Absorption is a research area that focuses on the process by which molecules, particles, or fluids are taken up or assimilated by another substance. This can refer to the uptake of gases, liquids, or solids by a solid or liquid material. Understanding absorption processes is important in various fields such as chemistry, biology, environmental science, and materials science. Researchers in this area study the mechanisms, kinetics, and factors that influence absorption in order to develop better materials, technologies, and strategies for various applications.