علوم زیستی دریا
Mahnosh Khosravizadeh; Laleh Roomiani
Abstract
In this study changes chemical compounds and textural, color and sensory properties were measured to investigate the shelf-life of the whole, gutted and filleted yellow fin Seabream (Acanthopagrus latus) in modified atmosphere packaging (MAP) (45% CO2, 50% N2 and 5% O2) during frozen condition in 4 months ...
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In this study changes chemical compounds and textural, color and sensory properties were measured to investigate the shelf-life of the whole, gutted and filleted yellow fin Seabream (Acanthopagrus latus) in modified atmosphere packaging (MAP) (45% CO2, 50% N2 and 5% O2) during frozen condition in 4 months storage. Results showed that no significant different in protein, ash and moisture contents were observed (p> 0.05). The lowest fat content (2.67 % ± 0.1%) was observed in sample containing the whole fish (p< 0.05). In all treatments the WHC was showed a significant decrease during storage time (p< 0.05) and the lowest value was found in gutted and filleted samples (22.1 % ± 0.39 and 22.34 % ± 0.34%, respectively). The results also showed a significant decrease in textural properties (including hardness, resilience, cohesiveness, gumminess and chewiness) compared with initial values (p< 0.05). However, the lowest values of these factors were found in whole fish samples. Evaluation of the color showed a significant increase in factor b* as well as decrease in factors a* and L* during storage. The results in all treatments revealed a significant decrease in sensory factors; however gutted and filleted fish in MAP packaging were judged to be more acceptable than whole fish samples. Considering of textural, color and sensory properties, it seems that filleting and gutting fish compared with whole fish samples resulted in better quality in MAP packing under frozen storage.
علوم زیستی دریا
j e; l r; a gh
Abstract
This study was conducted in order to bioaccumulation of heavy metals Zn, Cu, Cd and Pb in shell and muscle of white shrimp native species of Khouzestan Province in summer and winter of 2013, 80 samples were collected from station of Bahrekan in coast of Hendijan, West-North of Persian Gulf. Then Biometry ...
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This study was conducted in order to bioaccumulation of heavy metals Zn, Cu, Cd and Pb in shell and muscle of white shrimp native species of Khouzestan Province in summer and winter of 2013, 80 samples were collected from station of Bahrekan in coast of Hendijan, West-North of Persian Gulf. Then Biometry and preparation of shell and muscle samples, metals were extracted using acid digestion method and concentration of heavy metals was measured by Atomic Absorption Spectrophotometer. Results showed that in shell and summer total of metals were higher than muscle and winter season and was significant relationships between them (P≤0.05). The maximum concentration of Zn in shell and two season summer and winter observed (44.61± 1.67 and 16.33±1.37 mg/kg dry weigh) and the minimum concentration of Cd (0.1±0.004 and 0.001±0.0001 mg/kg dry weigh) was determinate. There was a significant relationship between water and shrimp for accumulation of heavy metals in two seasons (P≤0.05). Results showed accumulation of Cd was higher than the NHMRC and the INSO standard.