dispersion

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dispersion

 [dis-per´zhun]
1. the act of scattering or separating; the condition of being scattered.
2. the incorporation of the particles of one substance into the body of another, comprising solutions, suspensions, and colloid systems.
3. a colloid system, particularly an unstable one.

dis·per·sion

(dis-pĕr'zhŭn),
1. The act of dispersing or of being dispersed. Synonym(s): dispersal
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution.
4. The extent or degree in which values of a statistical frequency distribution are scattered about a mean or median value.
[L. dispersio]

dis·per·sion

(dis-pĕr'zhŭn)
1. The act of dispersing or of being dispersed.
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution
4. The extent or degree to which values of a statistical frequency distribution are scattered about a mean or median value.
[L. dispersio]

dispersion

the distribution of individual organisms once any DISPERSAL has taken place. For example, organisms may be randomly dispersed, under-dispersed (aggregated) or over-dispersed (as in territorial animals). Dispersion should not be confused with DISTRIBUTION which normally refers to a species as a whole and not to individuals.

dispersion

Phenomenon of the change in velocity of propagation of radiation in a medium, as a function of its frequency, which causes a separation of the monochromatic components of a complex radiation. All optical media cause dispersion by virtue of their variation of refractive index with wavelengths. Dispersion is specified by the difference in the refractive index of the medium for two wavelengths. The difference between the blue F (486.1 nm) and the red C (656.3 nm) spectral lines is called the mean dispersion, i.e. nFnC. Dispersion is usually represented by its dispersive power ω or relative dispersion which is equal to the mean dispersion divided by the excess refractive index of the helium d (587.6 nm) spectral line (nd − 1), often called the refractivity of the material,
ω = nFnC/nd − 1
The reciprocal of the dispersive power is called the Abbé's number or constringence (Fig. D8). See aberration longitudinal chromatic; achromatic axis; Fraunhoffer's lines; achromatic prism.
Fig. D8 Dispersion of a white beam of light by a prismenlarge picture
Fig. D8 Dispersion of a white beam of light by a prism

dis·per·sion

(dis-pĕr'zhŭn)
1. Dispersing or being dispersed.
2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions).
3. Specifically, what is usually called a colloidal solution
[L. dispersio]
References in periodicals archive ?
If you are involved in the Polyurethane Dispersions industry or aim to be, then this study will provide you inclusive point of view.
Diamond Dispersions has responded effectively to the rapidly growing digital print market by supporting customers as they seek to deliver customization, shorter print runs, just-in-time manufacturing and a desire for reduced stocks and wastage.
Fumed silica/fumed alumina dispersions lend themselves to coating applications due to the superior degree of dispersion down to the hundreds of nanometer level.
These materials are added to the latex during compounding, as separate water-based dispersions. At Akron Dispersions, the company can combine many of these ingredients into a single masterbatch.
RJA Dispersions will become part of Sun Chemical's Performance Pigments' digital business unit, led by Peter O'Loughlin.
It has been reported that sodium cholate has potential value in the range of -20 mV to -48.8 mV in dispersions of single walled carbon nanotubes [29].
The research presented in this paper aims to clarify possible changes in the functional properties of epoxy dispersions in the course of their storage at room temperature.
The resultant poly(NIPAAm-co-AAm) nanogel aqueous dispersions were further dialyzed and subsequently lyophilized to collect xerogel for further measurements.
Large strain shear rate data indicated that all of the dispersions were shear-thinning.
Knowledge of the rheological properties (plasticity and non-Newtonian fluid mechanics under stress) of particulate dispersions and two- phase solid composites are required in many engineering applications.
Specializes in standard and custom pigment dispersions for pultrusion, SMC, BMC, RTM, and spray-up/hand lay-up.
As expected, other hydrophilic dispersants, such as polyphosphates, produce poor dispersions when used with the associative thickeners.