osmotic pressure


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Related to osmotic pressure: osmotic potential

osmotic pressure

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

osmotic pressure

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

osmot′ic pres′sure


n.
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:
Noun1.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
References in periodicals archive ?
Then, competition of the two opposite processes appears: on the one hand, due to the osmotic pressure between hydrogel and the external solution, the solution enters gradually.
Contact with water of lowered osmotic pressure can induce tissue damage to the animal (van Woesik et al.
There is no change to the volume of body cells as the movement of water is not stimulated by osmotic pressure changes.
The pressures involved in the Starling equation are (1) hydrostatic pressure in the pulmonary capillary, (2) colloid osmotic pressure in the pulmonary capillary, (3) hydrostatic pressure in the pulmonary interstitium, and (4) colloid osmotic pressure in the pulmonary interstitium.
CAT mRNA expression increased gradually with changes in osmotic pressure, and similar to SOD mRNA expression, the CAT mRNA level was lower with Diets 2 and 3 than with Diet 1 (Figure 2C).
He concluded that for Krichauff wheat growing in pots, the osmotic effect became dominant and severely restricted plant growth when the soil solution EC increased above a 'threshold value', which was 25 dS/m, corresponding to an osmotic pressure of 900 kPa.
The external NaCl aqueous solution could decrease the osmotic pressure difference between the polymeric network and external solution.
Examples are (1) an increased permeability across the either pleural membrane, (2) a decrease in the vascular osmotic pressure, (3) an increased capillary hydrostatic pressure, (4) a decreased lymphatic drainage, and (5) an increased osmotic pressure in the intrapleural space.
The osmotic pressure is used to calculate the impact of salinity on water uptake and plant yield.
Herszage has suggested that bacteria in the wound become dehydrated when the high osmotic pressure fostered by the sugar draws their water out; Knutson says the sugar may block the bacteria's access to nearly nutrients.
Plant growth and development in saline soil is scanty due to high osmotic pressure that finally cause to reduction in water availability [6].
Additionally, the amount of hydrophilic groups in the composite decreased with increasing APT content, and then the osmotic pressure between polymer network and external solution decreased, which also contributed to the decrease of water absorbency.