Fibrational Theory of Behaviors and Observations: Bisimulation, Logic, and Games from Modalities

総合研究大学院大学博士（情報学）application/pdf総研大甲第2415号doctoral thesi

クスノオオキクイムシとアンブロシア菌の共生機構とその適応的意義

名古屋大学NAGOYA University博士(農学)名古屋大学博士学位論文 学位の種類:博士(農学) (課程) 学位授与年月日:平成6年3月25日doctoral thesi

Financial and Accounting Reporting Regulations for Business Enterprises

翻訳application/pdfdepartmental bulletin pape

The Convergence of Accounting Standards : A Strategy of Chinese Accounting Convergence

研究application/pdfdepartmental bulletin pape

A Case of Congenital Open-Type Cholesteatoma Diagnosed by Diffusion-Weighted MRI Using the PROPELLER Technique

浜松医科大学医学部耳鼻咽喉科・頭頸部外科学教室　峯田周幸教授退任記念論文集～症例から学ぶ～Festschrift for Professor Hiroyuki Mineta In Hornor of His Retirement as Chairman of Hamamatsu University School of MedicineCongenital cholesteatoma in the tympanic cavity can be divided into two types - the closed-type cholesteatoma, which takes the form of a keratotic cyst, and the open-type cholesteatoma, characterized by a flat surface of the epidermis on the middle ear mucosa. Closed-type cholesteatoma is usually identified as a globular white mass through a normal tympanic membrane; whereas the tympanic membrane appears normal in open-type cholesteatomas. Therefore, it is difficult to diagnose open-type cholesteatomas, which are often identified accidentally during exploratory tympanotomy for preoperative diagnoses such as conductive hearing loss. Herein, we report a case of open-type cholesteatoma, in which the diagnosis was suspected from the findings of diffusion-weighted MRI examination using the periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) technique. An 18-year-old male presented to our hospital with the complaint of right hearing loss, which was suspected at a previous ENT clinic to be caused by a congenital ossicular anomaly. Otoscopic examination failed to reveal any abnormalities. Pure-tone audiometry showed moderate conductive hearing loss in the right ear. Computed tomography of the temporal bone revealed a defect of the long process of the incus and superstructure of the stapes, with a surrounding shadow that appeared to be soft tissue. On the basis of these findings, we suspected an open-type cholesteatoma with a defect of the ossicles. Diffusion-weighted MRI examination using the PROPELLER technique showed a high-intensity in the temporal bone, suggestive of a cholesteatoma. We performed exploratory tympanotomy, and found the open-type cholesteatoma in the middle ear. The cholesteatoma was removed without ossiculoplasty, and until now, nine months after the surgery, there has been no sign of recurrence. Our case showed the usefulness of diffusion-weighted MRI using the PROPELLER technique for the diagnosis of the open-type cholesteatoma. The possibility of open-type cholesteatoma should be borne in mind in patients diagnosed preoperatively as having a congenital ossicular anomaly, and diffusion-weighted MRI with the PROPELLER technique is indicated in such patients towards confirming the diagnosis.journal articl

新しい時代に対応した理科授業の在り方を考える：理科における活用型学習活動の実践を通して（第55回(平成22年度）公開研究発表会 理科発表要項）

text紀要論文 / Departmental Bulletin Paperdepartmental bulletin pape

木炭のホルムアルデヒド吸着特性

application/pdfホルマリン系の接着剤を使った木質材料から放散されるホルムアルデヒド(HCHO)が、いわゆるシックハウス症候群とよばれるアレルギー様疾患の主原因と考えられ、その対策が急がれている。そこで本研究では、空気中に遊離しているHCHOを木炭で吸着することを考え、吸着能力および保持能力を他材料と比較検討した。 吸着材として各種の木炭、木材、パーティクルボード、無機質ボードを用いた。実験はデシケータ内に一定のHCHOを入れ、各種吸着材による吸着量または放散量を、検知管を用いて測定した。得られた主な結果は次の3点である。 1) HCHOの吸着能は木炭の種類によらなかったが、木炭の形状、および木炭量に大きく依存した。 2) 木炭を繰り返し使用すると吸着能力が低下したが、長時間の室内放置または温度を上げることによって元に近い吸着能力を回復した。 3) 木質材料や無機質ボードにもHCHO吸着能力が観測されたが、これらの材料は一旦吸着したHCHOを放散しやすい性質があった。それに比べて木炭は、吸着力に優れ、しかも放散しにくいという吸着材として優れた性質を持っていた。Formaldehyde emission from formaldehyde containing materials leads to air contamination in houses, which is called "sick house syndrome". It is said that liberated formaldehyde is absorbed by wood charcoal. However, the capability of wood charcoal has not been fully known yet. In this study, the basic characteristics of wood charcoal were investigated. Wood charcoal or other absorbers were placed into a closed desiccator and the reduction of formaldehyde was measured. Formaldehyde analysis was performed by using a gas detecting tube. 1) The difference of liberation rate of formaldehyde between the wood charcoals was not significant, but particle size and volume affected measured adsorption rate. 2) Repeated use of wood charcoal showed the degradation of absorbing ability, but the ability was recovered by storing it at the romm temperature two nights or at 39℃ for eight hours. 3) Wood-based materials and inorganic materials could absorb formaldehyde no more than wood charcoal and wood bark, and their formaldehyde holding ability was poorer than that of wood charcoal.departmental bulletin pape