The superoxide scavenging activity of lyophilized extract of Sempervivum tectorum (StF1) was determined by electron paramagnetic resonance spin trapping methods. The extract inhibited ascorbic acid induced and FeCl3 stimulated lipid peroxidation and was concentration dependent in the liver microsomal fraction of rats.
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Blázovics et al. (1993) studied this question.
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