Effects on prostaglandins F2α, I2, and indomethacin on isolated coronary arteries from healthy and alloxandiabetic dogs

Summary Contractile responses of isolated coronary arteries from healthy and alloxan-diabetic dogs to prostaglandin F₂ were enhanced by indomethacin and inhibited by prostaglandin I₂. The potentiation by indomethacin was more prominent in diabetic vessels than in normal arteries.     

Prolongation of skin homograft survival by local intralymphatic radioisotope injections

Zusammenfassung Injektion von¹³¹I-Lipiodol oder¹¹¹Ag-Kolloid beim Kaninchen in ein Ohrlymphgefäss verzögert die Abstossung eines Hautlappen-Hormotransplantes am Ohre wesentlich. Bei der Untersuchung der Verteilung intralymphatisch verabreichter Radioisotopen in den einzelnen Geweben wurde festgestellt, dass etwa 50% des¹¹¹Ag-Kolloids, aber unter 10% des¹³¹I-Lipiodols von den regionären Lymphknoten aufgenommen wird und dass Lipiodol hauptsächlich im Lungengewebe, Ag-Kolloid in der Leber gespeichert wird.     

Localization of sound producing animals using the arrival time differences of their signals at an array of microphones

Summary This method provides a reliable means to determine distance between vocalizing individuals and their locations through a prolonged period of time without disturbance to the communication process by the presence of an observer. The accuracy of this method was tested by varying the arrival time differences on the microphone grid for known locations in a random fashion. This test shows that a vocalizing animal within an area of 4 ha surrounding the microphone array can be localized with an accuracy of ±1 m. The accuracy decreases with the distance from the central area and as a function of the geometry of the array. The location of an individual can be determined based on 5 vocalizations given in sequence.Acknowledgment. This research was supported by funds granted to Irene Magyar from the Chapman Fund, The American Museum of Natural History and Sigma Xi, Grants in Aid of Research.