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...
Renata S. Magalhães1,*; Wagner D. M. Junior1; Agda E. Souza1; Silvio R. Teixeira1; Máximo S. Li2; Elson Longo3
BT tetragonal and cubic ST were synthesized using MAH method. BA / Sr chlorides and Anatase-H2O2 were used as metal precursors in an alkaline medium. The photoluminescent behaviors of BT and ST were evaluated according to the KOH concentration.
Karine L. Macagnan1; Amanda A. Rodrigues1; Mariane I. Alves2; Lígia Furlan2; Sônia M. Kesserlingh3; Andréa B. Moura4; Patrícia D. de Oliveira1; Alan J. A. McBride1; Angelita da S. Moreira1,2,*; Claire T. Vendruscolo1,2
The following parameters were improved in the P(3HB) recovery method: cell concentration, heating time, solvent ratio and separation of cell residue (filtration - conventional method or liquid-liquid separation by polarity difference - new method).
Yomaira L. Uscategui; Luis E. Díaz; Manuel F. Valero*
An evaluation of microbiological degradation, in vitro cytotoxicity and antimicrobial activity was performed on Polyurethanes synthesized from castor oil (with and without chemical modification) and isophorone diisocyanate (IPDI).
Juliana R. Gubiani1; Helder L. Teles2; Geraldo H. Silva3; Maria Cláudia M. Young4; José O. Pereira5; Vanderlan S. Bolzani1; Angela R. Araujo1,*
An endophytic fungus A. versicolor isolated from the leaves of P. aduncum was used to produce six known compounds: three peptide derivatives, one adenine derivative, one phtalide derivative and one benzoic acid derivative.
Nazeran Idrees1,*; Muhammad Nawaz Naeem1; Fida Hussain1; Afshan Sadiq2; Muhammad Kamran Siddiqui3
The figure shows zigzag benzenoid system all of whose vertices have degree either two or three, different variants of Zagreb indices of the benzenoid system are computed which mainly depend on the degrees of vertices of the system.
Roberta Jachura Rocha*; José Atílio Fritz Fidel Rocco; Maria Auxiliadora Silva de Oliveira; Koshun Iha
Equipment coated with the high layer coating obtained in the reaction of modified novolac epoxy.
Breno N. Matos; Larissa M. A. Melo; Maíra N. Pereira; Thaiene A. Reis; Marcílio Cunha-Filho; Taís Gratieri; Guilherme M. Gelfuso*
Iontophoresis presents MXS targeting potential to hair follicles; however, it is incapable of preventing dermal exposure. The passive application of MXS-loaded chitosan nanoparticles remains the best way to target MXS to the hair follicles while avoiding possible side effects.
Marilda Chiarello1; Roberta Neimaier Graeff2; Luciane Minetto1; Gisele Cemin2; Vania E. Schneider2; Sidnei Moura1,*
Determination of pesticides in surface water and sediment, based on solid phase extraction and QuEChERS, analyzed by liquid chromatography and high resolution mass spectrometry.
Darlan C. dos Santos1,2; Jorge Mauricio David2,*; Juceni Pereira David3
Saturated hydrocarbons, methyl cinnamate, sitosterol cinnamate and ananixanthone were isolated from the brown propolis (classified as Propolis Type 6). The extracts showed toxicity in the brine shrimp test.
Amira Arciniegas; Ana L. Pérez-Castorena*; Antonio Nieto-Camacho; Yuko Kita; Alfonso Romo de Vivar
The acetone extracts of S. acuta and S. rhombifolia inhibited yeast α-glucosidase (IC50 8.49 ± 0.66 and 8.10 ± 0.34 µg mL-1, respectively) and showed mild activity on DPPH and TPA tests. Among the isolated compounds 5 was active in all evaluations.
Cristian Andres Narváez1; Claudia Fernanda Villaquirán Raigoza1,*; Aida Patricia González Nieva2
BiFeO3 exhibits anti-ferromagnetic order within distorted rhombohedrally perovskite structure.Among the possible strategies, substitution of the A and/or B site by rare earth or transition metal elements has been proposed in order to suppress formation of secondary phases and to induce ferromagnetism.
The graphical abstract shows the main problems related with the analysis of volatyle methylsiloxanes (VMS): background contamination and vaporization losses, and the techniques commonly used for their analysis. The chemical structures of some VMS are also shown.
Andressa V. Müller; Márcia R. Gonçalves; Luiz D. Ramos; André S. Polo#; Karina P. M. Frin*
The progresses and challenges of some coordination compounds based on Ru(II), Re(I) and Ir(III) for biomolecules photosensors, electroluminescent devices or CO2 photoreduction catalysts are reviewed and correlated to their photochemical and photophysical properties.
Cláudia R. Martins; Patrícia B. Di Vitta; Liliana Marzorati; Cláudio Di Vitta*
Ecosolvent® software was used to estimate the environmental impacts for the recovering of some solvents from waste, by distillation, or for the complete incineration of the mixture. In our case, recovering showed to be less impacting than incineration.
Camila G. Passos*; José C. Del Pino
This figure illustrates the interrelationship between the epistemological conceptions and didactic models used by teachers to be able to analyze the professional development process.
Renata S. Amais1; Fábio R. P. Rocha1,*; Joaquim A. Nóbrega2
Illustration of the measurement of analytical signal with (a) and without (b) an intense background signal. As well as illumination by the candles is more visible in dark, measurement of analytical signals is feasible without intense background, thus yielding lower detection limits.
Valmir B. Silva; Elisa S. Orth*
A homemade colorimeter was constructed and used in a physical organic chemical study in order to study the substituent effect in a nucleophilic catalytic acyl transfer reaction.
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