micelle


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micelle

 [mi-sel´]
a supermolecular colloid particle, most often a packet of chain molecules in parallel arrangement.

mi·celle

(mi-sel', mī-sel'),
1. Nägeli term for elongated sub(light)microscopic particles, detected in hydrogels, of supramolecular character and crystalline structure; now defined as one of two classes of colloidal particle: those consisting of many molecules, the other class being single macromolecules light- or submicroscopic in size. A micelle is thus a structural unit of the disperse phase in a gel, a unit whose repetition in three dimensions constitutes the micellar structure of the gel; it does not denote the individual particles in free suspension or solution, or the unit structure of a crystal.
2. Any water-soluble aggregate, spontaneously and reversibly, formed from amphiphile molecules.
3. A hypothetical ordered region in a natural fiber such as cellulose.
[L. micella, small morsel, dim. of mica, morsel, grain]

micelle

(mī-sĕl′)
n.
A submicroscopic aggregation of molecules, as a droplet in a colloidal system.

mi·cel′lar (-sĕl′ər) adj.

micelle

Chemistry
An organised component of colloidal suspensions, consisting of spherical or laminar aggregates of polar surface-active molecules (soaps). The hydrophilic portion of the molecule interacts with the other members of the aqueous solution (i.e., are oriented outside in water); the hydrophobic ends huddle together within the micelle.

Micelles of the small intestine are composed of bile salts with fatty acids and monoglycerides released by pancreatic lipase.
 
Molecular biology
The structure formed by amphipathic molecules in solution, which places the polar group toward the solution and the hydrophobic group toward the interior.

micelle

a cluster of phospholipid molecules in the gut which are dispersed by the action of BILE salts.

mi·celle

(mi-sel')
1. Elongated sub(light)microscopic particles, detected in hydrogels, of supramolecular character and crystalline structure.
2. Any water-soluble aggregate, spontaneously and reversibly, formed from amphiphile molecules.
3. A hypothetical ordered region in a natural fiber such as cellulose.
[L. micella, small morsel, dim. of mica, morsel, grain]

micelle (mīsel´),

n a space formed by the brush structure of fibrils in colloidal gels. The spaces are occupied by water in hydrocolloid impressions.

micelle

a supermolecular colloid particle, most often a packet of chain molecules in parallel arrangement. A stage in the luminal phase of fat digestion; bile salts form spheres containing fatty acids, monoglycerides and the fat-soluble vitamins.

critical micelle concentration
the concentration of bile salts in solutions at which they aggregate into poymolecular aggregates called micelles.
References in periodicals archive ?
PEG-PLA micelles can be sensitized towards different extrinsic and intrinsic stimuli such as pH, hyperthermia and redox condition of the tumour cell by incorporating some structural changes in the micelle.
Micelle sizes of B-MM and CUR-MM were determined by particle size analyzer (Malvern 2000SM, Instruments, UK).
The loss of micelle structure is due to increased level of hydration and dissolution of colloidal calcium phosphate and caseins at pH 5.
Typically, the core of micelle is hydrophobic while the exposed surface of the micelle is hydrophilic in nature.
Individual micelles alone can't easily penetrate the unstirred water barrier.
The study, 'Oral bioavailability of curcumin from micronized powder and liquid rnicelles is significantly increased in healthy humans and differs between sexes', provides strong data demonstrating enhanced systemic uptake and sustained circulation of NovaSOLO curcumin micelles in comparison to both native curcumin and curcumin micronisate.
Denss, "The definition of a micelle revisited," Journal of Colloid And Interface Science, vol.
The special polymers are integrated into the surfactant micelles to give the following effects:
Fevola of Johnson 8, Johnson explained how polymers comprised of covalently-linked amphiphilic repeat units (ARUs) are a very effective way of achieving micelle size distributions with low small micelle fraction values and therefore, low irritation potential.