A skin lesion KOH exam is a simple skin test to check if an infection in the skin is caused by fungus. KOH stands for potassium (K), oxygen (O), and hydrogen (H). These elements make up potassium ...

Looking at the kaliapparat, first built in the fall of 1830 by German chemist Justus Liebig, you’d be forgiven for focusing on the glassware’s pleasing design rather than its historical importance.

In 1807AD, potassium was first prepared by English chemist Sir Humphrey Davy. Davy melted a small amount of potash, and an passed electric current through it. He discovered that a small liquid droplet ...