At this moment there are no hydraulic piping stand- ards available which cover different pressure classes and piping materials as well as being gener- ally suited for all applications.
A high concentration simply means there is a high percentage of solute particles dissolved in the solvent and the solution is said to be concentrated. And a low concentration means there is not a high percentage of solute particles in the solvent and the solution is said to be diluted. high concentration of something, like a hormone in the blood, means there is a lot of it. A low concentration of something means there is not a lot of it, but a little.
Concentration gradient is defined as the variation in the concentration of solute, from one region to another, in a solution. While studying the movement of particles in a medium, you may come across various chemistry terms. To mention a few, such terms include concentration gradient, diffusion and osmosis.