Can you freeze dry things at home?

Can you freeze dry things at home? Freeze drying works great for fruits and vegetables, but unlike other options, it also perfectly preserves meat, fish, dairy, eggs, ice cream, and even fully-cooked meals. Not only will the food you freeze dry at home look and taste better than store-bought freeze-dried food, it’s much less expensive! […]

Who first discovered Louisiana?

Who first discovered Louisiana? Robert Cavelier de La Salle Why is Louisiana called Louisiana? You may know that Louisiana was named for French King Louis XIV. The territory was named in his honor by French explorer La Salle, who claimed the territory to the west of the Mississippi River in the 1680s for France. When […]

What isotopes are used in smoke alarms?

What isotopes are used in smoke alarms? Am-241, with a half-life of 432 years, was the first americium isotope to be isolated, and is the one used today in most domestic smoke detectors. Am-241 decays by emitting alpha particles and gamma radiation to become neptunium-237. Is americium-241 a radioisotope? Americium-241 (241Am, Am-241) is an isotope […]

What is the purpose of surface hardening?

What is the purpose of surface hardening? Surface hardening, treatment of steel by heat or mechanical means to increase the hardness of the outer surface while the core remains relatively soft. What is laser surface hardening? Laser hardening—also referred to as laser case hardening—is a heat treating process used to improve the strength and durability […]

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