Studies on the relationship between the function of reticuloendothelial system and the hematopoiesis. II. Experimental studies on 59Fe ferrokinetics in the induced hematological disorders of mice

The following conclusions were drawn from the ferrokinetic studies using 59Fe in mice, whose hematological disorders were induced by various treatments. 1. The ferrokinetics in the normal mice were studied. 2. Chloramphenicol (CP) administration in mice first induced ferrokinetics disturbances and then suppressed erythropoiesis. 3. Splenectomy induced hyper-erythropoiesis in the bone marrow, and CP administration after splenectomy suppressed this hyper-erythropoiesis. 4. Human gamma-globulin (H.G.G.) caused hypersplenism and a marked suppression of erythropoiesis in the bone marrow, and Chlorabulin administration suppresed erythropoiesis. Finally, the author has summarized the relationship of the RES function and hematopoiesis in mice as follows. 1. The spleen and liver reacted in the same manner with respect to the RES function to sequestrate 51Cr-labelled heat-damaged erythrocytes when hematological failures were induced. 2. The spleen and bone marrow reacted reversely with regard to the RES function. 3. When the RES function, especially that of the spleen was accentuated, the suppression of hematopoiesis was observed. 4. Chloramphenicol administration was followed by the suppressed hematopoiesis and the accentuated RES function. 5. Splenectomy accentuated the RES function in the bone marrow and liver, and also increased hematopoiesis in the bone marrow. 6. Human &#947;-globulin hypersensitization induced hyperfunction of the RES, especially of the spleen and suppression of the hematopoiesis.</p

Studies on the relationship between the function of reticuloendothelial system and the hematopoiesis. I. Experimental studies on the RES functions using 51Cr-labelled heat-damaged iso-erythrocytes in the induced hematological disorders of mice

The following conclusions were drawn from the above data concerning the RES function to sequestrate 51Cr-labelled heat-damaged iso-erythrocytes in mice. (l) When the hematological disorders of mice were induced, the RES of the liver and spleen reacted in the same manner. (2) The RES function of the bone marrow and liver were observed to react reversely except in the case of splenectomized mice. (3) Human gamma globulin hypersensitization and chloramphenicol administrations suppressed RES function of the bone marrow and augmented that of the liver and spleen. (4) The RES function of the bone marrow was activated after splenectomy. (5) The massive human gumma globulin administration was followed by the increased RES function of the bone marrow and by the suppressed one of the liver and spleen.</p

6d Dirac fermion on a rectangle; scrutinizing boundary conditions, mode functions and spectrum

We classify possible boundary conditions of a 6d Dirac fermion $\Psi$ on a rectangle under the requirement that the 4d Lorentz structure is maintained, and derive the profiles and spectrum of the zero modes and nonzero KK modes under the two specific boundary conditions, (i) 4d-chirality positive components being zero at the boundaries and (ii) 2d-chirality positive components being zero at the boundaries. In the case of (i), twofold degenerated chiral zero modes appear which are localized towards specific directions of the rectangle pointed by an angle parameter $\theta$. This leads to an implication for a new direction of pursuing the origin of three generations in the matter fields of the standard model, even though triple-degenerated zero modes are not realized in the six dimensions. The emergence of the angle parameter $\theta$ originates from a rotational symmetry in the degenerated chiral zero modes on the rectangle extra dimensions since they do not feel the boundaries. In the case of (ii), this rotational symmetry is promoted to the two-dimensional conformal symmetry though no chiral massless zero mode appears. We also discuss the correspondence between our model on a rectangle and orbifold models in some details.Comment: 26 pages, 2 tables (v1); 39 pages, 3 tables, accepted to Nuclear Physics B (v2

A Study of Fermi Surfaces of the α-Phase Cu-Ge and Cu-Si Alloys by Positron Annihilation(Physics)

Angular correlation measurements on the fcc solid solutions of Cu-Ge and Cu-Si alloys have been carried out on single crystals with four crystallographic orientations by a crossed-slit geometry. The results on both the alloys are nearly the same. The -neck radius and the -radius of the Fermi surfaces increase almost linearly with increasing electron concentration in accord with previous results on Cu-Al and Cu-Zn alloys. The Fermi surface does not touch the square faces of the Brillouin zone at the solubility limit. The results agree fairly well with a calculation based on the sinking-conduction band model

The Fermi Surfaces of Cu-Pd Alloys Studied by Positron Annihilation(Physics)

The Fermi surfaces of Cu-Pd alloys below 63% Pd are studied by means of the angular correlation of positron annihilation with crossed-and long-slit geometries. The (001)- and (110)-radii decrease with increasing palladium content up to 30% in agreement with a calculation based on the rigid band model. The (111) neck radius also decreases with increasing composition, and it is suggested that the Fermi surface detaches from the hexagonal face of the Brillouin zone around 20% Pd, but remains to bulge in this direction at higher compositions. No detectable change is found in the correlation curves of the ordered and disordered states at 15 and 19% Pd. The origin of stabilization of the long period ordered structure near Cu_3Pd is discussed in the light of the present results