Search

It is demonstrated, by using the static-model crossing matrices, that the ..pi../sup -/ and rho-meson Regge trajectories can support each other. Exchange of the ..pi../sub j/ in the ..pi..rho/sub j+11 channel (subscripts indicate spin) generates the ..pi../sub j +2/; exchange of the rho/sub j +1/ in the ..pi pi../sub j+2// channel gives the rho/sub j+3/, etc. (AIP)

Analysis of electron diffraction patterns from rat hemoglobin taken at 200 kV on a wet stage yields intensity data to a resolution of 2-3 A which are as reproducible as those from typical X-ray diffraction. Some crystals were so similar that the differences in measured intensities were insignificant (R = 0.056), but in other cases real differences between crystals were observed (R = 0.33). Dynamic scattering was insignificant under our diffraction conditions; however, exposures to electron doses as low as 10(-2) e/A2 produced detectable changes in measured intensities. Limits to the reproducibility of the data are set by radiation damage and errors in microdensitometry.