作　　者： ; ;

机构地区： 华南理工大学轻工与食品学院

出　　处： 《食品工业科技》 2012年第23期101-105,共5页

摘　　要： 以强制对流浸渍冻结过程中的草鱼块变化为研究对象,研究了在-20、-30℃不同流速条件浸渍冻结对草鱼块品质(理化特性和质构特性)以及载冷剂各组分吸收量的影响。实验结果表明:-20℃及-30℃条件下载冷剂的流速分别为14.9L/min和9.9L/min时,各组分吸收量、汁液流失率和Ca2+-ATPase活性降低率都较小,硬度和咀嚼性没有显著性变化,草鱼块品质保持的最好。同时,增加流速在一定程度上可以减少对载冷剂溶质的吸收:在-20℃流速0～5.88L/min以及-30℃流速0～4.02L/min的范围内,流速增加促进传质,吸收量增加,而当流速继续增大,传热加快,吸收量会有减少的趋势。 The quality changes （physicochemical characteristics and texture properties）and refrigerant impregnation into grass carp block during immersion chilling and freezing （ICF）with forced convection at -20℃, -30℃ under different velocity of refrigerant were investigated.Results indicated that,when velocity of refrigerant in ICF reached 14.gL/min at -20℃and 9.gL/min at -30℃, the decrease of refrigerant impregnation, drop loss rate and Ca2＋- ATPase activity were not remarkable, and no significant change was observed in hardness and chewiness, respectively, and maintained the optimum quality of grass carp cubes.To some extent, the increased velocity reduced the impregnation of solute into the grass carp cubes.When the velocity was 0-5.88L/min at -20℃ and 0-4.02 L/min at -30℃,the increased velocity could promote the mass transfer and impregnation of solute.But when the velocity continued to increase, there was a decreasing trend in the impregnation of solute with accelerating the heat transfer.

关 键 词： 浸渍冻结 流速 草鱼块 吸收量 品质

领　　域： [轻工技术与工程] [轻工技术与工程]