Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Multiple scanning electrochemical microscopy mapping of tyrosinase in micro-contact printed fruit samples on polyvinylidene fluoride membrane
 
Loading...
Thumbnail Image
research article

Multiple scanning electrochemical microscopy mapping of tyrosinase in micro-contact printed fruit samples on polyvinylidene fluoride membrane

Lin, Tzu-En  
•
Cortes-Salazar, Fernando  
•
Lesch, Andreas  
Show more
2015
Electrochimica Acta

Herein, we introduce three orthogonal and compatible methods for detecting tyrosinase, a key factor in fruit browning and skin disorders, with high spatial resolution by means of scanning electrochemical microscopy (SECM). All methods are performed subsequently on the same substrate area providing a wide range of relevant information. The first SECM approach that relies on the mapping of a differential pore oxygen concentration induced by the local hydrophobic changes that the adsorption of tyrosinase generates on a porous polyvinylidene fluoride (PVDF) membrane. The second approach is based on the direct monitoring of the enzymatic activity of tyrosinase by detecting amperometrically the reaction products from the enzymatic conversion of L-3,4-dihydroxyphenylalanine (L-DOPA). Finally, tyrosinase was visualized implementing a tyrosinase sandwich immunoassay readout by SECM. The multiple SECM detection strategies were successfully applied to map unequivocally the tyrosinase enzymatic activity of a micro-contact printed banana sample. Furthermore, differential pulse voltammetry and mass spectrometry analyses were employed to elucidate the nature of the electrochemical response obtained during the tyrosinase enzymatic activity experiments.

  • Files
  • Details
  • Metrics
Type
research article
DOI
10.1016/j.electacta.2015.03.224
Web of Science ID

WOS:000362292200009

Author(s)
Lin, Tzu-En  
•
Cortes-Salazar, Fernando  
•
Lesch, Andreas  
•
Qiao, Liang  
•
Bondarenko, Alexandra  
•
Girault, Hubert  
Date Issued

2015

Publisher

Elsevier

Published in
Electrochimica Acta
Volume

179

Start page

57

End page

64

Subjects

Scanning electrochemical microscopy

•

tyrosinase

•

enzymatic activity

•

electrochemical immunoassay readout

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LEPA  
Available on Infoscience
April 5, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/112883
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés