In communication , dissemination means spreading a message so that it reaches many people at the same time . The dissemination of a message or idea is frequently used in marketing, in this way companies promote the products or services they offer using mass communication channels.

Broadcasting also allows news to be heard through the media such as radio, television or the Internet. Each of these communication channels have their own methods and protocols for transmitting messages, but the objective will always be the same: to spread it massively.

In nature

In biology, physics and chemistry , it refers to the spontaneous movement of cells or molecules, respectively, that go from a medium of lower concentration to one of higher concentration, without producing extra energy . It is governed by Fick’s Law. This movement makes both media have, finally, the same level of concentration.

Graham’s Law states that the rates of diffusion and effusion of gases are inversely proportional to the square roots of the molar masses of substances. Effusion refers to gases that escape while previously under pressure.

Types of diffusion

In natural sciences

• Simple diffusion. It is the passive transport (without energy) of solutes and solvents in the free movement of molecules. This movement occurs between molecules of low weight and others with more weight. The medium with the lower concentration of molecules becomes equal to the medium with the higher concentration.
• Facilitated dissemination. Substances need transporters to be able to penetrate membranes, for example proteins that serve this purpose. Proteins bind to substances and pass through media until concentration increases.

Examples of diffusion

• News or articles on web portals.
• Videos played on the Internet.
• Videos played on screens in the street, as in New York avenues.
• Social media posts, which typically reach millions of people in real time.
• The smells that spread in a physical space.
• The oxygen that is in the environment.
• Smoke from cars, cigarettes, chimneys, etc., that spread through places close to their emission.
• The absorption of water by the roots in plant organisms.
• Uptake of oxygen from a cell that performs cellular respiration.
• Automobiles that run on hydrogen, within their mechanism diffusion of that gas is carried out.