Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense, Ciudad Universitaria, 28040 Madrid, Spain.
Food Sci Technol Int. 2010 Aug;16(4):321-7. doi: 10.1177/1082013210366793.
Twenty-four castrated male (Duroc × Large Withe × Landrace) with an average weight of 69.4 kg were randomly distributed and located in individual cages and given the experimental diets. Diets were provided ad libitum and were formulated containing three levels of palm oil and hydropalm (hydrogenated palm stearine): 4% and 0% (low saturation), 2% and 2% (moderate saturation) and 0% and 4% (high saturation). Pigs were slaughtered at a local slaughterhouse with an average weight of 129.1 kg. The dietary treatment had no significant influence on growth performances and carcass characteristics. The diet saturation led to an increase of C18:0 and ΣSFA (saturated fatty acids) proportions and to a reduction of C18:1 n-9, C18:2 n-6 and ΣPUFA (polyunsaturated fatty acids) proportions and in subcutaneous backfat outer and inner layers. The dietary treatment affected significantly the melting point of subcutaneous backfat outer layer but had no significant influence on the melting point of the subcutaneous backfat inner layer. However, a linear effect of C18:0 proportion of subcutaneous backfat outer and inner layers on the melting point was observed. Dietary treatment had no significant effect on the main fatty acids pattern of intramuscular neutral and polar lipids from Longissimus dorsi muscle. In neutral lipids of liver a dietary influence (p < 0.05), but not a clear dose--response relationship, was observed for C16:0, C18:1 n-9, ΣSFA and ΣPUFA fatty acids, whereas in polar lipids the dietary treatment had no significant effect on the main fatty acids proportions. No effect of diet saturation was found on rheological properties of fat except for the hardness. The hardness was higher in the pigs that received the diet with 0% of palm oil and 4% hydropalm than in those given the diet with 4% of palm oil and 0% hydropalm.
24 头去势雄性（杜洛克×大白×长白），平均体重为 69.4kg，随机分布并放置在单独的笼子中，并给予实验日粮。日粮自由采食，并设计含有三种水平的棕榈油和氢化棕榈硬脂（氢化棕榈油）：4%和 0%（低饱和度）、2%和 2%（中饱和度）以及 0%和 4%（高饱和度）。猪在当地屠宰场以平均体重 129.1kg 屠宰。日粮处理对生长性能和胴体特性没有显著影响。日粮饱和度导致 C18:0 和ΣSFA（饱和脂肪酸）比例增加，C18:1 n-9、C18:2 n-6 和ΣPUFA（多不饱和脂肪酸）比例降低，皮下背膘外层和内层。日粮处理显著影响皮下背膘外层的熔点，但对皮下背膘内层的熔点没有显著影响。然而，观察到皮下背膘外层和内层 C18:0 比例与熔点之间存在线性关系。日粮处理对背最长肌肌肉中性和极性脂质的主要脂肪酸模式没有显著影响。在肝脏中性脂质中，观察到日粮处理（p<0.05）有影响，但没有明显的剂量-反应关系，C16:0、C18:1 n-9、ΣSFA 和 ΣPUFA 脂肪酸，而在极性脂质中，日粮处理对主要脂肪酸比例没有显著影响。除硬度外，日粮饱和度对脂肪流变学性质没有影响。接受 0%棕榈油和 4%氢化棕榈日粮的猪的硬度高于接受 4%棕榈油和 0%氢化棕榈日粮的猪。
