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Male Infertility and Fictional Narratives: A Study on the Difference between Empirical Studies and Media Representations
Get PDFこれまでの男性不妊をめぐる研究は、医療技術史、当事者の調査、ジェンダー研究の分野で進められてきた。その中心をなす男性不妊の当事者への聞き取り調査は、男性にとって男性不妊症がスティグマになること、不妊治療によって子どもを得ることでスティグマを解消できること、性的・生殖能力の問題である以上に「夫婦（家族）の問題」であることを解明してきた。 しかし、当事者の研究が中心であるため、物語（小説・映画・マンガなど）においてどのように表象されているのか、という点についての検討を行っていない。本稿では、2010 年代なかばから現在にかけて発表された男性不妊の登場する作品を対象に、実証研究とメディア表象の異同を確認した。 分析の結果、こうした作品群は、語りを収録するメディアが変化したことによって、「夫婦（家族）の問題」として描き出す傾向を示しているが、男性当事者の口から語られていたスティグマを他の登場人物に代弁させたり、男性が不妊治療の経験を語ることの難しさ、男性不妊をスティグマ化している現象を物語の中心に据えていることは、依然として男性不妊が「男性の問題」という域を出ていないという点を導出した。departmental bulletin pape
Isolation of lipid-rich marine diatoms from the coastal waters of the Goto Islands, Japan
Get PDFFive diatom strains were isolated from the coastal waters of Goto Islands and their fatty acid content and composition were evaluated. Fatty acid composition of the isolates showed a similar tendency, and fatty acids of 14:0, 16:0, and 16:1 (n-7) accounted for the majority, comprising 7.4 to 27.2% of the total, 3.8 to 37.1% of the total, and 15.7 to 59.6% of the total, respectively. In addition, most isolates contained polyunsaturated fatty acid of 20:5 (n-3) (eicosapentaenoic acid, EPA) and docosahexaenoic acid (DHA), which are essential fatty acids in marine organisms. Among the isolates, a pennate diatom cf. Diploneis sp. contained the highest EPA. The potential of the pennate diatom for aquaculture feed, and the ecological significance of EPA and DHA content of diatoms in marine food webs in the vicinity of Goto Islands are briefly discussed.departmental bulletin pape
チャイニーズドームダイジェスター（CDD）の構造改変：嫌気性硝化性能の向上を目指した新規二方向流チャイニーズドームダイジェスターの開発
Get PDF創価大学博士（工学）The Chinese dome digester (CDD) is a self-mixed and widely used household digester in developing countries, treating biodegradable waste, like food waste and animal manure. The self-mixing in CDD depends on the volume of slurry displacement in the main digester and expansion tank during gas production and gas release. However, insufficient mixing leading to scum formation poses a persistent challenge in CDD operation. Scum composes of fats, oils, undegraded particles and microbes that forms a thick layer on the slurry surface, reducing the working volume, hampering methane release, which affects the stability and efficiency of CDD. Therefore, there is a need to improve mixing for the prevention of scum and enhance methane yield in CDD. In this study, mixing frequency was optimized and the structural design of CDD was modified to improve mixing. In study 1, optimization of mixing frequency to break scum and enhance methane yield was evaluated based on semicontinuous anaerobic digestion (AD). In study 2, the mixing performance of a proposed (novel) modification of CDD known as two-way flow CDD (TWF-CDD) was evaluated by computational fluid dynamics simulation. In study 3, the treatment performance of a novel TWF-CDD was evaluated in semicontinuous AD. The results of study 1 indicated that 4-times mixing per day was the optimum mixing frequency to suppress scum, although scum was not entirely prevented. In study 2, TWF-CDD improved mixing by 21% compared to conventional CDD and study 3, methane yield improved, and scum was prevented in all the mixing conditions in TWF-CDD.doctoral thesi
