Physicochemical, microbial and sensory characteristics of fish fingers made from treated silver carp fillet by salt and sugar solutions during refrigerated storage

Document Type : Research Article

Authors

• Mehri Zolfaghari ¹
• Eshagh Zakipour Rahimabadi ²
• Mahin Rigi ³
• Majid Alipour ⁴

¹ Faculty of Natural Resources, University of Zabol, Zabol.

² Faculty of Natural Resources, University of Guilan, Sawmeh Sara.

³ Hamoon International Wetland Research Institute, University of Zabol, Zabol, Iran.

⁴ Faculty of Veterinary Medicine, University of Zabol, Zabol.

https://doi.org/10.22067/ifstrj.v16i2.81835

Abstract

Introduction: Seafood is among the very perishable foodstuffs. For this reason, a lot of researches have focused on improving the quality of fish and increasing the shelf-life of fishery products, including the use of edible films, modified atmosphere, freezing and control of temperature. Storage in the refrigerator is one of the methods used in fish supply centers to keep quality and extend the product shelf-life. The storage of fish and seafood in the refrigerator decreases the enzymatic and chemical activity and activity of microorganisms. However, undesirable changes occur during refrigerator storage, which leads to a decrease in quality. Therefore, it is necessary to maintain the product quality by combining protective factors. The aim of the present study was to evaluate the preservation effects of salt/sugar solutions treatment on quality of fish fingers made from silver carp (Hypophthalmichthys molitrix) fillets during refrigerated storage (4ºC).
 
Materials and methods: The prepared fillets (about 100 g in weight) were soaked in cold 10% salt/sugar solutions for 30 min, allowed to drain for 15 min in refrigerator and after bone separation were minced. Fish fingers were prepared after adding the ingredients and mixing, and then packaged and stored in refrigerator for 15 days. The treatments of study were as: fish fingers without any treatment (control sample), samples made from treated fillet with salt/sugar solution(50 / 50) (T2), samples made from treated fillet with salt/sugar solution (75 / 25) (T3) and fish fingers made from treated fillet with salt solution (100 %) (T4). Physicochemical, microbial (TVC and PTC) and sensory characteristics were measured at days 0, 3, 6, 9, 12 and 15.
 
Results and discussion: PV, TBA and TVB-N values were increased significantly in all treatments (p<0.05). Lowest TVC count was obtained in treatment 2 at day 15 (5.8 log CFU/g). According to the obtained results, treatment 2 was the best treatment in sensory characteristics. Osmotic treatment increased the shelf-life of fillets and their products, due to the effect of preventing these solutions against the growth of spoilage bacteria, which ultimately resulted in the reduction of corrosive products such as TBA and TVB- N. The results of this study showed that osmotic solutions have the potential to replace the thermal and chemical treatments to produce a quality and healthy product with an apparent consumer sentiment.

Keywords

• Fish finger
• silver carp
• Quality characteristics
• Salt
• Sugar

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