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For the first time, the superoxide anion radical was formed by electrochemical reduction of oxygen and detected in situ by EPR spectroscopy without changing the temperature. The spin susceptibilities of solid superoxide solutions were measured between 280 and 4 K showing Curie behavior. The EPR results were explained in the frame of an ion association and support the formation of a loose ion pair between the superoxide anion radical and the potassium crown ether complex. An alternative explanation for the large EPR line width of the superoxide anion radical at higher temperatures is given.
Leibniz Institute for Solid State and Materials Research IFW Dresden , PF 270116, D-01171 Dresden, Germany.
This article was published in the following journal.
Name: The journal of physical chemistry. B
The alkali-insoluble (1→3)-β-D-glucan (PJ) was extracted from yeast cell wall by acid-base method. The sulfated glucan (S-PJ), carboxymethylated glucan (CM-PJ), phosphorylated glucan (P-PJ), carbox...
Although o-quinonemethide (6-methylene-2,4-cyclohexadien-1-one) has been proposed as a key intermediate in char formation during the pyrolysis of guaiacol (2-methoxyphenol), direct evidence of this (e...
The carbonate radical anion CO3(●-) is a key intermediate in tropospheric anion chemistry. Despite its radical character, only a small number of reactions have been reported in the literature. Here ...
Control of the structural type in metallic enantiopure and racemic radical cation salts is achieved through hydrogen bonding interactions between the chiral donor DM-EDT-TTF and the XF6 anions (X = P,...
The phytochemical study of Stereocaulon montagneanum harvested in Sumatra (Indonesia) led to the isolation of 11 known compounds including two metabolites not previously described in the genus Stereoc...
When exposed to oxygen immediately after birth, newborns suffer from an oxidative stress with a significant decrease in serum concentration of the anti-oxidant enzyme superoxide dismutase....
In this observational cost efficacy study, the investigator compare the Laparoscopic Radical Prostatectomy (LRP) versus Robotic-Assisted Laparoscopic Prostatectomy (RALP). Every cost of ca...
The purpose of this study is to conduct a Phase I clinical trial involving in situ RTVP-1 gene therapy for prostate cancer. We will conduct necessary safety evaluations on a new adenoviru...
Radical prostatectomy and radical radiation therapy remain the standard treatment approaches for patients with clinically localized prostate cancer (T1, T2).Radical prostatectomy is most e...
To evaluate the short-term changes in ocular surface measures and tear inflammatory mediators after lenticule extraction (FLEx), laser in situ keratomileusis (LASIK) and femtosecond laser-...
A flavoprotein enzyme that catalyzes the univalent reduction of OXYGEN using NADPH as an electron donor to create SUPEROXIDE ANION. The enzyme is dependent on a variety of CYTOCHROMES. Defects in the production of superoxide ions by enzymes such as NADPH oxidase result in GRANULOMATOUS DISEASE, CHRONIC.
An oxidoreductase that catalyzes the reaction between superoxide anions and hydrogen to yield molecular oxygen and hydrogen peroxide. The enzyme protects the cell against dangerous levels of superoxide. EC 22.214.171.124.
A potent oxidant synthesized by the cell during its normal metabolism. Peroxynitrite is formed from the reaction of two free radicals, NITRIC OXIDE and the superoxide anion (SUPEROXIDES).
A technique that labels specific sequences in whole chromosomes by in situ DNA chain elongation or PCR (polymerase chain reaction).
The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.