Regular Issue

Triterpenoid Saponins from Lippia alba (Mill.) N. E. Brown

Mareni R. Farias, Roberto Pértile, Melissa M. Correa, Maria Tereza R. de Almeida, Jorge A. Palermo and Eloir P. Schenkel

Article

* PDF (192KB)/ *Supplementary Information (622KB)

Web release date: March 11 , 2010.

Extraction and Purification of C-phycocyanin from Spirulina platensis in Conventional and Integrated Aqueous Two-Phase Systems

Francine S. Antelo, Andréia Anschau, Jorge A. V. Costa and Susana J. Kalil

Article

* PDF (184KB)

Web release date: March 11 , 2010.

Silica Supported Perchloric Acid: An Efficient Catalyst for the Synthesis of 14-Aryl-14H-dibenzo[a,i]xanthene-8,13-diones

Li Qiang Wu, Yan Fang Wu, Chun Guang Yang, Li Min Yang and Li Juan Yang

Short Report

* PDF (156KB) / *Supplementary Information (1,14MB)

Web release date: March 11 , 2010.

Diesel Degradation in Soil by Fenton Process

Ricardo D. Villa, Alam G. Trovó and Raquel F. Pupo Nogueira

Article

* PDF (321KB)

Web release date: March 11 , 2010.

Identification and Quantification of Furanic Compounds in Tequila and Mezcal using Spectroscopy and Chemometric Methods

Ana C. Muñoz-Muñoz, Juan L. Pichardo-Molina, Gabriel Ramos-Ortíz, Oracio Barbosa-García, José L. Maldonado, Marco A. Meneses-Nava, Nancy E. Ornelas-Soto, Antonio Escobedo and Pedro L. López-de-Alba

Article

* PDF (646KB)

Web release date: March 11 , 2010.

Phenolic Hydrogen Abstraction by the Triplet Excited State of Thiochromanone: a Laser Flash Photolysis Study

Alessandra M. Ribeiro, Ada Ruth Bertoti and José Carlos Netto-Ferreira

Article

* PDF (254KB)

Web release date: March 11 , 2010.

A New Gas Chromatography/Mass Spectrometry (GC-MS) Method for the Multiresidue Analysis of Pesticides in Bread

Diana I. Kolberg, Osmar D. Prestes, Martha B. Adaime and Renato Zanella

Article

* PDF (273KB)

Web release date: March 8 , 2010.

Lewis Acid Free High Speed Synthesis of Nimesulide-Based Novel N-Substituted Cyclic Imides

Kavitha Kankanala, Vangala Ranga Reddy, Khagga Mukkanti and Sarbani Pal

Article

* PDF (226KB)

Web release date: March 8 , 2010.

A New and Concise Strategy to the Enantioselective Synthesis of (S)-2-Amino-4-Oxo-4-(Pyridine-2-yl) Butanoic Acid from Aspartic Acid

Evanoel Crizanto de Lima, Paulo G. de Lima, Carolina C. de Souza, Marta C. L. S. Maior, Ayres G. Dias and Paulo R. R. Costa

Communication

* PDF (147KB) / *Supplementary Information (1.72MB)

Web release date: March 4, 2010.

Thiram and Picloram as Entrapping Agents for Lead Depicted by Electrochemical Methods

Eliana M. A. Valle, Carolina Santamaría, Sergio A. S. Machado and José M. Fernández

Article

* PDF (265KB)

Web release date: March 4, 2010.

Development of a Green Microwave Assisted Extraction Method for Triazine Herbicides Determination in Soil Samples

Valquíria M. Silva, Willian F. Costa, Jesuí V. Visentainer, Nilson E. Souza and Cláudio C. Oliveira

Article

* PDF (225KB)

Web release date: March 4, 2010.

Pyrazole Synthesis under Microwave Irradiation and Solvent-free Conditions

Lilian Buriol, Clarissa P. Frizzo, Mara R. B. Marzari, Dayse N. Moreira, Liziê D. T. Prola, Nilo Zanatta, Helio G. Bonacorso and Marcos A. P. Martins

Article

* PDF (328KB) / *Supplementary Information (520kB)

Web release date: March 4, 2010.

Electron Energy-Loss Cross Sections for the Chemical Bond Overlap Plasmon of the Hydrogen Molecule

Oscar L. Malta, Renaldo T. Moura Jr. and Ricardo L. Longo

Article

* PDF (458KB)

Web release date: March 4, 2010.

Chiral Auxiliary-Mediated Enantioenrichment of (±)-Ibuprofen, under Steglich conditions, with Secondary Alcohols derived from (R)-Carvone

Marcela Amongero, Damian Visnovezky and Teodoro S. Kaufman

Article

* PDF (476KB)

Web release date: March 4, 2010.

Application of a Purge-and-Trap System for Fixed-NH4+ Determination by Matrix Interference Free Ion Chromatography in Oil Reservoir Rocks

Fernanda V. M. Pontes, Manuel C. Carneiro, Delmo S. Vaitsman, Maria Inês C. Monteiro, Lílian I. D. da Silva and Arnaldo A. Neto

Short Report

* PDF (105KB)

Web release date: March 4, 2010.

Synthesis and Antimicrobial Activity of Chromone-linked 2-Pyridone Fused with 1,2,4-Triazoles, 1,2,4-Triazines and 1,2,4-Triazepines Ring Systems

Tarik El-Sayed Ali and Magdy Ahmed Ibrahim

Article

* PDF (399KB) / *Supplementary Information (571kB)

Web release date: March 4, 2010.

PEG1000-DAIL / Methylcyclohexane Temperature-dependent Biphasic System that Regulates Homogeneously Catalyzed Chloromethylation of Aromatic Hydrocarbons

Yu-Lin Hu, Ming Lu, Chun-Xu Lu, Jun Luo and Xiao-Bin Liu

Short Report

* PDF (202KB)

Web release date: March 1, 2010.

Transition Metal-based Bimetallic Catalysts for the Chemoselective Hydrogenation of Furfuraldehyde

Virginia Vetere, Andrea B. Merlo, José F. Ruggera and Mónica L. Casella

Article

* PDF (298KB)

Web release date: March 1, 2010.

Resveratrol May Protect Plasma Proteins from Oxidation under Conditions of Oxidative Stress In Vitro

Kanti Bhooshan Pandey and Syed Ibrahim Rizvi

Article

* PDF (165KB)

Web release date: March 1, 2010.

Novel Synthesis of Primary Arylamides from Aryl Methylketone Oxidations using Iodine in Aqueous Ammonia

Norma A. Angeles, Felipe Villavicencio, Carlos Guadarrama, David Corona and Erick Cuevas-Yañez

Article

* PDF (134KB)

Web release date: March 1, 2010.

Online Isotope Dilution and Inductively Coupled Plasma Mass Spectrometry: from Elemental to Species Quantification

Maria Fernanda Giné and Ana Paula Packer

Review

* PDF (981KB)

Web release date: February 25, 2010.

Synthesis of Some New Mono, Bis-Indolo[1, 2-c]quinazolines: Evaluation of their Antimicrobial Studies

Rondla Rohini, P. Muralidhar Reddy, Kanne Shanker, Anren Hu and Vadde Ravinder

Article

* PDF (337KB) / *Supplementary Information (543kB)

Web release date: February 25, 2010.

An Investigation of the BSSE Effect on the Evaluation of Ab Initio Interaction Energies for Cisplatin-Water Complexes

Juliana Fedoce Lopes, Willian R. Rocha, Hélio F. dos Santos and Wagner B. de Almeida

Article

* PDF (3,7MB)

Web release date: February 18, 2010.

Activities of Extracts and Compounds from Spiranthera odoratissima St. Hil. (Rutaceae) in Leaf-cutting Ants and their Symbiotic Fungus

Ana Paula Terezan, Raquel Andrade Rossi, Roberta N. A. Almeida, Taís Garcia Freitas, João B. Fernandes, M. Fátima das Graças Fernandes da Silva, Paulo C. Vieira, Odair C. Bueno, Fernando C. Pagnocca and José R. Pirani

Article

* PDF (165KB) / *Supplementary Information (860kB)

Web release date: February 11, 2010.

2D and 3D QSAR Studies of the Receptor Binding Affinity of Progestins

Lea da Silva Veras, Masamoto Arakawa, Kimito Funatsu and Yuji Takahata

Article

* PDF (671KB)

Web release date: February 11, 2010.

New Ceramides from Acnistus arborescens

Ana Isabel V. Maia, Maria Leopoldina Veras, Raimundo Braz-Filho, Norberto P. Lopes, Edilberto R. Silveira and Otilia Deusdênia L. Pessoa

Article

* PDF (168KB) / *Supplementary Information (3,04MB)

Web release date: February 11, 2010.

Simple Method for Fast Deprotection of Nucleosides by Triethylamine-Catalyzed Methanolysis of Acetates in Aqueous Medium

Lidiane Meier, Gustavo C. Monteiro, Rodrigo A. M. Baldissera and Marcus Mandolesi Sá

Article

* PDF (211KB)

Web release date: February 11, 2010.

Influence of Fruit Biotypes on the Chemical Composition and Antifungal Activity of the Essential Oils of Eugenia uniflora Leaves

Deomar P. Costa, Elenilson G. Alves Filho, Lorena M. A. Silva, Suzana C. Santos, Xisto S. Passos, Maria do Rosário R. Silva, José C. Seraphin and Pedro H. Ferri

Article

* PDF (243KB) / *Supplementary Information (279KB)

Web release date: February 11, 2010.

Synthesis, Characterization, EPR Spectroelectrochemistry Studies and Theoretical Calculations of Manganese(II) Complexes with the Ligands H3bpeten and H3bnbpeten

Stela Maris de M. Romanowski, Sérgio P. Machado, Geraldo R. Friedermann, Antonio S. Mangrich, Monique de F. Hermann, Hugo Orofino Lima and Shirley Nakagaki

Article

* PDF (1,23MB) / *Supplementary Information (647KB)

Web release date: February 11, 2010.

Conformational Analysis of Phloroglucinols from Hypericum Brasiliense by using X-ray Diffraction and Molecular Modeling

Kátia Z. Leal, Julliane D. Yoneda, Eric B. Lindgren, Carlos B. Pinheiro, Arthur L. Corrêa and Hildegardo S. França

Article

* PDF (223KB) / *Supplementary Information (92KB)

Web release date: February 08, 2010.

Synthesis of Novel Room Temperature Chiral Ionic Liquids. Application as Reaction Media for the Heck Arylation of Aza-endocyclic Acrylates

Julio C. Pastre, Yves Génisson, Nathalie Saffon, Jany Dandurand and Carlos R. D. Correia

Article

* PDF (445KB) / *Supplementary Information (1,10MB)

Web release date: February 8, 2010.

Differential Metabolic and Biological Profiles of Lychnophora ericoides Mart. (Asteraceae) from Different Localities in the Brazilian “campos rupestres”

Leonardo Gobbo-Neto, Thais Guaratini, Cláudia Pessoa, Manoel O. de Moraes, Letícia V. Costa-Lotufo, Roberto F. Vieira, Pio Colepicolo and Norberto P. Lopes

Article

* PDF (220KB) / *Supplementary Information (243KB)

Web release date: February 8, 2010.

Sulfadiazine Determination in Pharmaceuticals by Electrochemical Reduction on a Glassy Carbon Electrode

Otoniel C. Braga, Iolana Campestrini, Iolanda C. Vieira and Almir Spinelli

Article

* PDF (472KB)

Web release date: February 4, 2010.

A Novel One-pot Three-step Synthesis of 2-(1-Benzofuran-2-yl)quinoline-3-carboxylic Acid Derivatives

Wentao Gao, Chaohua Zhang and Yang Li

Article

* PDF (210KB) / *Supplementary Information (708KB)

Web release date: February 4, 2010.

Potentiometric and Spectrophotometric Studies of MnII and NiII Cimetidine Complexes

Francieli Kanumfre, Eliane M. de Lima, Gabriele Scheidt, Paulo I. B. Carneiro and Neiva D. Rosso

Article

* PDF (383KB)

Web release date: February 4, 2010.

Microwave-Assisted Synthesis of Nitroketene N,S-Arylaminoacetals

Diego P. Sangi and Arlene G. Corrêa

Article

* PDF (194KB) / *Supplementary Information (1,33MB)

Web release date: February 4, 2010.

1,3-Thiazolium-5-thiolates Mesoionic Compounds: Semiempirical Evaluation of their First Static Hyperpolarizabilities and Synthesis of New Examples

Bruno F. Lyra, Soraya A. de Morais, Gerd B. Rocha, Joseph Miller, Gustavo L. C. Moura, Alfredo M. Simas, Clovis Peppe and Petrônio F. de Athayde-Filho

Short Report

* PDF (580KB) / *Supplementary Information (1,0MB)

Web release date: February 4, 2010.

An Efficient Protocol for Accessing b-Amino Dicarbonyl Compounds through aza-Michael Reaction

Ihssan Meskini, Loïc Toupet, Maria Daoudi, Abdelali Kerbal, Brahim Bennani, Pierre H. Dixneuf, Zahid H. Chohan, Ana Cristina Lima Leite and Taibi Ben Hadda

Short Report

* PDF (799KB) / *Supplementary Information (1,20MB)

Web release date: February 1, 2010.

Three Dimensional Image Analysis for Prediction of Vinyl Triethoxysilane Concentration and Porosity Percent of Methyl Methacrylate/Ethylene Glycol Dimethacrylate Copolymers using Scanning Electron Microscopy

Mahnaz Esteki, Taghi Khayamian and Hamid J. Naghash

Article

* PDF (462KB)

Web release date: February 1, 2010.

Physicochemical Stability of Poly(lactide-co-glycolide) Nanocapsules Containing the Local Anesthetic Bupivacaine

Carolina M. Moraes, Eneida de Paula, André H. Rosa and Leonardo F. Fraceto

Article

* PDF (188KB)

Web release date: February 1, 2010.

Solid Phase Microextraction as an Efficient Method for Characterization of the Interaction of Pesticides with Different Soil Types

Rada D. Durovic, Jelena S. Gajic Umiljendic, Svjetlana B. Cupac and Ljubisa M. Ignjatovic

Article

* PDF (381KB)

Web release date: February 1, 2010.

Theoretical and Voltammetric Studies of 5-Nitro-heterocyclic Derivatives with Potential Trypanocidal Activities

Fávero R. Paula, Gustavo H. G. Trossini, Elizabeth I. Ferreira, Silvia H. P. Serrano, Carla M. S. Menezes and Leoberto C. Tavares

Article

* PDF (609KB)

Web release date: January 28, 2010.

Determination of Cd in Blood by Microwave-Induced Combustion Coupled to Flame Furnace Atomic Absorption Spectrometry

Lucélia Hoehne, Fabiane R. Bartz, Cezar A. Bizzi, José N. G. Paniz, Valderi L. Dressler and Érico M. de Moraes Flores

Article

* PDF (281KB)

Web release date: January 28, 2010.

Potencial Application of Native Lipases in the Resolution of (RS)-Phenylethylamine

Cristiane Pilissão, Patrícia de O. Carvalho and Maria da G. Nascimento

Article

* PDF (248KB)

Web release date: January 28, 2010.

The Photochemical Reactivity of Triplet b-Lapachone-3-sulfonic Acid Towards Biological Substrates

José C. Netto-Ferreira, Virginie Lhiaubet-Vallet, Andrea R. da Silva, Ari M. da Silva, Aurelio B. B. Ferreira and Miguel A. Miranda

Article

* PDF (351KB)

Web release date: January 28, 2010.

Laser Flash Photolysis Study of the Photochemistry of Thioxanthone in Organic Solvents

Janaina F. Rodrigues, Francisco de Assis da Silva and José Carlos Netto-Ferreira

Article

* PDF (284KB)

Web release date: January 28, 2010.

Ozonation of Ethinylestradiol in Aqueous-Methanolic Solution: Direct Monitoring by Electrospray Ionization Mass Spectrometry

Karla M. Vieira, Clésia C. Nascentes and Rodinei Augusti

Article

* PDF (427KB)

Web release date: January 28, 2010.

(R)-(-)-Carvone and (1R, 4R)-trans-(+)-Dihydrocarvone from Poiretia latifolia Vogel

Carla Porto, Caroline Z. Stüker, Anderson S. Mallmann, Euclesio Simionatto, Adriana Flach, Tais do Canto-Dorow, Ubiratan F. da Silva, Ionara I. Dalcol and Ademir F. Morel

Article

* PDF (191KB) / *Supplementary Information (234KB)

Web release date: January 28, 2010.

Isolation, X-ray Crystal Structure and Theoretical Calculations of the New Compound 8-epicordatin and Identification of Others Terpenes and Steroids from the Bark and Leaves of Croton palanostigma Klotzsch

Davi S. B. Brasil, Adolfo H. Müller, Gisele M. S. P. Guilhon, Cláudio N. Alves, Gabriel Peris, Rosa Llusar and Vicent Moliner

Article

* PDF (509KB) / *Supplementary Information (1,94MB)

Web release date: January 28, 2010.

Assessment of Extractability of Cu, Cr, Ni, Pb and Zn in some Chilean Biosolid-Amended Soils by using BCR Sequential Extraction Procedure

Inés Ahumada, Adolfo Maricán, Mauricio Retamal, Cristina Pedraza, Loreto Ascar, Adriana Carrasco and Pablo Richter

Article

* PDF (1,68MB)

Web release date: January 21, 2010.

Effects of Reaction Conditions on the Grafting Percentage of Poly(ethylene glycol)-block-poly(g-benzyl L-glutamate)-graft-poly(ethylene glycol) Copolymer

Guo-quan Zhu, Fa-gang Wang and Yu-ying Liu

Article

* PDF (1,09MB)

Web release date: December 30, 2009.

Kinetics of Deoxynivalenol Degradation by Aspergillus oryzae and Rhizopus oryzae in Submerged Fermentation

Jaqueline Garda-Buffon and Eliana Badiale-Furlong

Article

* PDF (190KB)

Web release date: December 30, 2009.

Counter-Current Chromatography Separation of Isatin Derivatives using the Sandmeyer Methodology

Márcia R. Almeida, Gilda G. Leitão, Bárbara V. Silva, Jussara P. Barbosa and Angelo C. Pinto

Short Report

* PDF (422KB)

Web release date: December 30, 2009.

Determination of Metallic Contaminants in Human Recombinant Erythropoietin (EPO) Formulations by Adsorptive Cathodic Stripping Voltammetry and UV Photo-Decomposition of Samples

Leandro M. de Carvalho, Júlia C. Garmatz, Cristiane Spengler, Paulo C. do Nascimento, Denise Bohrer, Cibele M. Canabarro, Solange C. Garcia and Marcelo B. da Rosa

Article

* PDF (325KB)

Web release date: December 21, 2009.

A Comparative Study of Irradiation Systems for Photoinactivation of Microorganisms

Lucas F. de Paula, Renata O. Santos, Henrique D. Menezes, Jonas R. de Britto, João B. Vieira Jr., Paulo P. Gomtijo Filho and Carlos A. de Oliveira

Article

* PDF (459KB)

Web release date: December 21, 2009.

Arsenic Determination in Pharmaceutical Grade Barium Sulfate using Direct Solid Sampling Electrothermal Atomic Absorption Spectrometry

Rodrigo C. Bolzan, Diogo P. de Moraes, Julio Cezar P. de Mattos, Valderi L. Dressler and Érico M. de Moraes Flores

Article

* PDF (427KB)

Web release date: December 21, 2009.

Design, Synthesis and in vitro Evaluation on Glucosamine-6P Synthase of Aromatic Analogs of 2-Aminohexitols-6P

Danielle F. Dias, Céline Roux, Philippe Durand, Bogdan Iorga, Marie A. Badet-Denisot, Bernard Badet and Ricardo J. Alves

Article

* PDF (844KB)

Web release date: December 21, 2009.

Stripping Voltammetric Methods for Determination of the Antiparasitic Drug Nitazoxanide in Bulk Form, Pharmaceutical Formulation and Human Serum

Hanaa S. El-Desoky, Mohamed M. Ghoneim and Mohamed M. Abdel-Galeil

Article

* PDF (446KB)

Web release date: December 21, 2009.

New Coumarins from Clausena lansium Twigs

Wisanu Maneerat, Uma Prawat, Nisakorn Saewan and Surat Laphookhieo

Article

* PDF (170KB) / *Supplementary Information (926KB)

Web release date: December 16, 2009.

Tropical Peat as a Versatile Material for Solid-Phase Extraction of Pesticides from Medicinal Plant Cordia salicifolia

Pedro H. V. de Carvalho, Amanda M. D. de Jesus, Vanessa M. Prata, Débora S. S. Bezerra, Luciane P. C. Romão and Sandro Navickiene

Article

2

* PDF (307KB)

Web release date: December 16, 2009.

Electrochemical Removal of CuIIin the Presence of Humic Acid

Claudomiro P. Barbosa, Geoffroy R. P. Malpass, Douglas W. Miwa, Luciano Gomes, Rodnei Bertazzoli and Artur J. Motheo

Article

* PDF (320KB)

Web release date: December 16, 2009.

Pesticide Residue Determination in Groundwater using Solid-Phase Extraction and High-Performance Liquid Chromatography with Diode Array Detector and Liquid Chromatography-Tandem Mass Spectrometry

Sergiane S. Caldas, Adriana Demoliner, Fabiane P. Costa, Marcelo G. M. D’Oca and Ednei G. Primel

Article

* PDF (316KB)

Web release date: December 16, 2009.

Evidences of Siderophores Synthesis by Grapevine Xylella fastidiosa, Causal Agent of Pierce’s Disease, through Instrumental Approaches

Ana Valéria C. Simionato, Maria Estela Silva-Stenico, Siu Mui Tsai and Emanuel Carrilho

Article

* PDF (852KB)

Web release date: December 15, 2009.

Improving the Computational Efficiency of the Successive Projections Algorithm by using a Sequential Regression Implementation: a Case Study Involving NIR Spectrometric Analysis of Wheat Samples

Anderson S. Soares, Arlindo R. Galvão Filho, Roberto K. H. Galvão, Mário César U. Araújo

Short Report

* PDF (300KB)

Web release date: December 15, 2009.

Direct Determination of Lanthanides in Environmental Samples using Ultrasonic Nebulization and ICP OES

Fabrina R. S. Bentlin and Dirce Pozebon

Article

* PDF (2,02MB) / *Supplementary Information (446KB)

Web release date: December 15, 2009.

Efficient and Selective Iodination of Phenols Promoted by Iodine and Hydrogen Peroxide in Water

Rafael D. C. Gallo, Karimi S. Gebara, Rozanna M. Muzzi and Cristiano Raminelli

Short Report

* PDF (548KB)

Web release date: December 15, 2009.

Calibration Techniques and Modifiers for the Determination of Cd, Pb and Tl in Biodiesel as Microemulsion by Graphite Furnace Atomic Absorption Spectrometry

JJessee S. Azevedo Silva, Eduardo S. Chaves, Éder J. dos Santos, Tatiana D. Saint’Pierre, Vera Lúcia A. Frescura and Adilson J. Curtius

Article

* PDF (573KB)

Web release date: December 15, 2009.

Two New Copper(II) Complexes of 1-Butyl-1H-1,2,4-triazole: Synthesis, Characterization and Electrocatalytic Activity

Ke Fei Wang, Fang Fang Jian and Rui Rui Zhuang

Article

* PDF (365KB) / *Supplementary Information (122KB)

Web release date: December 15, 2009.

Properties of (m-Oxo)di-iron Complexes and Catalytic Activity toward Cyclohexane Oxidation

Gabrieli L. Parrilha, Sarah S. Ferreira, Christiane Fernandes, Giselle C. Silva, Nakédia M. F. Carvalho, O. A. C. Antunes, Valderes Drago, Adailton J. Bortoluzzi and Adolfo Horn Jr.

Article

* PDF (616KB)

Web release date: December 11, 2009.

Pt-Cu/C and Pd Modified Pt-Cu/C Electrocatalysts for the Oxygen Reduction Reaction in Direct Methanol Fuel Cells

Emilia A. Carbonio, Flavio Colmati, Eduardo G. Ciapina, Maristela E. Pereira and Ernesto R. Gonzalez

Article

* PDF (1,33MB) / *Supplementary Information (1,10MB)

Web release date: December 3, 2009.

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