Malignant lymphoma with cardiac and bone involvement in a dog

Malignant lymphoma involving bone and heart was diagnosed in a 4-year-old Whippet, using radiography, histologic examination, nuclear scintigraphy of the skeleton and heart, and cardiac ultrasonography.     

Electron microprobe and neutron activation analysis for the determination of elemental distribution in hollow heart potato tubers

Electron microprobe and neutron activation analysis were used to evaluate the distribution of elements within potato tubers having the physiological disorder hollow heart. Both methods of analysis correlated well for all elements tested. In hollow heart tubers, there were significantly higher Ca⁺⁺ levels in the stem end than in the bud end; however, a Ca⁺⁺ gradient in the control was not evident. The stem to bud end ratios for Ca⁺⁺ were highest in the hollow heart tubers. A Cl^? gradient from stem to bud end was obvious in both the hollow heart and control tubers. In the control tubers, K⁺ was highest in the bud end and lowest in the stem end. There was no K⁺ gradient in hollow heart tubers, but in the area adjacent to the hollow it was higher than at both ends.     

Spatial variations of rainwash and runoff within apparently homogeneous areas

The magnitude and causes of rainwash and runoff variability within small and supposedly “homogeneous” areas were investigated. Artificial rainfall (at 50 mm hr⁻¹ for 30 minutes) was applied to twenty identical 0.0929 m² (1 ft²) mini-plots arranged within a wetted annular 16.5 m² in area. Despite the uniformity of techniques used for data collection, there was considerable variability in the rainwash and runoff data (coefficient of variation= 21 to 35% and 20 to 75% respectively) at the three locations in southern Ontario. In comparison with laboratory data, field rainwash variability was similar but field runoff variability was substantially higher. Soil strength parameters, surface roughness and microtopography, as well as aggregation indices, are considered to be the potential causes of the observed variabilities. Operator variance was found to be extremely significant in our study. It is suggested, therefore, that comparison of erosion data collected by different researchers must be conducted with great caution.     

Serologic correlation of suspected Leptospira interrogans serovar pomona-induced uveitis in a group of horses

After the observation of 2 horses with uveitis on a horse farm in the Minnesota River valley, 100 horses from this geographic area were given ophthalmologic examinations and were evaluated serologically for leptospirosis. A statistically significant (P less than 0.001) association was observed between the finding of antibodies against Leptospira interrogans serovar pomona and uveitis.     

Otto Appel

Ohne Zusammenfassung

---

Otto Appel