Autores: informamos que, a partir do próximo fascículo (39/9), a revista Química Nova adotará a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.
The Board of Directors of the Sociedade Brasileira de Química-SBQ (publisher of the Química Nova-QN) decided that QN will adopt the full open access format in which authors are required to cover part of the publication costs for their articles. See more...
Anderson R. AlbuquerqueI,II,III; Iêda M. G. SantosII; Júlio R. SambranoI,*
Wulff construction of single crystal TiO2 anatase at the B3LYP-D* level of theory, where the (001) and (101) surfaces are the exposed facets. Charge density maps are shown bellow for each surface.
Laercio Lopes Martins; Gabriel Clemente Franklin; Eliane Soares de Souza; Georgiana Feitosa da Cruz*
Oil fingerprinting technique employed to assess reservoir continuity in tar sand reservoirs. This work recommends the use of pentacyclic terpanes instead of lower molecular weight compounds to calculate peak ratios in order to plot star diagrams.
Fernanda R. PinhatiI,*; Eduardo M. Del AguilaII; Ana Paula R. TôrresIII; Maíra P. de SousaIII; Vânia Maria J. SantiagoIII; Joab T. SilvaII,+; Vânia Margaret F. PaschoalinII
In this study, three bacteria from a wastewater treatment system were isolated and sequenced, demonstrating high efficiency in degrading polycyclic aromatic hydrocarbons.
Bruna A. S. MachadoI,II,*; João H. O. ReisII; Jania B. da SilvaIII; Lindaiá S. CruzI; Itaciara L. NunesIV; Fabiano V. PereiraV; Janice I. DruzianII
Obtention of cellulose nanocrystals from coconut fiber by acidic hydrolysis (H2SO4 64% at 50°C). The nanocrystals were incorporated into a starch film solution to further obtain films with improved properties.
Rodrigo S. T. de Moura*; Yuri V. de A. Lopes; Gustavo G. Henry-Silva
A proportion of the nutrients used in cage fish farming is lost to the environment and their sedimentation rates must be known to enable appropriate management of the system and protection of water resources.
Adir H. Kalinke; Aldo J. G. Zarbin*
Glassy carbon electrodes modified with platinum nanoparticle/carbon nanotube nanocomposites exhibit high performance for the oxidation of methanol and ethanol.
Juan I. Sarmiento-SánchezI,*; Julio Montes-AvilaII; Adrián Ochoa-TeránIII; Francisco Delgado-VargasII; Victor Wilson-CorralI; Sylvia P. Díaz-CamachoII; Fernando García-PáezI; Pedro Bastidas-BastidasIV
In this work we reported the synthesis of benzoxazine-2,4-diones derivatives and their evaluation of antioxidant and antimicrobial activities.
Fauze A. AouadaI,*; Marcia R. de MouraI; Paulo R. G. FernandesII; Adley F. RubiraIII; Edvani C. MunizIII
The presence of LLC caused optical anisotropy in the polymeric hydrogels, a useful property for technological applications.
Mahmoud RoushaniI,*; Yar Mohammad BaghelaniI; Shahryar AbbasiI; Sayed Zia MohammadiII
A ligandless cloud point extraction procedure was developed for the separation and preconcentration of trace amounts of Pd(II) and Rh(III) ions in water samples using Span 80 prior to their determination by flame atomic absorption spectrometry.
Douglas A. C. Coledam; José M. Aquino; Romeu C. Rocha-Filho*; Nerilso Bocchi; Sonia R. Biaggio
For the degradation of the DB 22 dye (30 mA cm−2, 25 °C, and pH 7), COD removal is greatly accelerated in the presence of NaCl. In its absence, the β-PbO2 anode is more efficient for COD removal than the BDD anode, which suggests that distinct oxidation pathways take place on the surface of those anodes.
Harish Kumar SharmaI,*; Pernita DograI; Akhilesh Kumar GuptaI; Fardad KoohyarII
Scheme of nickel selective potentiometric cell assembly and calibration curve for Ni(II) obtained using a selective electrode based on Schiff's base.
Renato C. Silva; Karina A. Barros; Antonio C. Pavão*
Used to control the pest Guignardia citricicarpa (early blight), a common fungus in oranges. This study however, demonstrates its carcinogenic potential.
Mariane de A. Mancilha; Gabriela C. Guimarães; João Cláudio S. de C. Nardi; Jaine H. H. L. de Oliveira; Daniela B. Hirata*
Four different solvent mixtures were studied intended to increase the yield of the extraction stage of clavulanic acid from fermentation broth. Response surface methodology was used to optimize the liquid-liquid extraction.
Lenise G. de OliveiraI,*; Marcia H. S. KurzI; Fábio F. GonçalvesI; Fabiano BarretoII; Gabriel RübensamII; Rodrigo HoffII
Sedatives and beta blockers are used in swine to reduce stress during transport to the slaughterhouse. These residues can remain in foods. Therefore, the monitoring of these compounds should be performed to ensure food safety.
Mariana Consiglio Kasemodel; André Luiz Meleiro Porto; Marcia Nitschke*
A selected Pseudomonas aeruginosa strain was able to degrade DDD, dieldrin and PCP in liquid medium and the presence of rhamnolipid biosurfactant increased biodegradation of the organochlorides.
Wenhui Shi; Lin Yang; Quanjun Fu; Zhiye Zhang; Xinlong Wang*
Reverse-flow injection analysis system used for sulfate concentration determination in wet-process of phosphoric acid (WPA).
Said F. Figueredo*; Adolfo E. Ensuncho; Jesús M. López
Using a stochastic method, new conformations were found on the potential energy surface of formic acid dimers. B3LYP/6-311++G(3df,2p) calculations show strengthening or weakening of chemical bonds.
Frantiescoli A. DimerI,*; Maiara C. PigattoI; Adriana R. PohlmannI,II; Teresa Dalla CostaI; Silvia S. GuterresI
A method for determining olanzapine in rat plasma was developed. Low plasma sample volumes (100 µL) were used. The method was applied in the pharmacokinetic study of olanzapine nanocapsules.
Camila B. Nascimento; Fernando Macedo Jr.
Enokipodins A-J are attractive synthetic targets due to either their biological potential or their structural characteristics, particularly concerning to the presence of a benzylic quaternary center for which different synthetic approaches have been used.
Célia A. Alves*
The sea surface microlayer controls interactions between the ocean and the atmosphere. Organic material from seawater is directly introduced into the atmosphere by bubbles bursting at the sea surface, which affects biogeochemical processes and climate.
Deyvid G. M. Oliveira; Glademir Alvarenga; Carla W. Scheeren; Gilber R. Rosa*
Low-cost reactor-type "dip catalyst" developed and tested in Suzuki-Miyaura cross-coupling.
Hanieh MontaseriI,*; Habibollah KhajehsharifiI; Saeed YousefinejadII
The simultaneous determination of EP, UA, and AC is difficult due to spectral overlap in the ultraviolet region. Therefore, multivariate calibration methods were used for the construction of calibration sets.
Tiago Bueno MoraesI,*; Luiz Alberto ColnagoII
The aim of this paper was to present a simple and fast way of simulating Nuclear Magnetic Resonance signals using the Bloch equations. Through the formalism of sum of isochromats, simulations of Single Pulse, Inversion Recovery, Spin Echo and CPMG sequences are presented.
Paulo Cesar de Souza PereiraI; Camila Fabiano de FreitasI; Cristiane Santi ChavesI; Bianca Martins EstevãoI; Diogo Silva PellosiI; André Luiz TessaroII; Vagner Roberto BatistelaIII; Ieda Spacino ScarminioIV; Wilker CaetanoI; Noboru HiokaI,*
Using chemometric multivariate analysis methodology in the treatment of spectroscopic data it is possible to extract the maximum information from the experimental data, leading to an accurate determination of pKa values as well as simulation of the spectra of pure species.
Roselena S. Schuh#; Fernanda Bruxel#; Helder F. Teixeira*,#
On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
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