28/7/2011
Saiu o JBCS número 8 - Volume 22
O JBCS acaba de lançar online seu oitavo número de 2011 (vol. 22-8, correspondente a Agosto). A impressão e, portanto, distribuição da revista aos assinantes ocorrerá em breve.
Neste novo número, ilustrando nosso novo design de capa, temos o Article Spatial and Seasonal Variations of Pharmaceuticals and Endocrine Disruptors in the Atibaia River, Sao Paulo State (Brazil) dos autores Cassiana C. Montagner e Wilson F. Jardim. O texto editorial de autoria de Nicole J. Moreau (Presidente da IUPAC) trata do tema "O Ano Internacional da Química a Meio Caminho". Ao todo, o JBCS vol. 22, No. 8 apresenta 217 páginas impressas, contendo 25 Artigos.
Assinem, e divulguem o JBCS. Façam um link de nossa página http://jbcs.sbq.org.br em sua instituição, laboratório ou empresa já que o acesso é aberto. Incentivem a leitura, pesquisa e citação ao JBCS.
Fonte: Elizabeth Magalhaes (JBCS)
Table of Contents with Graphical Abstracts
>> Editorial(208 KB)
The International Year of Chemistry at Half Time
Nicole J. Moreau |
| J. Braz. Chem. Soc. 2011, 22, 1395. |
Photocatalytic Production of Hydrogen: an Innovative Use for Biomass Derivatives |
| Marcos de Oliveira Melo and Luciana Almeida Silva |
| J. Braz. Chem. Soc. 2011, 22, 1399. |
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| The photocatalytic reforming of aqueous biomass solutions could be an interesting and innovative route to produce hydrogen in ambient conditions. This process is able to produce hydrogen from renewable energy sources, since it uses solar radiation, raw materials derived from renewable sources such as biomass and water. |
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Web Release date: April 28, 2011. |
Chitosan/Siloxane Hybrid Polymer: Synthesis, Characterization and Performance as a Support for Immobilizing Enzyme |
| Grazielle S. Silva, Pedro C. Oliveira, Domingos S. Giordani and Heizir F. de Castro |
| J. Braz. Chem. Soc. 2011, 22, 1407. |
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The performance of a silica/chitosan hybrid matrix synthesized by sol-gel process was evaluated, using TEOS as a precursor to immobilize enzymes having potential industrial applications. Lipase from enzyme Burkholderia cepacia was chosen as model system. Support (SiO2-chitosan) and immobilized derivative were characterized with respect to their morphological and biochemical properties.
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Web Release date: March 31, 2011. |
Comparative Study of the Salinization Process in Surface Water Reservoirs Located in Two Distinct Regions in Southwestern Bahia, Brazil |
| José S. dos Santos, Maria Lúcia P. dos Santos and Daniela Marques Alexandrino |
| J. Braz. Chem. Soc. 2011, 22, 1418. |
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| The water collected in the Anagé Reservoir during the rainy season was classified as S3 and S4, showing very high sodicity values. So it was considered inappropriate for irrigation use. |
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Web Release date: March 31, 2011. |
Simultaneous Regioselective Synthesis of Trifluoromethyl-Containing 1,7-Phenanthrolines and Quinolines from Cyclocondensation Reaction of N,N'-Bis(oxotrifluoroalkenyl)-1,3-Phenylenediamines |
| Helio G. Bonacorso, Rosália Andrighetto, Nícolas Krüger, Marcos A. P. Martins and Nilo Zanatta |
| J. Braz. Chem. Soc. 2011, 22, 1426. |
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| An interesting chemical behavior for cyclization reactions of a variety of enaminones was described. Selective routes of ring closure were also observed, including direct cyclocondensations, hydrolyses and recombinations, which simultaneously furnished fused bis-(trifluoromethyl)-diazatricycles and 7-aminoquinolines. |
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Web Release date: March 31, 2011. |
Synthesis of 1,3-Diynes via Detelluration of Bis(ethynyl)tellurides |
| Hélio A. Stefani, Jesus M. Pena, Julio Zukerman-Schpector and Edward R. T. Tiekink |
| J. Braz. Chem. Soc. 2011, 22, 1439. |
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| The synthesis of symmetric conjugated diyne systems with electron-withdrawing or electron-donating substituents via a palladium-catalyzed detelluration of bis(arylethynyl)tellurides and bis(alkylethynyl) tellurides is described. |
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Web Release date: April 5, 2011. |
Predicting Partition Coefficients of Migrants in Food Simulant/Polymer Systems using Adaptive Neuro-Fuzzy Inference System |
Parviz Shahbazikhah, Mohammad Asadollahi-Baboli, Ramin Khaksar, Reza Fareghi Alamdari and
Vali Zare-Shahabadi |
| J. Braz. Chem. Soc. 2011, 22, 1446. |
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| Adaptive neuro-fuzzy inference system (ANFIS) has five layers in which layers 0 and 5 represent the descriptors and response, respectively. In this study, ANFIS was employed to predict the partition coeffiction of migrants in food/packaging systems. Forty four systems consisted of 4 food stimulants, 6 migrants and 2 packaging materials were studied. |
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Web Release date: April 7, 2011. |
Spatial and Seasonal Variations of Pharmaceuticals and Endocrine Disruptors in the Atibaia River, São Paulo State (Brazil) |
| Cassiana C. Montagner and Wilson F. Jardim |
| J. Braz. Chem. Soc. 2011, 22, 1452. - cover article |
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| Map of the study area showing the sampling sites. Red bars account the concentrations of caffeine in the dry season and blue bars represent the concentrations of caffeine in wet season. |
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Web Release date: April 12, 2011. |
Utilization of a Novel Ag(III)-Luminol Chemiluminescence System for Determination of d -Penicillamine in Human Urine Samples |
| Li Ma, Mengdi Fan, Xiangdong Xu, Weijun Kang and Hongmei Shi |
| J. Braz. Chem. Soc. 2011, 22, 1463. |
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d-Penicillamine can dramatically enhance the chemiluminescence(CL) intensities of the novel reaction system: the reaction between Ag(III) complex with luminol. Chemiluminescence spectra: A, Luminol- [Ag(HIO6)2]5- system; B, d-Penicillamine-luminol-[Ag(HIO6)2]5- system.
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Web Release date: April 14, 2011. |
Evaluation of a PVC Sensing Phase for Determination of Chlorinated Hydrocarbons in Water by Mid-Infrared Spectroscopy |
| Andréa Monteiro S. Silva, Eduardo de Araujo Viana, Maria Fernanda Pimentel, Yeda M. B. Almeida and Ivo M. Raimundo Jr. |
| J. Braz. Chem. Soc. 2011, 22, 1470. |
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| PVC sensing phase used for extraction of hydrocarbons from water and the absorption spectra obtained for chlorobenzene, trichloroethylene and trichlorobenzene. |
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Web Release date: April 19, 2011. |
Aspects of Protonation and Deprotonation of Humic Acid Surface on Molecular Conformation |
| Alexandre G. S. Prado, Jonas Pertusatti and Alécio R. Nunes |
| J. Braz. Chem. Soc. 2011, 22, 1478. |
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| The comprehension of pH dependence on charge behavior around surfaces is important in order to control the colloidal stability of dispersion. Around a charged surface in aqueous solution, a diffuse electric double layer takes place, which protects the charge and let all the system uncharged. |
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Web Release date: April 19, 2011. |
Distribution and Availability of Copper, Iron, Manganese and Zinc in the Archaeological Black Earth Profile from the Amazon Region |
Cleide S. T. Mescouto, Vanda P. Lemos, Heronides A. Dantas Filho, Marcondes L. da Costa,
Dirse C. Kern and Kelly G. Fernandes |
| J. Braz. Chem. Soc. 2011, 22, 1484. |
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| Availability of micronutrients (Cu, Fe, Mn and Zn) and organic matter (OM) showing the relationship between their concentrations along the soil profile at an archaeological site Terra Preta 2, district of Juruti, Pará State. |
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Web Release date: April 26, 2011. |
Assessment of Surface Water in Two Amazonian Rivers Impacted by Industrial Wastewater, Barcarena City, Pará State (Brazil) |
Marcelo de O. Lima, Elisabeth C. O. Santos, Iracina M. de Jesus, Adaelson C. Medeiros,
Kelson do C. F. Faial and Cláudio N. Alves |
| J. Braz. Chem. Soc. 2011, 22, 1493. |
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| The wastewaters discharge into the Curuperê River from the industrial processing of kaolin at Barcarena City at Pará State (Brazil) caused changes in abiotic conditions also affecting the Dendê River. Environmental impacts from the analyses of the physicochemical characterization and metal levels obtained for surface waters of both rivers were observed. |
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Web Release date: April 26, 2011. |
Improved Synthesis of 1,3,4-Thiadiazolium-2-phenylamines using Microwave and Ultrasound Irradiation and Investigation of their Cytotoxic Activity |
| Camilla Moretto dos Reis, Juliana Echevarria-Lima, Amanda Fraga Miranda and Aurea Echevarria |
| J. Braz. Chem. Soc. 2011, 22, 1505. |
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| A new and efficient synthesis of eight 1,3,4-thiadiazolium-2-phenylamine derivatives was realized using microwave and ultrasound irradiation. The target compounds were obtained in good yields and remarkably short times. The cytotoxicity against K562 human leukemia and Daudi lymphoma lines was also evaluated. |
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Web Release date: May 3, 2011. |
Chemotaxonomical Aspects of Lower Cretaceous Amber from Recôncavo Basin, Brazil |
| Ricardo Pereira, Ismar S. Carvalho, Antonio Carlos S. Fernandes and Débora A. Azevedo |
| J. Braz. Chem. Soc. 2011, 22, 1511. |
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| Chemotaxonomical studies concerning terpenoid composition of Brazilian amber samples allowed proposing the existence of a resinous paleoflora constituted by conifer families associated to Maracangalha Formation (Recôncavo Basin). The amber occurrence described here is evidence about the distribution of conifers in Brazil during Lower Cretaceous. |
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Web Release date: May 3, 2011. |
Alternative Analytical Method for Metal Determination in Inorganic Fertilizers Based on Ultrasound-Assisted Extraction |
| Alexandre F. Lima, Eduardo M. Richter and Rodrigo A. A. Muñoz |
| J. Braz. Chem. Soc. 2011, 22, 1519. |
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| The development of a "green" sample preparation procedure for the analysis of inorganic fertilizers based on ultrasound-assisted extraction using an ultrasonic bath is described. Samples were sonicated for 5 min in the presence of 2 mL of 50% (v/v) HNO3 inside glass tubes and satisfactory recovery values were obtained. |
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Web Release date: May 3, 2011. |
Multiclass MSPD Method for Pesticide Determination in Dehydrated Hyptis pectinata (Sambacaitá) Medicinal Plant by GC-MS |
Adriano Aquino, Michel R. R. Souza, Samia T. A. Maciel, Marcelo da Rosa Alexandre
and Sandro Navickiene |
| J. Braz. Chem. Soc. 2011, 22, 1525. |
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| Medicinal plants are liable to contain pesticides that may accumulate from agricultural practices. The MSPD is a technique used for the extraction of analytes from solid or viscous samples. The determination of pesticides in medicinal plant is accomplished using gas chromatographic technique. |
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Web Release date: May 5, 2011. |
Eugenia neonitida Sobral and Eugenia rotundifolia Casar. (Myrtaceae) Essential Oils: Composition, Seasonality Influence, Antioxidant Activity and Leaf Histochemistry |
Anna C. A. Defaveri, Alice Sato, Leandro B. Borré, Daniel L. M. Aguiar, Rosane A. S. San Gil,
Rosani C. O. Arruda and Carlos A. S. Riehl |
| J. Braz. Chem. Soc. 2011, 22, 1531. |
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The graphical abstract shows the morphology of Eugenia neonitida in its habitat and the secretory cavities that accumulate the essential oil and from which it volatilizes. The chemical structures are α-pinene, β-pinene, β-caryophyllene, germacrene D and bicyclogermacrene, the major compounds of both studied species essential oils. |
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Web Release date: May 10, 2011. |
Supramolecular Complexes Formed by the Association of Poly(ethyleneimine) (PEI), Sodium Cholate (NaC) and Sodium Dodecyl Sulfate (SDS) |
| Arlindo C. Felippe, Ismael C. Bellettini, Renato Eising, Edson Minatti and Fernando C. Giacomelli |
| J. Braz. Chem. Soc. 2011, 22, 1539. |
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| The image of the graphical abstract cartoons the formation of supramolecular complexes produced by the association of poly(ethyleneimine) (PEI) and mixtures of sodium cholate (NaC) and sodium dodecyl sulfate (SDS). The formation of such complexes has been investigated by using a variety of techniques and the results are given in this article. |
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Web Release date: May 10, 2011. |
A Multi-Walled Carbon Nanotube-Modified Glassy Carbon Electrode as a New Sensor for the Sensitive Simultaneous Determination of Paracetamol and Tramadol in Pharmaceutical Preparations and Biological Fluids |
| Ali Babaei, Ali Reza Taheri and Mohammad Afrasiabi |
| J. Braz. Chem. Soc. 2011, 22, 1549. |
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| Differential pulse voltammograms and the corresponding calibration curves obtained for various concentrations of paracetamol and tramadol at a multi-walled carbon nanotube-modified glassy carbon electrode under optimum conditions. |
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Web Release date: May 12, 2011. |
Enantioselective Resolution of (R,S)-1-Phenylethanol Catalyzed by Lipases Immobilized in Starch Films |
| Isabel Hoffmann, Vanessa D. Silva and Maria da G. Nascimento |
| J. Braz. Chem. Soc. 2011, 22, 1559. |
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| Lipases from different sources were immobilized on ginger starch film or ginger starch/PEO blends. These biocatalytic systems were used in the resolution of (R,S)-phenylethanol with vinylacetate, ethyl acetate, iso-propenyl acetate and acetic anhydride. |
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Web Release date: May 12, 2011. |
Hyphenating the Curtius Rearrangement with Morita-Baylis-Hillman Adducts: Synthesis of Biologically Active Acyloins and Vicinal Aminoalcohols |
| Giovanni W. Amarante, Mayra Cavallaro and Fernando Coelho |
| J. Braz. Chem. Soc. 2011, 22, 1568. |
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| We describe herein an approach to the preparation of acyloins and anti-1,2-aminoalcohols based on a Curtius rearrangement coupled with Morita-Baylis-Hillman adducts as substrates. Based on this new approach, the total synthesis of bupropion and spisulosine were accomplished. |
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Web Release date: May 17, 2011. |
Input of Organic Matter in a Large South American Tropical Estuary (Paranaguá Estuarine System, Brazil) Indicated by Sedimentary Sterols and Multivariate Statistical Approach |
| César C. Martins, Bianca H. Seyffert, Juliana A. F. Braun and Gilberto Fillmann |
| J. Braz. Chem. Soc. 2011, 22, 1585. |
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Cluster analyses according to general inputs (fecal, terrestrial or marine sources) in the total sterols to the sediments from Paranaguá Estuary. Group I distinguish stations where the proportion of sterols
from marine sources is higher while Group II contains the stations where the fecal sterols is extremely low and terrigenous sources are slightly predominant. |
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Web Release date: May 19, 2011. |
Quantum Confinement in PbI2 Nanodisks Prepared with Cucurbit[7]uril |
| Erick M. S. dos Santos, Lourivaldo S. Pereira and Grégoire J.-F. Demets |
| J. Braz. Chem. Soc. 2011, 22, 1595. |
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| Lead iodide nanodisks were prepared using cucurbit[7]uril as a template. These nanoparticles exhibit strong absorption blue-shift as a result of one-dimensional quantum confinement. |
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Web Release date: May 24, 2011. |
Electrochemical Behavior of Propranolol and its Major Metabolites, 4’-Hydroxy-propranolol and 4’-Hydroxypropranolol Sulfate, on Glassy Carbon Electrode |
| Irena Baranowska and Marta Koper |
| J. Braz. Chem. Soc. 2011, 22, 1601. |
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The voltammetric methods for propranolol and metabolites were proposed. The differential pulse voltammetry method on glassy carbon electrode could be used for simultaneous determination of
mentioned species in urine sample after the enrichment step. |
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Web Release date: May 31, 2011. |
Three New Compounds from Piper montealegreanum Yuncker (Piperaceae) |
| Harley da S. Alves, Maria de F. V. de Souza and Maria C. de O. Chaves |
| J. Braz. Chem. Soc. 2011, 22, 1610. |
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| Structural formulas of new constituents isolated from branches of Piper montealegreanum: [(S)-8-formyl-3’,5-dihydroxy-7-methoxy-6-methylflavanone and 3’-formyl-3,4’,6’-trihydroxy-2’-methoxy-5’-methylchalcone. |
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Web Release date: April 19, 2011. |
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