| 摘要: |
| 【目的】 研究绵羊品种对其脂肪组织中挥发性脂肪酸（C4~C10）组成的影响，为深入研究羊肉膻味的形成机理奠定基础。【方法】 采用同时蒸馏萃取和气相色谱技术，对小尾寒羊、滩羊和同羊皮下脂肪组织中的挥发性脂肪酸进行了定量分析。【结果】 采用同时蒸馏萃取和气相色谱技术可在绵羊脂肪组织中检测到对羊肉膻味贡献较大的4 甲基辛酸和4 甲基壬酸。小尾寒羊、滩羊和同羊的总挥发性脂肪酸含量分别为261.109,169.124和271.898 mg/kg；其中直链脂肪酸含量分别为217.792，143.036 和229.059 mg/kg，支链脂肪酸含量分别为43.317，26.088 和42.839 mg/kg。4 甲基辛酸和4 甲基壬酸是对羊肉膻味贡献较大的挥发性脂肪酸，其在小尾寒羊、滩羊、同羊脂肪组织中的含量分别为20.317 和9.772,14.150 和5.597 ，12.835 和6.403 mg/kg。【结论】 应用此方法可以检测到对羊肉膻味有主要作用的挥发性脂肪酸，且不同绵羊品种对其脂肪组织中挥发性脂肪酸的组成有一定影响，小尾寒羊脂肪组织中4 甲基辛酸和4 甲基壬酸含量有大于滩羊和同羊的趋势。 |
| 关键词: 绵羊品种 挥发性脂肪酸 支链脂肪酸 |
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| 基金项目:国家公益性行业科研专项“奶山羊良种繁育及产业技术体系建立”(nyhyzx07-037) |
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| Effect of breeds on volatile fatty acids composition in sheep adipose tissue |
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GUO Wei jie1 2 WANG Jia qi1 WANG Jing1 BU Deng pan1 ZHANG Jun yu1 2 SONG Zeng ting1
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| Abstract: |
| 【Objective】 In order to explain mechanism of mutton odor,the trail studied effect of sheep breed on volatile fatty acids concentration in adipose tissue.【Method】 The study used simultaneous distillation and extraction and gas chromatographic to determine volatile fatty acids of adipose tissue from Little Tail Han sheep,Tan sheep and Tong sheep.【Result】 Using simultaneous distillation and extraction and gas chromatographic,were detected 4 methyloctanoic acid and 4 methylnonanoic acid in sheep adipose tissue,which have important role in mutton odor.The result showed that the total concentration of volatile fatty acid of Little Tail Han sheep,Tan sheep and Tong sheep was 261.109,169.124 and 271.898 mg/kg,respectively.Among them,total volatile straight fatty acid was 217.792，143.036 and 229.059 mg/kg,and total branched fatty acid 43.317,26.088 and 42.839 mg/kg.In branched chain fatty acids,the concentration of 4 methyloctanoic acid and 4 methylnonanoic acid was 20.317 and 9.772 mg/kg,higher than 14.150 and 5.597 mg/kg of Tan sheep and 12.835 and 6.403 mg/kg of Tong sheep.【Conclusion】 The method was satisfactory for determination of volatile fatty acids of sheep adipose tissue.The concentrations of 4 methyloctanoic acid and 4 methylnonanoic acid of Little Tail Han sheep were higher than that of Tan sheep and Tong sheep. |
| Key words: sheep breed volatile fatty acid branched chain fatty acid |
