Meaning of Diffusion
What is Diffusion:
Diffusion refers to the spread of molecules, solutes, solvents, news, information, thoughts, trends, or cultures from one medium to another.
The word diffusion indicates the action of diffusing, it derives from Latin diffusio, composed of the prefix dis-, which means 'separation', and I will melt, which indicates 'pour' or 'melt'.
In physics and chemistry, diffusion refers to the movement of molecules of a substance, gas or liquid, from a medium of lower concentration to a medium of higher concentration, without the additional generation of energy.
Diffusion also indicates the dissemination of ideas, knowledge, culture or news. In this sense, the dissemination of the aforementioned elements usually uses the media such as the press, television, radio or social networks to spread them to a wider audience.
Diffusion in chemistry
In chemistry, diffusion is the way in which both solute and solvent pass through permeable membranes from a medium of higher concentration to one of lower concentration until both mediums reach the same concentration level.
Diffusion in physics
In physics, diffusion allows the uniform distribution of a substance, gas or body in two media by the spontaneous movement of the molecules. In this sense, diffusion transports them down the concentration gradient.
Diffusion in biology
In biology, diffusion is considered a form of passive cellular transport, since it does not need additional energy for it to occur. Biological diffusion can be divided into simple diffusion and facilitated diffusion.
Simple diffusion occurs in low molecular weight substances such as water (H2O), dissolved gases (O2, CO2) and fat-soluble molecules (ethyl alcohol, vitamin A).
Simple diffusion is the passive transport of solutes and solvents by the free movement of molecules. Diffusion is generated through permeable membranes from a medium of higher concentration to that of lower concentration until the concentration is equalized.
See also Solute and solvent.
The facilitated diffusion of substances requires transporters to pass through selectively permeable membranes. Mediators can be channel proteins or carrier proteins.
Channel proteins are those that can control the opening and closing of channels located in the phospholipid double layer of the cytoplasmic membrane and thus pass through with the molecules.
In diffusion, transporter proteins bind to the substance and transport it across the membrane down the concentration gradient.
Diffusion and osmosis
Diffusion and osmosis are forms of cellular transport.
Diffusion is the transfer of solute and solvent from a more concentrated medium to a less concentrated one through permeable membranes.
Osmosis is the passage of the solvent or solvent such as, for example, water, through a semi-permeable membrane from the medium where there is a lower concentration to a higher concentration.
See also Osmosis.
Diffusion of the printing press
The spread of the printing press allowed ideas and knowledge to be transmitted on a massive scale.
The invention of the printing press (or mechanization of printing) by the German Johannes Gutenberg in 1440 gave way to the mass production of culture, ideas and knowledge.
The spread of the printing press helps the flowering of Renaissance humanism with the free flow of information, increased literacy, increased culture and the creation of a new medium of communication: the press.