Disperse references

Calibration refers to characterizing the residence time in the GPC as a function of molecular weight. Axial dispersion refers to the chromatogram being a spread curve even for a monodisperse sample. A polydisperse sample then is the result of a series of overlapping, unseen, spread curves. 

The dispersant used in these studies is Chevron Chemicals OLOA 1200, a polybutene of about 70 carbon atoms attached to a succinic acid group which is reacted with diethylene triamine to provide the basic anchoring group. Film balance studies showed that the adsorbed films have a film thickness of 50 X. This dispersant is supplied as a 50 w% solution in a mineral oil. It can be deoiled by adsorption from toluene onto silica with elution by acetone. In this paper the w% of dispersant refers to the deoiled material. 

Hydrodynamic dispersion refers to the tendency of a solute or chemical dissolved in the fluid, to spread out over time (i.e., to become dispersed in the subsurface). The mechanical component of dispersion results from the differential flow of the fluid through pore spaces that are not the same size or shape, and from different flow velocities and the fluid near the walls of the pore where the drag is greatest vs. the fluid in the center of the pore (Figure 5.4). 

Dispersion is a term for systems containing various phases of at least one continuous and one finely dispersed. Referring to mineral slurries, this is typically a suspension of a mineral in water. This suspension normally contains some more additives for improved stability. One important additive in these systems is the dispersant. Interparticle forces hold the particles together and these interactions are reduced by the use of dispersants. This can be indicated by improved rheology profiles. 

While still sensitive to the medium environment, the ease of dispersion rather than particle size may be a better measure of the performanoavo. Ease of dispersion refers to the facility for the formulation to mix with the aqueous phase and is typically represented by low interfacial tensions. 

Note that as Hz = s-1, when we divide by hertz we get seconds. With this delay, the net magnetization will rotate from the xf axis to the / axis, and the peak in the spectrum will be dispersive (reference axis = x ). 

The term dispersion refers to how well the pigments are wetted out in the plastic matrix (see below), whereas distribution refers to the uniformity of color in the part. Finally, in referring to the parts fabrication process, the term molder is used below to represent any the following pieces of equipment injection molding machine, injection or extrusion blow molding machine, or rotational molding machine. 

Dispersion refers to the variety or "spread" of individual observations in a sample. As for central tendency there are various measures of dispersion. 

In the basic governing equation of advection-diffusion, dispersion refers to the movement of species under the influence of gradient of chemical potential, while advection is the stirring or hydrodynamic transport caused by density gradient or forced convection. A general one-dimensional mass transfer to an electrode is governed by the Nemst-Planck equation ... 

Hydrodynamic dispersion refers to the stretching of a solute band in the flow direction during its transport by an advecting fluid. Variation in the fluid velocity across the channel cross section leads to such band broadening which is often quantified in terms of the Taylor-Aris dispersion coefficient. 

Figure 3.3. Computer generated 2D images of particles/voids with connecting lines (a) relatively even dispersion referred to as Type F, (b) intermediate dispersion referred to as Type n , and (c) relatively flocculated dispersion referred to as Type ni [35]...

As mentioned, dispersant design and mode of action are well understood by surface and colloid scientists [43, 112-115]. In that field, the term dispersant refers to any additive that reduces the interparticle interactions, thereby encouraging dispersion of the particles. This is achievable via a number of mechanisms using low molecular weight, oligomeric, or polymeric additives [128]. Steric stabilisation is most relevant to mineral fillers in polymers because it is the main way to achieve colloidal stability in low polarity solvents. This stabilisation mechanism operates by strong adsorption of a layer of organic additive that physically prevents close interparticle approach. 

The term dispersion refers to the emission or absorption of energy— that is, a loss peak—at a transition. In practice, the literature sometimes uses these terms somewhat interchangeably. 

Bin Blender. In contrast to convection, which can effectively intersperse grains in a tumbler within tens to hundreds of revolutions, is dispersion, or diffusion. Dispersion refers to the random relocation of individual grains due to collisions between adjacent particles and can take hundreds to thousands of revolutions to act. Thus, particles can only cross a plane separating the two arms of the V-blender (or an equivalent symmetry plane in many other blender geometries) as a result of occasional collisional happenstances and not... 

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