Freeze-dried describes a method of preservation in which a substance, typically food or biological material, is dehydrated by freezing it and then reducing the surrounding pressure to allow the frozen water to sublimate directly from a solid to a gas phase. This process, also known as lyophilization, removes moisture without significantly altering the structure or nutritional content of the item. Freeze-drying is prized for preserving the original shape, color, flavor, and texture of the product, and it extends shelf life dramatically. It’s commonly used for foods like fruits, vegetables, coffee, and complete meals for outdoor adventuring, military provisions, and even space travel. The result is a lightweight, shelf-stable product that reconstitutes easily with water.
Freeze-dried meaning with examples
- The astronauts ate freeze-dried ice cream to celebrate their successful mission. The light, crispy squares were a treat, packed with all the flavors of the original dessert, yet required no refrigeration and weighed very little. This convenience, and the ability to rehydrate food at a distant time, made it a perfect choice for long-duration missions. The freeze-drying process ensured it retained its texture and essential nutrients, providing vital energy in a unique package.
- Backpackers find freeze-dried meals essential for long hikes. They can carry a week's worth of dinners in a small, lightweight pack because the moisture is removed and the food is compact. Rehydrating the food with hot water at the end of the day produces a flavorful and filling meal. The compact and lightweight properties are vital as this allows adventurers to stay fueled with a delicious food and keep overall weight down, especially for longer excursions.
- Scientists often use freeze-drying to preserve delicate biological samples, such as vaccines and tissue specimens. Freeze-drying maintains the integrity of the sample and protects it from degradation over time. The freeze-drying process protects the sample from enzymatic and microbial actions that could damage the active compounds. This ensures the sample remains stable and viable for research or medical applications long after it has been originally processed.
- Emergency food supplies often include freeze-dried items. During natural disasters, these foods provide essential nutrients and energy when fresh food is scarce. Easy to store and quick to prepare, these meals provide a vital support in times of crisis. Their extended shelf life makes them ideal for stockpiling in preparation for unforeseen circumstances. Their compact nature allows distribution to areas affected by these events.
Freeze-dried Crossword Answers
11 Letters
LYOPHILISED LYOPHILIZED