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Conjugated Linoleic Acid 가 Myoglobin 의 산화안정성에 미치는 효과
박구부,진상근,주선태,예병화,이정일,문성실 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.6
Animal fed CLA have been reported to have reduced weight loss, improved growth and increased lean body mass. In this study, we have hypothesized that CLA prohibits myoglobin oxidation due to delay lipid oxidation, so that meat color could be improved during cold storage. Two trials were conducted to investigate the relationship between CLA and myoglobin oxidation. For the first trial, a total of 48 pigs were fed a diet including 5% CLA for 4 weeks before slaughter, and meat color (CIE L*, a*, b*) and lipid oxidation (TEARS; thiobarbituric acid reactive substances) were measured during 11 days of cold storage at 4℃. The simple correlation coefficients between CLA and a* value and TBARS were -0.283 (p=0.180) and -0.804 (p$lt;0.0001), respectively. This result suggested that CLA could reduce effectively the lipid oxidation, but had only a small effect on meat color. For the second trial, we made beef patties including 0.5%, 1% and 2% CLA, and the changes in meat color and oxymyoglobin concentration were investigated during 13 days of cold storage. The L* value increased with increasing the CLA level in patties, and the a* value of 1% and 2% CLA added patty was higher than others. Also, oxymyoglobin concentration was not quickly decreased with higher levels of CLA. These results imply that CLA could prevent the oxidation of myoglobin due to delay of the lipid oxidation.
김동훈,박구부,이제룡,주선태,문성실,김곤섭 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.5
Changes in blood profile of pigs during transport and lairage were investigated. Six 110㎏ pigs(Landrace) were transported to slaughter house in a commercial livestock lorry for 1.5 hr then held in lairage for 3 hrs. Blood samples were taken from each pig at four times, pre-loading(pense), immediately after loading, immediately after transport and after 3 hrs lairage for analysis of blood profile. Cortisol and β-endorphin concentrations of immediately after transport were significantly higher (p$lt;0.45) than immediately after loading and pre-loading, but were significantly reduced (p$lt;0.05) by 3 hrs lairage to level of pre-loading. There were no differences in CPK (creative phosphokinase) levels between immediately after loading and transport, but the CPK levels were significantly higher (p$lt;0.05) than those of pre-loading. Also the CPK levels were significantly reduced by 3 hrs lairage, so that the CPK levels after 3 hrs lairage were not significantly different with that of pre-loading. These results suggested that pigs could have a physical stress during loading and physiological stress during transportation, and the stress could be recovered for 3 hrs of lairage. There were significant relationships between cortisol and β-endorphin (r=0.45, p$lt;0.05), CPK and β-endorphin (r=0.67, p$lt;0.01), LDH (lactate dehydrogenase) and CPK (r=0.67, p$lt;0.01).