Denshi kenbikyo
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Volume 4, Issue 3
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1956 Volume 4 Issue 3 Pages 121-128
    Published: March 10, 1956
    Released on J-STAGE: March 05, 2010
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.121
    JOURNAL FREE ACCESS
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  • Electron Microscopic Studies on Yoshida Sarcoma Cells by Ultra-thin Sectoning
    Shoichi HORII
    1956 Volume 4 Issue 3 Pages 129-133
    Published: March 10, 1956
    Released on J-STAGE: December 09, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.129
    JOURNAL FREE ACCESS
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    Normal Yoshida sarcoma cells, the cells agglutinated and cytolysed by the respective immune reaction were examined with the electron microscope by ultra-thin sectioning.
    The results obtained may be summarized as follows :
    Cytoplasm of the normal cells processing several filaments were filled up with mitochondria, azur granules and the other smaller granules.
    Nothing could be found in the nucleus except nucleoli and fine granules.
    Golgi's sphere occupied with veiled and rather denser area which contained several granules distinguished from mitochondria was noticed.
    Cytoplasm and nuclei of agglutinated sarcoma cells were remarkably vesiculated.
    Sarcoma cells after cytolysis became more and more vesiculated and degenerated just like the cells treated with- Colchicin, Papaverin, Hydrgen peroxide and etc.
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  • Fine Structure of Mitochondria in Paramecium
    Mitsuo TSUJITA, Seizo TSUDA, Kyozo WATANABE
    1956 Volume 4 Issue 3 Pages 133-137
    Published: March 10, 1956
    Released on J-STAGE: December 09, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.133
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    The present paper deals with the results of an electron-microscopical study on the fine structure of mitochondria in Paramecium carried out by means of ultra-thin sections.
    The mitochondria lying under the pellicle and those scattered in the cytoplasm show the same inner structure. Each mitochondrion is surrounded by an outer membrane. In addition a membranous fold-or plica-structure can be seen in the interior of mitochondria. Their internal plica-structure has not always the same appearance ; it is sometimes indistinct or it exhibits a net-like structure. Judging from our observations on many thin sedtions of mitochondria in Paramecium, their internal structure seems to vary according to the phase of their physiological function.
    It is assumed that mitochondria in the ectoplasm have some relation to the formation of trichocysts ; they may be also related to the energy source for ciliary movement. Further studies, however, are required in this respect.
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  • Unusual Forms of Leptospira Icterohaemorrhagiae in Aging Cultures
    Zensaku YOSHII, Eiichi ONO
    1956 Volume 4 Issue 3 Pages 137-141
    Published: March 10, 1956
    Released on J-STAGE: December 09, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.137
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    Various unusual forms of Leptospira icterohaemorrhagiae in aging cultures have been observed by the electron microscope and assorted into three types (whirl, granular, and irregular types).
    The recognization of intermediate forms between usual and these unusual forms, and the results of the cultivation test intimated the presence of the deformation process of Le icterohaemorrhagiae as described in Fig. 5.
    Although the significance of unusual forms was far from clear, these observations suggested that each of the whirl, granular and irregular types was a group of resting stage cells, reproductive bodies, and crumbled cells respectively.
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  • Electron Microscopic Studies on the Hepatoma induced by D.A.B. (Dimethylaminoazobenzene) in Rats
    Masayoshi HASHIMOTO, Yusuke FUSE, Kozo MUROYA
    1956 Volume 4 Issue 3 Pages 141-145
    Published: March 10, 1956
    Released on J-STAGE: December 09, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.141
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    Sections of hepatoma induced by feeding Dimethylaminoazobenzene were studied with the electron microscope and following results were obtained.
    (1) Nuclei of the tumor cells were much larger than .normal liver cells, showing irregular nuclear membranes and large nucleoli with a dense convoluted structure.
    (2) "Intracellular cytoplasmic membrane" (Sjostrand) were scanty. and irregular in the tumor cells.
    (3) Mitochondria were decreased in their number and size., compared to those in normal liver cells, and aggregated around the indented area of the nuclear membrane, where a remarkable increase in number of the cytoplasmic granules was observed.
    (4) Cell membranes of almost all the tumor cells appeared irregular.
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  • Fine Structure of Plasma Cell as Revealed by Electron Microscope
    Yonosuke WATANABE, Michio TAKAMATSU, R. OSAKO
    1956 Volume 4 Issue 3 Pages 146-151
    Published: March 10, 1956
    Released on J-STAGE: June 12, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.146
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    The fine structure of plasma cells was studied with electron microscope in biopsy specimens of pseudoerosions of human portio vaginalis and of carcinoma metastase in lymph node.
    The findings are summarized as follows:
    1. Plasma cells are characterized by the presence of a large number of intracytop lasmic sacs. The sacs are present in basophilic portion of cytoplasm. They reveal the same features as those in pancreatic exocrine cells etc.
    2. Golgi area is composed of three elements : Golgi granules, Golgi vacuoles and Golgi membranes. Characteristic dark round granules are found at the periphery of Golgi areas. These granules are thought to be transformed from Golgi granules.
    3. The structure which presumablly represent central body is demon-strated in Golgi areas.
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  • Fine Structure of Renal Glomerulus
    Hiroshi SAKAGUCHI, Yasunosuke SUZUKI
    1956 Volume 4 Issue 3 Pages 152-156
    Published: March 10, 1956
    Released on J-STAGE: December 09, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.152
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    Normal glcmerulus was studied with electron microscope by means of ultra-thin sectioning. This experiment was performed with the kidney of dog.
    The findings obtained may be summarized as follow:
    1. There is no basement membrane between the mesangium and the capillary lumina.
    2. The three dimentional structure of the process-like structure was discussed.
    3. The endothelial layer might have the interruption in physiological condition.
    4. Nomenclature of the fine structure of the normal glomerulus was given.
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  • Dehydration and Decomposition of the Hydration Products of Portland Cement during Electronmicroscopic Observation
    Kosaburo WATANABE, Tadashi IWAI
    1956 Volume 4 Issue 3 Pages 157-161
    Published: March 10, 1956
    Released on J-STAGE: March 05, 2010
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.157
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    Several cases of the dehydration and decomposition of cement hydration products, which occured during electronmicroscopic observation, have been discussed.
    1.Ca(OH)2 and CaCO3 change to CaO without remarkable deformation of electronmicroscopic figures.
    2.CaSO4⋅2H2O is dehydrated to CaSO4⋅ 1/2H2O and then CaSO4⋅CaSO4 is decomposed by stronger irradiation of electrons, and rings corresponding to those of CaS and CaO appear in electron diffraction patterns.
    3.By the dehydration of hexagonal plates of calciumaluminate and ferrite hydrates, the internal structures disintegrate to amorphous state without appreciable change of their external shapes, and a metastable intermediate state is conceived from the change of electron diffraction patterns.
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  • Electron Microscope Study on the Surface Structure of Latex Coated Water-Proof Papers
    Seiji WAKANO, Shigeyoshi MIURA, Shigeo TAKEUCHI
    1956 Volume 4 Issue 3 Pages 162-165
    Published: March 10, 1956
    Released on J-STAGE: June 12, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.162
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    Evaporated aluminium replicas of the surfaces of the water-proof papers coated by a synthetic latex, which was made by copolymerizing vinyliden chloride and the others, were shown. The slight declination of the brightness of the coated surface caused by the multiple coating by this latex is due to the wave-like structure which arised, from this multiple coating. This surface structure will be mainly due to the hydrophobility of the previously coated surface.
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  • On the Vacuum Vaporization Technique of Carbon and the Characteristics of Evaporated Carbon Film and its Applications
    Akira FUKAMI, Haruo YOTSUMOTO
    1956 Volume 4 Issue 3 Pages 166-173
    Published: March 10, 1956
    Released on J-STAGE: June 12, 2009
    DOIhttps://doi.org/10.11410/kenbikyo1950.4.166
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    A carbon film obtained by the vacuum vaporization has many apllication to the preparations of the specimens in electron microscopy.
    In this paper conditions to obtain the fine film are described. The shape and the material of the carbon electrode, the contact pressure between two opposite electrodes etc. were determined and further the procedures to use the carbon film for replica, shadowing and reinforcing material were examined.
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