Effect of immersion freezing on water migration in Huangguan pears

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-05-22 DOI:10.1016/j.ijrefrig.2024.05.023

Xuehui Cao, Xiaomin Zhang, Ya Wang, Rui Nian, Kaiyan You, Danshi Zhu

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Abstract

The effect of immersion freezing on water distribution and calcium ion migration in pears was studied. The samples were frozen at -20 °C and -40 °C. Results showed that the -40 °C combined immersion freezing (-40IF-T) was better in inhibiting sample browning and sensory quality, compared with other groups. Water activity and freezable water content were closer to that of the unfrozen sample. Compared with -20IF, the freezing time of -40IF-T was reduced by 74.90 %. Both the drip loss and calcium ion content showed that -40IF-T was better than other groups. Low-field nuclear magnetic resonance results showed that -40IF-T reduced water migration during freezing, indicating a more uniform distribution of water in -40IF-T tissues. The results of relative conductivity showed that -40IF-T could effectively reduce the damage of cell membrane caused by freezing. In conclusion, low temperature and cryoprotective fluid can be used as effective methods to maintain sample quality.

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浸泡冷冻对黄冠梨水分迁移的影响

研究了浸泡冷冻对梨中水分分布和钙离子迁移的影响。样品分别在 -20 °C 和 -40 °C 下冷冻。结果表明，与其他组相比，-40 °C联合浸泡冷冻（-40IF-T）在抑制样品褐变和感官质量方面效果更好。水活性和可冷冻水含量更接近未冷冻样品。与 -20IF 相比，-40IF-T 的冷冻时间缩短了 74.90%。滴水损失和钙离子含量均表明，-40IF-T 组的效果优于其他组。低场核磁共振结果表明，-40IF-T 在冷冻过程中减少了水分迁移，表明水分在 -40IF-T 组织中分布更均匀。相对电导率结果表明，-40IF-T 能有效减少冷冻对细胞膜的损伤。总之，低温和低温保护液是保持样本质量的有效方法。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.