Results overview: Found 9 records in 0.02 seconds.
Articles, 7 records found
Research literature, 2 records found
Articles 7 records found  
1.
21 p, 1.5 MB Signal amplification for thrombin impedimetric aptasensor : sandwich protocol and use of gold-streptavidin nanoparticles / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
In this work, we report a highly specific amplification strategy demonstrated for the ultrasensitive biosensing of thrombin with the use of gold-streptavidin nanoparticles (strep-AuNPs) and silver reduction enhancement. [...]
2014 - 10.1016/j.bios.2013.10.068
Biosensors and bioelectronics, Vol. 54 (2014) , p. 408–414  
2.
22 p, 3.1 MB Three different signal amplification strategies for the impedimetric sandwich detection of thrombin / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
In this work, we report a comparative study on three highly specific amplification strategies for the ultrasensitive detection of thrombin with the use of aptamer sandwich protocol. The protocol consisted on the use of a first thrombin aptamer immobilized on the electrode surface, the recognition of thrombin protein, and the reaction with a second biotinylated thrombin aptamer forming the sandwich. [...]
2016 - 10.1016/j.aca.2016.01.027
Analytica chimica acta, Vol. 912 (March 2016) , p. 117-124  
3.
12 p, 402.3 KB A Reusable Impedimetric Aptasensor for Detection of Thrombin Employing a Graphite-Epoxy Composite Electrode / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Pacios Pujadó, Mercè (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)
Here, we report the application of a label-free electrochemical aptasensor based on a graphite-epoxy composite electrode for the detection of thrombin; in this work, aptamers were immobilized onto the electrodes surface using wet physical adsorption. [...]
2012
Sensors 2012,, Vol. 12 (2012) , p. 3037-3048  
4.
23 p, 1.7 MB Label free aptasensor for lysozyme detection : a comparison of the analytical performance of two aptamers / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Hayat, Akhtar (Universite de Perpignan. Biocapteurs-Analyses-Environnement) ; Mishra, Rupesh K. (Universite de Perpignan. Biocapteurs-Analyses-Environnement) ; Vasilescu, Alina (International Centre of Biodynamics) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Grup Sensors i Biosensors) ; Marty, Jean-Louis (Universite de Perpignan. Biocapteurs-Analyses-Environnement)
This work presents a comparison of two different aptamers (COX and TRAN) for the detection of the ubiquitous protein lysozyme using aptamer-based biosensors. The detection is based on the specific recognition by the aptamer immobilized on screen printed carbon electrodes (SPCEs) via diazonium coupling reaction. [...]
2015 - 10.1016/j.bioelechem.2015.05.009
Bioelectrochemistry, Vol. 105 (October 2015) , p. 72-77  
5.
22 p, 1.4 MB Aptamer-antibody sandwich assay for cytochrome c employing a MWCNT platform and the electrochemical impedance technique / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Sensors and Biosensors Group) ; Lukic, Sonja (University of Regensburg. Institut of Analytical Chemistry, Chemo- and Biosensors) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Sensors and Biosensors Group)
We report on a sensitive aptamer-antibody interaction-based assay for cytochrome c (Cytc) using electrochemical impedance. 4-Amino benzoic acid is used for the oriented immobilization of aminated aptamers onto multi-walled carbon nanotubes on the surface of a screen-printed electrode via electrochemical grafting. [...]
2015 - 10.1007/s00604-015-1540-6
Microchimica acta, Vol. 182, Issue 11 (August 2015) , p. 2045-2053  
6.
17 p, 2.3 MB A novel electrochemical aptamer-antibody sandwich assay for lysozyme detection / Ocaña Tejada, Cristina (Universitat Autònoma de Barcelona. Sensors and Biosensors Group) ; Hayat, Akhtar (Biocapteurs-Analyses-Environnement. Université de Perpignan via Domitia) ; Mishra, Rupesh (Biocapteurs-Analyses-Environnement. Université de Perpignan via Domitia) ; Vasilescu, Alina (International Centre of Biodynamics. Bucharest) ; Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Sensors and Biosensors Group) ; Marty, Jean-Louis (Biocapteurs-Analyses-Environnement. Université de Perpignan via Domitia)
In this paper, we have reported a novel electrochemical aptamer–antibody based sandwich biosensor for the detection of lysozyme. In the sensing strategy, an anti-lysozyme aptamer was immobilized onto the carbon electrode surface by covalent binding via diazonium salt chemistry. [...]
2015 - 10.1039/c5an00243e
The analyst, Vol. 140, Issue 12 (June 2015) , p. 4148-4153  
7.
2 p, 84.1 KB Nou dispositiu per a la detecció de citocrom C / Ocaña, Cristina (Universitat Autònoma de Barcelona. Grup de Sensors i Biosensors) ; Universitat Autònoma de Barcelona. Departament de Química
En els últims anys, juntament amb l'expansió de la nanotecnologia, s'han desenvolupat nombrosos dispositius capaços de detectar concentracions ínfimes d'elements, compostos o substàncies, com per exemple els biosensors, basats en sistemes de reconeixement biològic. [...]
2015
UAB divulga, Febrer 2015  

Research literature 2 records found  
1.
365 p, 8.7 MB Aptasensors based on electrochemical impedance spectroscopy / Ocaña Tejada, Cristina ; Valle Zafra, Manuel del, dir. (Universitat Autònoma de Barcelona. Departament de Química) ; Universitat Autònoma de Barcelona. Departament de Química
En els últims anys, a causa de la necessitat de diàgnostics ràpids i de millores en sensat, s'han utilitzat nous elements de reconeixement en biosensors. Un tipus d'aquests nous elements de reconeixement són els aptàmers. [...]
In the recent years, due to the need for rapid diagnosis and improvements in sensing, new recognition elements are employed in biosensors. One kind of these new recognition elements are aptamers. Aptamers are synthetic strands of DNA or RNA which are selected in vitro and have the ability to bind to proteins, ions, whole cells, drugs and low molecular weight ligands recognizing their target with high affinity and specificity. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2015  
2.
43 p, 1.7 MB Aptasensores impedimétricos para la detección de trombina / Ocaña Tejada, Cristina ; Valle Zafra, Manuel del, dir. (Universitat Autònoma de Barcelona. Departament de Química) ; Universitat Autònoma de Barcelona. Departament de Química
En el presente trabajo se ha desarrollado el primer aptasensor (biosensor de aptámero) en nuestro grupo de investigación, Grup de Sensors i Biosensors de la Universidad Autònoma de Barcelona. En concreto se han desarrollado dos aptasensores para la detección de la proteína trombina, uno basado en la inmovilización de aptámeros por adsorción física, y otro basado en la inmovilización de aptámeros por enlace covalente mediante la reacción EDAC-NHS. [...]
2011  

See also: similar author names
Interested in being notified about new results for this query?
Set up a personal email alert or subscribe to the RSS feed.