Search results
Results from the WOW.Com Content Network
Vapor pressure of liquid. Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed. loge of Glycerol vapor pressure. Uses formula: with coefficients A=-2.125867E+01, B=-1.672626E+04, C=1.655099E+02, and D=1.100480E-05 obtained from CHERIC 5.
The minimum freezing point temperature is about −38 °C (−36 °F) corresponding to 70% glycerol in water. Glycerol was historically used as an anti-freeze for automotive applications before being replaced by ethylene glycol, which has a lower freezing point.
Solvent. Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source. Aniline. 184.3.
At colder temperatures (below 0 °C), glycogen production is inhibited, and the breakdown of glycogen into glycerol is enhanced, resulting in the glycerol levels in freeze-avoidant insects reaching levels five times higher than those in freeze tolerant insects [19] which do not need to cope with extended periods of cold temperatures.
Cryoprotectant. A cryoprotectant is a substance used to protect biological tissue from freezing damage (i.e. that due to ice formation). Arctic and Antarctic insects, fish and amphibians create cryoprotectants (antifreeze compounds and antifreeze proteins) in their bodies to minimize freezing damage during cold winter periods.
Cooling bath. A typical experimental setup for an aldol reaction. Both flasks are submerged in a dry ice/acetone cooling bath (−78 °C) the temperature of which is being monitored by a thermocouple (the wire on the left). A cooling bath or ice bath, in laboratory chemistry practice, is a liquid mixture which is used to maintain low ...
Water in and between cells in the plant freezes and expands, causing tissue damage. Cold hardening is a process in which a plant undergoes physiological changes to avoid, or mitigate cellular injuries caused by sub-zero temperatures. [1] Non-acclimatized individuals can survive −5 °C, while an acclimatized individual in the same species can ...
Freezing tolerance. Freezing tolerance describes the ability of plants to withstand subzero temperatures through the formation of ice crystals in the xylem and intercellular space, or apoplast, of their cells. Freezing tolerance is enhanced as a gradual adaptation to low temperature through a process known as cold acclimation, which initiates ...