Changes of fatty acids composition in gonad of Chinese mitten crab(Eriocheir sinensis) during heating process
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摘要: 利用GC-MS测定中华绒螯蟹性腺中脂肪酸组成,系统考察不同加热时间对中华绒螯蟹性腺中脂肪酸组成变化的影响。研究得出:中华绒螯蟹性腺内主要为长链脂肪酸,其中C18∶1n-9c的含量最高,且不饱和脂肪酸含量大于饱和脂肪酸含量。在蒸煮时间变化范围内,其脂肪酸呈现出较为一致的变化规律,饱和脂肪酸呈上升趋势,多不饱和脂肪酸呈下降趋势,而单不饱和脂肪酸呈波动趋势,其中变化最大的为雄蟹中的C18∶3n-6及C22∶1n-9,分别在60 min和90 min时,比生鲜样品下降了82.22%和82.52%。实验表明雄蟹性腺在对风味的研究上,具有更高的研究价值。
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关键词:
- 气相色谱-质谱法(GC-MS) /
- 加热过程 /
- 脂肪酸 /
- 中华绒螯蟹 /
- 风味
Abstract: The changes of fatty acid composition in gonad of female and male Chinese mitten crab( Eriocheir sinensis) at different cooking time were investigated by gas chromatography- mass spectrometry.The results showed that long chain fatty acids were the main part of gonad,most of the amount was C18 ∶ 1n- 9c,and the amount of unsaturated fatty acids was larger than saturated fatty acids. During cooking,the fatty acids changed consistently.The saturated fatty acids showed a rising trend,the polyunsaturated fatty acids showed a downward trend,while the monounsaturated fatty acids changed fluctuating.The data indicated that C18∶ 3n-6 and C22∶ 1n-9were declined by 82.22% and 82.52% at the time of 60 min and 90 min,respectively compared with the raw sample. From the flavor point of view,the gonad of male Chinese mitten crab has great value in study and research. -
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