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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. 1, 2019, p. 1-127

 

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(1), 71-83

AVANÇOS RECENTES EM BIOSSÍNTESE COMBINATÓRIA DE POLICETÍDEOS: PERSPECTIVAS E DESAFIOS

Bruno S. Paulo; Renata Sigrist; Luciana G. de Oliveira

Prospects in genetic engineering of enzymes, modules and domains from polyketides megasynthases results in structural diversity on natural products.

http://dx.doi.org/10.21577/0100-4042.20170307

Publicado online: novembro 7, 2018
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Artigos Quim. Nova 2019, 42(1), 1-9

 

EQUAÇÕES LINEARES E NÃO LINEARES PARA PREVER O COMPORTAMENTO DE PROPRIEDADES FÍSICO-QUÍMICAS DE COMBUSTÍVEL DE AVIAÇÃO MISTURADO COM BIOQUEROSENE DROP-IN ALTERNATIVO

Bruno K. V. Iha; Leila Ribeiro dos Santos; Lenilson Afonso dos Santos; Maria Esther Sbampato; José A. F. F. Rocco


The graph shown in the figure is inserted in the context of the article, the graph represents the path traveled by green aircraft that cares about the environment, driven by a drop-in biofuel. The aircraft is crossing a sea of biokerosene.

http://dx.doi.org/10.21577/0100-4042.20170302

Publicado online: outubro 31, 2018
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Quim. Nova 2019, 42(1), 10-16

 

PRÉ-CONCENTRAÇÃO BASEADA NA COPRECIPITAÇÃO USANDO CROMATO DE PRATA COMO CARREADOR PARA DETERMINAÇÃO DE COBRE POR FAAS

Ivero P. Sá; Luana N. Santos; Erik G. P. da Silva; Daniel de C. Lima; Fábio Alan C. Amorim


• Multivariate optimization of analytical methods.
• Silver chromate as coprecipitant copper separation and preconcentration.
• Determination of copper in water samples by FAAS.

http://dx.doi.org/10.21577/0100-4042.20170314

Publicado online: novembro 29, 2018
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Quim. Nova 2019, 42(1), 17-21

 

DETERMINATION OF ANTIOXIDANT POTENTIAL AND QUANTITATION OF PHENOLIC COMPOUNDS BY HPLC IN ACCESSION OF Capsicum baccatum var. pendulum

Maria Lucy de Assis; Marco Antônio G. B. Gomes; Larissa L. da Cruz; Michel de S. Passos; Silvia M. F. Pereira; Mariana B. S. Arantes; Daniela B. Oliveira; Ivo J. C.Vieira


Compounds from the ethanolic extract of pepper fruit Capsicum baccatum var. pendulum identified by High-Performance Liquid Chromatography (HPLC).

http://dx.doi.org/10.21577/0100-4042.20170294

Publicado online: setembro 27, 2018
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Quim. Nova 2019, 42(1), 22-27

 

THEORETICAL STUDIES ON TRIACETONETRIPEROXIDE (TATP) DERIVATIVES TO IMPROVE THEIR PERFORMANCE

Zongcheng Miao; Faan Li; Yi Luan


Stability and detonation performance of derivatives of Triacetonetriperoxide were investigated. Results show that TATPNO2 is a candidate of novel high energy density materials.

http://dx.doi.org/10.21577/0100-4042.20170295

Publicado online: setembro 27, 2018
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Quim. Nova 2019, 42(1), 28-35

 

AVALIAÇÃO ESPACIAL E SAZONAL DAS CONCENTRAÇÕES DE PARTÍCULAS TOTAIS EM SUSPENSÃO E ELEMENTOS METÁLICOS ASSOCIADOS NO AR DE UMA CIDADE DO SUDESTE BRASILEIRO

Gabriel P. Machado; Renato I. S. Alves; Ana Paula M. S. Senhuk; Brisa M. Fregonesi; Guilherme S. Zagui; Martí Nadal; Jordi Sierra; Josep L. Domingo; Susana I. Segura-Muñoz


This study evaluated the concentrations of TSP and metals in the air of Ribeirão Preto city. Spatial differences were found between some metals, but seasonal differences were found between TSP and the most of the elements.

http://dx.doi.org/10.21577/0100-4042.20170297

Publicado online: outubro 17, 2018
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Quim. Nova 2019, 42(1), 36-41

 

DEVELOPMENT OF CLOUD POINT EXTRACTION-SCANOMETRY, FOR THE PRECONCENTRATION AND DETERMINATION OF COLORLESS SPECIES: APPLICATION FOR THE DETERMINATION OF PHENYLALANINE

Ardeshir Shokrollahi; Masuod Refahi


CPE-scanometry is applied for the determination of Phenylalanine amino acid. The extracted phase was diluted with alkali ethanol and transfered to a special cell. The cells containing the analyte solution were scanned with a scanner, then the color of each cell was analyzed, by software written in Visual Basic (VB 6), to obtain the red, green and blue values.

http://dx.doi.org/10.21577/0100-4042.20170303

Publicado online: novembro 7, 2018
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Quim. Nova 2019, 42(1), 42-48

 

FIGURES OF MERIT EVALUATION OF GC/MS METHOD FOR QUANTIFICATION OF 2-PHENOXYETHANOL FROM BALLPOINT PEN INK LINES AND DETERMINATION OF THE INFLUENCE OF SUPPORT PAPER ON SOLVENT EXTRACTION

Carina Maria Bello de Carvalho; Rafael Scorsatto Ortiz; Renata Pereira Limberger


The ballpoint pen ink ageing can be used to date questioned documents. One way to evaluate the ageing is the quantification of volatile components as 2-phenoxyethanol. This paper concerned about GC/MS method evaluation of merit figures and the influence of different kinds of paper sheets in the quantification of 2-phenoxyetanol, using Full Factorial Design.

http://dx.doi.org/10.21577/0100-4042.20170308

Publicado online: novembro 12, 2018
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Quim. Nova 2019, 42(1), 49-56

 

COMPOSIÇÃO QUÍMICA, ATIVIDADE ANTIRADICALAR E ANTIMICROBIANA DO PÓLEN APÍCOLA DE FABACEAE

Francisco R. L. Caldas; Francisco Augusto Filho; Heberty T. Facundo; Rodolfo F. Alves; Francisco de A. R. dos Santos; Girliane R. da Silva; Celso A. Camara; Tania M. S. Silva


The bees Apis mellifera visit species of Fabaceae. Pollen is acquired in hives and palynological analysis shows the botanical pollen types. The chemical constituents for the Fabaceae pollen bee were identified.

http://dx.doi.org/10.21577/0100-4042.20170305

Publicado online: novembro 7, 2018
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Quim. Nova 2019, 42(1), 57-64

 

SYNTHESIS AND NUCLEAR MAGNETIC RELAXATION PROPERTIES OF COMPOSITE IRON OXIDE NANOPARTICLES

Elisa M. N. de Oliveira; Maximiliano S. da Rocha; Ana Paula P. Froner; Nara R. S. Basso; Mara L. Zanini; Ricardo M. Papaléo


We describe a biocompatible nanoparticle system with a magnetic core coated with dextran. The coating was also crosslinked, grafted with amino groups and conjugated with a fluorophore, allowing magnetic resonance contrast action.

http://dx.doi.org/10.21577/0100-4042.20170309

Publicado online: novembro 14, 2018
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Quim. Nova 2019, 42(1), 65-70

 

CHEMICAL PROFILES OF ESSENTIAL OILS AND FATTY ACIDS FROM Erythrina velutina

Margareth G. Teixeira; Marcílio M. de Moraes; Claudio A. G. da Camara


Erythina velutina occurs with chromatic variations in its seeds and flowers on Fernando de Noronha Island. Chemical analysis revealed significant differences in the chemical profile of the essential oils between the red and orange flowers, whereas the fatty acid profile of the red and black seeds was similar.

http://dx.doi.org/10.21577/0100-4042.20170304

Publicado online: novembro 7, 2018
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Nota Técnica Quim. Nova 2019, 42(1), 84-94

 

ARTIFACTS IN THE ANALYSIS AND ASSESSMENT OF LOW-COST CONTAINERS FOR SAMPLING AND STORING GREENHOUSE GASES

Rafael C. Abruzzi; Beatriz Bonetti; Marçal J.R. Pires; Berenice. A. Dedavid; Arthur K. Bitencourt


Methanator-GC-FID analysis of low level of CO in presence of O2 need meticulous evaluation. Sample stability and container reusability indicated borosilicate flask with butyl rubber and PTFE/silicone septa sampler as more appropriate for storing GHG and CO samples.

http://dx.doi.org/10.21577/0100-4042.20170299

Publicado online: outubro 22, 2018
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Quim. Nova 2019, 42(1), 95-98

 

METODOLOGIA PARA DETECÇÃO ELETROQUÍMICA QUALITATIVA DE COMPOSTOS ORGÂNICOS EM INTERFACES PETRÓLEO/ÁGUA

Roberval A. Silva; Rejane M. P. Silva; Keyla T. Santos; Tatiana S. Araujo; Alexandre C. Alcântara; Hugo B. Suffredini


Experimental scheme of the detection of petroleum using oil/water interfaces with an electrochemical approach.

http://dx.doi.org/10.21577/0100-4042.20170298

Publicado online: outubro 22, 2018
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Educação Quim. Nova 2019, 42(1), 99-104

 

VALIDAÇÃO DE MÉTODO ESPECTROFOTOMÉTRICO DE ANÁLISE PARA A QUANTIFICAÇÃO DE ÁCIDO ACETILSALICÍLICO EM FORMULAÇÕES FARMACÊUTICAS: UMA PROPOSTA DE AULA EXPERIMENTAL PARA ANÁLISE INSTRUMENTAL

Enock José A. Goes Junior; Jakson S. Roeder; Kaiky B. L. Oliveira; Mateus P. Ferreira; Jonatas G. da Silva


Validation of a simple, precise, accurate, rapid and low-cost UV spectrophotometric method for quantification of acetylsalicylic acid in pharmaceutical formulations for experimental activities on teaching laboratories.

http://dx.doi.org/10.21577/0100-4042.20170300

Publicado online: outubro 29, 2018
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Assuntos Gerais Quim. Nova 2019, 42(1), 105-116

 

A BUSCA POR CHUMBO E PRATA EM MINAS GERAIS COMO ALTERNATIVA ÀS ESGOTADAS MINAS DE OURO E DIAMANTES NO SÉCULO XIX

Luciano E. Faria; Carlos A. L. Filgueiras


Silver bar (front and rear) obtained by the Baron of Eschwege in 1812 from the argentiferous galena (PbS) of the Rio Abaeté sertões - MG.

http://dx.doi.org/10.21577/0100-4042.20170301

Publicado online: outubro 31, 2018
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Quim. Nova 2019, 42(1), 117-127

 

ENTRE TIPOS E RADICAIS: A CONSTRUÇÃO DO CONCEITO DE VALÊNCIA

Helena S. Alvares Nogueira; Paulo Alves Porto


Theory of valence resulted from the amalgamation of earlier theories of radicals and types, and was connected with the development of several fundamental aspects of chemistry, such as structural theory, chemical bonding and the periodic table.

http://dx.doi.org/10.21577/0100-4042.20170311

Publicado online: novembro 28, 2018
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