FNPS Society

Main Menu

  • Home
  • Amalgamation
  • Terms of trade
  • Monotonic
  • G-8
  • Financial Affairs

FNPS Society

Header Banner

FNPS Society

  • Home
  • Amalgamation
  • Terms of trade
  • Monotonic
  • G-8
  • Financial Affairs
Monotonic
Home›Monotonic›Direct observation of the reversible liquid-liquid transition in an aqueous solution of trehalose

Direct observation of the reversible liquid-liquid transition in an aqueous solution of trehalose

By Richard Lyons
January 24, 2022
17
0

Importance

Recent studies on liquid water suggest that both liquid waters exist in the supercooled temperature region and their existence is related to the abnormal behavior of liquid water at low temperature such as maximum density at 4°C. However, the experimental study of two liquid waters is difficult due to rapid crystallization. In this study, a reversible liquid-liquid transition in an aqueous solution of trehalose by the pressure change was observed directly. This result strongly suggests that two liquid waters exist in the aqueous solution. This study has implications for broad fields related to liquid water, such as solution chemistry, cryobiology, meteorology and food engineering.

Summary

The water forms two glassy, ​​amorphous waters of low density and high density, which undergo a reversible polyamorphic transition with the change in pressure. The two glassy waters change into different liquids, low-density liquid (LDL) and high-density liquid (HDL), at high temperatures. Both liquid waters are predicted to also undergo a liquid-liquid transition (LLT). However, reversible LLT, especially the LDL-HDL transition, has not been observed directly due to rapid crystallization. Here, I prepared an aqueous solution of vitreous dilute trehalose (mole fraction 0.020) without segregation and measured the isothermal volume change at 0.01 to 1.00 GPa below 160 K. The polyamorphic transition and the glass transition -liquid for high density and low -density solutions were examined and the liquid region where both LDL and HDL existed was determined. The results show that the reversible polyamorphic transition induced by the pressure change above 140 K is the LLT. That is, the transition from LDL to HDL is observed. Moreover, the pressure hysteresis of LLT strongly suggests that LLT has a first-order nature. Direct observation of reversible LLT in aqueous trehalose solution has implications for understanding not only the liquid-liquid critical point hypothesis of pure water, but also the relationship between aqueous solution and water polyamorphism. .

Data availability

All study data is included in the article and/or IS Annex.

  • Copyright © 2022 the author(s). Published by PNAS.

Related posts:

  1. The pandemic diary: from masks to music, these ladies from a refuge in Chennai proceed their resilience
  2. Lithium niobate crystal movie for built-in photonics functions
  3. World Main Producers Evaluation, Dynamics and Forecast 2020-2026
  4. Scientific & Precision Options Thrive As Their First Anniversary Approaches |

Categories

  • Amalgamation
  • Financial Affairs
  • G-8
  • Monotonic
  • Terms of trade
  • TERMS AND CONDITIONS
  • PRIVACY AND POLICY