在冷却和再加热浓缩蔗糖溶液时形成的冰晶

IF 2.1 3区 生物学 Q2 BIOLOGY
Norihito Kimizuka
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引用次数: 0

摘要

采用差示扫描量热法和光学显微镜研究了蔗糖溶液冷却和再加热过程中冰晶形成的浓度依赖性(51-72 wt%),冷却和加热速率为±1.0 -±3.0°C/min。在冷却过程中,在浓度高达60 wt%的溶液中形成冰晶,但在浓度≥61 wt%的溶液中没有发现冰晶。相比之下,在溶液浓度为59-62 wt%时,再升温过程中的冰晶是不规则的,并伴有脱硝(Td)和/或再结晶(Tr)。然而,在≥64 wt%时,只发生反硝化作用,而在72 wt%或更高时则不形成冰晶。这些结果表明,当浓度≥60 wt%时,二元体系状态图上的Td曲线存在,当浓度≥64 wt%时,只有在以3.0℃/min的速度再升温时,才能通过−40 ~−30℃的反硝化作用形成冰晶。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ice-crystal formation during cooling and rewarming of concentrated sucrose solutions
The concentration dependence of ice-crystal formation during cooling and rewarming of sucrose solutions (51–72 wt%) was studied by differential scanning calorimetry and optical microscopy at cooling and heating rates of ±1.0–±3.0 °C/min. During cooling, ice crystals formed in solutions with concentrations of up to 60 wt%, but were not found in solutions with concentrations of ≥61 wt%. In contrast, ice-crystal at solution concentrations of 59–62 wt% during rewarming was irregular and accompanied by devitrification (Td) and/or recrystallization (Tr). However, at ≥64 wt%, only devitrification occurred, and no ice crystals were formed at 72 wt% or higher. These results suggest that the Td curve on the binary system state diagram exists at concentrations of ≥60 wt%, with concentrations of ≥64 wt% resulting in ice-crystal formation only via devitrification at −40 to −30 °C during rewarming at 3.0 °C/min.
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来源期刊
Cryobiology
Cryobiology 生物-生理学
CiteScore
5.40
自引率
7.40%
发文量
71
审稿时长
56 days
期刊介绍: Cryobiology: International Journal of Low Temperature Biology and Medicine publishes research articles on all aspects of low temperature biology and medicine. Research Areas include: • Cryoprotective additives and their pharmacological actions • Cryosurgery • Freeze-drying • Freezing • Frost hardiness in plants • Hibernation • Hypothermia • Medical applications of reduced temperature • Perfusion of organs • All pertinent methodologies Cryobiology is the official journal of the Society for Cryobiology.
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