Änderungen der Entladungsfrequenzen des elektrischen Organs bei verschiedenen Verhaltensweisen eines Nilhechtes (Gnathonemus petersii)

Summary Observing the discharge-frequencies of the electrical organ ofGnathonemus petersii, it was found that there are characteristic frequencies in relation to different behaviour as: slow and fast swimming, at rest, at appetive and agressive behaviour. No such characteristic frequencies could be detected in relation to comfort movements.     

A simple accurate method for determining the activity of proteolytic enzymes

Riassunto Nel presente lavoro é descritta una semplice e rapida metodica, eseguita con i convenzionali metodi manometrici, per dosare l'attività proteolitica di enzimi.     

Structure-activity relationship of various acyl derivatives of 6-methyl-8β-aminomethyl-10α-ergoline (dihydrolysergamine)

Riassunto Alcuni acil derivati dell'ergoline hanno dimostrato notevoli proprietà ossitociche, adrenolitiche ed anti-5-idrossitriptaminiche, (anti-5-HT). In particolare l'acetil e l'isobutirril diidrolisergamina possiedono una azione ossitocica altrettanto potente e più elettiva dell'ergometrina, della quale sono anche meno tossiche.     

Die Hemmbarkeit der inhibitorischen Adrenalinbzw. Noradrenalinwirkung durch Adrenolytika

Summary Dibenamine, dihydroergotamine, regitin and priscol were found to antagonize specifically the inhibitory action of adrenaline and noradrenaline on the electrically stimulated isolated ileum of the guinea-pig. The antagonistic action of dibenamine was irreversible.     

Das Coenzym A in leukämischem Blut

Riassunto Il Coenzima A nel sangue di soggetti leucemici, in particolare con leucemia mieloide, appare nettamente aumentato in confronto al sangue normale.Il Coenzima A è contenuto in prevalenza nei leucociti e probabilmente anche nelle piastrine, mentre è scarso nel plasma e nei globuli rossi.     

Physiological studies on the effects of nutritional imbalance on the central nervous system. II. Effects of thiamine deficiency on oxidative enzymes in the brain of chicken,Gallus domesticus

Summary The activity levels of succinate dehydrogenase, glutamate dehydrogenase and pyruvate dehydrogenase in the fore, mid and hind brain regions of the thiamine deficient chicken,Gallus domesticus were determined. The activity levels of scccinate dehydrogenase and glutamate dehydrogenase in all the 3 regions of brain showed augmentation on inducing thiamine deficiency. In contrast the activity levels of pyruvate dehydrogenase decreased in the brain of thiamine deficient animals. It is suggested that these changes in the oxidative enzymes indicate disturbance caused in the operation of the tricarboxylic acid cycle in thiamine deficiency.