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...
Vitor Sueth-SantiagoI; Gustavo Peron Mendes-SilvaI; Débora Decoté-RicardoII; Marco Edilson Freire de LimaI,*
Curcumin, isolated from the dried rhizomes of Curcuma longa (Zingiberaceae), is a golden colored derivative present in turmeric. Since its structural elucidation, several studies have been published on the biological activities exhibited by curcumin, particularly its chemotherapeutic properties.
Seyed Mehdi SajjadiI,II; Mohammad HaghighiI,II,*; Farhad RahmaniI,II
Effect of ZrO2 precursor on product yield at different temperatures.
Ghodsi Mohammadi ZiaraniI,*; Masoumeh AziziI; Parvin HajiabbasiI; Alireza BadieiII
The Biginelli-type reaction between various aldehydes, acetophenones and urea in the presence of sulfonic acid functionalized silica (SBA-Pr-SO3H) under solvent-free conditions produced 4,6-diarylpyrimidin-2(1H)-ones derivatives at good yields.
Kassia dos SantosI,II; Heloisa N. da MottaI; Erick Amaral CamposIII; Joseane V. GulmineI; Marilda MunaroI,II,*
This work identified the inefficiency in the analytical methods presented in standards ABNT NBR 13882 and IEC 61619 in the insulating oil analysis, and highlights potential failures that generated discrepancies on quantification of polychlorinated biphenyls (PCBs).
Giovanni B. PaschoalI; Carmen M. O. MullerII; Gizilene M. CarvalhoIII; Cesar A. TischerI; Suzana MaliI,*
Raw oat hulls were bleached with peracetic acid and then submitted to acid hydrolysis resulting in nanofibrillated cellulose, which showed an aspect of interconnected webs of tiny nanofibers with diameters of 70-100 nm and lengths of several micrometers.
Leonardo A. AlvesI,II; Luciana M. BertiniI,II; Ayla Márcia C. BizerraI,III; Marcos Carlos de MattosI; Francisco José Q. MonteI; Telma L. G. LemosI,*
Several vegetables were evaluated as biocatalysts for the reduction of ketones. Z. officinale presented the best results with the formation of an alcohol configuration.
Carolina M. Santos*; Leandro Cardoso de Morais
The thermodynamic parameters obtained by thermogravimetry in inert and oxidizing atmosphere of dry orange peel were analyzed and compared in order to generate data for the discussion of potential applications of this material as a biofuel.
Mohammad RezaeeI,*; Reyhaneh ShadaniyanII; Majid Haji HosseiniI; Faezeh KhalilianII
A method for the determination of trace amounts of palladium was developed using homogeneous liquid-liquid microextraction via flotation assistance followed by graphite furnace atomic absorption spectrometry.
Kelly da S. Bezerra; Nelson R. Antoniosi Filho*
The content from the unsaponifiable fraction of different fats and oils used as feedstock for biodiesel production was determined. The separation and identification of free steroid present in these samples was performed by gas chromatography.
Rafael GarcíaI,*; Gabriela SotoI; Néstor EscalonaI; Catherine SepúlvedaI; María José OrellanaI; Natalia MoralesI; Ljubisa R. RadovicII,III, Robison Buitrago-SierraIV; Francisco Rodriguez-ReinosoIV; Antonio Sepúlveda-EscribanoIV
The lower diversity and concentration of oxygenated surface functional groups in the PSAC-He support led to higher methane conversion on Ni pine sawdust activated carbon catalyst, due to their high Ni dispersion.
Long JiaoI,*; Xiaofei WangI; Shan BingI; Zhiwei XueII; Hua LiIII
A QSPR study on the boiling point of PCDD/Fs based on the molecular distanceedge vector index was conducted. The boiling point of each PCDD/F congener was predicted by the established QSPR model.
Candelaria Leal MarchenaI,III; Silvina GomezI,III; Clara SauxI,III; Liliana B. PierellaI,III,#; Luis R. PizzioII,III,*
TPA immobilized over NH4ZSM5 zeolites were prepared by wet impregnation. Eg values of NH4ZSM5TPA samples were similar to those reported for TiO2 and irradiated NH4ZSM5TPA samples efficiently degraded methyl orange solutions.
Michelle MantovaniI; Erik Moda AguiarI; Wagner Alves CarvalhoI; Dalmo MandelliI; Maraisa GonçalvesI,II,*
Preparation of acid carbon from glycerin waste and its utilization as a catalyst for the production of oxygenated products from the etherification reaction.
Cristiane Barata-SilvaI,*; Tatyane P. dos SantosI; Adherlene V. GouvêaII; Ariane L. LarentisI; Josino C. MoreiraI; Paula N. SarcinelliI
This work aimed to adapt the analysis of methemoglobin recommended by Evelyn - Malloy (visible spectrophotometry), in order to facilitate its application in the field, or to analysis in clinical laboratory, of existing sites of diflubenzuron application.
Jane Raquel Silva de OliveiraI; Salete Linhares QueirozII,*
The importance and value of teaching scientific communication skills in undergraduate chemistry courses.
Roberta P. M. da CostaI; Thaiane C. KhalilI; Amanda P. F. dos SantosI; Débora F. de AndradeII,*,# e Luiz A. d'AvilaI,III
Color scale sample of biodiesel in diesel (B0 to B6), obtained by colorimetric assay for hydroxamic acid.
Paula Cristiana de FreitasI; Rui Miguel de CarvalhoII; Jessee Severo Azevedo SilvaII; Thiago PradoI; Elis Regina DuarteI; Vera L. A. FrescuraII; Eduardo S. ChavesI,*
Ultrasound-assisted extraction and iron colorimetric determination in soils: A comparison with ICP-MS.
Gilson A. HelferI,#,*;Fernanda BockI,#; Luciano MarderI,#; João C. FurtadoII,#; Adilson B. da CostaIII,#; Marco F. FerrãoIV
Chemostat: free exploratory multivariate data analysis software and web tool.
Helena S. A. Leite; Paulo A. Porto*
In the twentieth century, the periodic table was presented in general chemistry textbooks in different ways: from more descriptive approaches to emphasis on attempts to explain the periodic table in terms of atomic orbitals.
Fabrício G. Menezes; Ana C. O. Neves; Djalan F. de Lima; Sheeza D. Lourenço; Lilian C. da Silva; Kássio M. G. de Lima*
A proposal based on biochemical analyses by the enzymatic colorimetric method was found to be highly motivating for undergraduates because of the multidisciplinary theoretical context involved and the possibility of experimental activity.
Gonzalo A. Jaña; Wilson Cardona; Verónica A. Jiménez*
A tablet device was used to project digitally handwritten annotations to deliver instruction in undergraduate chemistry lectures.
Adriana MeloI; Marcela Seragiotto AmadeuI; Marcelo LancellottiI,II; Luciana Maria de HollandaI; Daisy MachadoI,*
On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
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