Arbejdsprincippet om vakuumfrysetørrer

Efter start af maskinen skal du sætte materialet i materialet til frysning . i materialets frysningsproces, på den ene side, vakuumsystemet vakuumiserer for at fjerne en del af vandet; På den anden side, når materialet er frosset, udledes vandet i nogle molekyler til materialets overflade frosset. efter at have opfyldt frysekrav Materiale .

Freeze drying refers to the process of removing moisture or other solvents from frozen biological products through sublimation. Sublimation refers to the process by which a solvent, such as water, like dry ice, changes directly from a solid state to a gaseous state without going through a liquid state. The product obtained by freeze-drying is called a lyophilizer, and the process is called lyophilization. Traditional drying can cause the material to shrink, destroying cells. The structure of the sample is not destroyed during freeze-drying because the solid components are supported by the solid ice in their place. As ice sublimates, it leaves pores in the dry leftover material. This preserves the integrity of the product's biological and chemical Struktur og dens aktivitet . I laboratoriet har lyofilisering mange forskellige anvendelser, og det er uundværligt i mange biokemiske og farmaceutiske anvendelser . Det bruges til at opnå langvarig opbevaring af biologiske materialer, såsom mikrobielle kulturer, enzymer, blod og farmaceutiske stoffer, der bevarer deres inhere-biologiske aktivitet og strukturer med længden til at få længder til længder til at få tildelt længder, der er længet af længderne, længder long. stability. To this end, lyophilization is used to prepare tissue samples for structural studies such as electron microscopy studies. Freeze-drying is also used in chemical analysis to obtain samples in a dry state, or to concentrate samples to increase analytical sensitivity. Freeze-drying stabilizes the composition of the sample without changing the chemical composition, making it an ideal Analytisk hjælp . Frysetørring kan forekomme naturligt . i naturen, denne proces er langsom og uforudsigelig . med frysetørringssystemer, mange trin er blevet raffineret og opdelt for at fremskynde processen .