Search results
Results From The WOW.Com Content Network
Cryopreservation is a hallmark method for fungi that do not sporulate (otherwise other preservation methods for spores can be used at lower costs and ease), sporulate but have delicate spores (large or freeze-dry sensitive), are pathogenic (dangerous to keep metabolically active fungus) or are to be used for genetic stocks (ideally to have an ...
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.
At least six major areas of cryobiology can be identified: 1) study of cold-adaptation of microorganisms, plants (cold hardiness), and animals, both invertebrates and vertebrates (including hibernation), 2) cryopreservation of cells, tissues, gametes, and embryos of animal and human origin for (medical) purposes of long-term storage by cooling to temperatures below the freezing point of water.
The history of plant cryopreservation started in 1965 when Hirai was studying the biology activities that happened when biological samples were frozen. [1] Three years later, there was the first successful attempt cryopreserving callus cells. [1]
Birdseye's original cryogenic freezing approach using immersion in liquid nitrogen is still used. [9] Due to its cost, however, use is limited to fish fillets, seafood, fruits, and berries. It is also possible to freeze food by immersion in the warmer (at −70 °C (−94 °F)), but cheaper, liquid carbon dioxide , which can be produced by ...
Cryonics (from Greek: κρύος kryos, meaning "cold") is the low-temperature freezing (usually at −196 °C or −320.8 °F or 77.1 K) and storage of human remains in the hope that resurrection may be possible in the future. [1] [2] Cryonics is regarded with skepticism by the mainstream scientific community.
Cryonics, the low-temperature preservation of people who cannot be sustained by contemporary medicine; Cryoprecipitate, a blood-derived protein product used to treat some bleeding disorders; Cryotherapy, medical treatment using cold Cryoablation, tissue removal using cold; Cryosurgery, surgery using cold
American inventor Clarence Birdseye developed the "quick-freezing" process of food preservation in the 20th century using a cryogenic process. [7] In practice, a mechanical freezing process is usually used due to cost instead. There has been continuous optimization of the freezing rate in mechanical freezing to minimize ice crystal size. [3]