permeability assays

Permeability assays are tests that measure how easily substances, like fluids or small molecules, pass through a barrier such as a cell layer or tissue. They help researchers understand the barrier's integrity and function, which is important in studying things like blood vessels, intestinal lining, or drug absorption. By tracking how much of a substance moves over time, scientists can evaluate how permeable the barrier is, informing health, disease, or drug delivery research. Essentially, it's a way to quantify how open or restrictive a barrier is to passing substances.