Composition for antifreezing

Patent metadata

Field	Value
Publication number	US-11912924-B2
Application number	US-201916702245-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Nov 27, 2019
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

The present invention provides a composition for antifreezing including a gold (Au) nanostructure in which at least a portion thereof is concave, thereby it is possible to increase a survival rate of cells due to having excellent effect of inhibiting ice recrystallization when cryopreservation of the cells, and maintain a texture of food even when using in the freezing of food.

First claim

What is claimed is:

1. A method for freezing a cell or tissue, the method comprising exposing a cell or tissue of a subject to a temperature below zero in the presence of a cryopreservation composition comprising a cryoprotective agent consisting of a gold (Au) nano structure in which at least a portion thereof is concave, wherein the gold (Au) nanostructure has a concave surface such that a liquid water layer is formed thereon and ice does not grow on the concave surface during the exposing the cell or tissue of the subject to the temperature below zero in the presence of the cryopreservation composition, and wherein the gold (Au) nanostructure has a shape of tetrahedron, hexahedron, octahedron, decahedron, dodecahedron, icosahedron, tetrakis hexahedron, hexakis octahedron, rhombic dodecahedron, cylinder, saddle or cap.

2. The method according to claim 1 , wherein the gold (Au) nanostructure has the shape of tetrahedron, hexahedron, octahedron, decahedron, dodecahedron, icosahedron, tetrakis hexahedron or hexakis octahedron.

3. The method according to claim 1 , wherein the gold (Au) nanostructure has a size of 10 nm to 1000 nm.

4. The method according to claim 1 , wherein the concave surface has an absolute value of a surface curvature of 0.1×10 −2 nm −1 to 5×10 −2 nm −1 .

5. The method according to claim 1 , wherein the gold (Au) nanostructure has increased hydrophilicity by modifying a surface thereof.

6. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of tetrahedron.

7. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of hexahedron.

8. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of octahedron.

9. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of decahedron.

10. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of dodecahedron.

11. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of icosahedron.

12. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of tetrakis hexahedron.

13. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of hexakis octahedron.

14. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of rhombic dodecahedron.

15. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of cylinder.

16. The method of claim 1 , wherein the gold (Au) nanostructure has the shape of cap.

17. A method for freezing a cell or tissue, the method comprising exposing a cell or tissue of a subject to a temperature below zero in the presence of a cryopreservation composition comprising a cryoprotective agent consisting of a gold (Au) nanostructure in which at least a portion thereof is concave, a surface of the gold (Au) nanostructure being modified to have a functional group, wherein the gold (Au) nanostructure has a concave surface such that a liquid water layer is formed thereon and ice does not grow on the concave surface during the exposing the cell or tissue of the subject to the temperature below zero in the presence of the cryopreservation composition, and wherein the gold (Au) nanostructure has a shape of tetrahedron, hexahedron, octahedron, decahedron, dodecahedron, icosahedron, tetrakis hexahedron, hexakis octahedron, rhombic dodecahedron, cylinder or cap.

Assignees

• Univ Korea Res & Bus Found

Inventors

• Ahn Dong June
• Lee Sang Yup
• Cho Yong Ho

Classifications

• A23B2/788

  Inorganic compounds · CPC title

• A01N1/125 Primary

  Freeze protecting agents, e.g. cryoprotectants or osmolarity regulators · CPC title

• A01N1/162

  Temperature processes, e.g. following predefined temperature changes over time · CPC title

• A23B2/85

  with addition of {or treatment with} chemicals · CPC title

• C09K5/20 Primary

  Antifreeze additives therefor, e.g. for radiator liquids (for application to surfaces C09K3/18; inhibiting corrosion by liquids C23F11/00) · CPC title