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

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].

Enzyme-free electrochemical sensor based on ZIF-67 for the detection of superoxide anion radical released from SK-BR-3 cells

2019 ◽  
Vol 855 ◽  
pp. 113653 ◽  
Author(s):  
Huanhuan Zhang ◽  
Xuan Cai ◽  
Hongli Zhao ◽  
Wenqian Sun ◽  
Zhenxing Wang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Superoxide Anion Radical

In vivo real-time measurement of superoxide anion radical with a novel electrochemical sensor

2009 ◽  
Vol 47 (7) ◽  
pp. 1039-1048 ◽  
Author(s):  
Motoki Fujita ◽  
Ryosuke Tsuruta ◽  
Shunji Kasaoka ◽  
Kenji Fujimoto ◽  
Ryo Tanaka ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Real Time ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Time Measurement ◽  
Superoxide Anion Radical ◽  
Real Time Measurement

Superoxide Anion Radical: Generation and Detection in Cellular and Non-Cellular Systems

2015 ◽  
Vol 22 (37) ◽  
pp. 4234-4256 ◽  
Author(s):  
Renan Chiste ◽  
Marisa Freitas ◽  
Adriana Mercadante ◽  
Eduarda Fernandes
Keyword(s):  
Superoxide Anion ◽  
Anion Radical ◽  
Cellular Systems ◽  
Superoxide Anion Radical ◽  
Radical Generation

scholarly journals Effect of extraction conditions of paprika oleoresins on their free radical scavenging and anticancer activity

2014 ◽  
Vol 12 (3) ◽  
pp. 377-385 ◽  
Author(s):  
Vesna Šaponjac ◽  
Dragana Četojević-Simin ◽  
Gordana Ćetković ◽  
Jasna Čanadanović-Brunet ◽  
Sonja Djilas ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Cell Line ◽  
Antiproliferative Activity ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Radical Scavenging ◽  
Superoxide Anion Radical ◽  
Food Ingredients ◽  
Supercritical Carbon

AbstractGround spice paprika was extracted with hexane, by conventional Soxhlet procedure (SX oleoresin), and with supercritical carbon dioxide at three different pressures — 20, 30 and 40 MPa (SF20, SF30 and SF40 oleoresins). The effect of extraction method and conditions on the colour intesity of paprika oleoresins, content of α-tocopherol, as well as antioxidant and antiproliferative activity was examined. Hexane showed highest selectivity for paprika pigments (886.02 ASTA), while α-tocopherol showed highest solubility (3846.9 mg kg−1) in supercritical carbon dioxide at 20 MPa. All paprika oleoresins exhibited good superoxide anion radical scavenging activity SF30 being the best superoxide anion radical scavenger. Cell growth activity was evaluated in vitro in human cell lines:cervix epitheloid carcinoma (HeLa), breast adenocarcinoma (MCF7) and colon adenocarcinoma (HT-29). The highest antiproliferative activity was exhibited by SX in MCF7 cell line (IC50=14.28 mg mL−1). Extract SF40 produced significant and selective antiproliferative action towards HeLa cell line. These results suggest that paprika oleoresins, due to high antiradical and tumor cell-inhibiting activity, can be regarded as functional food ingredients.

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