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Dispersion free state

On analysis by Bell [30] the proof was shown to rely on the assumption that dispersion-free states have additive eigenvalues in the same way as quantum-mechanical eigenstates. Using the example of Stern-Gerlach measurements of spin states, the assumption is readily falsified. It is shown instead that the important effect, peculiar to quantum systems, is that eigenvalues of conjugate variables cannot be measured simultaneously and therefore are not additive. The uniqueness proof of the orthodox interpretation therefore falls away. [Pg.93]

It is also possible to generate microcapsules through interfacial polymerization using only one monomer to form the shell. In this class of encapsulations, polymerization must be performed with a surface-active catalyst, a temperature increase, or some other surface chemistry. Herbert Scher of Zeneca Ag Products (formerly Stauffer Chemical Company) developed an excellent example of the latter class of shell formation (Scher 1981 Scher et al. 1998). He used monomers featuring isocyanate groups, like poly(methylene)-poly(phenylisocyanate) (PMPPI), where the isocyanate reacts with water to reveal a free primary amine. Dissolved in the oil-dispersed phase of an oil-in-water emulsion, this monomer contacts water only at the phase boundary. The primary amine can then react with isocyanates to form a polyurea shell. Scher used this technique to encapsulate pesticides, which in their free state would be too volatile or toxic, and to control the rate of pesticide release. [Pg.183]

Formation of free milk fat in DWM powder particles as a result of atomization and drying may also contribute significantly to poor solubility and dispersibility. Free milk fat, which is extractable from the powder by a 50 50 mixture (v/v) of ethyl and petroleum ether (Brunner, 1974), probably coats the powder particles and prevents their rehydration. The physical state of the milk fat, as controlled by the liquid-to-solid ratio and the presence of free milk fat on the particle surface, strongly influences DWM particle dispersibility. Spray coating of DWM particles with lecithin or other surfactants and dispersion in warm water improve their dispersibility. [Pg.762]

The notions of chemistry and quantum theory are in a state of conflict. Indeed, it must be said that quantum mechanics and traditional chemistry contradict each other at a very fundamental level. Whereas traditional chemistry claims that each nucleus in a molecule is located at some particular (possibly fluctuating) position in space, quantum mechanics asserts that nuclei within a molecule need not have a dispersion-free position at all. [Pg.91]

Given a system having fixed numbers of particles (dispersion-free or not) and fixed parameters, the projection of property space on the E-S plane has the shape of the cross-hatched area shown In Figure 1. Each point In this area represents a large number of states having the same values E and S, except for points along the curve EgAgAg, each of which represents one and only one state. [Pg.267]

The state of fat in powder has a major influence on wettability, i.e. the ease with which the powder particles make contact with water. Adequate wettability is a prerequisite for good dispersibility. Free fat has a water-repelling effect on the particles during dissolution, making the powder difficult to reconstitute. Clumps of fat and oily patches appear on the surface of the reconstituted powder, as well as greasy films on the walls of containers. The presence of free fat on the surface of the particles tends to increase the susceptibility of fat to oxidation. A scum of fat-protein complexes may appear on the surface of reconstituted milk the propensity to scum formation is increased by high storage temperatures. [Pg.127]

The dots and squares in Fig. 3 correspond to peaks attributed to ESR from the Pj and P3/2 states, respectively. Asterisks correspond to TPS to the P3/2 state witn strong resonance enhancement for wl close to the Di line. The two TPS data points at 16,975 cm actually correspond to strong emission peaks with an asymmetric broadening toward low frequencies and as yet unexplained structure. The crosses correspond to TPS to the Pjj state with resonance enhancement for ojl close to the D2 line. The laser-frequency-independent TPS at -16,966 cm , close to the Na dispersion-free point, is clearly apparent. The observation of the various components of the spectra in different branches is an indication of the relative populations of the levels as a function of laser frequency as well as the importance of resonance enhancement of the TPS process. [Pg.329]

In fig. 91 we show a dispersion of a semiconducting TmSei Te t with a small energy gap at ambient pressure so that there is already appreciable f-d hybridization. Then the originally dispersion free 4f state acquires a certain width and Jansen et al. (1985) have shown that the narrow 4f band has its maximum at the T point. The conduction band has... [Pg.285]

The specificity and stability of a lipase will be dictated primarily by its microenvironmental conditions temperature, pH, ionic strength, water content, dispersing solvent, presence of inhibitors or promoters, and whether the lipase is in the free state or immobilized. Here we discuss the paramount roles of water content and solvent in detail. [Pg.485]

The strategy used to disperse the nanoclay into the pre-blended PVC was as follows The pre-blended PVC was placed into the mixer and the mixing process was started to follow the fusion curve. Nano particles were added into the mixer at the onset of the fusion, i.e., the point where the material reached a void-free state and starts to melt. At this point, the PVC primary particles are reduced from micron in size to submicroparticles (approximately 10-30 nm in diameter) (9,t0), allowing a much better dispersion of nanoclay to PVC matrix. After nanoclay addition, the materials remained in the mixer until equilibrium torque was reached. [Pg.2927]


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See also in sourсe #XX -- [ Pg.92 ]




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Free states

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