'Accurate' at -196 degrees C: Humanity is taking a step to immortality?

Suspension of life by freezing and waking up after tens of years or even hundreds of years is what many people believe and leave the fortune to perform.

In this, there is only one problem, but the biggest one: when the water hardens to stone, it destroys the cells.

In the United States, thousands of people are expected to be frozen after death. There are up to 5 potential market businesses.

Currently, nearly 70 remains have been released into tanks filled with liquid nitrogen, and hundreds of survivors have subscribed to the service.

They all hope to return to life after 20, 50 or 100 years, when scientists have found a way to counteract the disease that has claimed their lives, or have a way to fight old age. .

Freezing and preserving process costs over 150,000 USD.

But to have hope for resurrection, you must be rich. Freezing and preserving process costs over 150,000 USD.

People with less money may choose a different, more economical solution called neuro . It is only the head of the dead who is kept in a frozen environment, mainly to hold the brain, the body determines the nature of the person who wants to revive.

Hugh Hixon, technician of Alcor Cryogenics, one of the five famous frozen companies, said:

The service participant's brain can be paired with a body of his own asexual that has removed the brain, or with another body that has improved in the way of a Rambo hero or the brain's information. be transferred to a robot via computer .

In order to realize these theories, the body and the brain must first pass a long time without being damaged much. It is true that cold has the ability to preserve.

It slows down and terminates the decomposition process at -196 ^° C (temperature of liquid nitrogen). But if the rottenness does not happen, the frozen corpses can still wake up but in a situation of holes .

The culprit here is the freezing. As soon as the boundary of 0 ^o C is exceeded, water (up to 70% of our body) begins to turn into ice. It increased by 9% in volume and crystallized. These crystals are especially harmful to the body.

If the freezing process takes place slowly, those stones will form outside the cell, while isolating the water molecules of the fluid in the body. As a result, all the ingredients in that liquid will be dissolved in the amount of liquid at a time of shrinking.

The outer solution is thicker than the solution inside the cell and forms a force to absorb water from inside the cell. This phenomenon will break the cell.

In contrast to the above process, if the cooling process accelerates, the cells do not have time to dehydrate. The ice will form inside the cells and crystals that tear the membranes.

Obviously, there is an ideal cooling process, without damaging the cells.

But applying it synchronously with all the cells of a 70kg corpse is still a "impossible task" (because each cell type requires a different storage condition, while the human body There are hundreds of thousands of such cells.

Some cold-blooded animals, like forest frogs, are well adapted to extreme temperatures. In winter, this amphibian is able to survive after two weeks with 65% of the body's water in the form of ice. Their secret is to never let crystals form inside cells.

To accomplish that, the frog body has molecules containing glucose, which acts as an anti-cold tool to penetrate into the cell and prevent freezing.

As a result, free water molecules are linked, so the freezing process takes place more slowly. And with low temperatures, up to -8 ^° C (below this temperature the frog will die), the inside of the cell still has liquid.

Inspired by the frog's ability, Alcor's technical experts tried to give their customers glycerol. However, for experts in the field of embalming, this is not the optimal solution.

Human body frozen in tanks at the Fund prolonged Alcor life in Arizona, USA.(Photo: Reuters).

They also took into account the solution of using antifreeze. The goal is to store cells at -196 ^° C, to preserve body parts, for transplantation.

Currently, the organs are stored in a medium above 0 ^° C. With this temperature, a heart can hold 4-6 hours, just enough for doctors to do the necessary tests before transplanting.

Transmission liquid freezing

Thanks to various anti-freezing agents, today's embalming experts are able to keep individual cells below 0 ° C without being damaged, such as red blood cells, sperm, liver cells, heart , bone or even a small cell group such as undeveloped embryos (4 to 8 cells), heart valves and even some simple tissues like skin or cornea.

However, intact parts like the heart, liver or kidney are kept at a temperature of -196 ^° C, and then recovered, they are unsuccessful.

The reason is because each organ is made up of millions of very different cells , each with special requirements (such as pancreatic cells that produce insulin, against rapid freezing, while it is another cell, secreting glucagon, does not tolerate any fast anti-freezing agent .)

Assuming scientists can determine the average conditions suitable for all cells, it is difficult to apply simultaneously with the whole body.

Cells located on the surface freeze faster than cells in the center, cells located next to the arteries (people transmit anti-freezing agents through arteries) will be provided better than distant cells.

Glass replaces ice

Unable to, technical experts change direction to a new method: vitrification . With technology no longer ice between cells, but an amorphous like glass.

Thus, when the temperature is rapidly reduced to -130 ^° C, the liquid exists in a messy way and does not freeze.

As a result, the cell retains its original shape, and "glass" blocks the space between the cells without altering the structure of the body parts.

This is considered to be the ideal technique to keep a body part or body. However, it is still just a theory because scientists have repeatedly tested on a body part, but have not yet succeeded.

The chiller of psychologist Professor James Bedford since January 1967 is still preserved.

If cells don't die from anti-freezing poisoning (often poisoning in the most concentrated areas), they also die from being torn by crystals that form at reheating, if the warming process is not strong enough. .

However, Geogory M. Fahy, an expert in organ vitrification, is still very optimistic. In the laboratory, he continued to test new, less toxic, anti-freezing compounds. And Alcor's experts didn't give up either.

In their book, they explain that in the near future, people will overpower the micro-technologies in the blood circulation system.

Thanks to its ability to operate independently, these machines will be programmed to repair one molecule after another, preventing any damage caused by freezing, aging, disease and death. .

Of course, so far, it's all about science fiction.