milliosmole

ミリオスモル

関

mOsm、mosmol

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/08/21 23:46:26」(JST)

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This article is about the osmole unit. For the osmolarity, see Osmolarity.

In chemistry, the osmole (Osm or osmol) is a non-SI unit of measurement that defines the number of moles of a chemical compound that contribute to a solution's osmotic pressure. The term comes from the phenomenon of osmosis, and is typically used for osmotically-active solutions. For example, a solution of 1 mol/L NaCl corresponds to an osmolarity of 2 osmol/L. The NaCl salt particle dissociates fully in water to become two separate particles: an Na⁺ ion and a Cl^- ion. Therefore, each mole of NaCl becomes two osmoles in solution, one mole of Na⁺ and one mole of Cl^-. Similarly, a solution of 1 mol/L CaCl₂, gives a solution of 3 osmol/L (Ca²⁺ and 2 Cl^-).

A strict definition of an osmole is the number of osmotically active particles that, when dissolved in 22.4 L of solvent at 0 degrees Celsius, exert an osmotic pressure of 1 atmosphere. This is equivalent to the observation that 1 mole of a perfect gas occupying a volume of 22.4 L exerts a pressure of 1 atmosphere.

1 osmole = 1 mole of osmotically active particles = o(n)(C),

where o is the osmotic coefficient, n the number of particles resulting from dissociation of each molecule in solution and C the concentration of each molecule in mol/kg of water.

A milliosmole (mOsm) is 1/1000 of an osmole. A microosmole (μOsm) (also spelled micro-osmole) is 1/1,000,000 of an osmole.

References

English Journal

• Tear film osmolarity in patients with thyroid ophthalmopathy.

• Iskeleli G, Karakoc Y, Abdula A.SourceCerrahpasa Faculty of Medicine, Department of Ophthalmology, Istanbul University, Cerrahpasa, Istanbul, Turkey. giskeleli@superonline.com
• Japanese journal of ophthalmology.Jpn J Ophthalmol.2008 Jul-Aug;52(4):323-6. Epub 2008 Sep 5.
• PURPOSE: To compare tear film osmolarity between patients with thyroid ophthalmopathy and normal healthy subjects.METHODS: The tear film osmolarity in 15 normal subjects (15 eyes) (control group) and 21 patients (21 eyes) with thyroid ophthalmopathy was evaluated. Tear film osmolarity in milliosmole
• PMID 18773272

• Comparison of tear-film osmolarity in different types of contact lenses.

• Iskeleli G, Karakoç Y, Aydin O, Yetik H, Uslu H, Kizilkaya M.SourceDepartment of Ophthalmology, Istanbul University, Cerrahpaşa School of Medicine, Turkey. hrisib@ixir.com
• The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc.CLAO J.2002 Oct;28(4):174-6.
• PURPOSE: To investigate the tear-film osmolarity of contact lens wearers for different types of contact lenses.METHODS: Fifty six eyes of 56 cases were evaluated in four different groups according to the type of contact lens worn, with 14 eyes in each group. Groups 1 and 2 consisted of subjects who
• PMID 12394541

Related Links

• Osmole (unit) - Wikipedia, the free encyclopedia

... n the number of particles resulting from dissociation of each molecule in solution and C the concentration of each molecule in mol/kg of water. A milliosmole (mOsm) is 1/1000 of an osmole. A microosmole (μOsm) (also spelled micro-osmole) ...

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「mosmol」

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milliosmole、mosmol、mOsm