巻号一覧
88 巻 (2011)
- 4 号 p. 133-
- 3 号 p. 89-
- 2 号 p. 43-
- 1 号 p. 1-
88 巻, 1 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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Takehito IMAI2011 年 88 巻 1 号 p. 1-9
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーThe influence of human hair bleaching agents with different bleaching strength on the ultrastructure of human hair was studied using a transmission electron microscope (TEM) and an energy dispersive X-ray spectrometer equipped with TEM (EDS-TEM). Two kinds of bleaching agents were used: a lightener agent with a weak bleaching effect and a powder-bleach with a stronger bleaching effect.
From the comparison of the bleaching properties obtained by the electronic staining of black and white hair samples, it was suggested that the permeability of hair was increased by bleaching, and there was an increase of the stainability of hair subjected to electronic staining. The bleaching action provoked the decomposition of melanin granules and the flow out of granular contents into the intermacrofibrillar matrix. Some metal elements were detected in the melanin granular matrix by EDS-TEM. As a result, the diffusion of metal elements into the intermacrofibrillar matrix promoted further damage to the hair by catalytic action with the hydrogen peroxide in the bleaching agents outside the melanin granules. Further study will lead us to the edge of the development of a new bleaching agent, which reacts only with melanin granules and causes the minimum of damage to outside the melanin granules.抄録全体を表示PDF形式でダウンロード (2735K) -
Keiichi MORIGUCHI, Michiya UTSUMI, Norikazu OHNO2011 年 88 巻 1 号 p. 11-16
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーAfter glutaraldehyde fixation followed by osmium tetroxide postfixing, the secretory granules of acinar cells in male hamster submandibular glands (SGs) exhibit a characteristic bipartite substructure, with an electron-lucid rim and a more electron-dense central core. In female hamsters, the reverse is seen, with the larger portion of the granules forming an electron-lucid core and an outer electron-dense crescent rim. In the present study of endogenous peroxidase (PO) activity of male and female hamster SGs, secretory granules in the acinar cells were studied by DAB cytochemical technique. Individual granules showed bipartite substructure with the PO activity in a positive center core and unreacted lucid rim in both the male and the female acinar cells. Through isolation of granular fractions, the male and the female granules exhibited the same bipartite structure. We also examined the relation between the PO activity and counterstained areas in male and female hamster SGs, and the secretory granules of acinar cells by using EFTEM. In the male SG, the secretory granules exhibited the characteristic bipartite substructure to carry out parallel-EELS, nitrogen reflecting the presence of DAB moieties and uranium from counterstaing the presence the central core but not in the rim. On the other hand, the female bipartite secretory granules of the SG, exhibit the nitrogen reflecting the presence in the central core and uranium in the rim.抄録全体を表示PDF形式でダウンロード (1368K) -
Scanning electron microscopic study of the tongue in the rainbow lorikeet (Trichoglossus haematodus)Shoichi EMURA, Toshihiko OKUMURA, Huayue CHEN2011 年 88 巻 1 号 p. 17-21
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーThe dorsal lingual surfaces of rainbow lorikeet (Trichoglossus haematodus) were examined by scanning electron microscopy. Macroscopically, the tongue of the rainbow lorikeet has a finger-like shape. Three parts are distinguished in the dorsal surface of the tongue: the apex, body, and root of the tongue. The apex of the tongue has numerous processes inclined toward medial side from lateral side. These processes are rod-like structure and smooth surfaces. Many grooves are observed in both lateral sides of the lingual body. A large opening of the lingual gland exists in central part of the lingual root and some large openings of the lingual glands exist in both lateral sides of the lingual root.抄録全体を表示PDF形式でダウンロード (2653K) -
Shoichi EMURA, Toshihiko OKUMURA, Huayue CHEN2011 年 88 巻 1 号 p. 23-27
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーWe examined the dorsal lingual surfaces of an adult sitatunga (Tragelaphus spekei) by scanning electron microscopy. Filiform, fungiform and vallate papillae were observed. The filiform papillae consisted of a larger main papilla and smaller secondary papillae. The filiform papilla contained connective tissue core consisting of several processes. The fungiform papillae were round in shape. The connective tissue core of the fungiform papilla was flower-bud shaped. Lenticular papillae were limited on the torus lingua. The connective tissue core of the lenticular papilla consisted of numerous small spines, or these spines and rod-shaped processes. The vallate papillae were flattened-oval shaped and the papillae were surrounded by a circular trench. The connective tissue core of the vallate papilla was covered with numerous small spines. These findings indicate that the tongue of the sitatunga is similar to that of the blackbuck and Barbary sheep.抄録全体を表示PDF形式でダウンロード (2569K) -
Mitsuo IINUMA, Sayoko YASUI, Mika OONISHI, Chika KURATA, Yukiko ICHIHA ...2011 年 88 巻 1 号 p. 29-36
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーWe investigated the effect of tooth absence and masticatory abnormalities due to powdered food feeding starting during the juvenile period on light and dark period activity cycles in senescence-accelerated mice (SAMP1) . SAMP1 were divided into 5 groups: Group 1, maxillo-mandibular molar tooth extraction; Group 2, maxillary molar tooth extraction; Group 3, mandibular molar tooth extraction; Group 4, powdered food; and Group 5, sham-operated control. Senescence was observed earliest in the powdered food group. Total 24-hour activity was higher in the control group than in the four other groups. In the powdered food group, the dark period activity decreased to less than 60% of the total activity in the 36th week. In the tooth extraction groups (Groups 1-3), dark period activity decreased to less than 60% of the total activity in the 40th week. The control group dark period activity remained above 60% for the entire experimental period. Thus, the distinction between the light and dark periods disappeared earlier in the four experimental groups compared with the control group. Significant correlations were noted among total activity, degree of senescence, and percent dark period activity in each experimental group. Functional masticatory insufficiency promoted dementia and behavioral abnormalities in SAMP1.抄録全体を表示PDF形式でダウンロード (963K) -
Akira IIMURA, Takeshi OGUCHI, Masakazu SHIBATA, Masato MATSUO, Tsuneo ...2011 年 88 巻 1 号 p. 37-42
発行日: 2011年
公開日: 2012/02/10
ジャーナル フリーIn a student course of gross anatomy dissection at Kanagawa Dental college in 2008, we found an extremely rare case of the double superior vena cava that has a shunt between the right and left atria of a 81-year-old Japanese male cadaver. The left superior vena cava passed through the space between the left cardiac auricle and the left pulmonary vein and entered the coronary sulcus. Then it opened near the opening of the inferior vena cava as the coronary venous sinus to the right atrium. The upper edge of the interatrial septum was located at the site where the right superior vena cava opened to the right atrium. Accordingly, the right atrium connected with left atrium through this site. We discuss the anatomy and etiology of these anomalous structures with a brief review of the literature.抄録全体を表示PDF形式でダウンロード (1199K)
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