Dipropylene glycol methyl ether (DPGME) is one of the most commonly used propylene glycol ethers in industry and is discussed in a recently published NEG/NIOSH document. DPGME is a collective term describing a mixture of structural isomers.
The Incas were a civilization in South America formed by ethnic Quechua people also known as Amerindians. In 1400AD they were a small highland tribe, one hundred years later in the early 16th century the Incas rose to conquer and control the largest empire ever seen in the Americas forming the great Inca Empire.
The Inca Empire (Quechua: Tawantinsuyu, The Four Regions), also known as the Incan Empire, was the largest empire in pre-Columbian America. The administrative, political, and military center of the empire was located in Cusco in modern-day Peru.he Inca Empire was a federalist system which consisted of a central government with the Inca at its head and four quarters, or suyu: Chinchay Suyu (NW), Anti Suyu (NE), Kunti Suyu (SW), and Qulla Suyu (SE). The four corners of these quarters met at the center, Cusco.