ANALYSIS OF 1-O-ALK-1-ENYLGLYCEROPHOSPHOLIPIDS OF ALBACORE TUNA (THUNNUS-ALALUNGA) AND THEIR ALTERATIONS DURING THERMAL-PROCESSING

被引：14
作者：
MEDINA, I
AUBOURG, SP
MARTIN, RIP
机构：
[1] Instituto Investigaciones Marinas, CSIC, 36208 Vigo
来源：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1993年 / 41卷 / 12期
关键词：
D O I：
10.1021/jf00036a034
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The qualitative and quantitative compositions of 1-O-alk-1-enylglycerolipids of albacore tuna (Thunnus alalunga) were studied along the canning process. Ether-linked lipids were found as 1-O-alk-1-enyl-2-acylglycerophospholipids (plasmalogens). They were studied by means of their dimethyl acetal (DMA) derivatives resulting from the transmethylation of lipid samples. DMA and fatty acid methyl esters could be simultaneously analyzed by gas chromatography using a polar fused silica capillary column (SP-2330). Three major 1-O-alk-1-enyl ether chains (16:0'', 18:0'', and 18:1'') were identified in albacore lipids using their mass spectre. Phosphatidylethanolamine showed the highest level in plasmalogen content (54.73%). The acyl composition of plasmalogens and diacylphospholipids was studied. During canning, the plasmalogen content showed a great decrease along the different steps of processing (raw, cooked, and sterilized). However, polyunsaturated fatty acids (PUFAs) from the polar fraction did not show any difference. These results suggest that alkenyl ethers are more susceptible to heat damage than PUFA and should be taken into account when damage in the lipid fraction during thermal processing is considered.
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页码：2395 / 2399
页数：5
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