Electrochemical Sensor for Simultaneous Measurement of Nitrite and Superoxide Anion Radical Using Superoxide Dismutase-Mimetic Manganese(III) Tetrakis(1-methyl-4-pyridyl)Porphyrin on Polypyrrole Matrix

2011 ◽  
Vol 9 (5) ◽  
pp. 1682-1688 ◽  
Author(s):  
Seenivasan Rajesh ◽  
Niroj Kumar Sethy ◽  
Kalpana Bhargava ◽  
Govindaswamy Ilavazhagan ◽  
Sushil Kumar Singh ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Electrochemical Sensor ◽  
Simultaneous Measurement ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Superoxide Anion Radical

A Novel Superoxide Anion Radical Nonenzymatic Electrochemical Sensor Based on PtRuCu Ternary Alloy Nanoparticles/Graphene Composite Modified Electrode

NANO ◽  
2017 ◽  
Vol 12 (01) ◽  
pp. 1750006 ◽  
Author(s):  
Jujie Ren ◽  
Miao Zhai ◽  
Min Cui ◽  
Liujia Li ◽  
Congcong Yu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Ternary Alloy ◽  
Superoxide Anion ◽  
Anion Radical ◽  
High Sensitivity ◽  
Electrochemical Determination ◽  
Superoxide Anion Radical ◽  
Alloy Nanoparticles ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide

A superoxide anion radical (O[Formula: see text] nonenzymatic electrochemical sensor based on PtRuCu ternary alloy nanoparticles/electrochemically reduced graphene oxide (ERGO) composite modified glassy carbon electrode (PtRuCu/ERGO/GCE) was developed. ERGO and PtRuCu/ERGO composites were characterized by scanning electron microscopy. The prepared PtRuCu/ERGO/GCE showed remarkable performance toward the electrocatalytic reduction of (O[Formula: see text]. The sensor possessed a high sensitivity of 1725[Formula: see text]A[Formula: see text][Formula: see text][Formula: see text]mM[Formula: see text][Formula: see text]cm[Formula: see text], a wide linear range of 7.5–330[Formula: see text][Formula: see text]M ([Formula: see text]0.993) and a low detection limit of 0.7[Formula: see text][Formula: see text]M ([Formula: see text]/[Formula: see text]), as well as excellent selectivity, reproducibility and stability, which can be attributed to the synergistic effect of ERGO and PtRuCu ternary alloy nanoparticles. Therefore, the prepared sensor is promising for electrochemical determination of O[Formula: see text].

scholarly journals Detection of Superoxide Anion Radical in a Stratum Corneum Intercellular Lipid Model Using an Electrochemical Sensor

2011 ◽  
Vol 60 (12) ◽  
pp. 647-654 ◽  
Author(s):  
Teruhisa Kaneko ◽  
Chihiro Kaise ◽  
Yoko Kimoto ◽  
Shota Suzuki ◽  
Takeshi Kondo ◽  
...  
Keyword(s):  
Stratum Corneum ◽  
Electrochemical Sensor ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Superoxide Anion Radical ◽  
Intercellular Lipid

Changes in the superoxide radical and superoxide dismutase levels in the uterus of Rattus norvegicus during the estrous cycle and a possible role for superoxide radical in uterine oedema and cell proliferation at proestrus

1991 ◽  
Vol 69 (4) ◽  
pp. 313-316 ◽  
Author(s):  
M. Laloraya ◽  
G. P. Kumar ◽  
M. M. Laloraya
Keyword(s):  
Cell Proliferation ◽  
Superoxide Dismutase ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Superoxide Radical ◽  
Inverse Correlation ◽  
Oestrous Cycle ◽  
Superoxide Anion Radical ◽  
Albino Rat ◽  
Cyclic Changes

Superoxide anion radical, a radical whose toxicity is well documented, is present in the uterus of albino rat. The cyclic changes that it undergoes during the reproductive cycle are also illustrated. An inverse correlation is seen between the levels of superoxide radical and the enzyme dismutating it, i.e., superoxide dismutase (EC 1.15.1.1), which is also reported to be present in the uterus of albino rat and is shown to exhibit cyclic changes during its oestrous cycle. The high levels of superoxide radical at pro-oestrus enable us to hypothesize that superoxide may be involved in regulating the oedema and cell proliferation of the uterus during proestrus.Key words: superoxide anion radical, superoxide dismutase, uterus, oestrous cycle, uterine oedema, cell proliferation.

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