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首页> 外文期刊>International Journal of Refrigeration >Direct contact ultrasound assisted freezing of mushroom (Agaricus bisporus): Growth and size distribution of ice crystals
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Direct contact ultrasound assisted freezing of mushroom (Agaricus bisporus): Growth and size distribution of ice crystals

机译：直接接触超声辅助冷冻蘑菇（双孢蘑菇）：冰晶的生长和大小分布

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摘要

To reduce the size of ice crystals in mushroom (Agaricus bisporus) contact ultrasound (300 W, 20 kHz) was applied during freezing and frozen storage. Stereomicroscopy was used to observe the ice crystal morphology, and DSC and NMR spectroscopy were performed to evaluate the water states in the samples. Results indicated that ultrasound irradiation initiated the nucleation of ice and reduced the mean size of ice crystals during freezing and frozen storage, and therefore improved the frozen product quality compared to the control samples. Most of the ice crystals in the ultrasound assisted frozen (UAF) samples were in the size range of 0-80 microns while that for the control samples were in the size range of 50-180 microns. SEM photos also proved that due to the application of ultrasound, the sizes of the ice crystals was reduced. This micro-scale information on the documentation of ice crystals will assist in understanding the ice crystal growth phenomena in an ultrasound assisted freezing process. (C) 2015 Elsevier Ltd and IIR. All rights reserved.
机译：为了减少蘑菇（双孢蘑菇）中冰晶的大小，在冷冻和冷冻储存期间应用了接触式超声波（300 W，20 kHz）。用立体显微镜观察冰晶形态，并用DSC和NMR光谱法评价样品中的水态。结果表明，超声辐照引发了冰的成核作用，并降低了冷冻和冷冻储存过程中冰晶的平均尺寸，因此与对照样品相比，提高了冷冻产品的质量。超声辅助冷冻（UAF）样品中的大多数冰晶尺寸在0-80微米范围内，而对照样品的冰晶尺寸在50-180微米范围内。 SEM照片还证明，由于超声的应用，冰晶的尺寸减小了。有关冰晶记录的微观信息将有助于了解超声辅助冷冻过程中的冰晶生长现象。 （C）2015 Elsevier Ltd和IIR。版权所有。

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