著者
山本 順寛
出版者
公益社団法人 日本油化学会
雑誌
オレオサイエンス (ISSN:13458949)
巻号頁・発行日
vol.1, no.5, pp.503-508,469, 2001-05-01 (Released:2013-04-25)
参考文献数
17
被引用文献数
4 4

脂質酸化反応の新展開についてまとめた。生体成分中で最も酸化されやすいのは高度不飽和脂肪酸を含む脂質である。高度不飽和脂肪酸の酸化はフリーラジカル連鎖酸化を受け, 一つのラジカルが数百の脂質ヒドロペルオキシドの生成をもたらす。アラキドン酸の酸化ではイソプロスタンを含む多数の酸素が付加した生成物が出来る。有機溶媒中の高度不飽和脂肪酸の酸化反応性は, 含まれるビスアリル水素の数に比例するが, 水溶性ミセル系では逆になる。基質減少量に対する酸素消費量の比をみると不飽和度が増すにつれて1から3.4へと増加するので, ドコサヘキサエン酸由来のペルオキシルラジカルはリノール酸由来のペルオキシルラジカルよりも極性が高いと考えられる。ミセル核の中に位置するブチルヒドロキシルトルエンの減少速度は不飽和度が増すにつれて低下した。したがって, より高度の不飽和脂肪酸由来のペルオキシルラジカルはミセル表面に拡散し, 結果としてフリーラジカル酸化の停止反応が亢進し, 成長反応が抑制され, 酸化反応性が低くなる。筆者らは分析操作中のアーチファクト酸化のない信頼できる, ヒト血漿中のコレステロールリノレートのヒドロ (ペルオ) キシドの立体異性体の測定法を開発した。健常人の血漿から全てのコレステロールリノレートヒドロ (ペルオ) キシドの立体異性体が検出できた。したがって, フリーラジカル連鎖酸素酸化が確実に健常人でも進行していることが明らかになった。
著者
池田 光優 三上 真人 小嶋 直哉
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:03875016)
巻号頁・発行日
vol.64, no.625, pp.3126-3132, 1998
被引用文献数
1

Attempts have been made to improve exhaust gas characteristics of the direct injection diesel engine under dual-fuel operation with gas oil and LPG. In dual-fuel operation with LPG as a sub-fuel, two kinds of LPG mixing methods can be employed. One is LPG mixing in gaseous state with the intake air, which is so-called "fumigation". The other is LPG mixing in liquid state with gas oil prior to injection. The experimental results show that the mixing method in liquid state is better than the fumigation method in terms of NO and THC emission and specific energy consumption. In the mixing method in liquid state, NO is reduced in comparison with the base engine without the increase in THC, smoke and specific energy consumption if a proper squish intensity is employed.
著者
三上 真人 八木 孝 小嶋 直哉
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:03875016)
巻号頁・発行日
vol.64, no.624, pp.2690-2695, 1998
被引用文献数
2

Occurrence behavior of microexplosion in droplet combustion of fuel mixtures is studied. Experiments were performed using unsupported droplets of n-alkane/n-hexadecane mixtures in normal gravity. It was found that the occurrence of microexplosion is stochastic and cannot be predicted by the classical criterion for microexplosion occurrence using the limit of superheat and the droplet temperature. An occurrence model for the microexplosion based on the homogeneous nucleation theory is presented and shows that the occurrence probability of the microexplosion is determined by the ratio of the liquid phase lifetime to the nucleation time during the quasi-steady vaporization period. The nucleation time is inversely proportional to the nucleation time is inversely proportional to the nucleation rate and superheated liquid volume. The relative value of the droplet temperature and the limit of superheat affects the occurrence probability through the nucleation rate. It can be well explained by the model that the occurrence probability has the maximum value for a certain initial concentration of the fuel mixture.
著者
三上 真人 加藤 秀輝 佐藤 順一 河野 通方
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:03875016)
巻号頁・発行日
vol.61, no.582, pp.731-737, 1995
被引用文献数
1

The effect of gravity on fuel droplets burning interactively has been studied experimentally. Experiments on two droplets aligned horizontally were conducted both in normal gravity and in microgravity. Results show that in normal gravity, oxygen starvation between the flames is not as severe as in microgravity. Natural convection, which supplies oxygen to the flame, is stronger at a smaller initial separation distance when two flames exist separately. The instantaneous burning rate for the same normalized droplet diameter has a maximum in normal gravity when the initial separation distance is changed and decreases monotonically in microgravity with decreasing initial separation distance, except for the initial period of burning. Thus, the effect of gravity, which decreases the burning lifetime, is greatest at a certain initial separation distance.
著者
劉 本柱 三上 真人 小嶋 直哉
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:03875016)
巻号頁・発行日
vol.62, no.600, pp.3220-3226, 1996

The flow induced noise from an expansion cavity-type muffler increases abruptly for some sizes of mufflers and flow velocities. This phenomenon is strongly related to the resonance of the tail pipe and the cavity of the muffler ; therefore, it is called the predominance of resonance″When the cavity length is increased, the measured resonance frequency shows periodic jumps. The cause of the predominance of resonance is assumed to be the generation of vortex rings with a particular frequency in the cavity. The generation of vortex rings is verified by analyzing fluctuating velocities in the cavity when the predominance of resonance occurs. The phenomenon is induced not only by the tail pipe resonance, but also by the cavity resonance. It is suggested that there exists the feedback phenomenon from the sound to the flow and it is strongly related to the sound pressure level in the cavity.
著者
三上 真人 嶺山 隆志 伊藤 勝幸 河野 通方
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集B編 (ISSN:03875016)
巻号頁・発行日
vol.62, no.600, pp.3178-3184, 1996
被引用文献数
1

The droplet combustion of n-heptane, benzene and ethyl alcohol was investigated in acoustic fields. The frequencies of the acoustic waves used were around the characteristic frequencies of droplet combustion ; the residence frequency and the diffusion frequency. Under low frequency conditions (70-200 Hz), the experimental results can be interpreted by the mechanism of quasi-steady state combustion, which includes all types of droplet combustion ; the envelope name, wake flame and flame extinction. Under high frequency conditions (300-800 Hz), the combustion is possibly influenced by a diffusional mechanism which is induced by acoustic waves of such high frequency.igh frequency acoustic waves increase the flame luminosity, especially for benzene and n-heptane droplets. This suggests that the high frequency acoustic wave enhances radiant heat transfer from the flame zone to the droplet, and thus the burning rate constant increases.
著者
劉 本柱 三上 真人 小嶋 直哉
出版者
一般社団法人日本機械学会
雑誌
日本機械学会論文集. B編 (ISSN:03875016)
巻号頁・発行日
vol.62, no.600, pp.3220-3226, 1996-08-25
参考文献数
11
被引用文献数
2

The flow induced noise from an expansion cavity-type muffler increases abruptly for some sizes of mufflers and flow velocities. This phenomenon is strongly related to the resonance of the tail pipe and the cavity of the muffler ; therefore, it is called the predominance of resonance゛When the cavity length is increased, the measured resonance frequency shows periodic jumps. The cause of the predominance of resonance is assumed to be the generation of vortex rings with a particular frequency in the cavity. The generation of vortex rings is verified by analyzing fluctuating velocities in the cavity when the predominance of resonance occurs. The phenomenon is induced not only by the tail pipe resonance, but also by the cavity resonance. It is suggested that there exists the feedback phenomenon from the sound to the flow and it is strongly related to the sound pressure level in the cavity.
著者
和泉 晴夫 三上 真人 小嶋 直哉
出版者
山口大学工学部
雑誌
山口大学工学部研究報告 (ISSN:03727661)
巻号頁・発行日
vol.49, no.1, pp.1-6, 1998-10

気流を伴う消音器内で発生する気流音の特性は,流速や消音器構造に複雑に依存しており,共鳴音を含め音響学的解明は不十分である。本研究は,気流音の発生メカニズムを従来の研究よりさらに深く洞察するために,実験的に空胴部共鳴周波数と尾管部共鳴周波数の間に移行現象があることを認めたので,理論的考察の一方法として四端子定数で厳密計算し,周波数移行現象の予測と実験との対応を行い,発生機構の整理を行った。
著者
三上 真人 大八木 大史 小嶋 直哉 菊池 政雄 若嶋 勇一郎 依田 真一
出版者
一般社団法人 日本燃焼学会
雑誌
日本燃焼学会誌 = Journal of the Combustion Society of Japan (ISSN:13471864)
巻号頁・発行日
vol.45, no.134, pp.238-247, 2003-11-30
参考文献数
30
被引用文献数
3

<p>A new concept of the droplet array generation technique was proposed to realize a high quality and high reliability performance of microgravity experiments of multiple-droplet combustion. Each fuel droplet was formed on the intersection of the X-shape fine SiC fibers by supplying the liquid fuel through a fine glass tube. Several sets of the X-shape fibers and corresponding fine glass tubes were aligned at an interval to make a droplet array. All the droplets in array were simultaneously generated in a short time. In flame spread experiments, an end-droplet was ignited by a hot-wire igniter to initiate the flame spread along the array. Microgravity experiments of droplet array combustion were demonstrated with the new droplet array generation technique using a drop experiment facility MGLAB in Japan. In microgravity, large droplets, which were often failed to be generated in normal gravity, were successfully generated through this method. The present technique is also effective in droplet array combustion experiments using a high-volatility fuel, whose prevaporization is not negligible. The flame spread rate and the flame spread limit of linear droplet arrays were compared with existing experimental results. Effects of the suspending fiber on the flame spread were also discussed.</p>
著者
三上 真人 加藤 秀輝 佐藤 順一 河野 通方
出版者
一般社団法人日本機械学会
雑誌
日本機械学会論文集. B編 (ISSN:03875016)
巻号頁・発行日
vol.61, no.582, pp.731-737, 1995-02-25
参考文献数
16
被引用文献数
1

The effect of gravity on fuel droplets burning interactively has been studied experimentally. Experiments on two droplets aligned horizontally were conducted both in normal gravity and in microgravity. Results show that in normal gravity, oxygen starvation between the flames is not as severe as in microgravity. Natural convection, which supplies oxygen to the flame, is stronger at a smaller initial separation distance when two flames exist separately. The instantaneous burning rate for the same normalized droplet diameter has a maximum in normal gravity when the initial separation distance is changed and decreases monotonically in microgravity with decreasing initial separation distance, except for the initial period of burning. Thus, the effect of gravity, which decreases the burning lifetime, is greatest at a certain initial separation distance.
著者
渡邉 雅之
出版者
公益財団法人大原記念労働科学研究所
雑誌
労働科学 (ISSN:0022443X)
巻号頁・発行日
vol.90, no.2, pp.71-75, 2014 (Released:2016-01-25)
参考文献数
6

呼吸用保護具の漏れ率を確認する定量フィットテスターは日本では 「労研マスク・フィッティングテスターMT-03(柴田科学株式会社製)」,欧米では 「PortaCount Pro(米国TSI社製)」 が主に使用されている。本研究では株式会社重松製作所からの提案のもと柴田科学株式会社が開発した定量フィットテスター 「マスク内圧・フィッティングテスター(MNFT)」 のマスク内圧および漏れ率について検証を行った。対象マスクは取替え式防じんマスク(DR)と電動ファン付き呼吸用保護具(PAPR)を使用した。結果よりMNFTは呼吸用保護具の漏れ率をリアルタイム観察できるため,装着状況の改善や呼吸用保護具の性能評価に有用であることが示された。(図7,表1)

1 0 0 0 OA 恵合余見

著者
北尾紅翠斎<北尾重政(1世)>//〔ほか〕画

天明7(1787)年の大小暦237枚(1冊)と、明和2年から文化年間(1765-1818)の88枚(1冊)を収録。主な絵師は、歌川豊春、歌川豊国、鳥居清長、司馬江漢、磯田湖龍斎、窪俊満、葛飾北斎、菱川宗理、喜多川歌麿など。大小暦については、『絵暦張込帳』(請求記号 寄別13-64)の解説参照。