radical ion

(redirected from Radical cation)

radical ion

[‚rad·ə·kəl ′ī·ən]
(chemistry)
A charged compound that has an unpaired electron; it may be either a radical cation (positively charged) or radical anion (negatively charged).
References in periodicals archive ?
(20) After donating an electron to OH* melatonin becomes a free radical itself, the indolyl radical cation with very low reactivity, thereby being non toxic to cells.
A novel automated direct measurement method for total antioxidant capacity using a new generation, more stable abts radical cation. Clin.
2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) radical cation scavenging assay: 40 [micro]L of extracts prepared at different final concentrations (20 [micro]g/mL, 50 [micro]g/mL, 100 [micro]g/mL), 3960 [micro]L of ABTS*+ working solution were combined.
ABTS radical cation (ABTS*+) was produced by reacting ABTS stock solution with 2.45 mM potassium persulfate (final concentration) and allowing the mixture to stand in the dark at room temperature for 12-16 h before use.
The S[C.sub.50] values (concentration of mango peel extract capable of scavenging 50% of ABTS radical cation) of the peel extracts (NPEE, CPEE, NPWE, and CPWE) from six mango cultivars for ABTS radical cation-scavenging activity are also presented in Table 2.
Since the characteristic absorption spectrum of ABTS cation radical can be determined at 414, 645, 734, and 815 nm [30, 31] because of the presence of antioxidants [32], common organic radical cation ([ABTS.sup.+]) assay is one of the most widely applied methods to assess antioxidant activity [33].
Erel, "A novel automated direct measurement method for total antioxidant capacity using a new generation, more stable ABTS radical cation," Clinical Biochemistry, vol.
ABTS radical cation scavenging activity: The ABTS (2, 2 azobis, 3-ethylbenzothiozoline-6-sulphonic acid) radical cation scavenging activity was performed by a slight modification of Re et al.
In case an amount equivalent to one electron is transferred, the nucleophile becomes a radical cation, while the electrophile becomes a radical anion.