ABSTRACT
Free radicals are highly reactive molecules with unpaired electrons that can be generated in vivo during metabolic processes. Reactive oxygen species (ROS) represent the most important class of free radicals generated in living systems. It is accepted that ROS play different roles in vivo. Some are positive and are related
10.1 Introduction .................................................................................................. 257 10.2 Biosensors for Determination of the Total Phenol Content .......................... 258
10.2.1 Polyphenol Oxidase-Based Biosensors ............................................. 259 10.2.1.1 Tyrosinase-Based Biosensors ............................................. 259 10.2.1.2 Laccase-Based Biosensors ................................................. 261
10.2.2 Peroxidase-Based Biosensors ........................................................... 262 10.3 Biosensors for Determination of the Reactive Oxygen Species (ROS)
Scavenging Capacity ..................................................................................... 263 10.3.1 Cyt c-Based Biosensors ....................................................................264 10.3.2 Superoxide Dismutase-Based Biosensors .........................................266 10.3.3 DNA-Based Biosensors .................................................................... 267
10.4 Conclusion ....................................................................................................268 Acknowledgment ...................................................................................................269 References ..............................................................................................................269
