陈方雪 周明珠 邓祎 熊光权 李冬生 乔宇 廖李 汪兰 吴文锦 李新 石柳 丁安子



摘 要:以新鲜鮰鱼为原料,利用电子束辐照(0、1、3、5 kGy)结合真空包装于4 ℃条件下冷藏,通过测定菌落总数、总挥发性盐基氮(total volatile basic nitrogen,TVB-N)含量、硫代巴比妥酸反应物(thiobarbituric acid reactive substance,TBARs)值、质构、色度、持水性、感官品质和挥发性物质的变化,研究不同辐照剂量对鮰鱼冷藏期间品质的影响。结果表明:经过电子束辐照处理的鮰鱼贮藏期显著延长,未辐照冷藏时间为6 d,1、3、5 kGy辐照组分别为15、25、30 d;在冷藏期间,辐照组菌落总数在冷藏15 d达到6 (lg(CFU/g)),TVB-N含量在冷藏25 d时达到20 mg/100 g,辐照组菌落总数与TVB-N含量的增长速率显著低于未辐照组,且随辐照剂量的增大,增长速率下降,未辐照组的TBARs值明显低于辐照组,辐照加速了脂肪氧化速率,辐照处理对鮰鱼的持水性、质构和色度影响不大。
关键词:电子束辐照;鮰鱼;品质;灭菌
Effect of Electron Beam Irradiation on Quality of Channel Catfish during Cold Storage
CHEN Fangxue1,2, ZHOU Mingzhu1,2, DENG Yi1,2, XIONG Guangquan1,*, LI Dongsheng2,*, QIAO Yu1, LIAO Li1,
WANG Lan1, WU Wenjin1, LI Xin1, SHI Liu1, DING Anzi1
(1.Institute of Agricultural Products Processing and Nuclear Agriculture Technology, Hubei Academy of Agricultural Sciences,
Wuhan 430064, China; 2.School of Food and Biological Engineering, Hubei University of Technology, Wuhan 430068, China)
Abstract: In this study, small pieces of fresh channel catfish flesh treated by electron beam irradiation at different doses (0, 1, 3 and 5 kGy) combined with vacuum packaging were stored at 4 ℃ and evaluated for total viable count (TVC), total volatile base nitrogen (TVB-N) content, thiobarbituric acid reactive substances (TBARs) value, texture, color, water-holding capacity, sensory quality and volatile substances. The results showed that the storage period of electron beam irradiated channel catfish was significantly prolonged compared with the untreated control group (15, 25 and 30 days at doses of 1, 3 and 5 kGy versus 6 days, respectively). On day 15 of storage, the TVC in the irradiated group reached 6 (lg (CFU/g)), and the TVB-N content reached 20 mg/100 g on day 25. The growth rate of TVC and TVB-N content in the irradiated group was significantly lower than in the non-irradiated group, and declined with increasing radiation dose. Moreover, the TBARs value of the non-irradiated group was significantly lower than that of the irradiated group, indicating that the irradiation could accelerate the rate of lipid oxidation. On the other hand, the irradiation treatment had little effect on the water-holding capacity, texture or color of channel catfish.
Keywords: electron beam irradiation; channel catfish; quality; sterilization
DOI:10.7506/rlyj1001-8123-20210401-090
中圖分类号:TS254.4 文献标志码:A 文章编号:1001-8123(2021)06-0057-06
引文格式:
陈方雪, 周明珠, 邓祎, 等. 电子束辐照处理对鮰鱼冷藏期间品质的影响[J]. 肉类研究, 2021, 35(6): 57-62. DOI:10.7506/rlyj1001-8123-20210401-090. http://www.rlyj.net.cn
CHEN Fangxue, ZHOU Mingzhu, DENG Yi, et al. Effect of electron beam irradiation on quality of channel catfish during cold storage[J]. Meat Research, 2021, 35(6): 57-62. DOI:10.7506/rlyj1001-8123-20210401-090. http://www.rlyj.net.cn
鮰鱼即斑点叉尾鮰(Ictalurus punctatus),亦称美洲鲶,是主要淡水鱼养殖品种,具有生长快、抗病力强、肉质鲜美等优点,加上鮰鱼营养物质丰富、风味特殊而深受国内外消费者喜爱[1-2]。鮰鱼在我国养殖广泛,主要以鮰鱼片的方式销售到国外,但贮藏过程中由于外界环境和自身体内物质发生变化,特别是水分、微生物活动等因素导致其极易腐败变质[3]。
电子束辐照是绿色高新非热加工技术,原理是利用电子加速器产生的射线,通过高……