Direct electron transfer bioelectronic interfaces: application to clinical analysis

Simultaneous use of electrochemistry and chemiluminescence to detect reactive oxygen species produced by human neutrophils

“…On the other hand, addition of catalase increased the signal (Fig. 4D between the rate of the current increase from O 2 •-sensitive gold electrodes and the number of cells seeded was obtained (Chang et al, 2005a(Chang et al, , 2005b, whereas in the present work, and some other studies (McNeil et al, 1992(McNeil et al, , 1995, the response curve was not linear, but showed a saturation behaviour at higher neutrophil loadings, reflecting the attachment of the latter to the electrode surface.…”

Selective and sensitive electrochemical biosensing of superoxide anion production by biological systems : a short overview of recent trends

“…The most developed device is constituted of cytochrome ccoated gold [17][18][19][20][21][22][23][24][25][26][27] or platinized carbon electrode [21,28,29]. Superoxide anion reduces the immobilized ferricytochrome c, which is immediately re-oxidized by the surface-modified electrode at a potential of 15-25 mV vs Ag/AgCl, as illustrated in figure 1.…”

Electrochemical DNA-sensor for evaluation of total antioxidant capacity of flavours and flavoured waters using superoxide radical damage

“…The immobilization of the enzyme can be carried out via short-chain thiol modified gold electrodes, long-chain thiol (mercaptoundecanoic acid), mixed-thiol, long-chain mixed thiol (mercaptoundecanoic acid/mercaptoundecanol) and hemin modified electrode (McNeil et al, 1995;Gobi and Mizutani, 2000;Ignatov et al, 2002). However, the performance of many of these types of devices is interfered by hydrogen peroxide, uric acid and some communication interference between the protein and the electrode (Chen et al, 2000;Beissenhirtz et al, 2004;Endo et al, 2002;Campanella et al, 2004;Emregül, 2005).…”