Effects of Freezing and Frozen Storage on Protein Functionality and Texture of Some Cephalopod Muscles |
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| Authors: | Nalan Gokoglu Osman Kadir Topuz Pinar Yerlikaya Hanife Aydan Yatmaz Ilknur Ucak |
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| Institution: | 1. Fisheries Faculty, Akdeniz University, Antalya, Turkeyngokoglu@akdeniz.edu.tr;3. Fisheries Faculty, Akdeniz University, Antalya, Turkey;4. Food Safety and Agricultural Research – Development Center, Akdeniz University, Antalya, Turkey;5. Faculty of Agricultural, Sciences, and Technologies, ?merHalisdemir University, Nigde, Turkey |
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| Abstract: | The aim of this study was to investigate the effects of freezing and frozen storage on protein functionality and texture of squid (Loligo vulgaris), octopus (Octopus vulgaris), and cuttlefish (Sepia officinalis) muscles. Squid, octopus, and cuttlefish samples were cut into pieces of 4 × 4 cm. These pieces were packed in polyethylene bags. The bags were frozen in a blast freezer at ?45°C until the thermal center reached ?18°C. Frozen samples were stored in a deep freezer at ?18°C for 30 days. After freezing and during frozen storage, total soluble protein and water holding capacity decreased and total free amino acid and cooking loss increased in all cephalopod muscles. According to instrumental texture analysis results, freezing and frozen storage affected textural characteristics of squid and cuttlefish but not of octopus. Sensory hardness and chewiness values of all cephalopods increased after freezing, but elasticity values did not change. There were no significant differences between storage days in hardness values of squid and octopus. However, significant differences in hardness values of cuttlefish were observed between the 1st day of storage and the last day. |
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| Keywords: | Cuttlefish freezing frozen storage octopus squid texture |
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