adjective inimical. Quotations. Pay attention to your enemies, for they are the first to discover your mistakes [Antisthenes]. You can discover what your enemy fears most by observing the means he uses to frighten you [Eric Hoffer The Passionate State of Mind ]. A man cannot be too careful in the choice of his enemies [Oscar Wilde Lady Windermere's Fan ].
A diffusion gradient, or concentration gradient, exists when an area of higher concentration is in contact with an area of lower concentration. When substances are in contact, particles may flow between them.he particles of a substance are in continuous, random motion in every direction, but there is a net flow of particles down the diffusion gradient or, in other words, from the area of higher concentration to the area of lower concentration.
Diffusion occurs in gases and with any substance in a solution. Therefore we can say that the definition of diffusion is as follows: Diffusion: The movement of particles from an area of high concentration to an area of low concentration until they spread out evenly. There are two important rules to remember. The larger the particles the slower the rate of diffusion. The greater the difference in concentration the greater the rate of diffusion. This difference is known as the concentration gradient. Example of diffusion in plant cells; Example of diffusion in animal cells