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The effect of dietary linseed and lucerne supplementation on the oxidative stability of ostrich meat expressed by changes in concentrations of malondialdehyde (MDA) and glutathione (GSH), and in activity of superoxide dismutase (SOD), was studied. The feeding regimens were as follows: C - control group, L - 4% supplement of linseed, L-L45, L-L55, L-L65, and L-L75 - 4% supplement of linseed and supplement...
The aim of the study was to evaluate the influence of the diet enriched with linseed on morphometric, densitometric and mechanical properties of tibio-tarsus and tarso-metatarsus in 14-month-old ostriches. The experimental diet including 4% of linseed was applied to ostriches (N=8) starting from the attainment of 45 kg of body weight, while the control birds (N=8) were fed the standard diet. At the...
The aim of the study was to evaluate physical traits and fatty acids profile of ostrich meat enriched in n3 fatty acids as affected by refrigerated storage (for 14 days) and type of packaging (VAC vs. skin-packaging – SP). During refrigerated storage time drip loss after 7 days was significantly (P<0.001) higher in VAC as compared to SP samples. No significant differences in the SFA content in...
The aim of this study was to evaluate the effects of somatic cell count and the polymorphic form of β4-defensin on the concentration of free fatty acids (FFA) and physico-chemical characteristics of cow’s milk. The study was carried out on 120 Polish Holstein-Friesian Black and White dairy cows.The animals were maintained in a loose barn and fed with the TMR system according to the INRA norm. The...
The relationship between blood lipid indicators, subcutaneous and intramuscular fat contents and with the concentration of omega-3 fatty acids in the musculus longissimus dorsi (MLD) was investigated to search for biomarkers specifically associated with one of these relationships. The study was carried out on 32 gilts growing from 60 to 105 kg body weight (BW). The pigs were fed control (C) or experimental...
The aim of the study was to assess the activity of lysosomal enzymes: aminopeptidases, including alanine aminopeptidase (AlaAP), leucine aminopeptidase (LeuAP), arginine aminopeptidase (ArgAP), and glycosidases, such as ß-galactosidase (BGAL), ß-glucuronidase (BGRD), ß-glucosidase (BGLU), N-acetyl-ß-hexosaminidase (HEX), α-glucosidase (AGLU) and α-mannosidase (MAN) in the liver of ostriches (n = 80)...
Forty ostriches were raised in five groups [control (C) or with 4% (L4) or 8% (L8) linseed, or 5% (R5) or 10% (R10) rapeseed in the diet]. Linseed supplementation (L4 and L8) improved the nutritive value of the ostrich meat by increasing (P<0.001) the α-linolenic acid content (>4.2%FAtotal) and PUFA/SFA ratio (>1.0) as compared with the control group (1.7% FAtotal and <0.94, α-linolenic...
The aim of the study was to determine the effect of linseed and rapeseed dietary supplementation on the fatty acids profiles of two ostrich fat depots: breast and subcutaneous (above the leg). The study was carried out on 40 ostriches raised in five groups – control (C) or with 4% (L4) or 8% (L8) linseed, or 5% (R5) or 10% (R10) rapeseed in the diet, from hatching to 12 months of age. Fat samples...
Pigs of Pietrain (P) and Polish Synthetic line of 990 (S) were slaughtered at 25, 70, 90, 110 and 130 kg BW and the chemical composition of musculus longissimus dorsi and its fatty acid profiles were determined. The Pietrain pigs were characterised by lower (P<0.01) concentration of intramuscular fat, total SFA (P<0.05) and MUFA (P<0.01) than pigs of the synthetic line 990 at each BW (P<0...
The study was conducted on 36 female Pharaoh quails (3 groups, 12 birds per group). The experiment covered the 7th to the 20th weeks of birds’ lives. The control group (I) received standard feed formulated for adult quails. Groups II and III received standard feed with 4% and 7% of amaranth seeds, respectively. All feeds were isoproteinous and isocaloric. At the age of weeks 20, 12 females were randomly...
Casein is the predominant protein in milk of almost all mammalian species. The goat casein fractions (αₛ₁-, β-, αₛ₂-, κ-casein) are coded by the single autosomal genes CSN1S1, CSN2, CSN1S2, and CSN3, which cluster in a DNA segment of about 250 kbp, mapped to chromosome 6. All casein fractions are characterized by high variability. At the four loci, “normal” alleles are associated with a normal or...
The aim of this study was to analyse the impact of heat treatment methods (frying – FR, grilling –GR, roasting – RO 180°C, roasting – RO ΔT) on certain physical properties and the cooking yield of selected muscles of cattle. Used were samples of five muscles from 40 beef carcasses: m. longissimus lumborum (LL), m.semimembranosus (SEM), m. semitendinosus (SET), m. psoas major (PSM) and m. triceps brachii...
Free radicals are natural final products of the intensive metabolism in cells located in organism high-yielding dairy cows. When the disturbing of homeostasis occurs, oxidative processes lead to oxidative stress which in high-yielding dairy cows cause inflammation of the mammary gland (mastitis). The inflammation can cause the reduction of milk yield and unfavourable changes in the milk composition,...
The aim of the study was to evaluate the effect of the dietary linseed and rapeseed supplements on the physico-chemical and sensory properties of ostrich meat. The experiment was carried out on forty growing ostriches raised in five groups (control and with 4 and 8% linseed and 5 and 10% rapeseed of the diet). The diet with rapeseed did not affect the physico-chemical properties of meat,while 4% linseed...
The last 4 weeks of pregnancy and the first 4 weeks of lactation, known as the transition or periparturient period, is a highly critical period for dairy cows. Because their defense mechanisms are often insufficient against the intense action of numerous physiological and environmental factors, especially high-yielding dairy cows are the most susceptible to oxidative stress in this period. The increased...
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