Bands striations

The striation of the muscle fibers is characteristic of skeletal muscle. It results from the regular arrangement of molecules of differing density. The repeating contractile units, the sarcomeres, are bounded by Z lines from which thin filaments of F-actin (see p. 204) extend on each side. In the A bands, there are also thick parallel filaments of myosin. The H bands in the middle of the A bands only contain myosin, while only actin is found on each size of the Z lines. 

Fig. 2 Fracture surface of compacted dispersion PTFE. The treatment was similar to that in Fig. 1. The arrow indicates a region where a striation terminates at the edges of a band, suggesting the striations are edges of lamellae. (Reprinted from Ref. [1] with permission from Wiley-Interscience)...

Individual bands were also seen on the free surfaces of both granular and dispersion bulk samples irregular continuous striations were present parallel, rather than normal, to the long axes of the bands (Fig. 6). Bands with well-... 

Figure 28a and b contains micrographs of two samples of Ausimont nanoemulsion held at 380 °C for 20 and 30 min, respectively, before slow cooling in the press. In Fig. 28a the ends of large, well-developed bands are seen, each with numerous double striations each has a total width of approximately... 

---