enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Freezing - Wikipedia

    en.wikipedia.org/wiki/Freezing

    Freezing is a common method of food preservation that slows both food decay and the growth of micro-organisms. Besides the effect of lower temperatures on reaction rates, freezing makes water less available for bacteria growth. Freezing is a widely used method of food preservation. Freezing generally preserves flavours, smell and nutritional ...

  3. Freeze drying - Wikipedia

    en.wikipedia.org/wiki/Freeze_drying

    To produce larger crystals, the product should be frozen slowly or can be cycled up and down in temperature in a process called annealing. The freezing phase is the most critical in the whole freeze-drying process, as the freezing method can impact the speed of reconstitution, duration of freeze-drying cycle, product stability, and appropriate ...

  4. Flash freezing - Wikipedia

    en.wikipedia.org/wiki/Flash_freezing

    In physics and chemistry, flash freezing is the process whereby objects are rapidly frozen. [1] This is done by subjecting them to cryogenic temperatures , or it can be done through direct contact with liquid nitrogen at −196 °C (−320.8 °F).

  5. Fractional freezing - Wikipedia

    en.wikipedia.org/wiki/Fractional_freezing

    Fractional freezing is a process used in process engineering and chemistry to separate substances with different melting points. It can be done by partial melting of a solid, for example in zone refining of silicon or metals, or by partial crystallization of a liquid, as in freeze distillation, also called normal freezing or progressive freezing.

  6. Nucleation - Wikipedia

    en.wikipedia.org/wiki/Nucleation

    The freezing of small water droplets to ice is an important process, particularly in the formation and dynamics of clouds. [1] Water (at atmospheric pressure) does not freeze at 0 °C, but rather at temperatures that tend to decrease as the volume of the water decreases and as the concentration of dissolved chemicals in the water increases. [1]

  7. Dry ice - Wikipedia

    en.wikipedia.org/wiki/Dry_ice

    In laboratories, a slurry of dry ice in an organic solvent is a useful freezing mixture for cold chemical reactions and for condensing solvents in rotary evaporators. [38] Dry ice and acetone forms a cold bath of −78 °C (−108 °F; 195 K), which can be used for instance to prevent thermal runaway in a Swern oxidation .

  8. What is graupel? How it is different from sleet or hail? - AOL

    www.aol.com/weather/difference-between-freezing...

    Sleet and freezing rain occur by a similar process, but are different forms of precipitation. Both are most common in the winter. Sleet occurs when snowflakes melt into a raindrop in a wedge of ...

  9. Frozen food - Wikipedia

    en.wikipedia.org/wiki/Frozen_food

    Tunnel freezing is a variant of air-blast freezing where food is put onto trolley racks and sent into a tunnel where cold air is continuously circulated. Fluidized bed freezing is a variant of air-blast freezing where pelletized food is blown by fast-moving cold air from below, forming a fluidized bed. The small size of the food combined with ...