Transition electron micrographs

Figure 3. Inset Transition electron micrograph (TEM) of FC-4 particles after ultrasonic treatment, x 8 000. Normalized distribution of particles by the area of their cross-section.

Figure 4. Transition electron micrograph (TEM) of FC-4 particles. (A)Stmcture of FC-4 particles, x 76 000, bar 0.1 pm. (B) Adsorbent particles with carbon filaments, (B)x 91 000, bar 0.1 pm. (C) Structure of a carbon filament, x 700 000, bar 0.01 pm.

Fig. 9 Left Transition electron micrograph of lipid-lysine dendron vesicles with a 6-10 nm thick membrane. Right Illustration of the structure of the bilayered membrane. Reprinted with permission from [41], copyright (2003) Elsevier Science...

Dynamic tight scattering [236] of fractions 3 and 2 allowed estimation of the diameter of the nanosponges as 17 nm and that of the clusters as 34 nm. Indeed, transition electron micrographs reveal the spherical shape and a distinct size difference of the two types of dry species, approximately 15-20 nm and up to 40-50 nm, respectively [236, 238]. 

Since a considerable amount of review articles on both theoretical frameworks and calculated results have been reported[15-25], the main objective of the present study is placed on the comparisons with experimental results. The organization of the present report is as follows In the next section, for the sake of completeness, a brief theoretical description of the PPM is summarized from the previous articles. In the third section, disorder-LIq transition is focused and visualized atomic (spin) configuration is compared with recent high resolution electron micrograph. In the fourth section, ordering relaxation... 

We measured the dispersion of Pt (impregnated from a chloroplatinic acid precursor, calcined at 450 C and reduced at 500 C) on a series of Nd203-loaded silica-aluminas (Fig. 8). We find, unexpectedly, that dispersion increases with increasing rare earth oxide loading up to about 18% Nd203, where it plateaus at between 40 and 50%, compared to 10% with unmodified Si-Al. This compares with dispersions of -60-80% measured on similarly Pt-loaded transitional AI2O3 catalysts. Transmission electron micrographs confirmed the decrease in particle size with rare earth content on Si-Al. 

The collage of electron micrographs shown in Figure 19 Illustrates a probable transition from a nucleation and growth phase separation mechanism to a spinodal decomposition. The 7% PS sample shows more or less spherical PS domains, characteristics of nucleation and growth. However, a few domains appear to have some elliptical characteristics. When the PS content increases up to midrange, the shape of the PS domains becomes more obviously elliptical, suggestive of cross-sections of cylinders or other worm-like structures. As the PS content increases further, the... 

Figure 10.7 shows that the tensile strength is improved as polystyrene is incorporated. Data for conventional melt-blended samples (Fayt et al., 1989) are provided for comparison. We note that the ductile-to-brittle transition for our system is shifted toward much higher polystyrene content. Fayt and others have shown that conventionally prepared polyethylene/ polystyrene blends are relatively poor materials (Barentsen and Heikens, 1973 Wycisk et al., 1990). Blends of most compositions are weaker than polystyrene or polyethylene homopolymers because of the poor interfacial adhesion between the two immiscible polymers. The electron micrographs and the mechanical data for the blends described here indicate that poly-... 

Electron micrographs of compositions D and E are shown in Figures 9 and 10. It is evident that in E polybutadiene is the continuous phase (with some rubber in the polystyrene domains) while D represents a transition from lamellar to polybutadiene-continuous morphology. Again the dynamic mechanical data (Table II) are consistent with these obser-... 

Figure 10. Representative freeze-fracture electron micrograph of competent E. coli DH1. The micrograph shows the typical appearance of small semi-regular plaques (arrows) in the plasma membranes of E. coli DH1 cells after treatment to make them genetically transformable by the method of Hanahan.146 These cells have sharp thermotropic transitions at -56 °C when examined as in Figure 9A.24...

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