Third morphological treatment

Third morphological treatment removal of artifacts (small objects less than 20 pixels in size)... 

In a second series of experiments, similar materials were prepared with I wt % catalyst to investigate the influence of morphology on the toughening. In addition to the two heat treatments to generate solvent-modified and macroporous epoxies as presented before, a third heat treatment was carried out to give a semi-porous morphology. A brief heating above Tg and under vacuum results in partial solvent removal. The differences in the three heat treatments is clearly revealed with density measurements as shown in Fig. 48. 

Synthesis of the third-generation catalyst is an intricate process. Two crucial steps are (1) Precipitation of the supported catalyst from a solution of Mg2+ ion in organic solvent by the addition of TiCl4. (2) Catalyst activation by heat treatment with TiCl4 and phthalate esters (third component). The precursors for the support could be magnesium alkoxides, carboxylates, sulhte, or sulfinates. They all give particles of different but well-defined morphologies. 

Third, perfusion defects could better be allocated to their specific culprit lesion, which is not possible with MPI alone. Accordingly, in the presence of hemody-namically relevant coronary artery stenoses, accurate treatment stratification could be provided. Particularly in patients with known CAD and a more complex coronary anatomy with intracoronary stents or bypass grafts, exact morphological information has shown to be very useful. 

As described below, the HAS-derived nitroxides in heterophasic polymer systems perform a triple role. First, they provide the contrast needed in the imaging experiments. Second, they enable the visualization of polymer morphology, based on the detection of two dynamically different components detected in the ESR spectra of the nitroxides in ABS, for example, the two sites, fast (F) and slow (S), have been assigned to location of nitroxides in butadiene-rich and styrene-acrylonitrile (SAN)-rich domains, respectively. Third, the spatial variation of the ESR spectra of nitroxides (in terms of intensity and line shapes) with treatment time, t, provides detailed information on the extent of degradation in the different miCTodomains. These experiments made possible the determination of the concentration profiles of the nitroxides from ID ESRl, and also of the spectral profiles from 2D spectral-spatial ESRI, both in a nondestructive way. In these studies the nitroxides, which are the contrast agents, are part of the systan therefore these studies represent the evolution of ESRl techniques beyond phantoms. 

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