Visualization of Freezing Process in situ upon Cooling and Warming of Aqueous Solutions
10.1038/srep07414
Crossref journal-article
Springer Science and Business Media LLC
Scientific Reports (297)
Abstract

AbstractThe freezing of aqueous solutions and reciprocal distribution of ice and a freeze-concentrated solution (FCS) are poorly understood in spite of their importance in fields ranging from biotechnology and life sciences to geophysics and climate change. Using an optical cryo-miscroscope and differential scanning calorimetry, we demonstrate that upon cooling of citric acid and sucrose solutions a fast freezing process results in a continuous ice framework (IF) and two freeze-concentrated solution regions of different concentrations, FCS1 and FCS2. The FCS1 is maximally freeze-concentrated and interweaves with IF. The less concentrated FCS2 envelops the entire IF/FCS1. We find that upon further cooling, the FCS1 transforms to glass, whereas the slow freezing of FCS2 continues until it is terminated by a FCS2-glass transition. We observe the resumed slow freezing of FCS2 upon subsequent warming. The net thermal effect of the resumed freezing and a reverse glass-FCS1 transition produces the Ttr2-transition which before has only been observed upon warming of frozen hydrocarbon solutions and which nature has remained misunderstood for decades.

Bibliography

Bogdan, A., Molina, M. J., Tenhu, H., Bertel, E., Bogdan, N., & Loerting, T. (2014). Visualization of Freezing Process in situ upon Cooling and Warming of Aqueous Solutions. Scientific Reports, 4(1).

Authors 6
  1. Anatoli Bogdan (first)
  2. Mario J. Molina (additional)
  3. Heikki Tenhu (additional)
  4. Erminald Bertel (additional)
  5. Natalia Bogdan (additional)
  6. Thomas Loerting (additional)
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Dates
Type When
Created 10 years, 8 months ago (Dec. 10, 2014, 5:14 a.m.)
Deposited 2 years, 7 months ago (Jan. 6, 2023, 12:48 a.m.)
Indexed 1 month, 2 weeks ago (July 16, 2025, 8:17 a.m.)
Issued 10 years, 8 months ago (Dec. 10, 2014)
Published 10 years, 8 months ago (Dec. 10, 2014)
Published Online 10 years, 8 months ago (Dec. 10, 2014)
Funders 0

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@article{Bogdan_2014, title={Visualization of Freezing Process in situ upon Cooling and Warming of Aqueous Solutions}, volume={4}, ISSN={2045-2322}, url={http://dx.doi.org/10.1038/srep07414}, DOI={10.1038/srep07414}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Bogdan, Anatoli and Molina, Mario J. and Tenhu, Heikki and Bertel, Erminald and Bogdan, Natalia and Loerting, Thomas}, year={2014}, month=dec }