Results 1 to 10 of about 1,101 (100)

Development of an Electrochemical Sensor Based on Nanocomposite of Fe₃O₄@SiO₂ and Multiwalled Carbon Nanotubes for Determination of Tetracycline in Real Samples

Electrochem, 2021
In this work, an electrochemical sensor (GCE/MWCNT/Fe3O4@SiO2) based on a composite of multiwalled carbon nanotubes (MWCNT) and an Fe3O4@SiO2 (MMN) nanocomposite on a glassy carbon electrode (GCE) was developed for the detection of tetracycline (TC). The
Edna Ferreira Amaral, Daniela Nunes da Silva, Maria Cristina Silva, Arnaldo César Pereira   +3 more
doaj   +1 more source

Development of highly stable conductive multiwalled carbon nanotube ink using covalent and non-covalent functionalization for electrochemical sensors

Journal of Electrochemical Science and Engineering, 2021
The purpose of this work was the fabrication of a conductive carbon nanotube (CNT) ink. The proposed CNT ink remained remarkably stable over several months.
Ana Elisa Ferreira Oliveira, Arnaldo César Pereira, Lucas Franco Ferreira   +2 more
doaj   +1 more source

Carbon nanomaterials: synthesis and applications to development of electrochemical sensors in determination of drugs and compounds of clinical interest

Reviews in Analytical Chemistry, 2020
It is notorious that researches related to electrochemical sensors increased significantly due the promising characteristics that these devices present such as the possibility of obtaining information, with minimum manipulation of the studied system, in ...
Porto Laís S., Silva Daniela N., de Oliveira Ana Elisa F., Pereira Arnaldo C., Borges Keyller B.   +4 more
doaj   +1 more source

Las bóvedas pétreas nervadas de Galicia: identificación de soluciones

Informes de la Construccion, 2015
El artículo presenta los distintos grupos de soluciones de bóvedas pétreas nervadas sobre cuatro apoyos que existen en Galicia, representándolas gráficamente a la misma escala. Complementariamente se incluye también un pequeño grupo de bóvedas sobre ocho
M. J. Freire-Tellado, S. B. Tarrío-Carrodeguas   +1 more
doaj   +1 more source

Chiral Capillary Electrokinetic Chromatography: Principle and Applications, Detection and Identification, Design of Experiment, and Exploration of Chiral Recognition Using Molecular Modeling

Molecules, 2021
This work reviews the literature of chiral capillary electrokinetic chromatography from January 2016 to March 2021. This is done to explore the state-of-the-art approach and recent developments carried out in this field.
Sami El Deeb, Camilla Fonseca Silva, Clebio Soares Nascimento Junior, Rasha Sayed Hanafi, Keyller Bastos Borges   +4 more
doaj   +1 more source

Níveis séricos de vitamina "A" em operários de Manaus, Amazonas [PDF]

Acta Amazonica, 1981
Resumo O estado nutricional relacionado à vitamina "A" foi estudado em 382 operários de ambos os sexos, de classe sócio-econômica baixa em quatro fábricas de Manaus, através da utilização dos níveis de Retinol e caroteno séricos e inquérito alimentar nas
Helyde Albuquerque Marinho, Thelma Suely França, Yolanda Silva Rebelo, Roger Shrimpton   +3 more
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Arquitectura de la pequeña y mediana industria holandesa en los años de la posguerra: imagen y modernidad

Cuaderno de Notas, 2016
Este texto fue primeramente presentado en inglés en el IX Congreso  DOCOMOMO internacional de Ankara 2006 y después, con importantes ampliaciones, publicado en neerlandés en la revista Erfgoed van Industrie en Techniek, núm. 2/3, en 2011.
Rafael García
doaj   +1 more source

Development and Application of Electrochemical Sensor Based on Molecularly Imprinted Polymer and Carbon Nanotubes for the Determination of Carvedilol

Chemosensors, 2016
This work describes the preparation of a glassy carbon electrode (GCE) modified with molecularly imprinted polymer (MIP) and multiwalled carbon nanotubes (MWCNTs) for determination of carvedilol (CAR).
Malena Karla Lombello Coelho, Juliana de Fátima Giarola, Anny Talita Maria da Silva, César Ricardo Teixeira Tarley, Keyller Bastos Borges, Arnaldo César Pereira   +5 more
doaj   +1 more source

Development of Electrochemical Sensor Based on Carbonaceal and Metal Phthalocyanines Materials for Determination of Ethinyl Estradiol

Chemosensors, 2019
This work describes the development of an electrochemical sensor that was used in the determination of ethinyl estradiol (EE) in pharmaceutical formulations, river water, and milk using the square wave voltammetry technique.
Malena Karla Lombello Coelho, Daniela Nunes da Silva, Arnaldo César Pereira   +2 more
doaj   +1 more source

Avances en la construcción de obras de fábrica

Informes de la Construccion, 1992
Los avances experimentados en la construcción de las fábricas en los últimos años en Alemania, después de analizados y ensayados en profundidad, permiten prever un crecimiento en la utilización de las fábricas, aprovechando las cualidades de sus ...
Walter Mann
doaj   +1 more source