Kemijski i masnokiselinski sastav najduljeg leđnog mišića mlade simentalske junadi

Autor: Igor Štoković, Kristina Starčević, Ivo Karadjole, Dubravka Križanović, Pero Božić, Maja Maurić
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Veterinarski arhiv
Volume 83
Issue 2
ISSN: 1331-8055
0372-5480
Popis: The objective of this paper was to analyse the carcass characteristics (live weight at slaughter, hot and cold carcass weight, fat weight and fat ratio in cold carcass weight), chemical composition and fatty acid profile of the Simmental cattle longissimus dorsi muscle (MLD). The experiment was carried out on 20 young bulls (sons of sires in progeny testing for meat quality). The average live weight at slaughter (LWS) was 555 ± 12.47 kg, hot carcass weight (HCW) 332.6 ± 7.88 kg, cold carcass weight (CCW) 331.3 ± 8.43 kg, fat weight 15.9 ± 0.81 kg, fat ratio in CCW was 4.89 ± 0.23%. The average chemical composition of MLD was as follows: dry matter 24.84 ± 0.17%, water 75.16 ± 0.17%, protein 20.46 ± 0.26%, intramuscular fat 3.28 ± 0.06% and ash 1.11 ± 0.01%. Linear correlation was calculated for all parameters and high correlations were found between LWS, HCW and CCW, as expected, but there was no significant effect of LWS on the chemical composition of the longissimus dorsi muscle. Intramuscular fat (IMF) consisted on average of 48.04 ± 0.59%, 47.58 ± 0.71% and 4.16 ± 0.25% of total fatty acids (FA) as saturated fatty acids (SFA), mono unsaturated fatty acids (MUFA) and poly unsaturated fatty acids (PUFA), respectively. The PUFA/SFA ratio for beef was low, at around 0.1, similar to that reported by other authors. As expected, the level of MUFA correlated highly with the Δ9-desaturase (18) index (r = 0.84) and elongation index (r = 0.54). Statistically significant correlations between specific fatty acids, LWS, fat and IMF were generally weak. The percentages found of SFA and PUFA, as well as the PUFA/SFA ratio, were in accordance with results reported by other authors but still unfavourable for human health. To improve the unfavourable characteristics of beef, further study should include genetic parameters that affect the FA composition of beef beside the other factors mentioned above.
Istraživanjem smo htjeli utvrditi osobine trupova te kemijski i masnokiselinski sastav najduljega leđnog mišića simentalske junadi. U istraživanje je bilo uključeno 20 junadi. Utvrđena je prosječna masa živih životinja 555 ± 12,47 kg, masa toplih polovica 332,6 ± 7,88 kg, masa hladnih polovica 331,3 ± 8,43 kg, masa masti 15,9 ± 0,81 kg, omjer masti i mase hladnih polovica 4,89 ± 0,23%. Prosječan kemijski sastav MLD bio je: suha tvar 24,84 ± 0,17%, voda 75,16 ± 0,17%, protein 20,46 ± 0,26%, intramuskularna mast 3,28 ± 0,06% i pepeo 1,11 ± 0,01%. Izračunali smo linearne korelacije između promatranih obilježja te su pronađene visoke korelacije između mase živih životinja, mase toplih i hladnih polovica. No nije utvrđena značajna korelacija između mase živih životinja i kemijskog sastava MLD. U intramuskularnom masnom tkivu utvrđeno je 48,04 ± 0,59%, 47,58 ± 0,71% i 4,16 ± 0,25% zasićenih (SFA), mononezasićenih (MUFA) i polinezasićenih (PUFA) masnih kiselina. Omjer PUFA/SFA je nizak i iznosi oko 0,1 što je slično istraživanjima drugih autora. Očekivano je ukupna količina MUFA u visokoj korelaciji s indeksom Δ9-desaturaze (18) (r = 0,84) i indeksom elongacije (r = 0,54). Utvrđene su slabe, iako statistički značajne korelacije između pojedinih masnih kiselina, mase živih životinja, ukupne i intramuskularne masti. Utvrđeni rezultati za SFA i PUFA, kao i P/S omjer u skladu su s rezultatima drugih autora no i dalje nepovoljni za ljudsko zdravlje.
Databáze: OpenAIRE
Externí odkaz: