Glass transition and heat capacity behaviors of plant vitrification solutions

Heat capacity at the glass transition

A fundamental problem of glass transition is to provide a quantitative and microscopic explanation of the heat-capacity jump at the glass transition temperature Tg . Similar problems are also common to other disordered systems, including spin glasses. We propose that the jump of heat capacity at Tg takes place as a result of the change of the liquid’s elastic, vibrational, and thermal propertie...

Vitrification of immature bovine oocytes using glass micropipettes under normal or super-cooled LN Vitrification and thawing: Two vitrification solutions

Aim: To evaluate the developmental competence of post-thaw vitrified bovine cumulus-oocyte complexes (COCs) in vitro. Materials and Methods: A total of 129 COCs were cryopreserved using vitrification solution comprising of 15% ethylene glycol (EG) + 15% dimethyl sulfoxide (DMSO) + 0.6 M sucrose in medium TCM-199 with 10% FBS. Immediately, within a minute they are plunged into liquid nitrogen us...

Heat capacity and glass transition in P2O5-H2O solutions: support for Mishima's conjecture on solvent water at low temperature.

The P(2)O(5)-water system has the widest range of continuously glass-forming compositions known for any glassformer + water binary system. Despite the great range of structures explored by the glasses and liquids in this system, the glass transition temperature (T(g)) itself varies in a simple monotonic fashion. However the values of T(g) reported in the literature show wide disagreement, linke...

Nonmonotonic temperature dependence of heat capacity through the glass transition within a kinetic model.

The heat capacity of a supercooled liquid subjected to a temperature cycle through its glass transition is studied within a kinetic model. In this model, the beta process is assumed to be thermally activated and described by a two-level system. The alpha process is described as a beta relaxation mediated cooperative transition in a double well. The overshoot of the heat capacity during the heat...

The Use of Matlab in the Study of the Glass Transition and Vitrification in Polymers