glucocorticosteroids Analysis in Human Urine using LC-MS/MS

Renata F. Soares; Amanda L. D. de Araújo; Juliana de L. Castro; Luis Nelson L. F. Gomes; Henrique M. G. Pereira; Francisco R. de Aquino Neto

How to cite this article

 

Urinary excretion profile of prednisolone and prednisone after oral administration of prednisolone. The concentration of 30 ng mL-1 is the parameter used to establish an adverse analytical finding to exogenous glucocorticosteroids

http://dx.doi.org/10.1590/S0103-50532012005000081

Published online: December 7, 2012


J. Braz. Chem. Soc. 2012, 23(11), 2075-2083

Determination of Glucocorticoids using Cosurfactants Ultrasonic-Thermostatic-Assisted Cloud Point Extraction Followed by High Performance Liquid Chromatography

Hui Qin; Gao Feng Li; Nan Chen; Ya Ling Yang

How to cite this article

 

2 mL of the solution containing different concentrations of BD, HB and NPP →2.5 mL of DC-193 stock solution and 1mL of nonanoic acid added → standing for 5 min → incubated into ultrasonic-thermostatic bath at 65 °C for 30 min → centrifugation for 3 min at 4000 rpm → achieving a final volume of 0.5 mL by adding acetonitrile → injected into the HPLC system

http://dx.doi.org/10.1590/S0103-50532012005000080

Published online: December 7, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2084-2092

Physicochemical Factors Governing the Partition of Pramipexole and Its Five Impurities in Microemulsion Liquid Chromatographic Systems

Ana M. Vemić; Anđelija M. Malenović; Tijana M. Rakić; Nađa M. Kostić; Biljana S. Jančić-Stojanović; Darko P. Ivanović; Mirjana B. Medenica

How to cite this article

 

Influences of microemulsion droplet properties and column lipophylicity on partition behavior of pramipexole and its five impurities

http://dx.doi.org/10.1590/S0103-50532012005000079

Published online: December 7, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2093-2103

Synthesis of Unstable Cyclic Peroxides for Chemiluminescence Studies

Fernando H. Bartoloni; Marcelo A. de Oliveira; Felipe A. Augusto; Luiz Francisco M. L. Ciscato; Erick L. Bastos; Wilhelm J. Baader

How to cite this article

 

The synthesis, purification and characterization of diphenoyl peroxide and three 1,2-dioxetanones (a-peroxylactones), important high-energy intermediates in chemi and bioluminescence transformations, are reported

http://dx.doi.org/10.1590/S0103-50532012001100018

Published online: December 7, 2012


J. Braz. Chem. Soc. 2012, 23(11), 2104-2113

Development and Validation of an LC-UV Method for Quantification of a New Thiazolidinedione (LPSF/AC-23) with Antitumor Activity in Rat Plasma

Raphael D. Valério; Ricardo M. Silva; Hellencléia P. Cunha; Maria C. A. Lima; Suely L. Galdino; Ivan R. Pitta; Maria Bernadete S. Maia

How to cite this article

 

A quick and simple LC-UV method was developed and validated for quantification of LPSF/AC-23 (CAS No. 675868-75-4), a new antitumor agent in rat plasma. The proposed method can be applied in the quantitative determination of this promising molecule in pharmacokinetic bioavailability studies

http://dx.doi.org/10.1590/S0103-50532012001100019

Published online: December 12, 2012

J. Braz. Chem. Soc. 2012, 23(11), 2114-2121

Lodenafil Carbonate Tablets: Optimization and Validation of a Capillary Zone Electrophoresis Method

Cristiane F. Codevilla; Pâmela Cristina L. Ferreira; Maximiliano S. Sangoi; Pedro Eduardo Fröehlich; Ana Maria Bergold

How to cite this article

 

A simple capillary zone electrophoresis method for determination of lodenafil carbonate in drug products was developed and validated. Response surface methodology was used for optimization of the pH and concentration of the buffer, applied voltage and temperature

http://dx.doi.org/10.1590/S0103-50532012001100020

Published online: December 12, 2012

Short Report J. Braz. Chem. Soc. 2012, 23(11), 2122-2127

Regiospecific Synthesis of New Fatty N-Acyl Trihalomethylated Pyrazoline Derivatives from Fatty Acid Methyl Esters (FAMEs)

Paulo Beck; Juliane M. dos Santos; Bruna L. Kuhn; Dayse N. Moreira; Alex F. C. Flores; Marcos A. P. Martins; Marcelo G. M. D'Oca; Luciana A. Piovesan

How to cite this article

 

An efficient and regiospecific route to new fatty N-acyl trihalomethylated pyrazoline derivatives from FAMEs (fatty acid methyl esters) was developed

http://dx.doi.org/10.1590/S0103-50532012005000071

Published online: November 6, 2012


Additions and Corrections J. Braz. Chem. Soc. 2012, 23(11), 2128

J. Braz. Chem. Soc. 2012, 23(11), 2129

J. Braz. Chem. Soc. 2012, 23(11), 2130

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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