Mechanisms of sympathetic regulation of arterial smooth muscle

Zusammenfassung Der Wirkungsbereich der Querschnittsregulation der A. dorsalis pedis durch den Sympathikus bei Hunden wurde erfasst und die Relation Reizerfolg-Reizfrequenz durch eine Hyperbel charakterisiert. Mittels Fluoreszenzmethode gewonnene Befunde weisen darauf hin, dass die durch Sympathikusreizung freigesetzen Monoamine zu den nervenfreien Mediaschichten diffundieren.

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For the supply of Nialamide we are indebted to Pfizer Corporation, Eastern Europe Division.     

Esbozo de una logica interna en la obra arquimediana

Presentado por B. L. van der Waerden     

The problem of coincidences

Summary This paper deals with the origin, history and various appearances of the problem of coincidences (matches, rencontres) in the theory of probability.     

Altered adrenergic responses of the coronary arterial bed in alloxan-diabetic dogs

Summary The conductivity of the coronary arterial bed increased in healthy and decreased in alloxan-diabetic dogs in response to intracoronary administration of norepinephrine or sympathetic stimulation. This suggests a modification of adrenergic receptors sensitivity in diabetes.     

A rapid method of following the spontaneous regression of experimental leukemias

Summary Transplantation of virus and chemically induced leukemias from C3H/He-mgxAKR/F₁ hybrid mice into C3H/He-mg males induced leukemias in the latter, which was followed by a spontaneous regression of the disease within a few days. The regression of leukemia could easily be followed by measuring the changes in the pyruvate kinase activity of para-aortic lymph node cells.     

Isoenzyme der alkalischen Phosphatase-Referenzwerte im jugendlichen Alter und Einfluss der Eiweissernährung

Summary In 260 normal students, 20–25 years old, the variation in the activities of serum alkaline phosphatase and its isoenzymes with sex, ABO blood groups, and protein intake were studied. The values are on the whole higher in males than in females. The activity of the intestinal isoenzyme was higher in subjects taking protein-rich diet than in those taking protein poor diet.     

Study of neurosecretory cells ofHelix pomatia by intracellular dye injection

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