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11:13, seg nov 4

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EDIÇÃO ATUAL vol. 45, No. 9, 2022



Artigo de Capa
Quim. Nova 2022, 45(9), 1114-1132

Norbornadieno: Síntese e Aplicações

Anni C. S. Gomes; Antonio J. Demuner*; Bryan N. S. Pinto; Elson S. Alvarenga

Norbornadiene (NBD) is versatile molecule. From 1950 to the present day, to solar energy to agrochemicals, NBD has proven to be a molecule with many applications in chemistry.

http://dx.doi.org/10.21577/0100-4042.20170904

Publicado online: maio 18, 2022
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Total access: 947

Artigo de Contra Capa
Quim. Nova 2022, 45(9), 1067-1074

Determination of Total and Bioaccessible Elements in Temporary Adhesive Tattoos Used by Children and Adults

André L. SquissatoI; Augusto T. S. del ClaroI; Riad D. LourençoII; Alexandre M. FiorotoIII; Angerson N. NascimentoII,*; Rodrigo A. A. MuñozI,*

We show that commercially-available temporary adhesive tattoos, including those packaged with bubble gums, present bioaccessible elements.

http://dx.doi.org/10.21577/0100-4042.20170917

Publicado online: junho 30, 2022
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Total access: 631

Artigo Quim. Nova 2022, 45(9), 1039-1046

 

Extração de Corantes Têxteis Utilizando Sistemas Aquosos Bifásicos Compostos por 2-Propanol e Sais de Sulfato

Juliana Gomes PimentelI; Olga Reinert Ramos GandolfiII; Vanessa Santos SampaioI; Lizzy Ayra Alcântara VeríssimoIII; Luciano Brito RodriguesIV; Cristiane Martins VelosoV; Rafael da Costa Ilhéu FontanIV; Renata Cristina Ferreira BonomoIV,*


Short chain alcohols (B) are infinitely soluble in water (C). Adding inorganic salt (A) increases the polarity of this aqueous phase, separates the organic constituent of this phase, making it an excellent component in the extraction of organic substances, such as textile dye.

http://dx.doi.org/10.21577/0100-4042.20170911

Publicado online: junho 8, 2022
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Total access: 836

Quim. Nova 2022, 45(9), 1047-1052

 

Avaliação de Metais Potencialmente Tóxicos em Chorume Proveniente de Área de Deposição de Resíduos Sólidos em Belém - Pará

Lianne Maria M. DiasI,*; Maria Vitória R. da SilvaI; Kelson do Carmo F. FaialII; Neuton T. Vasconcelos JuniorII; Raimunda F. S. MaiaI; José Antonio S. SouzaI; Emanuel Negrão MacedoI


Determination of potentially toxic metals in slurry sampling in Solid Waste Disposal area by Inductively coupled plasma atomic emission spectrometry technique.

http://dx.doi.org/10.21577/0100-4042.20170912

Publicado online: junho 8, 2022
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Total access: 750

Quim. Nova 2022, 45(9), 1053-1059

 

Salicilatos como Inibidores do Processo Oxidativo Mediado por Cobre e Ferro no Biodiesel B100

Eduardo Vivian MasettoI; Ana Claudia LazarotoI; Giovanna OleinikI; Fernanda Oliveira LimaI; André Lazarin GallinaII; Letiére C. SoaresI,*


Biodiesel when exposed to heat, metals, oxygen and other factors triggers the biofuel's oxidation reaction. In this work, alkyl salicylates were used to inhibit the biodiesel oxidative process by exposure to heat, copper and iron.

http://dx.doi.org/10.21577/0100-4042.20170916

Publicado online: junho 20, 2022
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Total access: 1013

Quim. Nova 2022, 45(9), 1060-1066

 

Synthesis of Toluene Diisocyanate Urethane Prepolymer Using Castor Oil and Evaluation of Mechanical Properties

Mayara Q. Savioli*; José R. R. Bortoleto


The search for renewable products brings concern to the polymer's segment due difficulties to replace the synthetic raw materials. This research shows a possible solution to replacement of synthetic polyol by a natural polyol, castor oil, for the manufacturing of cured polyurethanes.

http://dx.doi.org/10.21577/0100-4042.20170921

Publicado online: julho 1, 2022
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Total access: 592

Quim. Nova 2022, 45(9), 1075-1082

 

Fatores de Emissão e de Enriquecimento da Crosta para Elementos Traço (Mp2,5) Emitidos pela Frota Veicular na Região Metropolitana de São Paulo, Brasil

Juan R. S. BenattiI,*; Pedro J. Pérez-MartínezI; Regina M. MirandaII


Automotive vehicles are one of the main sources of PM2.5. This PM2.5 contains several trace elements, which can result from either exhaust or non-exhaust emissions. Determining the emission factors of these elements helps in the decision making aimed to improve air quality.

http://dx.doi.org/10.21577/0100-4042.20170923

Publicado online: julho 21, 2022
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Total access: 591

Quim. Nova 2022, 45(9), 1083-1091

 

Taninos e Flavonoides das Flores de Eugenia uniflora (Myrtaceae)

Patricia Santana Oliveira de Souza; Micheline Thais dos Santos; Rejane Gonçalves Monteiro; Maria Tamires Alves Espindola; Helter José Silva de Souza; Amanda Lins Bispo Monteiro; Celso de Amorim Camara; Tania Maria Sarmento Silva*


Eugenia uniflora (pitanga) flowers are rich in flavonoids and tannins.

http://dx.doi.org/10.21577/0100-4042.20170920

Publicado online: julho 1, 2022
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Total access: 727

Quim. Nova 2022, 45(9), 1092-1097

 

Diterpenos Ent-Abietanos de Euphorbia phosphorea (Euphorbiaceae)

Roseana A. R. MeirelesI; Lucas S. AbreuII; Joanda Paolla R. e SilvaI; Andreza B. S. CavalcantiI; Renata Priscila B. de MenezesI; Gabriela Cristina S. RodriguesI; Valnês S. Rodrigues JuniorIII, IV; José Iranildo M. de MeloV; Massuo Jorge KatoVI; Vicente Carlos de O. CostaI; Marcus Tullius ScottiI; Josean F. TavaresI,*


The phytochemical study of the roots of Euphorbia phosphorea Mart. (Euphorbiaceae) resulted in the isolation of ten ent-abietane diterpenes submitted to investigation of their antimycobacterial activity.

http://dx.doi.org/10.21577/0100-4042.20170932

Publicado online: agosto 19, 2022
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Total access: 614

Revisão Quim. Nova 2022, 45(9), 1098-1113

 

Biomarcadores Moleculares de Doenças Humanas: Conceitos Fundamentais, Modelos de Estudo e Aplicações Clínicas

Hans R. Zamora-ObandoI; Adriana T. GodoyI; Alan G. AmaralI; Alessandra de S. MesquitaI; Bruna Eduarda S. SimõesI; Heloise O. ReisI; Isabela RochaI; Matheus DallaquaI; Mariana BaptistãoI; Milena Cristina V. FernandesI; Monica F. LimaI; Ana Valéria C. SimionatoI, II,*


Currently, clinical research uses biological models and advances in chemical analysis platforms to identify compounds (biomarkers) that better understand the disease and generate diagnostic and therapeutic advances to improve people's quality of life.

http://dx.doi.org/10.21577/0100-4042.20170905

Publicado online: maio 26, 2022
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Total access: 1839

Quim. Nova 2022, 45(9), 1133-1145

 

Avanços na Produção e Formulação de Inoculantes Microbianos Visando uma Agricultura mais Sustentável

Camila FlorencioI; Ricardo Bortoletto-SantosI, II; Camila P. FavaroI, III; Mariana G. BrondiI, III; Camila C. V. VellosoI, III; Rodrigo KlaicI; Caue RibeiroI; Cristiane S. FarinasI, III,*; Luiz H. C. MattosoI


Biofertilizers/microbial inoculants are potential alternatives for sustainable agriculture and the development of new formulations is a crucial step for the success of these bioproducts.

http://dx.doi.org/10.21577/0100-4042.20170909

Publicado online: junho 1, 2022
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Total access: 1024

Nota Técnica Quim. Nova 2022, 45(9), 1146-1152

 

Assessment of α-Amylase Inhibition Activity by an Optimized and Validated In Vitro Microscale Method

Graciela Granados Guzmán; Blanca Alicia Alanís Garza; Rocío Castro Ríos; Noemí Waksman Minsky; Ricardo Salazar Aranda*


α-Amylase catalyzes the cleavage of the α-D-(1-4) glycosidic bond in starch to produce reducing sugars. Reducing sugars reduce the aldehyde group of 3,5-dinitrosalicylic acid (DNS) to form 3-amino-5-nitrosalicylic acid (ANSA).

http://dx.doi.org/10.21577/0100-4042.20170919

Publicado online: junho 30, 2022
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Total access: 659

Quim. Nova 2022, 45(9), 1153-1159

 

Desenvolvimento de Acessório Portátil de Controle de Temperatura para Medidas Espectroscópicas

Daniel Aparecido Pires; Henrique José da Silva; Lucas Alonso Rocha; Eduardo José Nassar*


Temperature effect on structure and properties of the chemical substance. Development of the accessory using Peltier principle, this system can be used to identify the degradation in function of the temperature to low cost.

http://dx.doi.org/10.21577/0100-4042.20170925

Publicado online: julho 21, 2022
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Total access: 418

Educação Quim. Nova 2022, 45(9), 1160-1166

 

Estudo Teórico e Experimental de Estrutura e Reatividade Relacionado ao Metabolismo e Toxicidade do Paracetamol

Rosivaldo S. BorgesI,*; Wanda S. CostaI; Ellen P. C. GurrãoI; Luiz H. C. HolandaI; Alanna C. L. F. SousaI; Joyce K. L. ValeI; Cláudio N. AlvesII; Albérico B. F. da SilvaIII


Paracetamol is an analgesic and antipyretic related to liver toxicity. The metabolism and chemical intermediates are involved in its side effect. These mechanisms were evaluated using theoretical and experimental approaches. All results can be applied on pharmaceutical chemistry teaching.

http://dx.doi.org/10.21577/0100-4042.20170927

Publicado online: julho 21, 2022
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Total access: 801

Quim. Nova 2022, 45(9), 1167-1176

 

Experimento Didático de Quimiometria Empregando Imagens Digitais Obtidas por Celular para Determinar Adulteração de Azeite de Oliva com Óleo de Soja: Um Tutorial, Parte Vi

Carlos Alberto RiosI; André Marcelo de SouzaII; Ronei Jesus PoppiI, +; Márcia Cristina BreitkreitzI,*


The mixtures of olive oil with soybean oil were prepared and digital images were collected. Based on the images and using univariate and multivariate approaches, analytical curves were constructed and these were used to predict the percentage of olive oil in commercial samples.

http://dx.doi.org/10.21577/0100-4042.20170946

Publicado online: setembro 13, 2022
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Total access: 595

Assuntos Gerais Quim. Nova 2022, 45(9), 1177-1181

 

Uma Nota Sobre a Transposição de Termos Químicos para a Língua Portuguesa

Giuliana C. de Souza; Luciano R. Bastos; André G. H. Barbosa*


In the graph above It is remarked that while the "real referent" and "scientific meaning" are actually independent of any particular language, the "orthographic signs", in written and spoken forms, are always language dependent.

http://dx.doi.org/10.21577/0100-4042.20170931

Publicado online: agosto 19, 2022
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Total access: 626

On-line version ISSN 1678-7064 Printed version ISSN 0100-4042
Química Nova
Publicações da Sociedade Brasileira de Química
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