Superoxide Anion Generation via Electron-Transfer Oxidation of Catechin Dianion by Molecular Oxygen in an Aprotic Medium

2001 ◽  
Vol 30 (11) ◽  
pp. 1152-1153 ◽  
Author(s):  
Ikuo Nakanishi ◽  
Kiyoshi Fukuhara ◽  
Kei Ohkubo ◽  
Tomokazu Shimada ◽  
Hisao Kansui ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Molecular Oxygen ◽  
Superoxide Anion ◽  
Superoxide Anion Generation ◽  
Aprotic Medium

ChemInform Abstract: Superoxide Anion Generation via Electron-Transfer Oxidation of Catechin Dianion by Molecular Oxygen in an Aprotic Medium.

ChemInform ◽  
2010 ◽  
Vol 33 (11) ◽  
pp. no-no
Author(s):  
Ikuo Nakanishi ◽  
Kiyoshi Fukuhara ◽  
Kei Ohkubo ◽  
Tomokazu Shimada ◽  
Hisao Kansui ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Molecular Oxygen ◽  
Superoxide Anion ◽  
Superoxide Anion Generation ◽  
Aprotic Medium

scholarly journals RuIII(edta) complexes as molecular redox catalysts in chemical and electrochemical reduction of dioxygen and hydrogen peroxide: inner-sphere versus outer-sphere mechanism

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21359-21366
Author(s):  
Debabrata Chatterjee ◽  
Marta Chrzanowska ◽  
Anna Katafias ◽  
Maria Oszajca ◽  
Rudi van Eldik
Keyword(s):  
Hydrogen Peroxide ◽  
Electron Transfer ◽  
Electrochemical Reduction ◽  
Molecular Oxygen ◽  
Outer Sphere ◽  
Transfer Processes ◽  
Edta Complexes ◽  
Inner Sphere ◽  
Electron Transfer Processes ◽  
Sphere Mechanism

[RuII(edta)(L)]2–, where edta4– =ethylenediaminetetraacetate; L = pyrazine (pz) and H2O, can reduce molecular oxygen sequentially to hydrogen peroxide and further to water by involving both outer-sphere and inner-sphere electron transfer processes.

Mechanism of superoxide anion generation in the toxic red tide phytoplankton Chattonella marina: possible involvement of NAD(P)H oxidase

2000 ◽  
Vol 1524 (2-3) ◽  
pp. 220-227 ◽  
Author(s):  
Daekyung Kim ◽  
Atsushi Nakamura ◽  
Tarou Okamoto ◽  
Nobukazu Komatsu ◽  
Tatsuya Oda ◽  
...  
Keyword(s):  
Superoxide Anion ◽  
Red Tide ◽  
Chattonella Marina ◽  
Superoxide Anion Generation

scholarly journals An Anti-Inflammatory 2,4-Cyclized-3,4-Secospongian Diterpenoid and Furanoterpene-Related Metabolites of a Marine Sponge Spongia sp. from the Red Sea

Marine Drugs ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 38
Author(s):  
Chi-Jen Tai ◽  
Chiung-Yao Huang ◽  
Atallah F. Ahmed ◽  
Raha S. Orfali ◽  
Walied M. Alarif ◽  
...  
Keyword(s):  
Red Sea ◽  
Superoxide Anion ◽  
Dermal Fibroblast ◽  
Fibroblast Cell ◽  
Inhibitory Effect ◽  
Human Dermal Fibroblast ◽  
Superoxide Anion Generation ◽  
Potent Inhibitory Effect ◽  
Anti Inflammatory ◽  
New Compounds

Chemical investigation of a Red Sea Spongia sp. led to the isolation of four new compounds, i.e., 17-dehydroxysponalactone (1), a carboxylic acid, spongiafuranic acid A (2), one hydroxamic acid, spongiafuranohydroxamic acid A (3), and a furanyl trinorsesterpenoid 16-epi-irciformonin G (4), along with three known metabolites (−)-sponalisolide B (5), 18-nor- 3,17-dihydroxy-spongia-3,13(16),14-trien-2-one (6), and cholesta-7-ene-3β,5α-diol-6-one (7). The biosynthetic pathway for the molecular skeleton of 1 and related compounds was postulated for the first time. Anti-inflammatory activity of these metabolites to inhibit superoxide anion generation and elastase release in N-formyl-methionyl-leucyl phenylalanine/cytochalasin B (fMLF/CB)-induced human neutrophil cells and cytotoxicity of these compounds toward three cancer cell lines and one human dermal fibroblast cell line were assayed. Compound 1 was found to significantly reduce the superoxide anion generation and elastase release at a concentration of 10 μM, and compound 5 was also found to display strong inhibitory activity against superoxide anion generation at the same concentration. Due to the noncytotoxic activity and the potent inhibitory effect toward the superoxide anion generation and elastase release, 1 and 5 can be considered to be promising anti-inflammatory agents.

Capping of silver nanoparticles by anti-inflammatory ligands: Antibacterial activity and superoxide anion generation

2019 ◽  
Vol 193 ◽  
pp. 100-108 ◽  
Author(s):  
Manuel I. Azócar ◽  
Romina Alarcón ◽  
Antonio Castillo ◽  
Jenny M. Blamey ◽  
Mariana Walter ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Superoxide Anion ◽  
Superoxide Anion Generation ◽  
Anti Inflammatory

κ-Opioid Modulation of Human Microglial Cell Superoxide Anion Generation

1998 ◽  
Vol 56 (3) ◽  
pp. 285-288 ◽  
Author(s):  
Shuxian Hu ◽  
Phillip K Peterson ◽  
Chun C Chao
Keyword(s):  
Superoxide Anion ◽  
Microglial Cell ◽  
Superoxide Anion Generation
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