iStockphoto.com/Andrea Laurita. The BRYCS Clearinghouse is an online collection of resources related to refugee and immigrant children and families. It is geared towards front-line workers, program planners, and administrators as well as researchers and policy-makers.
Define cation exchange: ion exchange in which one cation (as sodium or hydrogen) is substituted for one or more other cations (as calcium andâ¦ ion exchange in which one cation (as sodium or hydrogen) is substituted for one or more other cations (as calcium and magnesium in hard water)â¦ See the full definition since 1828
Gas exchange. Gas exchange is a biological process through which different gases are transferred in opposite directions across a specialized respiratory surface. Gases are constantly required by, and produced as a by-product of, cellular and metabolic reactions, so an efficient system for their exchange is extremely important.