氢键对低温保护剂溶液状态图的影响。

IF 1 4区生物学 Q3 BIOLOGY

Cryo letters Pub Date : 2024-07-01 DOI:10.54680/fr24410110712

O. I. Osetsky

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引用次数: 0

摘要

材料和方法采用体积扫描张力测量法研究了温度范围为 +25 至 -150 ℃ 的甘油和二甲基亚砜水溶液的相态。结果建立了绘制分子间相互作用微弱的二元溶液状态图的原理。研究表明，在这种溶液中会形成以冰微晶和低温保护剂为基础的簇。根据所得结果，绘制了甘油和二甲基亚砜水溶液的状态图。这些图表包括团簇相存在的区域，与描述共晶结晶的图表有本质区别。结论分析了低温保护剂溶液在冷却过程中出现的纳米结构，证明了这些结构与经典固相共晶之间的差异。Doi.org/10.54680/fr24410110712.

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Influence of hydrogen bonds on state diagrams of cryoprotectant solutions.

BACKGROUND Transformation of state diagrams of cryoprotectant solutions under the influence of weak intramolecular interactions was considered. MATERIALS AND METHODS Phase states of aqueous glycerol and DMSO solutions within temperature range +25 to -150 degree С were studied using method of volumetric scanning tensodilatometry. Temperatures below which hydrogen bonds significantly affect crystallization-melting kinetics of such solutions were determined. RESULTS Principles for plotting of state diagram for binary solutions with weak intermolecular interaction of the components were set up. The study demonstrates that in such solutions formation of clusters based on ice microcrystals and cryoprotectant occurs. Based on the obtained results, state diagrams for glycerol and DMSO aqueous solutions were plotted. These diagrams include area of cluster phase existence and differ fundamentally from those describing eutectic crystallization. CONCLUSION Nanostructures occurring in cryoprotectant solutions during their cooling were analyzed. Difference between these structures and classical solid phase eutectics were demonstrated. Doi.org/10.54680/fr24410110712.

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来源期刊

Cryo letters 生物-生理学

CiteScore

1.80

自引率

10.00%

发文量

审稿时长

1 months

期刊介绍： A bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.