著者

矢田部 龍一 八木 則男 佐藤 修治 長谷川 修一

出版者

The Japan Landslide Society

雑誌

地すべり (ISSN:02852926)

巻号頁・発行日

vol.34, no.2, pp.42-49_1, 1997-09-15 (Released:2011-02-25)

参考文献数

10

被引用文献数

3 4

---

本報告は四国の中央構造線に沿った道路建設に伴い発生した地すべり地の特性について検討を行ったものである。その結果, 地すべりは大半が切土に伴う崩積土のすべりであり, 規模は比較的小規模なものが多く, また, 中央構造線の断層破砕帯の地すべり地の粘性土のせん断抵抗角は小さく, 難工事となりやすいことがわかった。

著者

佐藤 修治

出版者

耳鼻咽喉科臨床学会

雑誌

耳鼻咽喉科臨床 (ISSN:00326313)

巻号頁・発行日

vol.81, no.3, pp.433-452, 1988-03-01 (Released:2011-11-04)

参考文献数

53

被引用文献数

1 1

---

The cupula and the subcupular space were studied by scanning electron microscope (SEM) in ginea pigs, pigeons and chicks. Some ampullae were fractured by a styren lesion for observation of the relationship between the sensory hairs and the cupula. Electronmicroscopy revealed that the side of the cupula consists of a tubular structure. There were a number of small holes in the top and the bottom of the Cupula. On the surface of the crista were observed many small granules secreted by the supporting cells. Many sensory hair bundles traversed the subcupular space and were in contact with the cupular base.In a physiological study, the cupula of the Rana catesbiana was stimulated either by direct pressure or by mechanical endolymphatic flow. Action potentials from the posterior ampullary nerve were recorded before and after removal of the cupula and the subcupular substance. After cupular removal no action potential was evoked. When the cupula was replaced in the crista, the maximum frequency of the action potential in response to both direct pressure and mechanical endolymphatic flow recovered. However, the time course of the response was shorter than that prior to cupular removal.The cupula and the subcupular space were analyzed histochemically by light and electron microscopy. The ampulla of the chick was stained by periodic acid-Schiff (PAS), diastase-PAS, alcian blue-hyaluronidase, AB (pH2.5), AB (pH1.0), HID and AB-sialidase. The cupula and the intracellular microglomerus of the supporting cells contained mainly sialoglycoprotein (sialomucin). The cupula and the subcupular space were studied by both secondary electron (SE) image and backscattered electron (BSE) image. Ruthenium red (RR) staining was used for SEM observation of BSE image. The cupula and the granules of the crista surface contained mainly acid glyconjugate. Thus, the cupula and the gelatinous substance in the subcupular space contained mainly sialoglycoprotein.