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Effect of Gamma Irradiation and Modified Atmosphere Packaging on the Shelf-Life of White Shrimp (Metapenaeus Affinis)
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نویسنده
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Mehrzadeh Sh. ,Roomiani L.
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منبع
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Iranian Journal Of Fisheries Sciences - 2021 - دوره : 20 - شماره : 4 - صفحه:1004 -1021
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چکیده
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This study attempts to investigate the variations in ph, thiobarbituric acid (tba), total volatile basic nitrogen (tvbn), free fatty acids (ffa), colorimetric parameters (l*, a*, b*), total viable bacterial count (tvc) and textural profile analysis as a function of storage time to evaluate the effect of gamma irradiation (0, 1, 3, 5, 7 kgy) and modified atmosphere packaging (map) on the shelf life of white shrimp (metapenaeus affinis) stored for 15 days at 4 ordm;c. compared to the control group, increasing radiation dose (up to 7 kgy) and storage time (up to 15 days) led to an increase in ph index (p< 0.05). tba, ffa and tvc increased with higher radiation dose and storage time. prolong the storage time, increased the tvbn to the end of the fifteenth day, while higher gamma doses from 0 to 7 kgy reduced the tvbn content (p< 0.05). according to the results obtained from comparing colorimetric parameter, increasing radiation dose did have an influence on l*, a* and b* indices of shrimp samples. furthermore, increasing the storage time (p< 0.05) reduced l* and b* index while increased a*. increasing the gamma radiation and storage time reduced the hardness and chewiness treated shrimp samples (p< 0.05). based on the microbiological and chemical results, the optimal storage time for shrimp under various radiation doses was measured in 7 kgy treatment and on day 12. this treatment could improve the storage time by 6 days compared to the control treatment.
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کلیدواژه
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Gamma Irradiation ,Shelf-Life ,Modified Atmosphere Packaging ,Metapenaeus Affinis
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آدرس
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Islamic Azad University, Ahvaz Branch, Department Of Food Science And Technology, Iran, Islamic Azad University, Ahvaz Branch, Department Of Fisheries, Iran
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پست الکترونیکی
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l.roomiani@yahoo.com
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Authors
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