Three-dimensional measurement of ice crystals in frozen dilute solution |
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| Authors: | Shigeaki Ueno Gab-Soo Do Yasuyuki Sagara Ken-ichi Kudoh Toshiro Higuchi |
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| Affiliation: | a Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan;b Department of Precision Machinery Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8658, Japan |
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| Abstract: | A Micro-Slicer Image Processing System (MSIPS) has been applied to observe the ice crystal structures formed in frozen dilute solutions. Several characteristic parameters were also proposed to investigate the three-dimensional (3-D) morphology and distribution of ice crystals, based on their reconstructed images obtained by multi-slicing a frozen sample with the thickness of 5 μm. The values of characteristic parameters were determined for the sample images with the dimension of 530×700×1000 μm. The 3-D morphology of ice crystals was found to be a bundle of continuous or dendrite columns at any freezing condition. The equivalent diameter of ice crystals were in the range of 73–169 μm, and decreased exponentially with increasing freezing rate at the copper cooling plate temperature of −20 to −80 °C. At the Tcp −40 °C, the volumes of ice crystals were in the range of 4.6×104 μm3 to 3.3×107 μm3, and 36 ice columns were counted in the 3-D image. |
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| Keywords: | Solution Freezing Ice Crystal Formation Optical systemSolution Congé lation Glace Cristal Formation Optique |
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