High-fidelity long-term storage of biological material
The present invention relates to the long-term preservation of biological material. More specifically, it concerns a preservation container comprising: a biological container for containing biological material, a first shield configured for absorbing gamma-rays, a second shield configured for absorbing ambient neutrons, said second shield surrounding the biological container, the preservation container being of low-radioactivity background materials, and a method for preserving a biological material, comprising: a) providing a biological material in a confinement container, b) providing the preservation container of the invention, c) placing the confinement container containing the biological material into said preservation container, d) storing said preservation container containing the biological material in a room located under a material attenuating cosmic rays and induced particles, said material having a thickness equivalent to 1 m to 7000 m of water, for attenuating cosmic rays.
1. A preservation container comprising:
a biological container for containing biological material;
a first shield configured for absorbing gamma-rays, wherein the first shield has a gamma-ray attenuation factor equivalent to 10 cm to 15 cm of lead; and
a second shield configured for absorbing ambient neutrons, said second shield surrounding the biological container, wherein the second shield has a neutron attenuation factor equivalent to 30 to 100 cm of water;
the preservation container being of low-radioactivity background materials, wherein the materials have a radioactivity of 10 Bq/kg or less, and
wherein a radon-free fluid, being a fluid having radioactivity of less than 0.1 Bq/m 3 due to radon, stands and/or circulates around and/or within the biological container, wherein the radon-free fluid comprises radon-free air, radon-free nitrogen, or radon-free argon.
2. The preservation container of claim 1 , wherein
the first shield is located between the biological container and the second shield, or
the second shield surrounds the biological container and is located within the first shield.
3. The preservation container of claim 1 , wherein it further comprises a cryogenic container, said cryogenic container containing a cold source and defining a chamber for containing the biological container.
4. The preservation container of claim 3 , wherein:
the first shield surrounds the biological container and is located within the cryogenic container, or
the first shield is located between the cryogenic container and the second shield, or
the second shield is located within the first shield.
5. The preservation container of claim 4 , wherein the first shield surrounds the biological container and is located within the cryogenic container, and the second shield surrounds the cryogenic container.
6. The preservation container of claim 3 , wherein the cold source is a heat engine, or a cryogenic fluid comprising liquid nitrogen or argon.
7. A method for preserving a biological material, comprising:
a) providing a biological material in a confinement container,
b) providing the preservation container of claim 1 ,
c) placing the confinement container containing the biological material into the biological container of said preservation container,
d) storing said preservation container containing the biological material in a room located under a material attenuating cosmic rays and induced particles, said material having a thickness equivalent to 1 m to 7000 m of water, for attenuating cosmic rays.
8. The method of claim 7 , wherein the material attenuating cosmic rays is earth, rock, water and/or concrete.
9. The method of claim 8 , wherein the radon-free fluid is a fluid having radioactivity of less than 0.1 Bq/m 3 due to radon.
10. The method of claim 7 , wherein
the radon-free fluid is a fluid having radioactivity of less than 0.1 Bq/m 3 due to radon, and/or
the room contains an atmosphere of less than 1 Bq/m 3 .
11. The method of claim 10 , wherein
the atmosphere of less than 0.1 Bq/m 3 is a radon-free atmosphere.
12. The method of claim 7 , wherein the biological material is a data storage material.
13. The method of claim 12 , wherein the data storage material comprises DNA, RNA, a peptide, a protein, a virus, or a bacterium or any combination thereof.
14. The method of claim 7 , wherein the preservation container further comprises a cryogenic container comprising a cold source and a chamber containing the biological container, said biological container being cooled by the cold source,
and wherein step c) comprises cooling the biological material by placing the confinement container in the biological container.
15. The method of claim 14 , wherein the biological container is frozen by placing it within or in freezing proximity to the cold source.
16. The method of claim 14 , wherein the biological material is:
a peptide, a protein, DNA, or RNA;
a pluripotent stem cell, an induced pluripotent stem cell, or a gamete;
a seed, a spore, or a pollen;
a larvae, an insect, a bacterium, a virus; or
a tissue, an organ, body parts or a whole animal body.
17. The preservation container of claim 1 wherein the second shield comprises polyethylene containing at least 14 wt % of hydrogen atom, hydrogen containing polyolefins, paraffin, or wood, or any combination thereof.
18. The preservation container of claim 17 , further comprising a cryogenic container, said cryogenic container containing a cold source and defining a chamber for containing the biological container, wherein the cold source is a heat engine, or a cryogenic fluid comprising liquid nitrogen or argon.
19. System for preserving a biological material comprising the preservation container containing the biological material of claim 1 and further comprising a room located under a material attenuating cosmic rays and induced particles, said material having a thickness equivalent to 1 m to 7000 m of water, for attenuating cosmic rays, the preservation container containing the biological material is located within the room.