Ferrous iron-induced luminol chemiluminescence: a method for hydroxyl radical study

Yıldız, Gülüzar; Demiryürek, Abdullah Tuncay

doi:10.1016/s1056-8719(98)00025-2

Cited by 95 publications

(10 citation statements)

References 13 publications

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“…Hydroxyl radicals were generated by the addition of ferrous iron to the buffer solution (Yıldız & Demiryürek, 1998). Freshly prepared 200 lM FeSO 4 (in 0.9% NaCl) and various concentrations of daylily flower extracts were added to the 0.1 M PBS (pH 7.4) in the stainless steel cell for 60 s. At the 60-s mark, 3 mM luminol was injected into the cell and the chemiluminescence was measured continuously for a further 180 s. The total chemiluminescence intensity was calculated by integrating the area under the curve and subtracting the background level.…”

Section: Scavenging Activity Of Hydroxyl Radical ( å Oh) By Daylily Fmentioning

confidence: 99%

Determination of lutein and zeaxanthin and antioxidant capacity of supercritical carbon dioxide extract from daylily (Hemerocallis disticha)

Hsu

Tsai²,

Chen

et al. 2011

Food Chemistry

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Section: Scavenging Activity Of Hydroxyl Radical ( å Oh) By Daylily Fmentioning

confidence: 99%

Determination of lutein and zeaxanthin and antioxidant capacity of supercritical carbon dioxide extract from daylily (Hemerocallis disticha)

Hsu

Tsai²,

Chen

et al. 2011

Food Chemistry

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“…To better determine whether As(III) oxidation occurred in part due to the presence of valence band holes in the presence of light, we carried out experiments that utilized mannitol. Prior studies have shown that mannitol is an efficient scavenger of OH· and oxidative holes [ 46 ]. Figure 5 shows data from an experiment where 20 mM mannitol was added to particular reaction mixtures.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of mannitol to certain reaction solutions was also carried out to supplement the coumarin studies. Prior studies have shown that mannitol is an effective scavenger of OH· and oxidative holes formed during the irradiation of semiconductor materials [ 46 ]. In these particular experiments, 20 mM mannitol was added to specific reaction mixtures of birnessite and As(III) and the effect of the mannitol addition on product formation was investigated under both light and dark conditions.…”

Section: Methodsmentioning

confidence: 99%

Oxidation of arsenite to arsenate on birnessite in the presence of light

et al. 2016

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The effect of simulated solar radiation on the oxidation of arsenite [As(III)] to arsenate [As(V)] on the layered manganese oxide, birnessite, was investigated. Experiments were conducted where birnessite suspensions, under both anoxic and oxic conditions, were irradiated with simulated solar radiation in the presence of As(III) at pH 5, 7, and 9. X-ray absorption spectroscopy (XAS) was used to determine the nature of the adsorbed product on the surface of the birnessite. The oxidation of As(III) in the presence of birnessite under simulated solar light irradiation occurred at a rate that was faster than in the absence of light at pH 5. At pH 7 and 9, As(V) production was significantly less than at pH 5 and the amount of As(V) production for a given reaction time was the same under dark and light conditions. The first order rate constant (kobs) for As(III) oxidation in the presence of light and in the dark at pH 5 were determined to be 0.07 and 0.04 h−1, respectively. The As(V) product was released into solution along with Mn(II), with the latter product resulting from the reduction of Mn(IV) and/or Mn(III) during the As(III) oxidation process. Post-reaction XAS analysis of As(III) exposed birnessite showed that arsenic was present on the surface as As(V). Experimental results also showed no evidence that reactive oxygen species played a role in the As(III) oxidation process.Electronic supplementary materialThe online version of this article (doi:10.1186/s12932-016-0037-5) contains supplementary material, which is available to authorized users.

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“…Hydroxyl radical was generated by addition of ferrous iron into the buffer solution as described by Yıldız and Demiryürek (10). Freshly prepared FeSO 4 (40 nM) was added to the PBS plus luminol (250 μM) mixture and CL was recorded continuously for 3 min.…”

Section: Methodsmentioning

confidence: 99%

Effects of prilocaine and articaine on human leucocytes and reactive oxygen species in vitro

Günaydın

Demiryürek²

2001

Acta Anaesthesiol Scand

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Prilocaine interacted with superoxide, HOCl and H2O2, whereas articaine reacted with superoxide, HOCl, and peroxynitrite. The direct scavenging properties of these drugs might be involved in the inhibition observed in leucocyte assay and could provide experimental support for investigating the potential benefit of using these local anaesthetics in patients presenting pathologies associated with free radical reactions.

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Ferrous iron-induced luminol chemiluminescence: a method for hydroxyl radical study

Cited by 95 publications

References 13 publications

Determination of lutein and zeaxanthin and antioxidant capacity of supercritical carbon dioxide extract from daylily (Hemerocallis disticha)

Determination of lutein and zeaxanthin and antioxidant capacity of supercritical carbon dioxide extract from daylily (Hemerocallis disticha)

Oxidation of arsenite to arsenate on birnessite in the presence of light

Effects of prilocaine and articaine on human leucocytes and reactive oxygen species in vitro

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