lyophilisation
Học thuậtThân thiện
Definition
- Noun:
- A freeze-drying process: "Lyophilisation" is a specific technical term for a method of drying substances, typically sensitive biological materials like food, blood plasma, pharmaceuticals, or tissue. The process involves first freezing the material and then placing it in a vacuum where the frozen water (ice) transitions directly into vapor without passing through a liquid phase (sublimation). This preserves the material's physical structure.
Usage Examples
- Noun:
- The stability of the vaccine was greatly improved through lyophilisation.
- Lyophilisation is a critical step in the long-term preservation of many biological samples.
Advanced Usage
- "To undergo lyophilisation": to be processed using the freeze-drying method.
- The bacterial culture must undergo lyophilisation to remain viable for years.
Variants and Related Words
Lyophilize (verb): to dry (a substance) by freeze-drying.
- Scientists lyophilize the enzyme to create a stable powder.
Lyophilized (adjective): describes a substance that has been freeze-dried.
- The lyophilized plasma can be reconstituted with sterile water.
Lyophilizer (noun): the equipment used to perform freeze-drying.
- The new laboratory is equipped with a state-of-the-art lyophilizer.
Synonyms
- Freeze-drying: The most common synonym, describing the same process in less technical language.
- Cryodesiccation: A more technical synonym emphasizing drying from a frozen state.
Related Phrases
- "Sublimation in lyophilisation": refers to the core phase-change process where ice turns directly to vapor under vacuum.
- The efficiency of the cycle depends on the rate of sublimation during lyophilisation.
Noun
- a method of drying food or blood plasma or pharmaceuticals or tissue without destroying their physical structure; material is frozen and then warmed in a vacuum so that the ice sublimes