ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
ABSTRACT
Ultrasound and water soluble soybean polysaccharide (SSPS) were applied during the freezing of grass carp surimi. Ultrasound-assisted immersion freezing (UF) process was observed from 0 °C to −15 °C. Based on characteristic freezing time, tempering-stage freezing rate and the quality change of surimi after a 14-day storage period, the optimal sonication was performed 5 times at 300 W, for 10 s, with 40 s intervals. The cryoprotective effects of SSPS content on surimi myofibillar protein were subsequently investigated during 28-day frozen storage at −18 °C. The Ca2+-ATPase activity, total sulphydryl content, active sulphydryl content, salt extractable protein content, whiteness and water-holding capacity of frozen surimi were determined after adding SSPS (0%, 1%, 3% and 5%). The results showed that synergism of SSPS and UF occurred. Consequently 3% SSPS was best for mitigating the protein denaturation during processing.
4. Conclusion
The use of ultrasound in the immersion freezing process of grass carp surimi was evaluated. Results showed that ultrasound could significantly increase the freezing rates of surimi in the power range (300–540 W). Based on characteristic freezing time, tempering-stage freezing rate and the quality change of surimi after a 14-day storage period, the optimal ultrasound treatment was found to be 300 W, for 10 s, rest for 40 s and repeat 5 times. Subsequently the storage of frozen surimi indicated that adding SSPS could alleviate the decline in Ca2+- ATPase activity, total sulphydryl content, active sulphydryl content, salt extractable protein content and water-holding capacity of grass carp surimi. Using the above indicators, 3% SSPS effectively mitigated the protein denaturation of grass carp surimi during storage at −18 °C. The research suggests that as a novel cryoprotectant, SSPS can significantly enhance the quality of surimi products while avoiding an excessively sweet taste and high calorie value. It will be a promising advance in technology to apply ultrasonic-assisted freezing in conjunction with SSPS in frozen surimi products.