Continuous or extremely intensive stress causes the activation of "primary toxins". Active forms of oxygen are referred to those. Increased intensity of free radicals oxidation gives rise to the formation of multiple free radicals causing peroxidation of lipids and development of oxidative stress. Activated oxygenic metabolites (superoxide radical, hydrogen peroxide, etc.) have a damaging effect at tissue and cell level.
Lipids are a major source of energy for a newborn. Lipolysis activation results in a considerably increased concentration of free fatty acids. They are substrates for lipids peroxide oxidation and determine its intensity.
The lipids peroxidation processes run at a maximal rate in animals during the first days of their life. The transition of organism to the aerobic type of respiration encourages oxygenation of tissues. Proviso, the increased generation of oxygenic metabolites results from adaptive reactions and this activates the processes of the peroxide oxidation of lipids.
Investigations were carried out at Closed Joint Stock «Landrace» in Novosibirsk region. Landrace pigs were the objects of the investigations. The animals were selected and grouped by the principle of analogues with regard to origin, breed, productivity, age and live weight. The pigs were kept following the technology for complexes and farms. The blood to examine was taken from aural vein. The content of free fatty acids was examined in the blood serum of the pigs aged 1, 2, 3, 4, 5 months. Statistical processing of the data was done with the package of applied software Statistica 6 and Excel.
The maximal content of free fatty acids was found in the blood serum of one month piglets (59,66 %, p < 0,001) that testifies to lipolysis present in the pigs in early postnatal development.
The work was submitted to international scientific conference «Fundamental research», Israel (Tel Aviv), 16-23 October, 2011, came to the editorial office on 19.10.2011.