Arginine. Arginine, or L-arginine as it is called with its L-structure, is a semi-essential amino acid. Arginine is involved in many metabolic processes and important in the treatment of heart diseases and high blood pressure.
Layman's explanation: Nitric acid was first discovered in 1648 by a German chemist, Johann Rudolf. However, in 1901 Wilhelm Ostwald developed the Ostwald Process, which became the principle way of producing nitric acid.
Periodic Table of Elements. Iron was first discovered by the Egyptians in 4000 BC to make weapons and tools. This is called Iron Age because of the widespread use of iron. Iron comes from Latin word ferrum. It is reactive element, becomes rusty when exposed to damp air. This process is known as corrosion.