Search results
Results from the WOW.Com Content Network
This alchemical symbol for platinum was made by joining the symbols of silver and gold . Antonio de Ulloa is credited in European history with the discovery of platinum. In 1735, Antonio de Ulloa and Jorge Juan y Santacilia saw Native Americans mining platinum while the Spaniards were travelling through Colombia and Peru for eight years. Ulloa ...
Platinum black (Pt black) is a fine powder of platinum with good catalytic properties. The name of platinum black is due to its black color. The name of platinum black is due to its black color. It is used in many ways; as a thin film electrode, a fuel cell membrane catalyst, or as a catalytic ignition of flammable gases for "self-lighting' gas ...
The Golden Wand of Medicine: A History of the Caduceus Symbol in Medicine. Contributions in Medical Studies, 35. New York: Greenwood Press. ISBN 0-313-28023-1. Holmyard, Eric J. (1957). Alchemy. Harmondsworth: Penguin Books. OCLC 2080637. Reutter de Rosemont, Louis (1931). Histoire de la pharmacie a travers les ages. Vol. II.
The 70th anniversary of any important event can be referred to as a platinum jubilee, although this term is seldom used. Music. a platinum album is an album whose sales figures have reached a certain amount. This threshold differs from market to market—in the United States, a platinum album is one that has sold at least 1,000,000 copies.
A small box from the burial of the Pharaoh Shepenupet II (died around 650 BC) was found to be decorated with gold-platinum hieroglyphics, [36] but the Egyptians may not have recognised that there was platinum in their gold. [37] [38] First European description of a metal found in South American gold was in 1557 by Julius Caesar Scaliger.
As noted by ASALH's official website, the theme for Black History Month 2023 is Black Resistance, which emphasizes the "ongoing oppression" of Black people throughout American history.
Some explanations of Black Friday claim that the holiday references a 19th-century term for the day after Thanksgiving, during which plantation owners could buy slaves at discount prices.
Hugh Hefner, the man who created a magazine empire, died Wednesday at the age of 91. His legacy includes some of the most famous Playboy playmates ever to grace the cover and go one to become ...