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Autores: A partir do fascículo 39/9 a revista Química Nova adotou a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.

Edição Atual vol. 42, No. 8, 2019, p. 823-989

 

Submission procedures for OPEN ACCESS

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...



Artigo de Capa
Quim. Nova 2019, 42(8), 900-919

Química do lúpulo

Renato S. Durello; Lucas M. Silva; Stanislau Bogusz Jr*

In this scientific paper we present a critical and comprehensive review about hop chemistry and their role in the brewing process.

http://dx.doi.org/10.21577/0100-4042.20170412

Publicado online: setembro 11, 2019
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Artigos Quim. Nova 2019, 42(8), 823-830

 

Avaliação do perfil de liberação do fármaco ibuprofeno em membranas simétricas e assimétricas de acetato de celulose: efeito da morfologia

Marcos V. FerreiraI; Lauro A. Pradela FilhoI; André L. dos SantosaII; Regina M. TakeuchiaII; Rosana M. N. de AssunçãoI,II,*


Cellulose acetate (CA) membranes with different morphologies - symmetric and asymmetric - were loaded with ibuprofen (IBF) and showed the effect of morphology on the drug releasing curves. These curves were directly obtained by square-wave voltammetry (SWV) measurements.

http://dx.doi.org/10.21577/0100-4042.20170409

Publicado online: setembro 11, 2019
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Quim. Nova 2019, 42(8), 831-837

 

Efeito do PH, espécie e concentração iônica na absorção de água de hidrogéis bionanocompósitos constituídos de CMC/PAAm/laponita RDS

João A. F. Garcia; Márcia R. de Moura; Fauze A. Aouada*,**


This paper presents the detailed study of the effects of pH, intensity and ionic species on the mechanism of water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose and laponite nanoclay.

http://dx.doi.org/10.21577/0100-4042.20170396

Publicado online: agosto 20, 2019
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Quim. Nova 2019, 42(8), 838-844

 

Theoretical studies on the new high-nitrogen explosives n14 and n18

Jifeng ChenI; Yi YuII; Yuchuan LiI,*; Siping PangI,#


Two novel explosives have an excellent power, and their detonation performance are all comparable to CL-20. Besides, their impact sensitivities are slightly better than CL-20, therefore they are promising candidates in energetic materials.

http://dx.doi.org/10.21577/0100-4042.20170408

Publicado online: agosto 30, 2019
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Quim. Nova 2019, 42(8), 845-850

 

Desenvolvimento de metodologia de revelação de impressão digital latente com chalconas

Jaqueline D. BalsanI; Bruno N. RosaI; Claudio M. P. PereiraI,II; Clarissa M. M. SantosI,*


The synthesized chalcones represent as promising and new class of latent fingerprint powder developers as alternative and ecologically correct.

http://dx.doi.org/10.21577/0100-4042.20170399

Publicado online: agosto 26, 2019
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Quim. Nova 2019, 42(8), 851-858

 

Synthesis of mesoporous γ-alumina and its catalytic performance in dichloropropanol cyclization

Huimin Yang; Ruyue Hana; Fuxiang Li*


Use KH560-540 as a template to synthesize mesoporous alumina, before the calcination, the methoxy group at the end of the template molecule is hydrolyzed to form a siloxy group, which combines with the aluminumoxy group produced by hydrolysis of aluminum source.

http://dx.doi.org/10.21577/0100-4042.20170404

Publicado online: agosto 30, 2019
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Quim. Nova 2019, 42(8), 859-865

 

Hdl-particles separation employing different precipitating agents: functional properties of the impact of chemical precipitation on lipoprotein particle-size and paraoxonase-1-activity

Vanessa R. A. e SilvaI; Elaine C. AlbuquerqueIII; Ana Paula C. dos SantosI,II; Julio C. A. SantosI; Lazaro S. S. JuniorI,II; William A. PresadaVI; Carmen G. C. de M. VinagreIV,X; Ricardo D. CoutoI,IV,*


Three different precipitating solutions were tested for HDL particle-size determination: polyethylene glycol (PEG) 8000 (200 g L-1) (P1); phosphotungstic acid-Ca+2 (3 g L-1) (P2); and dextran sulfate/MgCl2 (15 g L-1) (P3).

http://dx.doi.org/10.21577/0100-4042.20170410

Publicado online: setembro 11, 2019
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Quim. Nova 2019, 42(8), 866-873

 

Foodômica por RMN de 1H para monitoramento da estabilidade oxidativa de margarinas submetidas ao tratamento térmico

Vinícius S. Pinto*; Anna K. Nery; Luciano M. Lião


Use of NMR and PCA in the identification of oxidation products in brazilian margarines subjected to thermal stress.

http://dx.doi.org/10.21577/0100-4042.20170397

Publicado online: agosto 20, 2019
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Quim. Nova 2019, 42(8), 874-884

 

Análises melissopalinológicas, físico-químicas, atividade antirradicalar e perfil químico por UPLC-DAD-qTOF-MS/MS dos méis de Frieseomelitta doederleini (abelha branca): comparação com os fenólicos presentes nas flores de Mimosa tenuiflora (jurema preta)

Rogelio M. SantistebanI; Sonia P. CabreraI; José F. NetoII; Eva M. S. SilvaII; Rebert C. CorreiaIII; Rodolfo F. AlvesIV; Francisco de A. R. dos SantosIV; Celso A. CamaraI; Tania M. S. SilvaI,*


Frieseomelitta doederleini (abelha branca) bee nest. ESI base peak ion (BPI) chromatogram of phenolics extracted from Frieseomelitta doederleini honey bee and analyzed by UPLC-QTOF-MS.

http://dx.doi.org/10.21577/0100-4042.20170407

Publicado online: agosto 30, 2019
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Quim. Nova 2019, 42(8), 885-890

 

Estudo eletrônico da reatividade da 8-hidroxiquinolina substituída frente ao sítio de ligação do peptídeo β-amiloide ao íon zinco

Talis U. Silva; Sérgio de Paula Machado*


Removing process Zn2+ in Aβ peptide bind site: interaction of 8-HQ derivative HOMO orbital with ZnAβ site LUMO orbital.

http://dx.doi.org/10.21577/0100-4042.20170411

Publicado online: setembro 11, 2019
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Revisao Quim. Nova 2019, 42(8), 891-899

 

Biorremediação de efluentes por meio da aplicação de microalgas - uma revisão

Guilherme DiasI; Matheus HipólitoII; Fernando SantosI,*; Rogério LouregaII; Jaqueline de MattiaI; Paulo EichlerII; Jonathan AlvesI


Bioremediation of industrial effluent using microalgae.

http://dx.doi.org/10.21577/0100-4042.20170393

Publicado online: agosto 1, 2019
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Nota Técnica Quim. Nova 2019, 42(8), 920-927

 

Desenvolvimento e validação de método para determinação de bisfenol a e etinilestradiol em aguapé e mini-papiro provenientes de wetlands construídas

Julyenne M. CamposI,*; Denis M. RostonI; Sonia C. N. QueirozII,#


Analysis of bisphenol A (BPA) and ethinylestradiol (EE2) in Dwarf papyrus and Water hyacinth by high performance liquid chromatography (HPLC) coupled to fluorescence detector (FL).

http://dx.doi.org/10.21577/0100-4042.20170402

Publicado online: agosto 30, 2019
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Quim. Nova 2019, 42(8), 928-931

 

Water versus lactose solution as a dispersion medium for particle analysis in sweetened condensed milk by laser diffraction

João Pablo F. PereiraI,*; Igor L. de PaulaII; Rodrigo StephaniII; Ítalo T. PerroneIII; Luiz Fernando C. de OliveiraII; Antonio F. de CarvalhoI


The sweetened condensed milks were analyzed by microscopy (usual method) and by laser particle size analysis using two different dispersion media (water and a lactose solution) and different solubilization times to seek the characterization of the samples using the laser scattering.

http://dx.doi.org/10.21577/0100-4042.20170406

Publicado online: agosto 30, 2019
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Educaçao Quim. Nova 2019, 42(8), 932-939

 

Cambio en los modelos conceptuales escolares sobre la interacción materia y energía en un entorno ciencia tecnología sociedad y ambiente

John J. Bermúdez LoaizaI; Francisco J. Ruiz OrtegaII,#; Milton Rosero-MoreanoI,*


The matter and energy interaction, used as didactic mediation in the high school learning could promote the better acquisition level of knowledge among the students by facilitating the spectroscopy understanding within a Science, Technology, Environment and Society pedagogical framework.

http://dx.doi.org/10.21577/0100-4042.20170394

Publicado online: agosto 7, 2019
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Quim. Nova 2019, 42(8), 940-946

 

Revisiting the nucleophilicity concept in a comprehensive biomass valorization experiment: from papaya seeds to thiourea motifs

Raquel V. dos SantosI; Gil M. VianaII; Anderson Felipe S. MoreiraIII; Vitor S. NóbregaIII; Vitor A. S. da SilvaIII; Luiz Fernando B. MaltaIII,*; Lucia C. S. AguiarIII; Jaqueline D. SenraI


The use of raw material from papaya seeds was introduced as a strategy to attract the students' attention towards the biomass valorization while acquiring knowledge in research skills in the context of nucleophilic addition reactions.

http://dx.doi.org/10.21577/0100-4042.20170395

Publicado online: agosto 7, 2019
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Quim. Nova 2019, 42(8), 947-954

 

Proposições didáticas para o formador químico: a importância do triplete químico, da linguagem e da experimentação investigativa na formação docente em química

Roseli P. SchnetzlerI; Thiago Antunes-SouzaII,*


Pedagogical Practices based on: i) the articulation of the three levels of chemical knowledge, ii) the importance of verbal language in chemistry teaching-learning processes and iii) the role of investigative experiments for exploring students' ideas.

http://dx.doi.org/10.21577/0100-4042.20170401

Publicado online: agosto 30, 2019
PDF
Quim. Nova 2019, 42(8), 955-961

 

El dopaje deportivo como cuestión socialmente viva: una revisión bibliográfica

Yair Alexander Porras-ContrerasI,*; Juan Antonio Torres-ArangurenII


The aim of this study is to analyze the concept of Sports Doping in a sample of scientific journals, published during the period 2008-2018, in order to recognize its scope in the educational field.

http://dx.doi.org/10.21577/0100-4042.20170398

Publicado online: agosto 26, 2019
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Quim. Nova 2019, 42(8), 962-970

 

Aplicação de condimentos na revelação de impressões digitais latentes: um experimento no ensino de química

Caroline NicolodiI; Bruno Nunes da RosaI; Caroline Carapina da SilvaI; Lucas Moraes BerneiraI; Bruna S. PachecoI; Tais PolettiI; Dalila VenzkeI; Kristiane C. MariottiII,III; Claudio M. P. PereiraI,III,*


This paper showed an experimental methodology for the extraction and chromatographic analysis of food spices and the possibility of applying them as latent fingermarks developers. This procedure can be successfully applied in undergraduate chemistry classes.

http://dx.doi.org/10.21577/0100-4042.20170405

Publicado online: agosto 30, 2019
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Quim. Nova 2019, 42(8), 971-982

 

O desafio na escolha dos solventes em síntese - o workup como exemplo

José Ricardo M. Pinto#; Maria Gabriela T. C. Ribeiro*,#; Adélio A. S. C. Machado


Assessing the substitution of solvents in synthesis with respect to the their intrinsic greenness and their influence on the chemical reaction greenness.

http://dx.doi.org/10.21577/0100-4042.20170400

Publicado online: agosto 26, 2019
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Quim. Nova 2019, 42(8), 983-989

 

Students building didactic experiments as a tool for teaching unit operations and process control for chemistry technicians

Rodrigo Battisti*; Graziele V. B. Possenti; Ana Paula Figueiredo; Marcelo Dal Bó


Heat exchanger; Adsorption; Humidification; Drying; Planning; Building; Experiment.

http://dx.doi.org/10.21577/0100-4042.20170403

Publicado online: agosto 30, 2019
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