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The acronym EPR describes a spectroscopic technique known as electron paramagnetic resonance.In several, especially older, textbooks and research papers the alternative names ESR(electron spin resonance) or EMR (electron magnetic resonance) can be sometimes encountered.The development of EPR spectroscopy was slowed during the few decades following its inventiondue to the unavailability of microwave...
Manganese plays a variety of roles in enzymes [1], such as for example arginase, which catalyzes the hydrolysis of arginine, forming urea and ornithine as products [2–4]. Given the biological accessibility of at least three oxidation states — MnII, MnIII, and MnIV — it is not surprising that manganese is also involved in important redox reactions [5]. Beside the well-known manganese superoxide dismutase...
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