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...
Marcelo R. dos Santos; Helinando P. de Oliveira*
Interfacial polymerization represents a simple and low cost technique for the preparation of electromechanical actuators based on polypyrrole-carbon nanotubes composite.
Marcos V. LoreviceI,II; Marcia R. de MouraIII,*; Luiz H. C. MattosoII
Novel packagings produced with polysaccharides and papaya's puree, improved with chitosan nanoparticles. A way to decrease environmental impact caused by disposal packaging that are difficult to degrade.
Rodrigo A. L. SantosI; Carmen M. O. MullerI; Maria V. E. GrossmannI; Suzana MaliII,*; Fabio YamashitaI
Biodegradable films produced by blow-extrusion of starch, PBAT, and nanoclay. The blended materials were initially pelletized in a single-screw pilot extruder, followed by subsequent extrusion of the pellets to form films.
Wander Gustavo BoteroI,*; Shenia de Oliveira SouzaI; Oseas Silva SantosI; Luciana Camargo de OliveiraII; Cristine Bastos do AmaranteIII
The sediment humic substances showed influences the complexation of metals by influencing their bioavailability for the aquatic environment.
Rita de Cássia Superbi de SousaI,*; Jane Sélia dos Reis CoimbraII; Liliana de Luca Xavier AugustoI; Leomir Samuel Tormen ReisI
Steps for obtaining the adsorption isotherms of α-la in hydroxyapatite and their values of qm as a function of different pH and temperature values.
Lucia Pittol FirmeI,*; Felipe Carlos Alvarez VillanuevaI; Antonio Arnaldo RodellaII
The chemical kinetics of sugarcane filter cake (FC) organic matter degradation in soil with different levels of cadmium (Cd) contamination was studied by quantifying CO2 emitted during 72 days of incubation. The total CO2 emitted from FC decreased with Cd contamination.
Marcia Foster MeskoI,*; Isis Gonçalves TorallesI; Marcelo Guerreiro CrizelI; Vanize Caldeira CostaI; Natanael Rodrigo Xavier PiresII; Claudio Martin Pereira de PereiraI; Rochele Sogari PicolotoIII; Paola Azevedo MelloIII
A method based on microwave-induced combustion (MIC) was applied for decomposition of different edible seaweed for subsequent determination of bromine and iodine by inductively coupled plasma mass spectrometry (ICP-MS).
Anderson dos S. BarbosaI; Matheus Albuquerque de O. SilvaI; Nayara B. CarvalhoI; Silvana MattediII; Miguel Angel IglesiasII; Alini T. FricksI; Álvaro S. LimaI; Elton FranceschiI; Cleide M. F. SoaresI,*
Lipase from Burkholderia cepacia immobilized by encapsulation in silica matrix modified with protic ionic liquid and dried in pressurized media (aerogel) shows attractive potential for industrial applications in the hydrolysis of vegetable oils.
Darlisson de Alexandria SantosI; Péricles Barreto AlvesI,*; Emmanoel Vilaça CostaI; Clovis Roberto Pereira FrancoII; Angelita NepelIII; Andersson BarisonIII
Sulcatyl acetate (6-methyl-5-hepten-2-yl acetate) was isolated for the first time from Aristilochia trilobata and identified as the major component of volatile compounds.
Marcelo Clemente*; Roberta J. Rocha; Koshun Iha; José A. F. F. Rocco
Polyurethane pre-polymer technology applied in the aerospace area. Used as a binder like a solid fuel in hybrid propulsion. Soybean-based polyol was the best starting raw material in the synthesis of polyurethane network.
Letícia Silotti ZampirolliI; Marcela Jacques de LemosI; Vinícius Tomaz GonçalvesI,II; Marco Andre Alves de SouzaI; Sonia Regina de SouzaI; Victor Marcos RumjanekI; João Batista Neves DaCostaI,*
This figure shows the growth inhibition of Rhizoctonia solani by phosphorohydrazidic acid N'-[1,2-dihydro-1-methyl-2-oxo-3H-indol-3-ylidene]-dibutyl ester (12).
Andréia P. G. Härter; Mariana H. Motta; Júlia G. de Barros; Roseane F. Ribeiro; Andréa I. H. Adams; Scheila R. Schaffazick; Cristiane de B. da Silva*
In this work, a rapid and simple HPLC method has been developed and validated for the assay of tioconazol in polymeric nanocapsule suspensions. The method showed good results with respect to specificity, linearity, precision, accuracy, and robustness.
Hudson C. PoloniniI; Rosângela S. LopesII; Adilson BeatrizII; Roberto S. GomesII; Adriano O. SilvaII; Ricardo V. de LimaII; Gláucia. A. NunesII; Marcos Antônio F. BrandãoI; Nádia R. B. RaposoI; Dênis P. de LimaII,*
Compounds 4, 5, and 7 showed the best protection against UVB sunrays, while compounds 5, 6, and 7 presented the best results for protection from UVA, so compound 7 had the most balanced protection.
Pedro Henrique Jataí BatistaI; José Roberto M. de AndradeI; Taynara Simão MatosI; Thiciana da Silva SousaI; Francisco das Chagas L. PintoI; Edilberto Rocha SilveiraI; Maria Iracema B. LoiolaII; Otilia D. Loiola PessoaI,*
Eight compounds, including terpenoids (jatrophone, hydroxyjatrophone, 6-hydroxycyperene, cabraleadiol monoacetyl, and cabraleadiol) and coumarins (fraxetin, fraxidin, and isofraxidin), were isolated from Jatropha ribifolia (Euphorbiaceae).
Luciana M. RavagliaI; Kerolayne GonçalvesI; Nathália Mitsuko OyamaI; Roberta Gomes CoelhoI; Adriano A. SpielmannII; Neli K. HondaI,*
Extracts of lichens collected from Brazil and Antarctica were evaluated for their 2,2'-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging activity and for their toxicity in Artemia salina bioassay. The composition of the extracts was determined using TLC and NMR, leading to the identification of nine compounds.
Jaqueline M. R. da Silva; Maria da Graça Nascimento*
Lipases from various sources were immobilized in agar gel and the system used as a catalyst in the chemo-enzymatic epoxidation of β-caryophyllene under mild reaction.
Caroline da Costa Silva Gonçalves; Anita Jocelyne Marsaioli*
Latent fluorogenic probes are chemical tools for the detection and understanding of enzymatic activities, providing real-time clues about complex biological processes.
Ricardo A. G. de OliveiraI; Thalita B. ZanoniII; Guilherme G. BessegatoI; Danielle P. OliveiraII; Gisela A. UmbuzeiroIII; Maria Valnice B. ZanoniI,*
Reaction using the primary intermediate (p-phenyldiamine) and the coupler (resorcinol) in the presence of hydrogen peroxide, resulting in the formation of the dye Idoaniline, of red color.
Carla Grazieli Azevedo da Silva*; Carol H. Collins
Separations using super/subcritical fluid chromatography (SFC) with packed columns have been re-discovered and explored in recent years. SFC with the use of CO2 and modifiers (5-50%) have been providing fast, efficient and greener separations.
João P. GobboI; Dalva L. A. de FariaI,*; José R. MartinelliII
The immobilization of heavy-metal wastes in iron phosphate glass decreases their release rate into the environment and constitutes an option for the management of hazardous metal residues produced on a small scale.
Marcelle M. BonatoI; Mariana O. G. P. BragançaII; Kleber F. PortellaII,*; Mateus E. VieiraI; Eliseu EsmanhotoII; Dailton P. CerqueiraIII; Jeannette C. M. dos SantosIII
Photocatalytic decomposition of NOx pollutants by mortars containing TiO2 nanoparticles.
Gabriela Martins Silva de Lima; Roberta Zilles Hahn; Cristina Rama; Liliane Rhoden; Paulina Hidalgo; Cleber Álvares da Silva; Marina Venzon Antunes; Rafael Linden*
The antiepileptic drugs phenobarbital, phenytoin and carbamazepina were extracted from a single blood spot on paper and simultaneously determined by HPLC-DAD
Nyuara Araújo da Silva Mesquita*; Márlon Herbert Flora Barbosa Soares
The improvement in chemistry teacher training involves discussions that interrelate educational policies, supervised stage, and chemistry teaching in undergraduate courses in Brazilian context.
José Augusto Fragale Baio; Luiz Antônio Ramos; Éder Tadeu Gomes Cavalheiro*
Voltammetric electrodes were prepared using recycled graphite obtained from exhausted commercial 1.5 V batteries and its application in electroanalysis with didactic purposes is described in several simple laboratory experiments.
Rita C. C. DuarteI; Maria Gabriela T. C. RibeiroI,*; Adélio A. S. C. MachadoII
The separate evaluation of the steps of the synthesis (reaction, isolation and purification) for several protocols with the green star (GS) allows reaching an optimized protocol from information on the greenness of each step.
Adélio A. S. C. Machado*
A battery of three hierachized metrics (atomic economy, AE, reaction mass efficiency, RME, and mass intensity, MI) is presented for evaluation of the material greenness of synthesis reactions, which involves two components: AE and RME evaluate the atomic greenness (incorporation in the product of the atoms from reagents) and MI evaluates the global massic greenness.
On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
Publicações da Sociedade Brasileira de Química
Caixa Postal: 26037 05513-970 São Paulo - SP