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Volume 50 (1973 - 197･･･
- Issue 6 Pages 345-
- Issue 5 Pages 273-
- Issue 4 Pages 207-
- Issue 2-3 Pages 91-
- Issue 1 Pages 1-
Predecessor
Volume 50, Issue 1
Displaying 1-5 of 5 articles from this issue
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Helmut F. Sinzinger, Helga Unterberger, Johann J.Hohenecker, Walter E. ...1973 Volume 50 Issue 1 Pages 1-8
Published: May 25, 1973
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSWe prpared the branches o f the celiac trunc of 30 Syric golden hamsters using a microscope outfitted for preparations. Especially we paid attention for the nutrition of the liver arteries. W e connected the variations on several pictures and we discussed their importance on the base of comparing anatomy.View full abstractDownload PDF (1151K) -
Hideo Isono, Shizuko Shoumura-Sakurai1973 Volume 50 Issue 1 Pages 9-25
Published: May 25, 1973
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe newt parathyroid gland in the end of May (control) and under suppressed circumstances induced by the intraperitoneal injection of parathormone was examined with electron microscopy. The average numbers of large homogeneously dense bodies (secretory granules), large heterogeneously dense bodies, large vacuolar bodies and lipofuscin-like bodies were counted per 100 μ2 of the cytoplasm from the electron micrographs of the parathyroid glands of the parathormone treated newts and control ones. The serum calcium levels of all the newts were determined. Serum calcium concentration was increased after 1 day of injection of parathormone 20 U. S. P. parathyroid units, arriving at the highest value after 2 days of injection of parathormone 40 units and regained the almost normal value after 4 days of injection of parathormone 80 units. The parenchymal cells were classified into basal cells and suprabasal cells. In the former parathormone administration caused no marked changes. In the latter after experiment, glycogen granules seemed to be increased in number, while mitochondria, endoplasmic reticula, the Golgi apparatus and small dense granules appeared decreased in number when compared with control newts. Secretory granules and lipofuscin-like bodies were gradually decreased in number during the experimental stages. On the contrary, large heterogeneously dense bodies subdivided into a lysosomal type and ves icular type, and large vacuolar bodies were increased in number as c ompared with control newts. After parathormone administration the lysosomal type heterogeneously dense bodies were more dominant than the vesicular type. It is c onceivable that under a hypofunctional condition of the suprabasal cell caused by the high serum calcium concentration after parathormone administration most of secretory granules are tra nsformed into the vacuolar bodies through the lysosomal type he terogeneously dense bodies or some of them through the vesicular type.View full abstractDownload PDF (3048K) -
Kazuhiko Shoumura1973 Volume 50 Issue 1 Pages 27-47
Published: May 25, 1973
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSCortical projections of t h e dorsal lateral geniculate nucleus (LGNd) and several other related thalamic nuclei, posterior nucleus (PN) and posterior lateral nucleus (LP) of cats were studied using the Nauta impregnation method. LGNd is not a unitary structure but a complex of nuclei consisting of two major structural elements, main laminae (A, Al and B) and interlaminar nuclei (NIC and NIM). Main laminae project mainly to area 17, while interlaminar nuclei are linked primarily to area 18, and thus the geniculo-cortical system is organized in a dual manner. LGNd also projects to the banks of the middle and posterior suprasylvian sulci in a topographically organized manner. PN projects to both areas 18 and 19, and LP s ends fibers to the banks of the middle and posterior suprasylvian sulci. Thus, this region of cerebral cortex receives projections from both LGNd and LP.View full abstractDownload PDF (4268K) -
Jang-Kuei Wei, Toshio Suzuki1973 Volume 50 Issue 1 Pages 49-59
Published: May 25, 1973
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSDownload PDF (1547K) -
Kenji Suzuki1973 Volume 50 Issue 1 Pages 61-81
Published: May 25, 1973
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSUltrastructure of the human trophoblast in tissue culture has been studied by using newly developed technique for electron microscopic observation of the cells in explant culture. 1) The result of the new method is satisfactory in morphological preservation of cultured cell, especially in the observation of intercellular attachment. 2) The epithelioid cells reveal definite existence of desmosome in intercellular junction, which is very suggestive of epithelial origin of the cells. 3) The predominant cells in outgrowth reveal specific ultrastructures which do not demonstrate the similarities to the human placenta and the significant development of subcellular organelles, required for production and transport of protein. 4) Occasionally, the cells with the similar morphology to trophoblasts in the human placenta are identified.5) No transitional structures w hich show the process of maturation from cytotrophoblast to syncytiotrophoblast are observed under the condition of explant culture.View full abstractDownload PDF (10519K)
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