Abstract
The process of freezing biological material at extremely low temperatures is known as cryopreservation. To ensure the preservation of cells and tissues over an extended period of time, low temperatures are applied since biological processes, including the biochemical ones, come to a halt under cryogenic conditions and thus it is possible to maintain their structural and functional integrity. The field of cryopreservation gained more prominence in the 20th century and emerged as an unavoidable technology for different applications such as cell therapy, tissue engineering, or assisted fertilization. In this work we provide an overview of various technologies in the field of cryotechnology with regard to the freezing, storage and thawing of living cells. The first part covers the freezing process, starting with cryoprotective agents regarding their protection mechanisms and compositions, passing by cryoimaging, micro-fluidic systems, and the currently available freezing and biobanking equipment. The second part focusses on the thawing process as well as the hypothermic preservation for the short-term storage of biological materials and constructs.
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