A concentration gradient refers to the difference in the amount of a substance between two regions. It shows how much of a substance is more concentrated in one place compared to another. Full definition
Cellular transport, migration and polarization all require membrane reorganization as well as initiation and maintenance of intracellular concentration gradients of distinct molecular species. (dresden-ipp.de)
Till and her colleagues were the first to use NanoSIMS ion probe measurements to document very sharp chemical concentration gradients in magma crystals, which allow a calculation of the timescale between reheating and eruption for the magma. (sciencedaily.com)
The role of the Dpp concentration gradient in the regulation of tissue is the subject of intense debate among scientists. (sciencedaily.com)