Opposite effect of PGE2 on cAMP levels in human adrenal medulla and pheochromocytoma

Summary PGE₂ (10^–7 M) caused increased cAMP accumulation in 5 pheochromocytomas, while in 3 human adrenal medullae PGE₂ caused a significant decrease of cAMP level on incubating slices in vitro. This finding is discussed in relation to the opposite effect of PGE₂ on catecholamine release from human medulla and pheochromocytoma slices in vitro.Acknowledgment. This paper is part of a Ph. D. thesis of Punya Boonyaviroj.Established Investigator of the Chief Scientist's Bureau, Israeli Ministry of Health.     

Influence of the caudate nucleus on hippocampal afterdischarges in the rabbit

Résumé La stimulation du noyau caudé augmente et prolonge la postdécharge hippocampale chez le lapin.     

An extrarenal effect of hydrochlorothiazide

Résumé L'hydrochlorothiazide diminue la consommation d'eau chez des rats néphrectomisés normalement alimentés ou bien ayant reçu par injection du sel hypertonique.     

The antidipsic effect of sulphonamides implanted in the hypothalamus of rats

Résumé Divers sulfonamides, implantés dans l'hypothalamus des rats, diminuent la consommation spontanée d'eau ainsi que la réponse à une injection hypertonique. L'activité antidipsique des sulfonamides n'a aucun rapport avec leurs autres propriétés pharmacologiques.

---

---

This research forms part of a Ph.D. thesis, submitted byA. Zerachia to the Faculty of Medicine of the Hebrew University of Jerusalem.     

<Emphasis Type="Italic">The Mathematical Intelligencer</Emphasis> Flunks the Olympics

The Mathematical Intelligencer recently published a note by Y. Sergeyev that challenges both mathematics and intelligence. We examine Sergeyev’s claims concerning his purported Infinity computer. We compare his grossone system with the classical Levi-Civita fields and with the hyperreal framework of A. Robinson, and analyze the related algorithmic issues inevitably arising in any genuine computer implementation. We show that Sergeyev’s grossone system is unnecessary and vague, and that whatever consistent subsystem could be salvaged is subsumed entirely within a stronger and clearer system (IST). Lou Kauffman, who published an article on a grossone, places it squarely outside the historical panorama of ideas dealing with infinity and infinitesimals.     

Opposite effect of PGE2 on cAMP levels in human adrenal medulla and pheochromocytoma.

PGE2 (10(-7) M) caused increased cAMP accumlation in 5 pheochromocytomas, while in 3 human adrenal medullae PGE2 caused a significant decrease of cAMP level on incubating slices in vitro. This finding is discussed in relation to the opposite effect of PGE2 on catecholamine release from human medulla and pheochromocytoma slices in vitro.     

苯型烃的化学性质和开库勒结构计数

这是一篇关于苯型烃开库勒结构计数的物理化学意义及其计算方面的评论。