Identification of Free Radicals Formed in Gamma-Irradiated Acetazolamide Using Electron Paramagnetic Resonance Spectroscopy

Measurement of Free Radicals Using Electron Paramagnetic Resonance Spectroscopy During Open Aorto-Iliac Arterial Reconstruction

BACKGROUND Aortic cross-clamping during abdominal aortic aneurysm (AAA) open repair leads to development of ischemia-reperfusion injury. Electron paramagnetic resonance spectroscopy (EPR) spin-trapping is a valuable method of direct measurement of free radicals. The objective of the study was to evaluate the results of EPR as a direct method of free radical measurement and degree of inflammator...

Characterization of free radicals in soluble coffee by electron paramagnetic resonance spectroscopy.

EPR spectra of soluble coffee display single-line free radical signals in both the solid state and aqueous solution, along with signals from the paramagnetic ions Fe(III) and Mn(II). The intensity of the free radical signal in the pure solid was estimated to be ca. 7.5 x 10(16) unpaired electrons/g, and there was no significant change on dissolution in water. In aqueous solutions, however, the ...

Quantitative detection of plasma-generated free radicals in liquids by electron paramagnetic resonance spectroscopy

This work focused on qualitative and quantitative detection of oxygen free radicals in liquids after plasma treatment with an atmospheric pressure argon plasma jet by electron paramagnetic resonance spectroscopy (EPR). For the treatment, a shielded plasma jet, where the active effluent zone is surrounded by a protective gas curtain was used.

Electron Paramagnetic Resonance Spectroscopy

Characterization and identification of gamma-irradiated sauces by electron spin resonance spectroscopy using different sample pretreatments.

Tomato ketchup, barbeque sauce, sweet chili sauce, and spaghetti sauce were gamma irradiated at 0, 1, 5, and 10 kGy. Electron spin resonance (ESR) technique was used to characterize the irradiated sauces, targeting radiation-induced cellulose radicals and using a modified sample pretreatment method. The samples were first washed with water, and then the residues were extracted with alcohol. The...