freeze-drying
Học thuậtThân thiện
Definition
Noun: - A preservation process: A method of drying substances, such as food, blood plasma, pharmaceuticals, or biological tissue, by first freezing them and then removing the ice by sublimation (turning ice directly into vapor) under a vacuum. This process preserves the physical structure of the material.
Usage
- Primary Use: Describes the specific technical process of dehydration by sublimation.
- Freeze-drying is essential for preserving the viability of many vaccines.
- The museum uses freeze-drying to restore water-damaged documents.
Advanced Usage
- In a Scientific Context: Often discussed in relation to its advantages over other drying methods, as it minimizes damage to cellular structure.
- The research paper compared the shelf life of herbs preserved by air-drying versus freeze-drying.
Variants and Related Words
- Freeze-dry (verb): To preserve something using the freeze-drying process.
- They freeze-dry the strawberries to use in breakfast cereals.
- Lyophilization (noun): A technical synonym for freeze-drying, commonly used in pharmaceutical and biochemical contexts.
- Lyophilize (verb): The verb form of lyophilization.
Synonyms
- Lyophilization (formal/scientific synonym)
- Cryodesiccation
Notes on Meaning
This term refers specifically to the complete industrial or laboratory process. It is not typically used for natural phenomena (e.g., frost drying out a plant).
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