Chushiro Hayashi 1920-2010

Stability of Toomre-Hayashi Disk

We investigate stability of Toomre-Hayashi model for a self-gravitating, rotating gas disk. The rotation velocity, vφ, and sound speed, cs, are spatially constant in the model. We show that the model is unstable against an axisymmetric perturbation irrespectively of the values of vφ and cs. When the ratio, vφ/cs, is large, the model disk is geometrically thin and unstable against an axisymmetri...

Nationwide tobacco surveys and sales data in Denmark from 1920 to 2010.

INTRODUCTION Tobacco smoking is an important cause of premature death and morbidity in Denmark. It is therefore important to monitor tobacco consumption. In this paper, tobacco consumption in Denmark is illustrated by two methods: sale of tobacco products and smoking habit surveys. MATERIAL AND METHODS Data on sale of tobacco products in Denmark were available for the 1920-2010-period. Nation...

Homer F. Swift, 1920

Tokishi Serotonin and Tryptamine HAYASHI * and

ing L-tryptophan-3,3-d2 and as tracer fbr the investigation of detail in vivo metabolism of Tryptophan (Trp), 5-HT, Tryptamine (TA) (9). It was also reproted that comparable amounts of 5-HT-d2 and TA-d2 to those of endogenous ones were excreted into urine several hours after the administration of Trp-d2 (1O mg!kg), though measurble amounts of these componds were not fbund in blood during the sa...

François Jacob (1920–2013)

“Plus que jamais, la recherche me paraissait s’identifier à la nature humaine. En exprimer l’appétit, le désir de vivre. C’était bien le meilleur moyen trouvé par l’homme de braver le chaos de l’univers. De dominer la mort.” (More than ever, scientific research seemed to me to be intrinsic to human nature. It expressed the hunger, the desire to live. It has, in fact, been the best means found b...