English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Xanthine biosensor based on glassy carbon electrode (GC) modified with graphene (GR), Co 3 O 4 nanoparticles and chitosan (CH) composite was fabricated. Xanthine oxidase (XAO) solution was dropped on the surface of Co 3 O 4 /CH/GR/GC and electrode was placed in saturated glutaraldehyde vapor for the crosslinking of the enzymes. The modified electrode was characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized experimental conditions, xanthine was detected in the concentration range from 5.0×10 -7 to 8.0×10 -5 M with a detection limit of 2.0×10 -7 M. The low Michaelis–Menten constant (0.17 mM) suggested enhanced enzyme affinity for the immobilized enzyme as compared to previously reported xanthine biosensors. Moreover, the biosensor exhibited some advantages, such as short response time (10 s), high sensitivity (6.58 μA/mM or 74.8 µA/mMcm 2 ) and good reproducibility (RSD = 1.2%). The suitability of the device was verified by xanthine assay in a fish meat. The biosensor provide to be a reliable, easy, fast and economical method for the evaluation of fish freshness.

CONSTRUCTION OF AN ELECTROCHEMICAL XANTHINE BIOSENSOR BASED ON GRAPHENE/COBALT OXIDE NANOPARTICLES/CHITOSAN COMPOSITE FOR FISH FRESHNESS DETECTION