DSpace コレクション: 2005-07
http://hdl.handle.net/11133/53
2005-072024-03-29T06:50:38Zコバルト(II)による鉄(III)の還元反応に及ぼすNitro-PAPSの効果とそれを利用するコバルト(II)のフローインジェクション分析
http://hdl.handle.net/11133/1646
タイトル: コバルト(II)による鉄(III)の還元反応に及ぼすNitro-PAPSの効果とそれを利用するコバルト(II)のフローインジェクション分析
著者: 田中, 美穂; 渡辺, 靖之; 大野, 慎介; 田丸, 貴臣; 手嶋, 紀雄; 酒井, 忠雄
抄録: The reduction reaction of iron(III) with cobalt(II) easily occurs in the presence of 2-(5-nitro-2-pyridylazo)-5-(ALpropyl-N-sulfopropylamino)phenol (nitro-PAPS) at pH 3.5, in which iron(II)-Nitro-PAPS chelate is formed, and the chelate has a specific absorption maximum at 790 nm. Cobalt(II) can be thus determined by measuring absorbance of the complex at above wavelength. The redox reaction is introduced into a two-channel flow system for the determination of cobalt(II). The calibration curve is linear in the concentration range of 2.5x10^<-7> M~1×10^<-5> M cobalt(II) with a sample throughput of 70 samples h^<-1>. The detection limit (S/N = 3) is 1×10^<-7> M and the relative standard deviation for 10 determinations is 0.3% for 2.5x10^<-6> M cobalt(II). The proposed flow-injection spectrophotometric method is applied to analyses of cobalt(II) in cobalt alloy (NIST SMR 862; High Temperature Alloy L 605) and pepperbush (NIES standard, No. 1) and to the indirect determination of vitamin B_<12> in pharmaceuticals.2005-07-19T15:00:00Zマイクロウェーブ照射による膨張黒鉛の生成
http://hdl.handle.net/11133/1647
タイトル: マイクロウェーブ照射による膨張黒鉛の生成
著者: 稲垣, 道夫; 小林, 伸啓
抄録: The pore structure inside the worm-like particles of exfoliated graphite prepared by microwave irradiation was studied by using image processing. The pore parameters, cross-sectional area and lengths of major and minor axes which were determined from about 17000 pores observed on the fractured surfaces of worm-like particles through image processing, were difficult to differentiate from those on the sample exfoliated by rapid heating to 1000℃. Irradiation of microwave for 60 s increased large size pores, but the average parameters showed no dependence on irradiation time. Possibility of microwave exfoliation technique for practical applicationsto exfoliated graphite production was discussed.2005-07-19T15:00:00Zポリビニルアルコールのアンモニア水溶液を用いた光触媒酸化チタンのカーボン被覆
http://hdl.handle.net/11133/1644
タイトル: ポリビニルアルコールのアンモニア水溶液を用いた光触媒酸化チタンのカーボン被覆
著者: 稲垣, 道夫; 高田, 健司; 松永, 貴文; 豊田, 昌宏
抄録: Carbon coating of photocatalyst TiQz particles were performed through sol-gel process in the aqueous solution of poly(vinyl alcohol) (PVA) with or without ammonia and following heat treatment at high temperatures, 700, 800 and 900℃. Their photoactivity was evaluated from the rate constant k for photodecomposition of methylene blue (MB) and phenol (Ph) in water, and their adsorptivity for MB and Ph was also determined. Suppression of phase transformation from anatase to rutile phase of TiO_2 by carbon coating was observed. Photoactivity of carbon-coated TiO_2 heat-treated at 700℃ for MB and Ph was improved by using ammonia solution of PVA.2005-07-19T15:00:00Zミニチュアロボットの移動計画
http://hdl.handle.net/11133/1645
タイトル: ミニチュアロボットの移動計画
著者: 池上, 朋幸; 鳥井, 昭宏; 道木, 加絵; 植田, 明照; 林, 亮
抄録: Path planning for a miniature robot, which is used in a desktop factory, is described. The robot is about 3 cm in diameter and about 40 g in weight. The robot consists of three piezoelectric elements and three electromagnets. The principle of the miniature robot is based on an inchworm. The robot realizes a linear and rotational displacement. When the robot is used on the desktop factory, the robot should move on an optimal trajectory. In this paper, the minimum operating time, which is calculated by the forward velocity and rotational velocity of the robot, is clarified. The obtained result minimizes the operating time of the miniature robot.2005-07-19T15:00:00Z