Reevaluation of the Reactivity of Superoxide Radicals by Consideration of Both the Alkalinity of KO2 and the Superoxide-Scavenging Activity of Xanthine Oxidase

2013 ◽  
Vol 86 (3) ◽  
pp. 394-394
Author(s):  
Keiichi Mitsuta
Keyword(s):  
Xanthine Oxidase ◽  
Superoxide Radicals ◽  
Scavenging Activity ◽  
Superoxide Scavenging Activity

Simultaneous detection of superoxide anion radicals and determination of the superoxide scavenging activity of antioxidants using a N,N-dimethyl-p-phenylene diamine/Nafion colorimetric sensor

2017 ◽  
Vol 9 (43) ◽  
pp. 6202-6212 ◽  
Author(s):  
Ferda Dondurmacıoğlu ◽  
Aslı Neslihan Avan ◽  
Reşat Apak
Keyword(s):  
Superoxide Anion ◽  
Simultaneous Detection ◽  
Colorimetric Sensor ◽  
Superoxide Radicals ◽  
Scavenging Activity ◽  
Superoxide Scavenging Activity ◽  
Superoxide Anion Radicals ◽  
Phenylene Diamine ◽  
Anion Radicals

A novel colorimetric DMPD assay was developed for superoxide radicals generated by the NADH/PMS/O2 system, and compared with conventional NBT assay.

scholarly journals ANTIOXIDANT ACTIVITY OF NUTRI-PEPPER ENHANCER

2021 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Yap Ann ◽  
Sang Jam ◽  
Lawrance Tuah
Keyword(s):  
Antioxidant Activity ◽  
Xanthine Oxidase ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Piper Nigrum ◽  
Scavenging Activity ◽  
Inhibition Activity ◽  
Tyrosinase Inhibition ◽  
Superoxide Scavenging Activity

Introduction: Kacangma (Leonurus sibiricus), turmeric (Curcuma longa) and black pepper (Piper nigrum) are the oldest and most important spice crops used for culinary purposes in Malaysia for centuries. Although many biological activities including antioxidant properties (AP) have been reported, there are no confirmed reports on the activities of this cocktail, nutri-Pepper enhancer. Purpose: The study evaluated the AP of the Nutri-Pepper enhancer in vitro. Methodology: The AP were evaluated using in vitro antioxidant assays where the total polyphenolic content (TPC), DPPH radical scavenging activity, tyrosinase inhibition activity, xanthine oxidase superoxide scavenging activity (XOD), and oxygen radical absorbance capacity (ORAC) were measured.  Results: Based on the antioxidant activity range, extract of Nutri pepper enhancer was high in tyrosinase inhibition activity, 87.16%, moderate in xanthine oxidase superoxide scavenging activity (XOD) 69.72% and low in 1,2-diphenyl-2- picrylhydrazyl radical scavenging activity (DPPH) 46.78%. On the other hand, the extract showed high ORAC and total phenolic content with the value of 236,00 µmol TE/100g and 282 mg/100 GAE. Conclusion: This finding proven that the consumption of this product can reduce or even eliminate the harmful effects on humans from contaminants in foods and from the environment; this is even more important for people living in polluted cities.

Superoxide scavenging activity in experimental liver transplantation

1995 ◽  
Vol 8 (4) ◽  
pp. 256-261 ◽  
Author(s):  
Masataka Negita ◽  
Itsuo Yokoyama ◽  
Shuji Hayashi ◽  
Takaaki Kobayashi ◽  
Motohiko Yasutomi ◽  
...  
Keyword(s):  
Liver Transplantation ◽  
Scavenging Activity ◽  
Superoxide Scavenging Activity ◽  
Experimental Liver

Xanthine oxidase and superoxide radicals in portal triad crossclamping-induced microvascular reperfusion injury of the liver

1996 ◽  
Vol 21 (2) ◽  
pp. 189-197 ◽  
Author(s):  
Markus J. Müller ◽  
Brigitte Vollmar ◽  
Hans-Peter Friedl ◽  
Michael D. Menger
Keyword(s):  
Reperfusion Injury ◽  
Xanthine Oxidase ◽  
Superoxide Radicals ◽  
Portal Triad

Superoxide Scavenging Activity in the Extracellular Space of the Brain in Forming Edema

Neurosurgery ◽  
1994 ◽  
Vol 35 (5) ◽  
pp. 924-929 ◽  
Author(s):  
Toru Fukuhara ◽  
Masaki Gotoh ◽  
Masamitsu Kawauchi ◽  
Shoji Asari ◽  
Takashi Ohmoto
Keyword(s):  
Extracellular Space ◽  
Scavenging Activity ◽  
Superoxide Scavenging Activity ◽  
The Brain
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