[The antiradical activity of plant extracts and healthful preventive combinations of these exrtacts with the phospholipid complex].

Using the chemiluminescence method, the effective concentration of antioxidants (AO) and its reactivity toward peroxyl radicals (ARA, the k7 constant) have been measured for 13 plant extracts. In fact all extracts demonstrated ARA higher than ionol. Larix dahurica, Hypericum perforatum, Potentilla fruticosa, Aronia melanocarpa and Rhaponticum carthamoides extracts showed the highest values of ARA.

[Anti-radical activity and oxidative stability of oils manufactured from flax, sesame and silybum seeds].

Comparative analysis of oils, prepared from flax, sesame and silybum seed composition, and adequate oil blends, prepared by mixing flax oil, sesame oil and silybum oil was performed. Antiradical activity was evaluated for the oils, both for their methanol-soluble phase and the fraction insoluble in methanol. DPPH radical scavenging activity expressed in Trolox equivalent antioxidant capacity.

[Antioxidant activity of vegetable oils with various omega-6/omega-3 fatty acids ratio].

Antioxidant activity and the oxidative stability were investigated in flax, sesame, silybum oils and oils with different omega-6/omega-3 fatty acid ratio. The content of antioxidants (AO) in crude oils and their reactivity towards peroxyl radicals were studied using kinetic method for addition of oil in a model reaction of cumol oxidation. There were correlations between PUFA/omega-9 and thermal stability (50 degrees C); between gamma-tocopherol content and resistantance to oxidative changes after storage at (10 +/- 2) degrees C for 6 months.

[Antiradical activity and resistance of flaxseed oil enriched with the antioxidants to oxidative changes].

Using the chemiluminescence technique, the effective concentration of antioxidants (AO) and its reactivity towards peroxyl radicals (constant k7) have been measured for the oil "Ubicato-flax" (biological active supplement) and flaxseed oil, enriched with Aronia melanocarpa extract. Ubicato-flax exhibited the highest antiradical activity but it was less resistant to oxidative changes as compared with flaxseed oil + extract. Ubicato oil produced on basis of natural AO exhibited higher antiradical activity in comparison with Ubicato oil produced on basis of the chemical synthetic AO.

[Biological effects of the soybean phospholipids].

Soyabean phospholipids, particularly commercial lecithin, are now widely used as biological active food additives. Mechanisms of their activities are based mainly on their similarity with ow phospholipids of biomembranes and blood lipoproteins. The similarity allows the inclusion of plant phospholipids into these structures and promotes prevention of number of pathological processes.