Nowadays, cryopreservation of the human body has attracted more and more attention as a new technology that may achieve "resurrection".
As far as current technology is concerned, cryopreservation is more like a cheque to be cashed in the future , because rewarming is an extremely complex process that cannot restore human body with current technology.With the emergence of new technologies such as nanotechnology and bionic cryopreservation technology, the technical bottleneck of human cryopreservation is expected to be broken in the future.
What’s human cryopreservation?
Cryobiology is a science that studies life phenomena and the preservation of organisms under low temperature conditions (below 0°C or close to 0°C).
In 1949, British biologists C. Polge and A. U. Smith accidentally discovered that sperm could be cryogenically frozen in glycerin solution without dying, which made cryopreservation enter the historical stage as an important research direction of cryobiology. Cryopreservation refers to the use of special methods to cool living organisms (cells, tissues, organs, and even living biological organisms) to very low temperatures (generally -80℃/-196℃) for short/long term preservation.When needed, the organism will be thawed in a special way and returned to the normal temperature to obtain the organism with normal vital signs.Low temperature can inhibit the biochemical activities of organisms, so that they can be stored at low temperatures for a long time.
Meling -86℃ultra-low temperature freezer DW-HL1008SA
-The largest ULT freezer in the world
According to the Arrhenius equation, the effect of temperature on the rate of biochemical reaction is estimated: if a lifetime object can survive for 2 hours at 4℃, it can be preserved for several days at -40℃, months at -80℃, and even centuries at -196℃.At the low temperature of -196℃, organism metabolism basically stops, avoiding biological variation caused by heredity.
With the development of science and technology, more and more peoplehope to be "immortalized" throughcryopreservation technology. People who suffer from diseases that cannot be cured by modern medicine hope that by preserving their bodies at low temperatures (usually in liquid nitrogen at -196°C), they can successfully rewarm and cure their diseases and regain their lives when medicine develops in the future. In 1967, American psychologist J. Bedford became the first person in the world to be cryopreserved. As of August 2017, Alcor Life Extension Foundation and US Cryonics Institute, the two most representative Cryonics companies in the world, have frozen more than 150 customers each.
At present, there has not been a successful case of human body rewarming and reliving after freezing in the world. But with the continuous extension of the average life span of human beings, life in the future may be relatively immortal.