A new approach to the theory of elementary domains

It is shown that Yukawa's theory of elementary domains can be formulated in a general framework. A quantized measure space structure of a space-time manifold is introduced so as to represent faithfully the elementary-domain structure. For a realization of elementary domains, an operator valued measure is defined such that it represents the spatiotemporal distribution of elementary domains. Effects of such a quantized topology are illustrated in the expressions ofS matrices.     

GENERATION OF SUPEROXIDE ANION WITH A PHOTOREDUCED PHENOXAZINE DERIVATIVE

Abstract. 1-Hydroxy-5-oxo-5H-pyrido [3,2 a ] phenoxazine-3-carboxylic acid was found to be reduced when it was irradiated with visible light in the presence of certain electron donors such as tetramethyl ethylenediamine and reduced glutathione. Upon illuminating this compound with either of the above electron donors under aerobic conditions, the coexisting nitroblue tetrazolium was reduced. The reduction was inhibited by superoxide dismutase, which indicated that superoxide anion was generated during the photoinduced reaction.     

Pressure effect on the resistance of InS

The effect of pressure on the resistance of InS was studied to pressure higher than to 150 kbar for single crystal and to ca. 300 kbar for powdered samples. The resistance exhibits a sharp maximum at 47 kbar, which is explainable by the change of band structure due to pressure increase. Under higher pressure, the resistance decreased gradually with increasing pressure. A marked change in slope, however, was observed at 108 kbar, suggesting a phase transition possibly to a metallic phase.     

Ultra-high-vacuum in situ electron microscopy of growth processes of epitaxial thin films

Extracts from recent results of ultra-high-vacuum in-situ electron microscopy of growth processes of epitaxial thin films are given. As a modified monolayer-by-monolayer mode, the growth process in Fe/(111)Au of the initial Frank-van der Merwe type, followed by the intrinsic γ → α transformation of Fe is mentioned. For the nucleation and growth mode, a systematic selection of epitaxial orientation according to interfacial lattice fitting, nucleation and coalescence features, the validity of Cabrera's suggestion extending Frank and van der Merwe's idea, the cluster mobility and effects of grown-in dislocations in substrate crystals are discussed on the basis of the observations.     

Auslander–Reiten Components Containing Cones

Let A be a locally finite Abelian R-category with Auslander–Reiten sequences and with Auslander–Reiten quiver (A). We give a criterion for Auslander–Reiten components to contain a cone and apply this result to various categories.