著者
今井 弘 荒井 善一
出版者
公益社団法人 日本分析化学会
雑誌
分析化学 (ISSN:05251931)
巻号頁・発行日
vol.40, no.3, pp.143-147, 1991-03-05 (Released:2010-01-18)
参考文献数
7
被引用文献数
1 4

1,1,3,3-テトラメトキシプロパン(TMP)の加水分解と,その生成物であるマロンジアルデヒド(MDA)をチオバルビツール酸(TBA)法によって吸光光度定量する条件を検討した. TMPはpH 1にした水溶液中で25℃, 5時間放置すると,完全に加水分解した.その速度定数は2.78×10-4s-1であった.得られたMDAはpH 0~2においてTBAと定量的に反応し, 532nmに吸収極大をもつトリメチン色素が生成した. MDAが0.5×10-6Mから6.5×10-6Mまでの範囲で,濃度と吸光度との間に比例関係が認められ,そのモル吸光係数は532nmの波長で1.4×105l mol-1cm-1であった.
著者
今井 弘道 大野 達司
出版者
北海道大学法学部
雑誌
北大法学論集 (ISSN:03855953)
巻号頁・発行日
vol.40, no.4, pp.259-270, 1990-03-20

2 0 0 0 OA 参考太平記

著者
今井弘済, 内藤貞顕 編
出版者
国書刊行会
巻号頁・発行日
vol.第2, 1914

2 0 0 0 OA 参考太平記

著者
今井弘済, 内藤貞顕 編
出版者
国書刊行会
巻号頁・発行日
vol.第1, 1914
著者
今井弘昌
出版者
岐阜女子大学
雑誌
岐阜女子大学紀要
巻号頁・発行日
no.39, 2010-03-16
著者
仲西 修 山室 宰 亀山 秀一郎 天野 裕治 東 真実 今井 弘貴 梅田 健一郎 椎葉 俊司 西 正勝
出版者
九州歯科学会
雑誌
九州歯科学会雑誌 (ISSN:03686833)
巻号頁・発行日
vol.48, no.4, pp.463-472, 1994-08-25 (Released:2017-12-21)

This study was undertaken to assess the effect of different concentrations of nitrous oxide combined with a low dosage of midazolam on pain sensation in the buccal region of the human face. Twenty healthy subjects (male : 16, female : 4), male and female varying in age from 23 to 28 years (mean ; 24.9 years) and from 23 to 30 years (mean ; 25.8 years), and weighing from 52 to 85 kg (mean ; 66.1 kg) and from 46 to 49 kg (mean ; 47.1 kg) respectively, were involved in this study. All subjects were administered midazolam (0.025 mg/kg) intravenously, and divided into three groups ; the first inhaled 25% N_2O and 75% oxygen (25% N_2O group), the second inhaled 40% N_2O and 60% oxygen (40% N_2O group), and the third inhaled 60% N_2O and 40% oxygen (60% N_2O group). All subjects were reclined on dental chair comfortably in the supine position 10 minutes prior to start of the experiment. Three control tests were carried out with inhalation of room air at 10 minute intervals. One of the three concentrations of nitrous oxide (25% N_2O, 40% N_2O and 60% N_2O) was inhaled within 5 minutes by face mask after injection of midazolam into the forearm without the subject's knowledge for 30 minutes, and the mask was removed after oxygen inhalation for 5 minutes in succession after turning off the nitrous oxide gas. Three tests each for thresholds of tactile sensation using nylon^[○!R] thread (point load 0.004 g, 0.01 g, 0.2 g), and of pain sensation using an esthesiometer (point load 1-10 g) on the buccal region of the face were made at 10 minutes' intervals during N_2O inhalation and withdrawal periods. The results obtained are as follows. 1) The threshold of tactile sensation in the buccal region increased 17% and 19% over the control in the 40% N_2O group and the 60% N_2O group, respectively, but there were no significant differences between the groups. 2) The threshold of pain sensation in the buccal region showed significant increases from the control value in the 40% N_2O group during N_2O inhalation period, and the 25% N_2O group and 60% N_2O group showed significant increases from the control value at the 10 minutes point and 30 minutes point in the inhalation period, respctively. Especially in 40% N_2O group, significant increases were seen much more than in the 25% N_2O group at the 30 minutes point in the inhalation period. 3) In the condition of consciousness of 25% N_2O group and 40% N_2O group, there were significant differences during the N_2O inhalation term, and significant decreases appeared in blood pressure and heart rate during the N_2O inhalation term. These results indicate that the analgesic effect of 40% nitrous oxide combined with midazolam and the sedative effect of 25% nitrous oxide combined with midazolam are better than those of the other concentrations of nitrous oxide. It is the best way of the dental treatment to use infiltration under the 25% nitrous oxide with midazolam (0.025 mg/kg) for patient pain and fear.
著者
アルカンタラ プリモアラン 今井 弘
出版者
Japan Concrete Institute
雑誌
コンクリート工学論文集 (ISSN:13404733)
巻号頁・発行日
vol.10, no.2, pp.13-28, 1999

A new approach in the classification of the resulting failure mode, whether shear, bond splitting or flexure, for reinforced concrete columns is presented. Particular emphasis is placed on the analysis of the strain distribution in the main reinforcement based on the truss and arch model theory. Failure mode prediction from the proposed alternative method is compared with results from several series of column experiments. The proposed method is shown to provide a high level of precision in classifying failure modes with the proper consideration of the presence of inner rows of main bars and the effect of axial loading.