isopycnic การใช้

• Isopycnic typically describes surfaces, not processes.
• Another applicable technique is cofractionation in sucrose ( or other material ) gradients using isopycnic centrifugation.
• In other words, it is a flow in which isobaric surfaces are isopycnic surfaces and vice versa.
• In general isopycnic surfaces will occur in fluids in hydrostatic equilibrium coinciding with equipotential surfaces formed by gravity.
• Isopycnic surfaces contrast with isobaric or isothermal surfaces, which describe surfaces of constant pressure and constant temperature respectively.
• Isopycnic centrifugation refers to a method wherein a density gradient is either pre-formed or forms during high speed centrifugation.
• If the ocean surface were isopycnic ( of constant density ) and undisturbed by tides, currents, or weather, it would closely approximate the geoid.
• The density of most liquids is nearly constant ( isopycnic ), so it can be stated that their densities vary only weakly with pressure and temperature.
• Water masses can travel across the ocean as turbulent eddies, or parcels of water usually along constant density ( isopycnic ) surfaces where the expenditure of energy is smallest.
• It is common in conversational use to hear isopycnic surfaces referred to simply as " iso-density " surfaces, which while strictly incorrect, is nonetheless abundantly more clear.
• The term " isopycnic " is also encountered in biophysical chemistry, usually in reference to a process of separating particles, subcellular organelles, or other substances on the basis of their density.
• The term " isopycnic " is commonly encountered in the fluid dynamics of compressible fluids, such as in meteorology and geophysical fluid dynamics, astrophysics, or the fluid dynamics of explosions or high Mach number flows.
• Caesium chloride is widely used medicine structure in isopycnic centrifugation for separating various types of DNA . It is a reagent in analytical chemistry, where it is used to identify ions by the color and morphology of the precipitate.
• Unless there is a flux of mass into or out of a control volume, a process which occurs at a constant density also occurs at a constant volume and is called an isochoric process and not an isopycnic process.