Quasars Associated with NGC 613, NGC 936 and NGC 941

The association of low redshift, active galaxies with high redshift quasars is here tested in two regions uniformly surveyed for quasars to faint limits. Three active galaxies in these regions all show significant association with nearby quasars. Radio, optical and X-ray data available for these galaxies give new information on the processes which accompany the proposed ejection of the quasars. It is concluded that the quasars are originally relatively compact compared to the galactic medium through which they exit but can be slowed. It is argued that effects of ejection can be seen on the galaxies and may be connected with spiral structure. Evidence for periodicity of the redshifts is discussed.     

NIST SRM 610, 611 and SRM 612, 613 Multi-Element Glasses: Constraints from Element Abundance Ratios Measured by Microprobe Techniques

The SRM 600 series of glasses, SRM 611 to SRM 619, which nominally contain 500 (SRM 610, 611), 50 (SRM 612, 613), 1 (SRM 614, 615) and 0.02 (SRM 616, 617) μg g⁻¹ of sixty one elements are now being extensively used as microprobe standards. Recent compilations of the trace element concentrations, which include many new multi-element bulk analyses, do not all give the same value within the stated uncertainty; this observation appears to raise questions about the degree of homogeneity on a microscale reported from probe measurements. The ion microprobe cannot give absolute concentrations, but can accurately measure the abundance ratios between glasses of similar major element chemistry. Recent and new probe measurements show that, although the absolute concentrations are significantly lower than the nominal values, the average dilution factors are 12 : 1 : 0.02 : 0.0004 and close to weighed amounts. The consistency between the ratios of random samples of glasses (SRM 610/SRM 612 and SRM 611/SRM 613) strongly supports a high degree of homogeneity on all scales. The measured abundance ratios between two glasses can, therefore, act as a useful check on bulk measurement accuracy. A clear correlation in the SRM 610, 611/SRM 612, 613 ratios measured by ion probe and SRM 612 trace concentrations measured by bulk techniques demonstrates that SRM 610, 611 has a much more uniform trace content than SRM 612, 613.