巻号一覧
72 巻, 6 号
選択された号の論文の6件中1～6を表示しています
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Takahiro HIRATSUKA, Mitsuo ABE, Kazushige TAKEHANA, Kenji IWASA, Takeo ...1996 年 72 巻 6 号 p. 285-295
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーThe distribution of endocrine cells and the areas of islets in the bovine pancreas were investigated by immunohistochemical methods. The islets in the A-region, which consisted of the left lobe, the ventral portion of the body, and the ventral and distal portions of the right lobe, contained a central core of insulin-containing (B-) cells surrounded by glucagon-containing (A-) cells, a few somatostatin-containing (D-) cells and sporadic pancreatic polypeptide-containing (PP-) cells. The islets in the B-region, which consisted of the uncinate process, and the dorsal and proximal portions of the body and the right lobe, contained a central mass of B-cells, and peripheral cells which were predominantly PP-cells with a few D-cells, but no A-cells. The areas of islets in the B-region were small as compared with those in the A-region. From these findings it is suggested that A-and PP-cells have a complementary relationship to one another. In view of this hypothesis, two types of islet, A-cell-rich and PP-cell-rich islets, were identified. The A-region contained A-cell-rich islets derived from the dorsal pancreatic primordium, while the B-region contained PP-cell-rich islets that originated from the ventral primordium. In the bovine pancreas, the areas containing PP-cell-rich islets are greater than those in previously examined species.抄録全体を表示PDF形式でダウンロード (3286K) -
Thomas KOPPE, Olav ROHRER-ERTL, Dietbert HAHN, Ralf REIKE, Hiroshi NAG ...1996 年 72 巻 6 号 p. 297-306
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーThe relationship between the palatal form and the maxillary sinus was studied in 40 skulls of male and female Bornean orang-utans (Pongo satyrus borneensis) ontogenetically. Univariate analyses of the measurements of the palate and the maxillary sinus showed that the sexual dimorphism appeared earlier in palatal length than in the maxillary sinus volume. Bivariate statistical analyses, including correlation and linear regression analyses, revealed close relationships between the characteristics of the palate and the maxillary sinus for both the growth period and the adult status. Partial correlation coefficients showed, however, that these relations were highly influenced by the skull size. Except significant correlations between the maxillary sinus width and the palatal volume in the adult status, all partial correlation coefficients were clearly below the Pearson's correlation coefficients. In contrast to the situation in humans, this study suggests that under physiological conditions the influence of the palatal form on the maxillary sinus size in the orangutan is very small. Alterations of the craniofacial morphology during the evolution of the hominids, such as facial reduction and decrease of the maxillary sinus size, are considered important factors which led to changes of the relations between the palatal form and the maxillary sinus.抄録全体を表示PDF形式でダウンロード (2244K) -
Hidekazu WAKURI, Jiwu LIU, Yaoxing CHEN, Ken-ichiro MUTOH1996 年 72 巻 6 号 p. 307-316
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーIn twelve Chinese miniature pigs (CMP), of both sexes and ranging from newborn to 5 months of age, the postnatal developmental features of the cleavage lines of the skin of the whole body were examined by the stab-wound method, using a metal probe with a sharp conical point.1). The CL patterns of the skin in the 5-month-old CMP were largely similar to those of adult Landrace-strain pigs (Wakuri et al.,1993).2). At each monthly stage, the CL of the skin of the inter-ocular area, medial ocular angle, umbilicus, preputial orifice and anus presented a convergent arrangement. An annular pattern was found in the skin around the eye, the base of the ear, and the vulva.3). Some alterations in CL patterns were seen during the general and regional growth of CMP, as shown in the skin of the lateral side of the trunk, the prepuce and the scrotum.抄録全体を表示PDF形式でダウンロード (2118K) -
Eizo WAKATSUKI, Shintaro KONDO, Masato ARAI, Huang SHUN-TE, Chuang SHE ...1996 年 72 巻 6 号 p. 317-322
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーThe reduction index of deciduous teeth was investigated statistically. Materials used were plaster casts of the deciduous dentition taken from Chinese children living in Taiwan. The reduction indices showed no sexual differences. In the maxillary teeth, reduction indices of the bucco-lingual diameters (BL) had the largest values, followed by those of the mesio-distal diameters (MD), and those of the crown area (AREA) which were the least. In contrast to the maxillary teeth, in the mandibular teeth, the reduction indices of MD and those of BL had nearly the same values although the reduction indices of MD were slightly larger than those of BL in females (P<0.05). With respect to the difference between the maxilla and the mandible, in deciduous incisors the reduction index of MD in the mandible was larger than that in the maxilla (P<0.01). While in BL the reverse relation was noted. In the deciduous molars the reduction indices of BL and AREA in the maxilla were larger than those in the mandible (P<0.01). The reduction indices showed no significant difference among the Mongoloid populations sampled. This result may be explained by the primitiveness of deciduous teeth.抄録全体を表示PDF形式でダウンロード (1239K) -
Nobuo MOTEGI, Sadami TSUTSUMI, Eizo WAKATSUKI1996 年 72 巻 6 号 p. 323-328
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーAlthough there have been several studies of finite element method (FEM) analysis on two dimensional (2D)facial growth with cephalometric X-rays, there has been little FEM analysis on three dimensional (3D) facial growth of long term observation. Therefore the objective of our study is to use FEM model by 3D surface measurement of rapid laser device from human dried skull and to analyze the changes of facial growth based on FEM by the volume and the direction of strain in each stage. Samples were taken from each human dried skull for 5 stages; about 0,3,6,9,12 and 18 years of age, a total of 6normal human dried skulls. (No abnormal skeletal growth patterns were selected and age was supposed by tooth development and eruption. )After measuring each human dried skull by 3D rapid device, we selected the clearest 16 anatomical reference points from about 70,000 points on face image to form accurate FEM shells. The study utilized Cosmos/M (SRAC) for FEM analysis, on a PC(NEC). From the strain analyses, it was revealed that (1) The vale of growth strain from 0 to 3 years of age and from 3 to 6 years of age gradually increased from condylar area toward mental area and the most vale of growth strain was showed at mental area. The vale of growth strain of corpus area was bigger than other areas. (2) As a whole the vale of growth strain of other areas except mental, corpus and nasal area were almost equal. These results indicate especially the growth change of mandible were predominantly showed in the early stages, and the direction of growth strain changed backward and above from mental area to condylar area.抄録全体を表示PDF形式でダウンロード (2322K) -
Yuichi SASAYAMA, Kumiko TANIGUCHI, Nobuo SUZUKI, Ajai K. SRIVASTAV1996 年 72 巻 6 号 p. 329-332
発行日: 1996/03/21
公開日: 2012/09/24
ジャーナル フリーIn the aquatic limbless newt, Typhlonectes compressicauda (Apoda, Amphibia), serum Ca levels of parathyroidectomized newts were no lower than for the control newts at 1 week after the operation. In this species, the parathyroid glands may not be functional in raising the serum Ca levels.抄録全体を表示PDF形式でダウンロード (1400K)
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