Diffusion commonly refers to the spontaneous movement of a substance (gas, liquid, or solid) into its surrounding area. The molecules, or particles, that make up the substance distribute over time from an area of higher concentration to an area of...

Diffusion is a process in which the random motion of molecules or other particles results in a net movement from a region of high concentration to a region of lower concentration. Familiar examples include the spread of tobacco smoke throughout the...

The physical dispersion, without chemical reaction, of one fluid material within another by the action of the movement of atoms or molecules of the two substances concerned. In terms of light, diffusion is the random dispersal of light waves caused or...

Molecules will always move from areas of high concentration to lower concentrations: the difference between the two levels is called a concentration gradient. In practice, concentration gradients typically exist across a membrane, and more...

The term diffusion is derived from the Latin verb husionere which means "to break" but can also mean "leave way" and one encounters two usages which can be associated with Fick's laws. Fick's first law deals with the passage of a gas through a semi...

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In a building far from public view in the tree-covered hills of southern Ohio, the company that recycles uranium from Russian warheads for fueling U.S. nuclear power plants is preparing to demonstrate an advance from Cold War technology.USEC Inc., which last month began interior construction...

One downside to developing a successful electronics product such as the Apple iPod is that it often becomes a bull's-eye that hackers try to hit. "Hackers have big egos and their main goal is to get their work into the newspaper," said Peter Lindstrom, an...

A series of four experiments related to diffusion, or the process through which a substance goes from a high concentration to a low concentration. The experiments enable students to learn more about the properties of diffusion, osmosis, water potential, and plasmolysis pertaining to the study of science.