Chemical Composition and Texture of Commercial Geoduck Clams (Panopea abrupta) Harvested in Southeast Alaska
Chemical Composition and Texture of Commercial Geoduck Clams (Panopea abrupta) Harvested in Southeast Alaska
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DOI：
10.2983/035.030.0316
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
A. C. M. Oliveira;P. Bechtel;D. Nguyen;L. Gurer;C. Crapo;Q. Fong;R. Ralonde
中科院分区：
文献类型：
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作者：
A. C. M. Oliveira;P. Bechtel;D. Nguyen;L. Gurer;C. Crapo;Q. Fong;R. Ralonde
摘要本研究的目的是确定在阿拉斯加东南部收获的商业规模的象拔蚌蛤的虹吸管和外套膜的化学成分，并测量这两种肌肉组织之间的质地差异，将它们与冷冻对应物进行比较。使用标准工业实践处理活的象拔蚌，并在新鲜或冷冻储存90天后进行分析。地幔在成分和质地上与虹吸管明显不同。地幔有显着较高的碳水化合物和脂质含量，而虹吸管有较高的水分含量。组织间蛋白质含量相似，但虹吸管中的可溶性蛋白质含量显著高于套膜。在收缩虹吸管的电泳图谱中观察到了很大的差异，收缩虹吸管比地幔具有更丰富的高分子量蛋白质。在硬度和剪切能方面也存在纹理差异，虹吸管的值明显高于地幔。冻结后，地幔的硬度值显着增加，这一发现与东南阿拉斯加象拔蚌处理器的观测结果一致。总的来说，记录的组成和质地的差异是相称的解剖功能的虹吸管和地幔活象拔蚌蛤。
ABSTRACT The objectives of this study were to determine chemical composition of the siphon and the mantle of commercialsize geoducks clams harvested in Southeast Alaska, and to measure textural differences between the two muscle tissues, comparing them with their frozen counterparts. Live geoducks were processed using standard industry practices and analyzed either fresh or after 90 days of frozen storage. The mantle significantly differed in composition and texture from the siphon. The mantle had significantly higher contents of carbohydrates and lipids, whereas the siphon had a higher moisture content. Protein content was similar between tissues, but soluble protein content in the siphon was significantly higher than in the mantle. Large differences were observed in the electrophoretic profiles of the contractile siphon, which had a greater abundance of higher molecular weight proteins than the mantle. There were also textural differences in hardness and shear energy, with the siphon presenting significantly higher values than the mantle. After freezing, hardness values for the mantle significantly increased, and this finding is in line with Southeast Alaska geoduck processor observations. Overall, the composition and textural differences recorded are commensurate with differences in anatomic functions of the siphon and the mantle in live geoduck clams.