Search results
Results From The WOW.Com Content Network
In ancient Greek medicine, each of the four humours became associated with an element. Blood was the humor identified with air, since both were hot and wet. Other things associated with air and blood in ancient and medieval medicine included the season of spring, since it increased the qualities of heat and moisture; the sanguine temperament (of a person dominated by the blood humour ...
Several of the CPK colors refer mnemonically to colors of the pure elements or notable compound. For example, hydrogen is a colorless gas, carbon as charcoal, graphite or coke is black, sulfur powder is yellow, chlorine is a greenish gas, bromine is a dark red liquid, iodine in ether is violet, amorphous phosphorus is red, rust is dark orange-red, etc.
The color of chemicals is a physical property of chemicals that in most cases comes from the excitation of electrons due to an absorption of energy performed by the chemical. The study of chemical structure by means of energy absorption and release is generally referred to as spectroscopy .
The classical elements typically refer to earth, water, air, fire, and (later) aether which were proposed to explain the nature and complexity of all matter in terms of simpler substances. [ 1 ] [ 2 ] Ancient cultures in Greece , Angola , Tibet , India , and Mali had similar lists which sometimes referred, in local languages, to "air" as "wind ...
Light does not have a color but all colors are visible because of it. Elements like fire or other things that produce light all have light as their color. Relating back to the elements, when burned by fire air and water turn black. Such is the burning coals when doused in water. This is Aristotle's explanation of simple colors.
Air (or wind) element (vāyu-dhātu) Air element represents the quality of expansion or repulsive forces. Any matter where repulsive forces are in prominence are called air elements. Internal air elements includes air associated with the pulmonary system (for example, for breathing), the intestinal system ("winds in the belly and bowels"), etc.
Nitrogen glow Oxygen glow Electrical discharge in air Particle beam from a cyclotron. Ionized-air glow is the luminescent emission of characteristic blue–purple–violet light, often of a color called electric blue, by air subjected to an energy flux either directly or indirectly from solar radiation.
La Sylphide Bourbon, A.M. Bininger & Co. Bourbon advertising label in the shape of a glass showing a man pursuing three sylphs. The Swiss German physician and alchemist Paracelsus first coined the term sylph in the 16th century to describe an air spirit in his overarching scheme of elemental spirits associated with the four Classical elements.