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...
Renan C. F. LeitãoI; Cícero P. de MouraII; Lindomar R. D. da SilvaIII; Nágila M. P. S. RicardoIII; Judith P. A. FeitosaIII; Edvani C. MunizIV; André R. FajardoIV,V,*; Francisco H. A. RodriguesI,IV
A novel superabsorbent hydrogel composite based on a poly(acrylamide-coacrylate) matrix filled with nontronite with highly attractive swelling properties and potential uses in agriculture was designed and characterized in this manuscript.
Xiaoyan Wang; Gan Jia; Yuting Yu, Yanfang Gao*; Wen Zhang; Hong Wang; Zhenzhu Cao; Jinrong Liu
Dimethyl carbonate (DMC) is viewed as an environmentally benign intermediate because of its negligible eco-toxicity and its versatile chemical applications. In this paper, a novel homogeneous electrocatalyst based on Cu(Phen)Cl2 was used for electrocatalytic oxidative carbonylation of methanol to DMC.
Monna Lisa B. QueirozI; Rachel Freire BoaventuraI; Micael Nunes MeloI; Heiddy M. AlvarezII; Cleide M. F. SoaresI; Álvaro S. LimaI; Montserrat F. HerediaI; Cláudio DarivaI; Alini T. FricksI,*
Complete transesterification of soybean oil catalyzed by Novozyme 435 under microwave.
Benjamim H. de Lima SilvaI,*; Marcos A. Bezerra de MeloII
A simulation between trichloromethane and alanine was performed investigating amino acid changes that may arise in protein and possibly induce the formation of cancer.
Élcio J. BunhakI,*; Elisabete S. MendesI; Nehemias C. PereiraII; Edgardo A. G. PinedaIII; Ana A. W. HechenleitnerIII; Osvaldo A. CavalcantiIV
The physicochemical and surface analyses of free films are important tools for research and the development of new materials for coating of solid dosage forms to control drug delivery.
Joselaine C. SantanaI; Sanny W. M. MachadoI; Marcelo J. B. SouzaII; Anne M. Garrido PedrosaI,*
The figure shows that the parameters total area, crystallite size of the microporous phase and the mesoporous parameter value are dependent on the alkaline treatment carried out on different hybrid materials and indicate the different contributions of micro- and mesoporosity in these materials.
Luciane PierezanI; Márcia Regina Pereira CabralI; Deluana Martins NetoI; Jusinei Meireles StropaI,II; Lincoln Carlos Silva de OliveiraII; Dilamara Riva ScharfIII; Edésio Luiz SimionattoIII; Rogério César de Lara da SilvaI; Euclésio SimionattoI,*
Chemical composition and thermal behavior was reviewed in mixtures of four esters obtained from vegetable oils.
Pedro L. R. da CruzI; Leila R. GiarolaII; Suellen da Silva MoraesI; Déborah Ellen S. G. da SilvaI; Joelma MarconIII; João L. AzevedoIII; Welington L. AraújoIV; Luciana G. de OliveiraIII,*
A molecular fingerprint approach was employed to evaluate the biosynthetic potential of endophytic actinobacteria from Citrus reticulata in the production of PKs and NRPs metabolites.
José Francirlei de OliveiraI; Michel BrossardII; Edemar Joaquim CorazzaIII; Robélio Leandro MarchãoIV; Pedro Rodolfo Siqueira VendrameV; Osmar Rodrigues BritoI; Maria de Fátima GuimarãesI,*
Understanding the interrelations between P content, extraction method and their effect on prediction by Vis-Nir spectroscopy.
Vanessa Cristina dos Santos Peixoto de Oliveira*; Maria Inês Bruno Tavares; Eduardo Miguez Bastos da Silva; Bianca Natividade Barreto de Lima; Roberto Pinto Cucinelli Neto
The evaluation of thermal treatment of Origanum vulgare using the domain curves of proton spin-lattice relaxation time, which discloses the structural changes or degradation process occurring in the sample when it is submitted to thermal treatment.
Cristiano L. ChostakI,II; Mônica S. de CamposI; Simone B. da SilvaI; Gilberto AbateI; Marco T. GrassiI,*
Alternative DGT devices prepared using montmorillonite MT-K10 as the ligand phase and agarose as the diffusive phase, for the speciation of trace metals in natural waters.
Aline Matuella Moreira Ficanha; Nádia Ligianara D. Nyari; Katarine Levandoski; Marcelo Luis Mignoni*; Rogério Marcos Dallago
Matrix sol-gel production created by partial hydrolysis of the precursor (TEOS) results in an oligomer. This is completely hydrolyzed and forms a colloidal dispersion (sol) which upon addition of the enzyme starts the process of polycondensation. The end of the process results in an immobilized enzyme.
Evelyn Maribel Condori Peñaloza#; Samuel Kaiser#; Pedro Ernesto de Resende#; Vanessa Pittol#; Ânderson Ramos Carvalho#; George González Ortega#,*
No clear correlation between chemical composition and geographic origin, altitude or season of collection was found. Nevertheless, three chemotypes were distinguished based on the oxindole alkaloid profile of the cat's claw samples.
Shakeel Ahmed AnsariI,*; Rukhsana SatarII; Syed Kashif ZaidiI
Attachment of β-galactosidase on carboxylated AgNPs.
Marcela Fernandes SilvaI,*; Edgardo Alfonso Gómez PinedaII; Rosangela BergamascoI
The use of iron oxides as adsorbent and photocatalyst for the removal or degradation of pollutants has proved a promising approach. The separation and reuse of iron oxides is very simple, effective and economical while also being more environmentally friendly.
Nayara B. Carvalho; Álvaro S. Lima; Cleide M. F. Soares*
Strategies for surface modification of supports using different additives for lipase immobilization in order to replace conventional immobilization methods and improve biocatalyst efficiency.
Daniele KasperI,*; Bruce R. ForsbergI; Ronaldo de AlmeidaII; Wanderley R. BastosIII; Olaf MalmIV
Analysis of mercury in water is a challenge because of its low levels. Sample preservation methods and protocols that avoid contamination are discussed for the most commonly evaluated mercury species.
Luciane Miranda*; Maria L. Felsner; Yohandra R. Torres; Ivonete Hoss; Andressa Galli; Sueli P. Quináia
This study presents the in-house validation of a new voltammetric methodology for 17α-MT analysis in natural water. The methodology exhibited selectivity, linearity, accuracy and precision.
Esmeraldo A. Cappelaro; Janete H. Yariwake*
This paper describes the identification of volatile and semi-volatile compounds and a comparison of the HS-SPME-GC-MS chromatographic profiles of dried leaves of Mikania glomerata Sprengel (Asteraceae), also known in Brazil as "guaco".
Khallil Hassan Ahmad Ali FernandesI; João Paulo Tenório da Silva SantosII; Vinicius Del ColleII; Janaina Souza-GarciaI; Camilo Andrea AngelucciI,*
Cyclic voltammogram profile of platinum in acid media obtained by Staircase Sweep Voltammetry (SCV). The data displays the current recorded at different periods during each step comprising the SCV signal.
Martin Wallau*; Daniela Bianchini; Camila Porto Ebersol; José Augusto dos Santos Júnior; Thiago Marques Barboza
Chlorine, the only element which appears greenish, is presented as one of the fundamental but also most criticised industrially used chemicals. By miniaturised experiments, chlorine´s applications and properties can be easily demonstrated.
José G. Cermeños-EstradaI; John J. Pérez-MoncadaI; Daniel BarragánI,II,*
Steric effects or steric hindrance can be explained to freshman students clearly by using correlations between properties of molecules and the energy barrier height of series of SN2 reactions.
Fernando Arruda Mendes de OliveiraI,II; Eduardo Ribeiro de AzevedoI,*; Luiz Antonio de Oliveira NunesI
Picture of the light intensity acquisition apparatus developed including: the electronic control circuit, linear diode array and software graphics interface with a Hg lamp spectrum displayed.
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