著者

三原 悠 浅野 一朗 段 智久 岡村 秀雄 松村 千里 羽賀 雄紀 中坪 良平

出版者

公益社団法人 日本マリンエンジニアリング学会

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.56, no.3, pp.473-483, 2021-05-01 (Released:2021-06-02)

参考文献数

29

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As a way to improve the combustion characteristics of wood tar which is highly viscous and flame retardant, the authors blended it with liquefied dimethyl ether (DME), which can improve fuel fluidity, ignitability and spray atomization. Moreover, heavy fuel oil (bunker-c oil) was added to increase the heating value of this fuel sample. The sample, which has the blending ratio of 35 % wood tar, 30% DME and 35% bunker-c by weight, was used in a combustion test with a three-cylinder in-direct injection diesel engine. Additionally, the authors also investigated particulate matter (PM) produced after burning four samples that mixed liquefied DME with flame retardant fuels in the same engine to analyze its environmental and biological impacts. The four samples prepared for the experiment were (1) 70% distillate oil (bunker-a) and 30% DME; (2) 85% bunker-c and 15% DME; (3) 70% bunker-c and 30% DME; (4) 35 % bunker-c, 30% DME and 35% wood tar.  The results of the engine test suggested the possibility that wood tar could become more combustible by optimizing the flow rate of fuel and the blend ratio of liquefied DME and bunker-c. In the (4) case, PM showed no high mutagenic potentials and there were lower concentrations of such inorganic substances as vanadium and nickel. Polycyclic aromatic hydrocarbons (PAHs) concentrations in PM decreased by blending liquefied DME with bunker-c, whereas did not decrease for the wood tar.

著者

三原 悠 門 浩志 黒瀬 亮 辻中 瑛里香 中村 匡志 足立 大也 山内 明日香 深井 邦剛 八田 告

出版者

一般社団法人 日本透析医学会

雑誌

日本透析医学会雑誌 (ISSN:13403451)

巻号頁・発行日

vol.55, no.4, pp.265-269, 2022 (Released:2022-04-28)

参考文献数

23

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症例は94歳,女性.入院1年4か月前に腎硬化症を原疾患とした末期腎不全に対し,長期型バスキュラーカテーテルを左内頸静脈に留置し血液透析を開始していた.入院2日前に転倒し,右肩を打撲した.右肩の疼痛増悪,血液透析時の血圧低下をきたしたため入院となった.入院10日目に脱血不良のためカテーテル抜去を試みたが,皮下のカフを剥離した状態にもかかわらず強い抵抗を認めた.入院11日目に透視下造影検査でカテーテルにガイドワイヤーを挿入し,血管壁の付着を剥離しカテーテルを抜去した.日本において,長期型バスキュラーカテーテルは血液透析患者の高齢化とともに使用が増加してきており,抜去困難となるケースにおいては慎重に対応する必要がある.

著者

三原 悠 浅野 一朗 段 智久 岡村 秀雄 松村 千里 羽賀 雄紀 中坪 良平

出版者

公益社団法人 日本マリンエンジニアリング学会

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.56, no.3, pp.473-483, 2021

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<p>  As a way to improve the combustion characteristics of wood tar which is highly viscous and flame retardant, the authors blended it with liquefied dimethyl ether (DME), which can improve fuel fluidity, ignitability and spray atomization. Moreover, heavy fuel oil (bunker-c oil) was added to increase the heating value of this fuel sample. The sample, which has the blending ratio of 35 % wood tar, 30% DME and 35% bunker-c by weight, was used in a combustion test with a three-cylinder in-direct injection diesel engine. Additionally, the authors also investigated particulate matter (PM) produced after burning four samples that mixed liquefied DME with flame retardant fuels in the same engine to analyze its environmental and biological impacts. The four samples prepared for the experiment were (1) 70% distillate oil (bunker-a) and 30% DME; (2) 85% bunker-c and 15% DME; (3) 70% bunker-c and 30% DME; (4) 35 % bunker-c, 30% DME and 35% wood tar.</p><p>  The results of the engine test suggested the possibility that wood tar could become more combustible by optimizing the flow rate of fuel and the blend ratio of liquefied DME and bunker-c. In the (4) case, PM showed no high mutagenic potentials and there were lower concentrations of such inorganic substances as vanadium and nickel. Polycyclic aromatic hydrocarbons (PAHs) concentrations in PM decreased by blending liquefied DME with bunker-c, whereas did not decrease for the wood tar.</p>