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Volume 68 (1991 - 199･･･
- Issue 6 Pages 319-
- Issue 5 Pages 259-
- Issue 4 Pages 215-
- Issue 2-3 Pages 81-
- Issue 1 Pages 1-
Predecessor
Volume 68, Issue 4
Displaying 1-7 of 7 articles from this issue
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Harumichi SHINOHARA, Satoshi MORISAWA, Toshio NAKATANI, Osamu OHTANI1991 Volume 68 Issue 4 Pages 215-218
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe auricular length, auricular base length and auricular width were measured in 94 human fetuses with crownrump (CR) lengths ranging from 49 mm (approximately 11 weeks of gestational age) to 250 mm (approximately 31 weeks of gestational age). The three measurement values showed linear increases as the CR length increased, suggesting that they are useful parameters to indicate intrauterine growth. The measurement values also suggested that the mandibular and hyoid derivatives did not grow independently, but did grow with maintaining a certain relationship.View full abstractDownload PDF (1193K) -
Joji SEKINE, Kazuo SANO, Ryoji HIRONAKA, Tsugio INOKUCHI1991 Volume 68 Issue 4 Pages 219-223
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSTo detect S-phase cells in the decalcified paraffin-embedded temporomandibular joint (TMJ) tissues of the rat, bromodeoxyuridine (BrdUrd) immunohistochemistry was performed. Percardiac perfusion of 10% EDTA-2Na Tris buffer accelerated the decalcification. The use of the monoclonal antibody to BrdUrd enabled the visualization of the distribution of S-phase cells. This method is practical in studying cell kinetics and the specific proliferation mode of the TMJ.View full abstractDownload PDF (1750K) -
Hidekazu WAKURI1991 Volume 68 Issue 4 Pages 225-230
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSIn anatomy, the morphological features of organs are captured in a variety of ways, and this allows wide interpretations of the terminology for organs. However, the present terminology is considered to include terms that require re-evaluation for appropriate ranking of organs. Organs should be understood in a proper perspective of their anatomical hierarchy and architectural characteristics.
I consider that organs should be classified morphologically by the terminology of “organelle” on the cytological level, “sub-organ” on tthe histological level, “organ” on the macroscopic anatomical level, and “organ system”, which may also be expressed as “apparatus” or “organa”, on the level of systematic anatomy. I strongly demand that N. A. V. -N. H. (1983)acknowledge this hierarchial order and adopt the general term “organum”.View full abstractDownload PDF (1992K) -
Masatake IMAI, Taizo SHIBATA, Keiichi MORIGUCHI1991 Volume 68 Issue 4 Pages 231-233
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSWe demonstrated a large number of pepsinogen granules in the esophageal pseudostratified ciliated epithelium of the rock snake.
1. The snake esophagus is covered with a pseudostratified ciliated epithelium.
2. This epithelium develop mostly in the upper portion of the esophagus.
3. Long supranuclear portions of the same cells are strongly PAS-positive and contain pepsinogen granules. Those cells possess cilia.
4. The strongly PAS-positive cells and pepsinogen granules decrease or are lost in the middle and lower portions of the esophagus.
5. Glands are distributed in the lamina propria mucosae of the esophagus of the Japanese lizard and gecko. Those in humans and the bird are compound tubular glands and those of the Japanese lizard and gecko are bottle-shaped. The pepsinogen granules of these glands are secreted into the excretory ducts and then discharged into the esophageal lumen.
6. However, the same granules of the snake are contained in the supranuclear portion of the epithelium and are secreted directly into the esophageal lumen.7. The mode of pepsinogen granule secretion of the esophagus is most simple in the snake.View full abstractDownload PDF (1126K) -
Kohsuke CHIDA1991 Volume 68 Issue 4 Pages 235-241
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSDexamethasone (DEX) was administrated intraperitoneally to newborn rats at a dese level of 2 μg/g body weight/day for four days, starting 4 days after birth. After administration of DEX, large quantities of glycogen granules accumulated in the cytoplasm of hepatocytes and the activity level of gamma-glutamyl transpeptidase (γ-GTP )in liver homogenate inceased significantly, whereas that of alkaline phosphatase (ALP) exhibited no significant difference in comparison with the control greup. In the histochemical analysis, after adminiStrtation of DEX, a high level of activity of γ-GTP appeared along cell borders between adjacent hepatocytes in the peripheral portion of liver lobules. On the other hand, a low level of activity of ALP was seen along cell borders between adjacent hepatocytes in liver lobules. In the immunohistochemical analysis, no hepatocyte showing positive reactions to Alpha-fetoprotein (AFP) could be recognized after administration of DEX, and in livers of newborn rats receiving DEX, the number of hepatocytes which incorporated bromodeoxyuridine (BUdR) decreased. The present study showed in newborn rat that DEX induced the differentiation of hepatocytes and regulated the expression of carcino-embryonic proteins.View full abstractDownload PDF (3091K) -
K. H. SIT, B. H. BAY, K. P. WONG1991 Volume 68 Issue 4 Pages 243-249
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSNa+/H+ antiporter activation by incubation in bicarbonate buffered saline induces long flat anchored human lung fibroblasts in monolayer culture to retract their cytoplasmic processes and become eventually globular in form. Reduction of cell profile area and perimeter in antiporter mediated rounding (AMR) is quantitated by microspectrophotometry and the roundness form factor (PE) calculated from these parameters. Quantitatively,2 stages of rounding are discernible. Stage I rounding is a simple retraction phenomenon where PE upshifts marginally. StageII rounding sees the cell transformed into globular refractile form where PE>0.5. Ultrastructural studies show appreciable swelling of rough ER in Stage I rounding. Stage II rounding is accompanied by enhanced swelling of rough ER and degranulation. A dynamic relationship between rough ER (RER) and smooth ER (SER) in different functional states of a cell is novel. Enlarged SER channels appear resolved in later stages as lysosomal bodies suggesting that degranulated ER membranes are lysosomal targets in autophagocytosis.View full abstractDownload PDF (3309K) -
Kunihiko KIMURA1991 Volume 68 Issue 4 Pages 251-257
Published: 1991
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSBone weight, bone and cortical areas, and apparent and true bone densities (W/BV and W/CV) were measured on the second metacarpals of 114 male and 114 female Japanese, aged 30 to 98 years. Measurements were taken from midshaft cross-sections 2 mm thick, using an electron balance and an image analyzing system. The mean values of these variables were greater in men than in women at all ages. Bone area stayed almost unchanged regardless of age. Bone weight and cortical area decreased linearly with advancing age. The respective rates of decrease per decade observed for the these variables were 3.1% and 2.9% in men and 5.5% and 4.8% in women. Apparent bone density decreased gradually with age after the fourth decade in women. While, in men, it stayed almost unchanged or increased slightly until the fifth decade and then, decreased gradually with age. The rate of decrease per decade was accelerated after the fifth decade in women and after the sixth in men, being 10.3% and 8.1% in each gender, respectively. The mean loss of bone was about twice as great in women as in men. In women, significant differences (p<0.01) were found in these variables after the seventh decade compared with the preceding age group. However, true bone density (W/CV) stayed almost unchanged regardless of age, being about 2.0 in men and about 1.9 in women. Osteoporosis could be primarily a manifestation of normal aging, including the postmenopausal estrogen deficiency in women, regardless of gender or race.View full abstractDownload PDF (1863K)
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