UAB Digital Repository of Documents 143 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
1.
6 p, 2.4 MB Analysis of spices & herbs and its phenolic content by means of an electronic tongue / Cetó Alsedà, Xavier (Universitat Autònoma de Barcelona. Departament de Química) ; Sarma, Munmi (Universitat Autònoma de Barcelona. Departament de Química) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
The drying process to which herbs and spices are submitted has a significant impact on the flavour and quality of those as many compounds might be degraded or transformed. This is especially relevant for most aromatic and bioactive compounds (e. [...]
2024 - 10.1016/j.lwt.2023.115578
LWT, Vol. 191 (January 2024) , art. 115578  
2.
2 p, 803.8 KB Els avenços més recents en sensors electroquímics es van donar cita a la jornada científica ELECTROBIONET / Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
Investigadors del Departament de Química participen a la xarxa temàtica ELECTROBIONET sobre plataformes sensores per a anàlisis en entorns biològics. El 24 de novembre passat, investigadors de tot Espanya que participen a la xarxa es van reunir a Sevilla per compartir els nous avenços en aquest àmbit.
Investigadores del Departamento de Química participan en la red temática ELECTROBIONET sobre plataformas sensoras para análisis en entornos biológicos. El pasado 24 de noviembre, investigadores de toda España que participan en la red se reunieron en Sevilla para compartir los nuevos avances en este ámbito.

2023
UAB divulga, Desembre 2023, p. 1-2
2 documents
3.
184 p, 15.1 MB Electronic tongues based on electropolymerized molecularly imprinted polymers for pharmaceutical analysis / Wang, Mingyue ; Cetó Alsedà, Xavier, dir. ; Valle Zafra, Manuel del, dir.
En les darreres dècades, atès que el creixent ús de fàrmacs pel tractament de diverses malalties contribueix a la millora progressiva de la qualitat de vida de l'ésser humà, l'anàlisi farmacèutica s'ha considerat un afer important que presenta una gran demanda en diversos camps, com la indústria farmacèutica, el control clínic i la protecció del medi ambient. [...]
En las últimas décadas, dado que el creciente uso de fármacos para el tratamiento de diversas enfermedades contribuye a la progresiva mejora de la calidad de vida del ser humano, el análisis farmacéutico se ha considerado una cuestión importante que presenta una gran demanda en varios campos, como la industria farmacéutica, el control clínico y la protección del medio ambiente. [...]
In the past decades, as the increasing use of drugs for treating various diseases contributed to the progressively improved life quality of human being, pharmaceutical analysis has been regarded as an important issue that is demanded in several fields, such as pharmaceutical industry, clinical monitoring, and environmental protection. [...]

2022  
4.
21 p, 481.2 KB Label-free impedimetric aptasensor based on epoxy-graphite electrode for the recognition of cytochrome c / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Departament de Química) ; Arcay, Evelien (Universitat Autònoma de Barcelona. Departament de Química) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
In this work, we present a label -free impedimetric aptasensor for the recognition of cytochrome c (Cyt c) at a pM concentration level based on an epoxy-graphite composite electrode. The technique employed for the detection of the protein Cyt c is electrochemical impedance spectroscopy (EIS). [...]
2014 - 10.1016/j.snb.2013.10.040
Sensors and actuators. B, Chemical, Vol. 191 (February 2014) , p. 860-865  
5.
18 p, 880.2 KB A combination of dynamic measurement protocol and advanced data treatment to resolve the mixtures of chemically similar analytes with potentiometric multisensor system / Kirsanov, Dmitry (St. Petersburg State University. Chemistry Department) ; Cetó Alsedà, Xavier (Universitat Autònoma de Barcelona. Departament de Química) ; Khaydukova, Maria (St. Petersburg State University. Chemistry Department) ; Blinova, Yulia (St. Petersburg State University. Chemistry Department) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química) ; Babain, Vasily (Khlopin Radium Institute) ; Legin, Andrey (St. Petersburg State University. Chemistry Department)
Data processing techniques and measuring protocol are very important parts of the multisensor systems methodology. Complex analytical tasks like resolving the mixtures of two components with very similar chemical properties require special attention. [...]
2014 - 10.1016/j.talanta.2013.11.003
Talanta, Vol. 119 (February 2014) , p. 226-231  
6.
22 p, 457.6 KB A comparison of four protocols for the immobilization of an aptamer on graphite composite electrodes / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Departament de Química) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
We have performed a comparative study on four protocols for the immobilization of the thrombin aptamer on a graphite-epoxy composite electrode with the aim to identify the most practical method for designing the corresponding impedimetric aptasensor. [...]
2014 - 10.1007/s00604-013-1126-0
Mikrochimica acta, Vol. 181, Issue 3-4 (February 2014) , p. 355-363  
7.
16 p, 527.5 KB Voltammetric BioElectronic Tongue for the analysis of phenolic compounds in rosé cava wines / Cetó Alsedà, Xavier (Universitat Autònoma de Barcelona. Departament de Química) ; Capdevila Mestres, Josefa (Estació de Viticultura i Enologia, INCAVI) ; Mínguez, Santiago (Estació de Viticultura i Enologia, INCAVI) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
A BioElectronic Tongue (BioET) based on a sensor array comprising 4 voltammetric enzyme-modified (bio)sensors plus pattern recognition and multivariate calibration data processing tools was applied towards the analysis of rosé cava wines. [...]
2014 - 10.1016/j.foodres.2013.11.025
Food Research International, Vol. 55 (January 2014) , p. 455-461  
8.
15 p, 1.5 MB Voltammetric electronic tongue to identify Brett character in wines. On-site quantification of its ethylphenol metabolites / González-Calabuig, Andreu (Universitat Autònoma de Barcelona. Departament de Química) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
This work reports the applicability of a voltammetric sensor array able to evaluate the content of the metabolites of the Brett defect: 4-ethylphenol, 4-ethylguaiacol and 4-ethylcatechol in spiked wine samples using the electronic tongue (ET) principles. [...]
2018 - 10.1016/j.talanta.2017.10.041
Talanta, Vol. 179 (March 2018) , p. 70-74  
9.
21 p, 538.2 KB Development and application of an electronic tongue for detection and monitoring of nitrate, nitrite and ammonium levels in waters / Nuñez, L. (Universidade Estadual Paulista. Instituto de Química. Departamento de Química Analítica (Brazil)) ; Cetó Alsedà, Xavier (Universitat Autònoma de Barcelona. Departament de Química) ; Pividori, María Isabel (Universitat Autònoma de Barcelona. Departament de Química) ; Zanoni, Maria Valnice (Universidade Estadual Paulista. Instituto de Química. Departamento de Química Analítica (Brazil)) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
This work presents the first study and development of an electronic tongue analysis system for the monitoring of nitrogen stable species: nitrate, nitrite and ammonium in water. The electronic tongue was composed of an array of 15 potentiometric poly(vinyl chloride) membrane sensors sensitive to cations and anions plus an artificial neural network (ANN) response model. [...]
2013 - 10.1016/j.microc.2013.04.018
Microchemical Journal, Vol. 110 (September 2013) , p. 273-279  
10.
25 p, 1.1 MB Enhanced electrochemical response of carbon quantum dot modified electrodes / Algarra, Manuel (Universidad de Málaga. Departamento de Química Inorgánica, Cristalografía y Mineralogía) ; González-Calabuig, Andreu (Universitat Autònoma de Barcelona. Departament de Química) ; Radotić, Ksenija (University of Belgrade. Institute for Multidisciplinary Research) ; Mutavdzic, D. (University of Belgrade. Institute for Multidisciplinary Research) ; Ania, Conchi (Centre national de la recherche scientifique. Conditions Extrêmes et Matériaux: Haute Température et Irradiation) ; Lázaro-Martínez, Juan Manuel M. (Universidad de Buenos Aires. Departamento de Química Orgánica) ; Jiménez-Jiménez, José (Universidad de Málaga. Departamento de Química Inorgánica, Cristalografía y Mineralogía) ; Rodríguez-Castellón, Enrique (Universidad de Málaga. Departamento de Química Inorgánica, Cristalografía y Mineralogía) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
A glassy carbon electrode (GCE) was surface-modified with carbon quantum dots (CQDs) and applied for the effective enhancement of the electrochemical signal for dopamine and uric acid determination. CQDs were prepared from graphite by a green modification of the Hummers method. [...]
2018 - 10.1016/j.talanta.2017.09.082
Talanta, Vol. 178 (Feb. 2018) , p. 679-685  

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2 Valle, M.
1 Valle, M. del
15 Valle, Marta
11 Valle, Marta,
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