6 articles
Artificial ion pump
An artificial ion pump is a synthetic, bioinspired system that transports ions against their concentration gradient across a membrane using energy from light, pH, or electricity.
Osmosis
Osmosis, from the Greek for "push," is the net movement of water across a semipermeable membrane toward the higher solute concentration, quantified by van 't Hoff's law.
Osmotic concentration
Osmotic concentration, also called osmotic strength or osmolarity, is the concentration of osmotically active particles in a solution, expressed as osmoles per liter or per kilogram.
Plasmolysis
Plasmolysis is the separation of a plant cell's protoplast from its cell wall, caused by water loss in a hypertonic solution; it is generally reversible.
Semipermeable membrane
A semipermeable membrane, also called a selectively permeable membrane, is a barrier that lets some molecules or ions pass while blocking others, underlying osmosis, dialysis, and reverse osmosis.
Tonicity
Tonicity is the property of a solution that determines whether a cell will swell, shrink, or keep its volume, set by nonpenetrating solutes and expressed as hypotonic, isotonic, or hypertonic.