osmotic pressure

The pressure exerted by the flow of water through a semipermeable membrane separating two solutions with different concentrations of solute.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

osmotic pressure

(Chemistry) the pressure necessary to prevent osmosis into a given solution when the solution is separated from the pure solvent by a semipermeable membrane

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

osmot′ic pres′sure

the force that a dissolved substance exerts on a semipermeable membrane, through which it cannot penetrate, when separated by it from pure solvent.

[1885–90]

osmotic pressure

The pressure that must be applied to a solution, when separated from a more dilute solution by a semipermeable membrane, to prevent the inflow of solvent molecules.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

osmotic pressure - (physical chemistry) the pressure exerted by a solution necessary to prevent osmosis into that solution when it is separated from the pure solvent by a semipermeable membrane

physical chemistry - the branch of chemistry dealing with the physical properties of chemical substances

force per unit area, pressure, pressure level - the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit); "the compressed gas exerts an increased pressure"

hypertonicity - (of a solution) the extent to which a solution has a higher osmotic pressure than some other

hypotonicity - (of a solution) the extent to which a solution has a lower osmotic pressure than some other

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References in periodicals archive

The concentration of NaCl required to obtain the osmotic pressure of -0.3 and -0.6 MPa was calculated by the van't Hoff equation (HILLEL, 1971): [PSI]s = -RTCi, where [PSI]s is the osmotic pressure (MPa); R is the ideal gas constant (0.008314 MPa [mol.sup.-1] [K.sup.-1]); T is the absolute temperature (273.15 + [degrees]C); C is the concentration in molarity of the solute (mol [L.sup.-1]); and i is the van't Hoff factor, the ratio of amount of particles in solution to the amount of formula units dissolved [i.e., for NaCl this value is 2.0 (Na+ and [Cl.sup.-])].

Seed priming improves the germination and growth rate of melon seedlings under saline stress/Condicionamento de sementes melhora a germinacao e a taxa de crescimento das plantulas de melao sob estresse salino

Eqn 3 is more of an 'energy balance' than a 'mass balance' and its origin lies in Van't Hoff s equation: [pi] = nRTc, where tt is osmotic pressure (Pa), n is the degree of dissociation (dimensionless), R is the gas constant (J [mole.sup.-1] [K.sup.-1]), T is temperature (K) and c is the concentration of solutes (mole [m.sup.-3]).

Plant available water in saline soils--revisited

Both of the above situations were unfavorable for PS core to form sufficient osmotic pressure to crack the PUB shell and the PS core could not protrude by swelling.

Synthesis of Anisotropic Janus Composite Particles Based on Poly(urushiol borate)

On the other hand, fructose was used as control to count for the osmotic pressure variable, though it shows effect on the cell proliferation at a time.

GHRH-R Expression Level under Hyperglycaemic Like Culture Conditions in Breast Cancer Cell Lines

Which the osmotic pressure contribution [[sigma].sub.s] ([[pi].sub.b]-[[[pi].sub.i]) is small (Stohrer, Boucher, Stangassinger, & Jain, 1995; 2000), Equation 5 reduces to Equation 6:

Characteristics of interstitial fluid flow along with blood flow inside a cylindrical tumor: a numerical simulation/Caracteristicas do fluxo de fluido intersticial junto com o fluxo sanguineo no interior de um tumor cilindrico: uma simulacao numerica

Osmotic pressure could be adjusted from 0.1 MPa to 0.5 MPa using a pneumatic pump.

Effect of Osmotic Pressure on Migration Behavior of nZnO in GCLs

Effect of Hemodialysis on Plasma Osmotic Pressure and Blood Biochemical Parameters (Table 2).

Effect of Hemodialysis on Eye Coats, Axial Length, and Ocular Perfusion Pressure in Patients with Chronic Renal Failure

Low levels can be insufficient to modulate blood flow or osmotic pressure, while excessively high levels can have a negative restrictive effect on blood flow.

Do compression sports clothes really improve performance?

20 [micro]l supernatant has been taken by centrifuging the sperm conserved in Hank's solution for 5 minutes at 12,000 rpm and its osmotic pressure has been measured in micro osmometer device.

Different Heat Shock Application Effect on Gynogenetic Production of Zebrafish (Danio rerio)

Concentration gradients of dissolved solutes create osmotic pressure across semi-permeable membranes.

Supporting the clinical lab in chemistry, microbiology, and hematology