The total lipid contents and iodine value of fats had been determined in fish from two sections of the Zaporizke Reservoir (Ukraine) with different contamination levels. Research was conducted using the muscle and liver tissue samples from pike-perch (Sander lucioperca), european perch (Perca fluviatis), prussian carp (Carassius gibelio), roach (Rutilus rutilus) and rudd (Scardinius erythrophthalmus). Obtained data showed that at the contaminated zone, the total lipid contents were significantly (p ≤ 0.05) reduced in muscle tissue of pike-perch and european perch in comparison with the samples from “conventionally clean” lower section of the reservoir. Increased iodine value of fats in muscle tissue and liver tissue were detected in the predatory fish and both fish groups respectively. The research results could be used for estimation of the adaptation processes in freshwater fish as well as for indication of environmental contamination level in the natural and artificial reservoirs.
Oceniano wpływ ogrzewania oraz smażenia produktu wysoko skrobiowe go i produktu bogatobiałkowego na proces starzenia się olejów: słonecznikowego, rzepakowego i oliwy z oliwek poprzez oznaczenie i porównanie liczby kwasowej, liczby nadtlenkowej i liczby jodowej.